Papers by Abdulaziz Assaeed
Molecules, Nov 9, 2020
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Biology, Apr 5, 2023
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Plants, Feb 28, 2022
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Arabian Journal of Chemistry, Feb 1, 2020
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Alexandria journal of agricultural research, Oct 20, 2001
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Molecular Biology Reports, Oct 1, 2020
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Saudi Journal of Biological Sciences, Sep 1, 2018
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Annals of Applied Biology, Dec 1, 1990
... One important question raised by such observations is to what extent poor plant performance i... more ... One important question raised by such observations is to what extent poor plant performance in overcompacted soils can be attributed to reduced light interception - or does soil compaction also affect the efficiency of light conversion to dry matter? ...
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Molecules, Feb 7, 2019
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Plants, Dec 25, 2020
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Plants, Dec 26, 2022
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Chemistry & Biodiversity, Jul 9, 2019
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Sustainability, Dec 16, 2022
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Chemistry & Biodiversity, Apr 24, 2019
The genus Euphorbia attracted the attention of many researchers worldwide from natural products, ... more The genus Euphorbia attracted the attention of many researchers worldwide from natural products, bioactivity, and ecological perspective. The essential oils (EOs) of Euphorbia heterophylla are poorly studied. Therefore, the present study aimed to provide a detailed profile of the E. heterophylla EOs as well as to determine their antioxidant and allelopathic activities. The EOs from aerial parts of E. heterophylla were extracted using hydrodistillation and analyzed via GC/MS. The antioxidant activity was determined based on scavenging of the free radical, 1,1‐diphenyl‐2‐picrylhydrazyl and H2O2. Various concentrations of the EOs were tested against the noxious weed, Cenchrus echinatus. Thirty‐five compounds were identified representing 100 % of the total mass. Four classes of components were characterized, among which terpenoids were the main components (88.70 %). Monoterpenes represented the main class (69.48 %), followed by sesquiterpenes (18.63 %), and only one diterpenoid, kaur‐16‐ene, was identified. 1,8‐Cineole (32.03 %), camphor (16.54 %), β‐elemene (5.92 %), endo‐borneol (4.94 %), limonene (4.27 %), pentatriacontane (3.91 %), and α‐pinene (3.89 %) were the major compounds. The EOs composition of Egyptian E. heterophylla ecospecies was comparable to that of other reported Euphorbia species, although it showed no correlation with Nigerian E. heterophylla ecospecies. The EOs from E. heterophylla aerial parts exhibited significant antioxidant activity. Moreover, a concentration of 100 μL L−1 of the EOs reduced the germination, root, and shoot growth of C. echinatus by about 93.95 %, 84.6 %, and 57.8 %, respectively. Therefore, the EOs from E. heterophylla could be integrated into the control of this weed, as eco‐friendly biocontrol method. Further study is needed to characterize their allelopathic activity under field conditions as well as to evaluate their durability and biosafety.
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Ecosphere, Nov 1, 2016
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Separations
Weeds are considered the main reason for crop yield loss in the world. Weed control and managemen... more Weeds are considered the main reason for crop yield loss in the world. Weed control and management include various treatments such as cultural, physical, chemical, and biological methods. Chemical control of weeds is the most common method; however, the application of commercial synthetic herbicides caused several dangerous hazards in the environment including the appearance of resistant weed biotypes. Prosopis farcta (Banks & Sol.) J.F.Macbr. (Family: Fabaceae), is a common weed plant in the Middle East, where it is hard to eliminate due to its deep and overlapped roots. On the other side, it has many traditional uses around the world. Herein, the essential oil (EO) of P. farcta above-ground parts was extracted via hydrodistillation techniques and then analyzed using gas chromatography-mass spectroscopy (GC-MS). From the GC-MS analysis, 47 compounds were identified with a relative concentration of 98.02%, including terpenes as the main components (95.08%). From overall identified c...
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Cutting Edge Research in Biology Vol. 5, Mar 1, 2023
In this chapter, we investigated the status of Arbuscular Mycorrhiza Fungi (AMF) living natural s... more In this chapter, we investigated the status of Arbuscular Mycorrhiza Fungi (AMF) living natural symbiotically with different sizes of the acacia. Regardless of tree species or size, AMF caused varying degrees of root colonisation and infection in Acacia tortilis, Acacia ehrenbergiana, and Acacia gerrardii. A. ehrenbergiana medium size was found to have the highest infection overall at the Raudhat Khuraim site (70%) and was followed by A. tortilis short size (60%), A. gerrardii medium size (58.7%), and short size (57.7%) at the Washlah site. A. gerrardii large size had the lowest infection rate in Khuraim (6%). The maximum vesicles were found in A. tortilis large (95%) followed by A. ehrenbergiana medium (91%) at Khuraim, A. tortilis medium (67.3) at Washlah, A. gerrardii and A. tortilis short size (51.7),(50.0) at Khuraim and Huraymila. The minimum was recorded with A. gerrardii medium (4%) in Khuraim. At Washlah, large size A. torilis had the lowest infection rate (4.7%). In each individual tree, the intensity of infection and spore population varied widely and independently. The medium size A. gerrardii at Washlah had the most spores (230), while the short size A. gerrardii in Khuraim had the fewest (21). In conclusion, our findings show that AMF infection is most common in the roots of short acacia trees, followed by medium-sized trees, and least common in large trees.
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Biological membranes act as barriers or reservoirs for many compounds within the human body. As s... more Biological membranes act as barriers or reservoirs for many compounds within the human body. As such, they play an important role in pharmacokinetics and pharmacodynamics of drugs and other molecular species. Until now, most membrane/drug interactions have been inferred from simple partitioning between octanol and water phases. However, the observed variability among membrane composition and among compounds themselves stretches beyond such simplification as there are multiple drug-membrane interactions. Numerous experimental and theoretical approaches are used to determine the molecule-membrane interactions with variable accuracy, but there is no open resource for their critical comparison. For this reason, we have built Molecules on Membranes Database (MolMeDB), which gathers data about over 2000 compound-membrane interactions including partitioning, penetration, and positioning. The data have been collected from scientific articles published in peer-reviewed journals and complemen...
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Plants belonging to the Artemisia genus (Asteraceae) are widely distributed worldwide and have ma... more Plants belonging to the Artemisia genus (Asteraceae) are widely distributed worldwide and have many ethnopharmacological, traditional, therapeutic, and phytochemical aspects. Artemisia monosperma is an important aromatic plant due to its traditional and therapeutic uses and phytochemical diversity, including essential oils (EOs). The EO chemical profile of aromatic plants has been reported to be affected by exogenous and endogenous factors. Geographic and seasonal variations are crucial factors shaping the chemical composition of the EO. Herein, the variations of the yields, chemical profiles, and allelopathic and antioxidant activities of A. monosperma EOs collected from three regions in four seasons were assessed. A slight variation in the oil yields was observed among regions and seasons, while the chemical profile, characterized via GC-MS, exhibited significant quantitative and qualitative variation among either regions or seasons. Sesquiterpenes were the main components of all ...
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Papers by Abdulaziz Assaeed