- Faculty of Science - Mansoura University - El-Mansoura - Aldakahlyia - Egypt
- 01017229120
Environmental pollution and its eco-toxicological impacts have become a large and interesting concern worldwide as a result of fast urbanization, population expansion, sewage discharge, and heavy industrial development. Nine heavy metals... more
Environmental pollution and its eco-toxicological impacts have become a large and interesting concern worldwide as a result of fast urbanization, population expansion, sewage discharge, and heavy industrial development. Nine heavy metals (Pb, Cd, Fe, Mn, Zn, Ni, Cu, Cr, and Co) were evaluated in 20 sediment samples from the estuaries of four major drains along the Mediterranean shoreline (Nile Delta coast) to determine the possible ecological effect of high heavy metal concentrations as well as roots and shoots of two common macrophytes (Cyperus alopecuroides and Persicaria salicifolia). For sediment, single- and multi-elemental standard indices were used to measure ecological risk. Data revealed high contents of heavy metals, for which the mean values of heavy metals in sediment followed a direction of Fe > Mn > Co > Zn > Cu > Ni > Cr > Pb > Cd, Fe > Mn > Co > Ni > Zn > Cu > Cr > Pb > Cd and Fe > Mn > Zn > Co > Cu > Ni ...
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Carduus pycnocephalus L, which is related to the Astraceae family, was well-known as a privileged medicinal plant that has innumerable respected biological potency. The current research aims to identify the chemical constitutes of the... more
Carduus pycnocephalus L, which is related to the Astraceae family, was well-known as a privileged medicinal plant that has innumerable respected biological potency. The current research aims to identify the chemical constitutes of the essential oils of the extracted C. pycnocephalus by Gas Chromatography-Mass Spectroscopic analysis (GC-MS) and to assess the biological profiles of the plant and its botanical ingredients as a precise antioxidant, and anticancer, as well as, antimicrobial agents. The extraction process of the medicinal plant by methanol provided a possibility to extract and identify the polar chemical constitutes that have the most effective categories of components. The DPPH antioxidant potency of the botanical ingredients of the plant indicated that the flower extract is the most potent with IC50 = 30.69 mg/L followed by leaves (IC50= 32.78 mg/L), stem (IC50= 41.31 mg/L), and root (IC50= 46.84 mg/L). The antibacterial activities of the root, stem, leaf, and flower ex...
Research Interests: Plant Biology and Ecology
The efficacy of nine flavonoid and one saponin compounds against COVID-19 protease was evaluated using molecular docking studies.
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Proximate composition of the aerial parts of three Fagonia species (Fagonia arabica L., F. mollis Delile and F. cretica L.) collected from different habitats were analyzed. Macro- and micro-elements as well as some secondary metabolites... more
Proximate composition of the aerial parts of three Fagonia species (Fagonia arabica L., F. mollis Delile and F. cretica L.) collected from different habitats were analyzed. Macro- and micro-elements as well as some secondary metabolites were estimated. The obtained results revealed that F. creticus contains appreciable levels of nutritive components considering that its nutritional value (351.06 kcal/100g dry wt.) was remarkably higher than that of F. arabica and F. mollis (327.99 and 293.07 kcal/100g dry wt., respectively). The concentration of Na was relatively the highest among the other estimated macroelements in the studied species followed by K, Ca and Mg, respectively while Fe was the highest microelement followed by Cu, Mn and Zn, respectively. The phytochemical composition revealed that methanolic extract of F. creticus was the richest in total alkaloids and flavonoids, while F. arabica found to be the richest in total phenolics and tannins.
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The use of drainage water in the irrigation of agroecosystem is associated with environmental hazards, and can pose threats to human health. Nine heavy metals (Fe, Mn, Zn, Cu, Co, Cr, Ni, Cd and Pb) along three main drains in the middle... more
The use of drainage water in the irrigation of agroecosystem is associated with environmental hazards, and can pose threats to human health. Nine heavy metals (Fe, Mn, Zn, Cu, Co, Cr, Ni, Cd and Pb) along three main drains in the middle Nile Delta were measures in the sediments, roots and shoots of three common macrophytes (Echinochloa stagnina, Phragmites australis and Typha domingensis). The physicochemical characteristics, as well as the enrichment factor (Ef), contamination factor (Cf), geoaccumulation index (Igeo), ecological risk factor (Er), degree of contamination (Dc) and potential ecological risk index (PERI), were determined for sediment. The metal bioaccumulation factor (BAF) and translocation factor (TF) were assessed for plants. Data revealed high contents of Cr, Zn and Cd in the upstream of the drains, while Mn, Cu and Ni were recorded in high concentrations in the downstream. Mn, Cr, Co, Cu, Ni and Zn were recorded to be within EU (2002), CSQGD (2007) and US EPA (199...
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Geophytes are plants with underground storage organs including bulbs, corms, tubers, and rhizomes, often physiologically active and able to survive during harsh environmental conditions. This study is conducted to assess the nutritive... more
Geophytes are plants with underground storage organs including bulbs, corms, tubers, and rhizomes, often physiologically active and able to survive during harsh environmental conditions. This study is conducted to assess the nutritive value, mineral composition, bioactive metabolites, and antioxidant activity of five wild geophytes (Cyperus capitatus, C. conglomeratus, Elymus farctus, Lasiurus scindicus, and Panicum turgidum) collected from the Nile Delta coast and inland desert. The proximate composition including dry matter, moisture content, ash content, fiber, fat, protein, sucrose, and glucose were determined. Also, total carbohydrates, total digestible nutrients (TDN), and nutritive values were calculated. Macro- and micro-minerals were also determined in the studied geophytes. Total phenolics, total flavonoids, alkaloids, saponins, and tannins were determined. Antioxidant activity was evaluated based on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicle scavenging. Based on the nut...
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Environmental pollution is the most serious problem that affects crop productivity worldwide. Pisum sativum is a leguminous plant that is cultivated on a large scale in the Nile Delta of Egypt as a winter crop, and many of the cultivated... more
Environmental pollution is the most serious problem that affects crop productivity worldwide. Pisum sativum is a leguminous plant that is cultivated on a large scale in the Nile Delta of Egypt as a winter crop, and many of the cultivated fields irrigated with drainage water that contained many pollutants including heavy metals. The present research aimed to investigate the impact of Cd and Ni on the biochemical and physiological processes in P. sativum and evaluate the potential alleviation of their toxicity by 5-aminolevulinic acid (ALA). Seedlings of P. sativum were grown in Hoagland solution treated with CdCl2 or NiCl2 for 72 h in the growth chamber. Hydrogen peroxide, lipid peroxidation, protein carbonylation, reduced glutathione, oxidized glutathione, proline, phenolics, antioxidant enzymes, as well as Cd and Ni concentrations were measured at 0, 12, 24, 36, 48, 72 h. An experiment of alleviation was conducted where ALA was added to the growth solution at a concentration of 200...
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The variation in habitat has a direct effect on the plants and as a consequence, changes their content of the bioactive constituents and biological activities. The present study aimed to explore the variation in the essential oils (EOs)... more
The variation in habitat has a direct effect on the plants and as a consequence, changes their content of the bioactive constituents and biological activities. The present study aimed to explore the variation in the essential oils (EOs) and phenolics of Heliotropium curassavicum collected from the coastal and inland habitats. Additionally, we determined their antioxidant and allelopathic activity against the weed, Chenopodium murale. Fifty-six compounds were identified as overall from EOs, from which 25 components were identified from the coastal sample, and 52 from the inland one. Sesquiterpenes were the main class in both samples (81.67% and 79.28%), while mono (3.99% and 7.21%) and diterpenes (2.9% and 1.77%) represented minors, respectively. Hexahydrofarnesyl acetone, (-)-caryophyllene oxide, farnesyl acetone, humulene oxide, farnesyl acetone C, and nerolidol epoxy acetate were identified as major compounds. The HPLC analysis of MeOH extracts of the two samples showed that chlor...
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Artemisia judaica L. (Shih Balady, family Asteraceae), is a medicinal plant that grows in the desert, commonly used as tea by population in Egypt Sinai and of Saudi Arabia. The present study aims to evaluate antimicrobial and antioxidant... more
Artemisia judaica L. (Shih Balady, family Asteraceae), is a medicinal plant that grows in the desert, commonly used as tea by population in Egypt Sinai and of Saudi Arabia. The present study aims to evaluate antimicrobial and antioxidant activities of aerial parts of A. judaica collected from the inland desert (Wadi Hagoul) of Egypt. Total phenolics, tannins, alkaloids, flavonoids, and saponins were measured in the plant of interest. According to the reduction of DPPH the anti-oxidant activity was measured. Different extracts of A. judaica were screened for their antimicrobial activity against nine pathogenic microorganisms using filter paper disc assay. The secondary metabolites of A. judaica were examined and proved that it was rich in tannins and phenolics (13.29 and 7.62 mg/g dw). The IC50 values of A. judaica extract was 1.78 mg.ml-1 compared to standard catechol (0.15 mg.ml-1). In the present study, the extracts of A. judaica showed unusual activity depending on the type of b...
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A new neolignan, paniculignan (1), and a known lignan, tetracentronside B (2), were isolated from Panicum turgidum. The structure of 1 was elucidated by extensive spectroscopic methods including ID and 2D NMR and HR-ESI-MS. The relative... more
A new neolignan, paniculignan (1), and a known lignan, tetracentronside B (2), were isolated from Panicum turgidum. The structure of 1 was elucidated by extensive spectroscopic methods including ID and 2D NMR and HR-ESI-MS. The relative configuration of 1 was determined on the basis of circular dichroism spetroscopy, optical rotation, and NOESY correlations.
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The anatomical structure of plants is largely varied according to genetics as well as the environmental conditions. The present study aims to describe the anatomical features of three species of family Poaceae growing naturally in canal... more
The anatomical structure of plants is largely varied according to genetics as well as the environmental conditions. The present study aims to describe the anatomical features of three species of family Poaceae growing naturally in canal bank habitat namely: Arundo donax, Pennisetum setaceum and Saccharum spontaneum. These plants are referred as medicinal, grazing or fiber producing plants. Samples were obtained from the canal banks in Nile delta of Egypt. The samples were fixed in formalin-aceto-alcohol and cross sections were prepared, examined using full automatic Olympus microscope and photographed at different power. In the present study, regarding leaves, the general appearance of the leaves sections showed either flat or V-shaped blade. The leaf blades of the three plants show a typical monocot organization. The mesophyll cells showed no distinct differentiation into palisade or spongy tissue. In P. setaceum and S. spontaneum, the leaves have distinct bulliform cells which ena...
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The genus Cyperus is a large genus with about 600 species, widespread all over the world. The present work contains anatomical descriptions of culms and leaves anatomy of three taxa of Cyprus spp. (Cyperus alopecuroides, C. articulates... more
The genus Cyperus is a large genus with about 600 species, widespread all over the world. The present work contains anatomical descriptions of culms and leaves anatomy of three taxa of Cyprus spp. (Cyperus alopecuroides, C. articulates and C. papyrus). Cyperus spp. were collected from canal banks of Nile Delta. The culms in transverse section of all examined species were triangular except for C. articulates which was circular. The ground tissue differentiated into parenchyma cells with thin walls and small, triangular intercellular spaces, while C. articulates has large hollow pith. Vascular bundles are small, angular and scattered throughout the thin-walled ground tissue. Leaf anatomy of C. alopecuroides and C. papyrus is an example of the isobilateral mesophyll with palisade parenchyma on both sides, enlarged epidermal cells referred to as hing cells found in the middle of the blade. The center of the leaf is occupied by a large vascular bundle surrounded by a bundle sheath.
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Kitchener drain is one of the largest drains in Nile Delta. It discharges water directly into Mediterranean Sea water affecting on the marine environment. Local population uses its water in irrigation and agriculture field along this... more
Kitchener drain is one of the largest drains in Nile Delta. It discharges water directly into Mediterranean Sea water affecting on the marine environment. Local population uses its water in irrigation and agriculture field along this drain. So it’s important to determine heavy metal content of agricultural soils used this water in irrigation process and assess the hazard and cancer risk on human health living in these areas. Six metals (Fe, Cd, Pb, Ni, Cr and Co) in total and available form were determined in eight geo-referenced soil samples. The order of these metals in soil was as follow; Ni > Cr > Fe > Pb > Cd > Co. The order of these metals in the available form take the sequence of; Fe > Ni > Pb > Cr > Cd > Co. All mean concentrations of metals were exceeding the standard limits of EU, CSQG and AUEC except for cobalt. Mean values of enrichment factors of metals give an indication that the sources of these metals in the environment were from anthr...
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The construction of highways promotes several changes in the roadside habitat, vegetation, and plant invasion. The present study aimed to describe the plant communities-environment interactions of the international coastal highway from... more
The construction of highways promotes several changes in the roadside habitat, vegetation, and plant invasion. The present study aimed to describe the plant communities-environment interactions of the international coastal highway from Port-Said to Abu-Qir, northern Nile delta coast of Egypt. A total of 146 species (83 annuals, 4 biennials, and 59 perennials), belonging to 116 genera and 33 families were recorded in 80 stands. The Mediterranean chorotype is the most represented. The cluster analysis of stands yielded four communities. The community I was dominated by Silybum mariannum, community II was dominated by Mesembryanthemum crystalinum, Community III is the largest one and was co-dominated by Hordeum murinum and Senecio glaucus and community IV was co-dominated by Cakile maritima and S. glaucus. Diversity indices showed more richness of communities II and more evenness of community IV. Electric conductivity, porosity, soil texture, Na+, Cl- and bicarbonate showed significant...
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Burullus Lagoon is one of the five Mediterranean Lagoons of Egypt which used for many purposes including fishing, recreation and contains many organisms. This investigation was aimed to assess the variation pattern in trace metals... more
Burullus Lagoon is one of the five Mediterranean Lagoons of Egypt which used for many purposes including fishing, recreation and contains many organisms. This investigation was aimed to assess the variation pattern in trace metals contamination in different sectors of Burullus Lagoon. Number of 34 representative water samples were collected and analyzed for 7 trace elements according to the standard method. Spatial distribution maps for these metals were created using ordinary Kriging method in ArcGIS. The obtained results indicated that the dissolved heavy metals in Burullus Lagoon were in the range of; Fe (10.55-48.6 µg/l), Pb (2.62-10.76 µg/l), Cu (0.80-48.21 µg/l), Zn (1.65-29.9 µg/l), Co (2.26-7.74 µg/l), Cr (nd-0.82 µg/l) and Cd (nd-9.91 µg/l). The Lagoon is receiving huge amounts of drainage water at the southern parts in comparison to the northern parts. It was also showed that, the highest mean concentrations of most dissolved trace metals take the following sequence: Weste...
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Three new bidesmosidic cholestane-type steroidal glycosides, 16-O-β-d-glucopyranosyl-cholest-5-en-3β,16β-diol-22-one-3-O-α-l-rhamnopyranosyl-(1→2)-O-[(β-d-glucopyranosyl(1→4)]-O-β-d-glucopyranoside (1),... more
Three new bidesmosidic cholestane-type steroidal glycosides, 16-O-β-d-glucopyranosyl-cholest-5-en-3β,16β-diol-22-one-3-O-α-l-rhamnopyranosyl-(1→2)-O-[(β-d-glucopyranosyl(1→4)]-O-β-d-glucopyranoside (1), 16-O-β-d-glucopyranosylcholest-5-en-3β,16β-diol-22-one-3-O-α-l-rhamnopyranosyl-(1→2)-O-β-d-glucopyranoside (2), and 16-O-β-d-glucopyranosylcholestan-3β,16β-diol-6,22-dione-3-O-α-l-rhamnopyranosyl-(1→2)-O-β-d-glucopyranoside (3) were isolated from a methanolic extract of Panicum turgidum. In addition four known compounds, pennogenin 3β-O-α-l-rhamnopyranosyl-(1→2)-O-[α-l-rhamnopyranosyl-(1→4)-O-α-l-rhamnopyranosyl-(1→4)]-O-β-d-glucopyranoside (4), yamogenin 3β-O-α-l-rhamnopyranosyl-(1→2)-O-[α-l-rhamnopyranosyl-(1→4)]-O-β-d-glucopyranoside (5), yamogenin 3β-O-α-l-rhamnopyranosyl-(1→2)-O-[α-l-rhamnopyranosyl-(1→4)-O-α-l-rhamnopyranosyl-(1→4)]-O-β-d-glucopyranoside (6), and pennogenin 3β-O-α-l-rhamnopyranosyl-(1→2)-O-[α-l-rhamnopyranosyl-(1→4)]-O-β-d-glucopyranoside (7) were also isolated...
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The Egyptian northern Deltaic lakes including Burullus Lake suffer from pollution of intensive agri culture, domestic and industrial activities. The objective of this research was to evaluate water and sediment quality in Burullus Lake... more
The Egyptian northern Deltaic lakes including Burullus Lake suffer from pollution of intensive agri culture, domestic and industrial activities. The objective of this research was to evaluate water and sediment quality in Burullus Lake based on certain physical and chemical characteristics. Mapping the spatial distribution of these parameters will be done using ordinary Kriging method to reveal the link with potential pollution sources. Geo-referenced water and sediments samples were collected from 34 and 37 representative sites in the lake, respectively. The obtained results indicated that the quality of both water and sediments in receiving drainage water of the southern parts of the lake were relatively inferior compared to that of the northern parts. So we recommended that wastewater from different drains should be treated before being drained into the Lake.
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Lacustrine systems are very complex water systems in terms of transport and interaction of heavy metals. Primarily, due to its high variability and current chemical parameters, macrophytes? tissue is a more plausible bio-indicator of the... more
Lacustrine systems are very complex water systems in terms of transport and interaction of heavy metals. Primarily, due to its high variability and current chemical parameters, macrophytes? tissue is a more plausible bio-indicator of the level load of metals within lake ecosystems than water or sediment analyses are. The macrophyte, Ceratophyllum demersum, sampled from Skadar Lake in Montenegro has been used as a bio-indicator. Sediments, water and plants were examined on the contents of ten metals in four different periods in 2011. The concentrations of the metals followed the trend: sediment > leaf C. demersum > stem C. demersum > water. There are differences in the sequences of the metal content in the plant compared to the sequences of their bioaccumulation (BCF) ability. This difference suggests a different capacity of macrophytes for certain metals. BCF for Mn is several times higher compared to other metals. The highest ratio of leaf/stem concentrations was recorded ...
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The present study provides a vegetation analysis and species distribution at 50 sites, emphasizing the environmental factors that affect species distribution. A total of 74 plant species belonging to 67 genera and related to 23 families... more
The present study provides a vegetation analysis and species distribution at 50 sites, emphasizing the environmental factors that affect species distribution. A total of 74 plant species belonging to 67 genera and related to 23 families of vascular plants are recorded. Asteraceae, Poaceae, Chenopodiaceae, Brassicaceae, Fabaceae and Zygophyllaceae are the largest families, and therophytes (41.89) and chamaephytes (24.32%) are the most frequent, indicating a typical desert life-form spectrum. Chorological analysis revealed that 25 of the studied species were Mediterranean taxa, Saharo-Sindian chorotypes, either pure or penetrated into other regions, comprised 47 species. After application of the TWINSPAN and DCA programs, 4 vegetation groups (A-D) were identified, groups A and B were dominated by Achillea santolina, group C was codominated by Zygophyllm coccinum and Launaea spinosa and group D was dominated by Leptadenia pyrotechnica. Groups A and B may represent the vegetation types of the Western Mediterranean coast of Egypt, while groups C and D may represent the Wadi Hagul. The linear correlation of soil variables with the importance values of some dominant species and the application of Canonical Correspondence Analysis (CCA-biplot) indicates significant associations between the floristic composition of the studied area and the edaphic factors such as electrical conductivity, pH, calcium carbonate, sulphates,
bicarbonate, cations (Na+, K+, Ca++ and Mg++) and PAR.
bicarbonate, cations (Na+, K+, Ca++ and Mg++) and PAR.
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The present work provides an ecological study on the hydrophytic vegetation in the irrigation and drainage system of the River Nile in Egypt. Eighty sampled stands were selected in the study area representing various water ways, namely,... more
The present work provides an ecological study on the hydrophytic vegetation in the irrigation and drainage system of the River Nile in Egypt. Eighty sampled stands were selected in the study area representing various water ways, namely, drainage canals, irrigation canals, northern lakes (Manzala, Borollus and Idku), Damietta branch, Rosetta branch and main stream of the River Nile. Vegetation, sediment and water were analyzed in the sampled stands. The application of TWINSPAN classification on the importance values of 70 plant species recorded in 80 sampled stands led to recognition of six vegetation groups dominated by Phragmites australis, Eichhornia crassipes, Typha domingensis, Arthrocnemum macrostachyum and Echinochloa stagnina. The application of Canonical Correspondence Analysis indicated that, the effective sediment and water variables which significantly correlated with the distribution and abundance of the identified vegetation groups include soil texture, water-holding capacity, electrical conductivity, calcium carbonate, chloride, sulphate, sodium, potassium, calcium and magnesium cations. The vegetation groups in the present work are classified into two main categories: the first category represents the northern lakes Manzala, Borollus and Idku and the second category represents the irrigation and drainage canals, Damietta branch, Rosetta branch and the main River Nile stream.
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The present study provides an investigation of the floristic features, including distribution of plant species, life-span, life-form spectra and floristic analysis of the plant life in the canal bank habitats of Egypt. The total number of... more
The present study provides an investigation of the floristic features, including distribution of plant species, life-span, life-form spectra and floristic analysis of the plant life in the canal bank habitats of Egypt. The total number of the recorded plant species surveyed in the study area is 115 species belonging to 90 genera and related to 29 families. These species are classified into three major groups according to their duration (life - span) as follows: 58 perennials, 4 biennials and 53 annuals. The main families are: Gramineae, Compositae, Chenopodiaceae and Cyperaceae. The recorded species are grouped under five types of life forms as follows: therophytes, cryptophytes (comprising geophytes, helophytes and hydrophytes), hemicryptophytes, chamaephytes and nanophanerophytes. Out of the recorded species 49 taxa (about 42.61 % of the total number) are Mediterranean which are either Pluriregional, Biregional or Monoregional. The remaining 58 species (about 50.44 % of the total number) are Cosmopolitan (17.39 %), Pantropical (16.52 %), Palaeotropical
(12.17 %) and Neotropical (4.35 %).
(12.17 %) and Neotropical (4.35 %).
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Wild plants play an essential role in non-traditional fodder producing plants. The aim of the study is to evaluate nutritional composition of wild plants. These plants are Calligonum polygonoides, Cakile maritima, Senecio glaucu... more
Wild plants play an essential role in non-traditional fodder producing plants. The aim of the study is to evaluate nutritional composition of wild plants. These plants are Calligonum polygonoides, Cakile maritima, Senecio glaucu (Psammophytes) and Zygophullum album (halophyte) naturally
growing in Deltaic Mediterranean coastal desert of Egypt. These plants are rich with their nutritive values and their water requirements are low. The protein content of the investigated wild species ranges from 5.90% to 19.63% and the fat content ranges from 0.75% to 1.93%. The amount of nitrogen and phosphorus are higher in all plants followed by potassium, calcium, magnesium and sodium. On the other hand, the microelements levels in the studied wild plants exist as Fe > Mn > Zn > Cu > Ni ˃ Pb > Co ˃ Cd. Finally, the phytochemical analysis of the studied wild plants indicates that the four wild plants are important and there is a need to develop new techniques for cultivation as well as processing of such plants for future use.
growing in Deltaic Mediterranean coastal desert of Egypt. These plants are rich with their nutritive values and their water requirements are low. The protein content of the investigated wild species ranges from 5.90% to 19.63% and the fat content ranges from 0.75% to 1.93%. The amount of nitrogen and phosphorus are higher in all plants followed by potassium, calcium, magnesium and sodium. On the other hand, the microelements levels in the studied wild plants exist as Fe > Mn > Zn > Cu > Ni ˃ Pb > Co ˃ Cd. Finally, the phytochemical analysis of the studied wild plants indicates that the four wild plants are important and there is a need to develop new techniques for cultivation as well as processing of such plants for future use.
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The present investigation provides a detailed study of the ecological features of two species of genus Rumex, namely Rumex dentatus L. and Rumex pictus Forssk. in the coastal and inland areas in North of the Nile Delta. The total number... more
The present investigation provides a detailed study of the ecological features of two species of genus Rumex, namely Rumex dentatus L. and Rumex pictus Forssk. in the coastal and inland areas in North of the Nile Delta. The total number of the recorded species in the study area was 143 species belonging to 117 genera and related to 36 families. The application of TWINSPAN classification on the importance values of the recorded species in 100 sampled stands led to the recognition of 4 vegetation groups named after their dominant species. Groups (A) and (B) were dominant by Rumex pictus in the coastal areas, while groups (C) and (D) were dominated by Rumex dentatus in the inland areas. The application of Canonical Correspondence Analysis (CCA-biplot) between the vegetation groups and soil variables indicated that, water holding capacity, soil texture, organic carbon content, electrical conductivity, soil porosity, total phosphorus and total nitrogen were the most effective edaphic factors controlling the distribution and abundance of the identified vegetation groups in the different habitats in the study area. The obtained results will be useful for the agricultural application this important medicinal species in the new reclaimed lands of the Nile Delta.
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The pollen grains of forty species of the aquatic flowering plants (6 floating, 6 submerged and 28 emergent species) naturally growing in the four coastal Mediterranean lakes of Egypt were investigated during JanuaryeAugust 2012. These... more
The pollen grains of forty species of the aquatic flowering plants (6 floating, 6 submerged and 28 emergent species) naturally growing in the four coastal Mediterranean lakes of
Egypt were investigated during JanuaryeAugust 2012. These species belong to 17 families. Morphologically, the investigated pollen grains are mostly prolate-spheroidal, spheroidal or triangular, rarely prolate or elongated, tectum psilate, granulate, reticulate or microechinate. On the basis of aperture types pollen grains of most families are grouped under three distinct types, namely colporate, colpate and porate. On the other hand, pollen grains of some families e.g. Cyperaceae, Juncaceae, Potamogetonaceae and Ruppiaceae are inaperturate. It is worth to stating that from a phylogenetic and evolutionary point of views, polarity, symmetry, apertural types and exine sculpturing are the most important characters
to differentiate between the different pollen types. The identified pollen grains, conserved in the herbarium of Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt, as reference key pollen in the northern lakes for palynologists, ecologists, taxonomists etc.
Egypt were investigated during JanuaryeAugust 2012. These species belong to 17 families. Morphologically, the investigated pollen grains are mostly prolate-spheroidal, spheroidal or triangular, rarely prolate or elongated, tectum psilate, granulate, reticulate or microechinate. On the basis of aperture types pollen grains of most families are grouped under three distinct types, namely colporate, colpate and porate. On the other hand, pollen grains of some families e.g. Cyperaceae, Juncaceae, Potamogetonaceae and Ruppiaceae are inaperturate. It is worth to stating that from a phylogenetic and evolutionary point of views, polarity, symmetry, apertural types and exine sculpturing are the most important characters
to differentiate between the different pollen types. The identified pollen grains, conserved in the herbarium of Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt, as reference key pollen in the northern lakes for palynologists, ecologists, taxonomists etc.
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The present study provides an investigation of the floristic features, including list of plant species, life-span, life-form spectra and floristic analysis of the plant life associated with five spiny leaved species namely, Atractylis... more
The present study provides an investigation of the floristic features, including list of plant species, life-span, life-form spectra and floristic analysis of the plant life associated with five spiny leaved species namely, Atractylis carduus, Carduus getulus, Carduus pycnocephalus, Carthamus tenuis and Echinops spinosus in family Asteraceae in the Deltaic Mediterranean coast of Egypt. This study also aims at recording the floristic structure to be used in measurement of plant diversity and ecological conservation plan of the study area in future. The total number of the recorded plant species surveyed in the study area was 124 species belonging to 105 genera and related to 32 families. These species are classified into three major groups according to their duration (life-span) as follows: 57 perennials, 3 biennials and 64 annuals. The main families are: Asteraceae, Poaceae, Fabaceae and Chenopodiaceae. The recorded species are also grouped under six types of life forms as follows: therophytes, cryptophyt(comprising geophytes and helophytes), hemicryptophytes, chamaephytes, phanerophytes and parasites. Out of the recorded species 80 taxa (about 64.52 % of the total number) are Mediterranean which are either Pluriregional, Biregional or Monoregional. Eighteen species (about 14.52 % of the total number) are Cosmopolitan (9.68%), Pantropical (0.81%), Palaeotropical(1.61%) and Neotropical (2.42%) and fourteen species (about 11.29%) are belonging to Monoregional Saharo-Sindian.
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The present study provides an investigation of the floristic features, including list of plant species, life-span, life-form spectra and floristic analysis of the plant life in the northern part of the Eastern Desert of Egypt. This study... more
The present study provides an investigation of the floristic features, including list of plant species, life-span, life-form spectra and floristic analysis of the plant life in the northern part of the Eastern Desert of Egypt. This study also aims to investigate the floristic structure to be used in measurement of plant diversity and ecological conservation plan of the study area in future. The total number of the recorded plant species surveyed in the study area was 95 species belonging to 81 genera and related to 26 families. These species were classified into three major groups according to their duration (life-span) as follows: 57 perennials, 2 biennials and 36 annuals. The main families were: Asteraceae, Poaceae, Brassicaceae, Chenopodiaceae and Fabaceae. The recorded species were also grouped under six types of life forms as follows: therophytes, geophytes, helophytes, hemicryptophytes, chamaephytes and nanophanerophyes. Out of the recorded species 28 taxa (about 29.47 % of the total number of recorded species) were Mediterranean taxa, which either Pluriregional (10 species =10.53 %), Biregional (15 species =15.79 %) or Monoregional (3 species = 3.16 %). It has been also found that, 7 species or about 7.37 % of the total number of the recorded species were Cosmopolitan (5.26%) and Neotropical (2.11%).
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In Egypt, Echinocloa crus-galli is one of the most successful yield-limiting weeds in the rice fields that its control mostly relies on herbicides. Plant species Nauplius graveolens, Picris asplenioides, Reichardia tingitana and... more
In Egypt, Echinocloa crus-galli is one of the most successful yield-limiting weeds in the rice fields that its control mostly relies on herbicides. Plant species Nauplius graveolens, Picris asplenioides, Reichardia tingitana and Urospermum picroides were collected from naturally growing population in coastal (Deltaic Mediterreanean coast) and inland desert Wadi Hagul of
Egypt. The phytochemical analysis of the selected species in the present study showed that, they contain relatively high contents of tannins, saponins, flavonoids, alkaloids and phenols. At 500 μg/ml the scavenging activity of Nauplius graveolens, Picris asplenioides, Reichardia tingitana and Urospermum picroides extracts were 14.3%, 6.25%, 7.73% and 4.14, respectively. The allelopathic effect of the extracts from the different tested plant species exhibited reduction of Echinochloa crus-galli seed germination. Also, the allelopathic activities of different extracts of the four species significantly inhibited shoot and root growth of Echinochloa crus-galli at both low and high concentrations.
Egypt. The phytochemical analysis of the selected species in the present study showed that, they contain relatively high contents of tannins, saponins, flavonoids, alkaloids and phenols. At 500 μg/ml the scavenging activity of Nauplius graveolens, Picris asplenioides, Reichardia tingitana and Urospermum picroides extracts were 14.3%, 6.25%, 7.73% and 4.14, respectively. The allelopathic effect of the extracts from the different tested plant species exhibited reduction of Echinochloa crus-galli seed germination. Also, the allelopathic activities of different extracts of the four species significantly inhibited shoot and root growth of Echinochloa crus-galli at both low and high concentrations.
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Damietta Branch; one of the two main branches of the River Nile has a length of about 242 km with an average width of 200 m and depth varying between 12 and 20 m. It receives polluted waters from different sources including industrial,... more
Damietta Branch; one of the two main branches of the River Nile has a length of about 242 km with an average width of 200 m and depth varying between 12 and 20 m. It receives polluted waters from different sources including industrial, agricultural and urban sewage that are causing serious environmental impacts on its vegetation and freshwater. The total number of plant species in the study area is 70, belonging to 54 genera and related to 30 families. These species can be classified ecologically into four major groups, three submerged hydrophytes, six floating hydrophytes, seventeen emergent species and 44 canal bank species. On the basis of duration, the recorded 70 species are grouped into two categories: perennials (46 species) and annuals (24 species). Hydrosoil and water variables which significantly correlated with the abundance and distribution of vegetation groups are soil texture (sand and silt), water-holding capacity, electrical conductivity, soluble anions (chloride and sulphate), total phosphorus and extractable cations (sodium, calcium and magnesium). The successive changes of the macrophytic plant vegetation in the Damietta Branch are frequently results from human activities which are causing considerable change in the hydrosoil and water chemistry, factors linked with species changes.
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Three species growing naturally in Deltaic Mediterranean coast were selected to evaluate their fodder potentialities. These species are Atriplex halimus L., Limonium pruinosum (L.) Chaz., Limoniastrum monopetalum (L.) Boiss.Their moisture... more
Three species growing naturally in Deltaic Mediterranean coast were selected to evaluate their fodder potentialities. These species are Atriplex halimus L., Limonium pruinosum (L.) Chaz., Limoniastrum monopetalum (L.) Boiss.Their moisture content, total ash, crude fiber, total lipid, crude protein, glucose, sucrose, total soluble sugars, polysaccharides, total digestable nutrients and nutritive value together with some macro and micro- elements were estimated. The highest value of crude lipid was determined in Limoniastrum monopetalum (1.16%), while the highest crude protein was recorded in Atriplex halimus (14.79%). The carbohydrate contents (glucose, sucrose and polysaccharides) of Atriplex halimus are, relatively, the highest. The elementary analysis of ash content of the three studied species indicated that sodium, potassium, calcium and magnesium were the main cations detected. Regarding the amounts of the organic secondary compounds estimated in the three studied species,the concentrations of saponins were relatively the highest followed by those of phenols and then tannins. The lower concentrations were those of flavonoids and alkaloid for Atriplex, Limoniastrum and Limonium, respectively. These results revealed that the three studied halophytes are promising as fodder producing halophytes, while Atriplex halimu sseems to be the best.
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Silver nano particles (AgNPs) was synthesized using extract of Senecio glaucus extraxt. The effect of extract source on the shape of the Ag nanoparticles and antibacterial activity are investigated. The nature of AgNPs synthesized was... more
Silver nano particles (AgNPs) was synthesized using extract of Senecio glaucus extraxt. The effect of extract source on the shape of the Ag nanoparticles and antibacterial activity are investigated. The nature of AgNPs synthesized was analyzed by UV–vis spectroscopy and transmission electron microscope(TEM). Silver nanoparticles were found to have an average size of 15-20 nm and mostly spherical. The antibacterial potential of modified extract containing synthesized AgNPs was compared with that of pure extract by cup plate method. Antibacterial activity of modified plant extract was reported and evaluated against drug resistant of bacterial isolates. Modified shoot extract gives higher response than that of modified root extract which facilitate them as a good alternative therapeutic approach in future. Phytochemical analysis revealed that Senecio glaucus extract act as reducing and stabilizing agent for synthesized silver nanoparticles (AgNPs).
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The present investigation aims to study the ecological behaviour of Senecio glaucusin the Deltaic Mediterranean CoastLand of Egypt.Vegetation and soil were sampled in 90 stands representing different habitats in the northern region of the... more
The present investigation aims to study the ecological behaviour of Senecio glaucusin the Deltaic Mediterranean CoastLand of Egypt.Vegetation and soil were sampled in 90 stands representing different habitats in the northern region of the Nile Delta where Senecio glaucus grown. Two Way Indicator Species Analysis (TWINSPAN) classified the vegetation into four groups. Each group occupied a distinct type of habitats. Senecio glaucus is assigned as codominant or indicator species in most of these groups. Ordination of stands, based on importance values of species and effects of edaphic factor on the spatial distribution of plants, were investigated by Canonical Correspondence Analysis (CCA). Distribution and abundance of Senecio glaucus were found to be highly correlated with edaphic factors. Water-holding capacity, clay,pH, available nitrogen, electrical conductivity, sodium adsorption ratio (SAR), magnesium and available phosphorus were the most effective soil factors on the distribution pattern of the survayed plants.