Melatonin is an environmentally friendly-molecule with a potent free radical scavenger and antiox... more Melatonin is an environmentally friendly-molecule with a potent free radical scavenger and antioxidant capacity. Two pot experiments were conducted during two successive winter seasons (2011/2012 and 2012/2013) at the wire-house of the National Research Centre, Dokki, Cairo, Egypt to study the potentiality of melatonin (100 mM and 500 mM) in alleviating the harmful effect of diluted sea water at a relatively low and high concentrations (3.85 dS/m and 7.69 dS/m, respectively) on the performance of faba bean plant. The results revealed that irrigation of faba bean plants with diluted sea water reduced growth parameters (plant height, leaves number/plant, fresh and dry weights /plant), relative water content (RWC), photosynthetic pigments (chlorophylls a, b and carotenoids), indole acetic acid, total carbohydrate, K+,Ca+2, as well as the ratios of K+/Na+ and Ca+2/Na+ .Thiswasaccompanied by significant increases in phenolic content, compatible solutes (total soluble carbohydrate, free amino acids, proline), Na+ and Cl- , relative to the control plants (untreated plants). On the other hand, melatonin treatments improved growth parameters, RWC, photosynthetic pigments, total carbohydrate, total phenolic content, indole acetic acid, K+,Ca+2 as well as K+/Na+ and Ca+2/Na+ ratios, either in the plants irrigated with tap water or with diluted sea water, as compared with corresponding controls. Meanwhile, melatonin treatments reduced the levels of compatible solutes, as well as Na+ and Cl- contents, relative to those of corresponding controls. Salinity stress and/ or melatonin treatments induced the production of new protein bands that did not occur in the control plants. Melatonin at 500 mM had a more pronounced effect in alleviating the adverse effects of the two salinity levels under study on the performance of faba bean plants than 100 mM melatonin.
The effect of soaking lupine seeds with phenolic acids (trans-cinnamic acid or benzoic acid at 10... more The effect of soaking lupine seeds with phenolic acids (trans-cinnamic acid or benzoic acid at 10, 20 and 30 mg/l) on growth, photosynthetic pigments content, IAA and phenolic levels, yield and yield components in addition to some nutritional values of the yielded seeds was studied during two successive seasons 2013/2014 and 2014/2015 at the Research and Production Station of National Research Centre, Egypt. All trans-cinnamic acid and benzoic acid treatments promoted most of the studied growth parameters at both vegetative growth stage and flowering stage. These increments of growth parameters were associated with elevated level of photosynthetic pigments, growth promoter auxin in terms of indole acetic acid, and total phenolic contents of the treated plants as compared with untreated plants. All treatments led to marked increases in yield and yield components. Moreover, some chemical constituents as potassium, phosphorus, crude protein, carbohydrate and oil percentages of the yiel...
of ascorbic acid and α tocopherol in alleviating salinity stress on flax plant (Linum usitatissim... more of ascorbic acid and α tocopherol in alleviating salinity stress on flax plant (Linum usitatissimum L.)
Amino acids (bio-stimulants) are considered as cheap and biodegradable chemicals that increased y... more Amino acids (bio-stimulants) are considered as cheap and biodegradable chemicals that increased yield and agronomic performance of several crops. A field experiment was conducted at the experimental station of National Research Centre, Nubaria district El-Behera Governorate-Egypt, during two winter seasons 2017/2018 and 2018/2019. Grains of Misr 3 and Sids 12 cultivars were soaked with proline at 5 or 10 mM for 12 hrs and dried at room temperature before sowing to study the effect of proline treatments on the performance and quality of wheat plants grown under sandy soil conditions. Data show that performance of Misr 3 cv grown under the conditions of sandy soil was more better than Sids 12 cv. Moreover, proline treatments at both concentrations caused significant increases in most parameters measured in this study as plant fresh and dry weight; total photosynthetic pigments; grains weight/fedan. Proline treatment at 5 mM caused the highest significant increase in grains yield and y...
Two pot experiments were conducted during two successive summer seasons of 2010 and 2011 in the g... more Two pot experiments were conducted during two successive summer seasons of 2010 and 2011 in the greenhouse of National Research Centre, Egypt to study the effect of incorporating seeds powder of Eruca sativa and Brassica rapa to the soil at the rate of 0, 25, 50 and 75 g/kg soil on the growth and propagative capacity of purple nutsedge as well as maize plants. At 45 days after sowing (DAS) all concentrations used of both E. sativa and B. rapa minimized to great extent the growth of foliage, underground organs as well as the dry weight of purple nutsedge that reached to complete control at 75 DAS, only with the higher concentrations (50 and 75g/kg soil) of E. sativa . On the other hand, low and middle concentrations used of both E. sativa and B. rapa caused significant increase in all growth characters and total carbohydrate contents of maize comparing to the corresponding controls. Results suggested that both E. sativa and B. rapa seeds powder could be used as a natural selective bi...
Two field experiments were carried out during two successive seasons of 2009/2010 and 2010/2011 a... more Two field experiments were carried out during two successive seasons of 2009/2010 and 2010/2011 at the Agricultural Experimental Station of the National Research Centre at Nubaria, Behaira Governorate, Egypt to investigate the efficiency of a preemergence herbicide (Oxadiargyl) and some postemergence herbicides (Metosulam, Bromoxynil 24%, Tribenuron-methyl, Fluroxypyr, Thifensulfuron, Bromoxynil 22.5%, Florasulom+Flumetsulom) as well as hand hoeing on the chemical composition and yield of onion plant. Oxadiargyl treatment gave the highest decrease in the number and dry weight of broadleaved, grasses and total weeds after 70 and 100 days from transplanting followed by the treatment of two hand hoeing. All herbicidal treatments and hand weeding showed significant increase of yield, bulb dimensions and chemical composition of onion bulbs. Oxadiargyl treatment recorded the highest values of bulb diameter, bulb weight and total bulb yield. Results also indicated that maximum levels of N%...
All over the world, using natural and safety environmental substances is lofty target to improve ... more All over the world, using natural and safety environmental substances is lofty target to improve quality and quantity of plants. Pot experiments were conducted during summer seasons (2011 and 2012) at the greenhouse of the National Research Centre, Dokki, Giza, Egypt to evaluate the effect of exogenous application of methanol at 10, 15, 20 and 25% and bread yeast extract at 1, 2, 3 and 4% on the growth, photosynthetic pigments, yield, yield attributes, nutritive value, antioxidant activity and fatty acids composition of soybean (Glycine max L. cv. Giza 111). The highest significant increase in plant dry weight was recorded at treatment 4% yeast extract being 82.8% over control, whereas, the least increase was 31.7% over control resulted at treatment 25% methanol. Total photosynthetic pigments was significantly increased at 4% yeast extract by 115.3% over control followed by 3% yeast extract and 20% methanol that enhanced the total photosynthetic pigments by the same degree (77.9%). ...
Agricultural Engineering International: The CIGR Journal, 2018
The physiological effect of melatonin, IAA and their precursor (tryptophan) as seed priming on qu... more The physiological effect of melatonin, IAA and their precursor (tryptophan) as seed priming on quantity and quality of chickpea plants was investigated during two growing seasons of 2013/2014 and 2014/2015 under sandy soil conditions at the Research and Production Station, National Research Centre, Nubaria Province, Behaira Governorate, Egypt. Data show that melatonin treatments showed the most pronounced effect on vegetative growth parameters followed by IAA and tryptophan treatments. The highest significant increase in dry weight of shoot/plant was achieved by melatonin treatments at 0.5 and 1.0mM. Moreover, melatonin treatments at 0.25 and 0.5 mM were the most pronounced treatments caused the highest significant increase in total photosynthetic pigments by 52.18% over control. All applied treatments caused significant increases in seed yield/feddan and its attributes (number of pods and seeds/plant as well as 100seeds weight). IAA treatment at 20mg/l and all melatonin treatments ...
Background Two field experiments were carried out at the Agricultural Production and Research Sta... more Background Two field experiments were carried out at the Agricultural Production and Research Station, National Research Centre (NRC), El-Nubaria Province, Behaira Governorate, Egypt, during two successive winter seasons to study the effect of glutathione (100, 200, and 300 mg/l) and/or selenium (5 and 10 mg/l) on growth, yield, and yield components of three wheat cultivars (Egypt-2; Shandaweel-1; Gemmeiza-11). Results The results indicate that the Gemmeiza-11 cultivar was the most adapted cultivar to grow in the Nubaria region. Individually, glutathione at 300 mg/l or selenium at 10 mg/l caused the highest significant increases in shoot dry weight/plant of three wheat cultivars relative to other levels. Likewise, glutathione treatment at 300 mg/l was the optimum treatment in increasing photosynthetic pigments in three wheat cultivars. Selenium treatment at 10 mg/l was better than selenium treatment at 5 mg/l. Interaction between glutathione at 300 mg/l and selenium at 10 mg/l cause...
A field study was set up at Kafre-Hakim village, Giza, Governorate, Egypt, to compare the protect... more A field study was set up at Kafre-Hakim village, Giza, Governorate, Egypt, to compare the protective value of applying environmental friendly compounds with a known chemical nematicide, oxamyl, for controlling the nematode Meloidogyne incognita infecting sunflower cv. Sakha 53 and their effects on crop production and oil contents. These compounds were 1) furfural,a natural nematicide, 2) amino green 11, commercial formula of amino acids, 3) NPK, an inorganic fertilizer. Data revealed that all the tested treatments resulted in variable significant decrease in root knot disease incidence associated with improvement in crop yield except the plants treated with furfural plus amino green 11 that showed a significant decrease in percentage of oil content. A significant decrease in shoot weight was observed by applying the combined treatment of furfural plus NPK. Moreover, oxamyl plus amino green 11 resulted in-12% reductions in shoot weight. From the present study it was concluded that be...
Melatonin is an environmentally friendly-molecule with a potent free radical scavenger and antiox... more Melatonin is an environmentally friendly-molecule with a potent free radical scavenger and antioxidant capacity. Two pot experiments were conducted during two successive winter seasons (2011/2012 and 2012/2013) at the wire-house of the National Research Centre, Dokki, Cairo, Egypt to study the potentiality of melatonin (100 mM and 500 mM) in alleviating the harmful effect of diluted sea water at a relatively low and high concentrations (3.85 dS/m and 7.69 dS/m, respectively) on the performance of faba bean plant. The results revealed that irrigation of faba bean plants with diluted sea water reduced growth parameters (plant height, leaves number/plant, fresh and dry weights /plant), relative water content (RWC), photosynthetic pigments (chlorophylls a, b and carotenoids), indole acetic acid, total carbohydrate, K+,Ca+2, as well as the ratios of K+/Na+ and Ca+2/Na+ .Thiswasaccompanied by significant increases in phenolic content, compatible solutes (total soluble carbohydrate, free amino acids, proline), Na+ and Cl- , relative to the control plants (untreated plants). On the other hand, melatonin treatments improved growth parameters, RWC, photosynthetic pigments, total carbohydrate, total phenolic content, indole acetic acid, K+,Ca+2 as well as K+/Na+ and Ca+2/Na+ ratios, either in the plants irrigated with tap water or with diluted sea water, as compared with corresponding controls. Meanwhile, melatonin treatments reduced the levels of compatible solutes, as well as Na+ and Cl- contents, relative to those of corresponding controls. Salinity stress and/ or melatonin treatments induced the production of new protein bands that did not occur in the control plants. Melatonin at 500 mM had a more pronounced effect in alleviating the adverse effects of the two salinity levels under study on the performance of faba bean plants than 100 mM melatonin.
The effect of soaking lupine seeds with phenolic acids (trans-cinnamic acid or benzoic acid at 10... more The effect of soaking lupine seeds with phenolic acids (trans-cinnamic acid or benzoic acid at 10, 20 and 30 mg/l) on growth, photosynthetic pigments content, IAA and phenolic levels, yield and yield components in addition to some nutritional values of the yielded seeds was studied during two successive seasons 2013/2014 and 2014/2015 at the Research and Production Station of National Research Centre, Egypt. All trans-cinnamic acid and benzoic acid treatments promoted most of the studied growth parameters at both vegetative growth stage and flowering stage. These increments of growth parameters were associated with elevated level of photosynthetic pigments, growth promoter auxin in terms of indole acetic acid, and total phenolic contents of the treated plants as compared with untreated plants. All treatments led to marked increases in yield and yield components. Moreover, some chemical constituents as potassium, phosphorus, crude protein, carbohydrate and oil percentages of the yiel...
of ascorbic acid and α tocopherol in alleviating salinity stress on flax plant (Linum usitatissim... more of ascorbic acid and α tocopherol in alleviating salinity stress on flax plant (Linum usitatissimum L.)
Amino acids (bio-stimulants) are considered as cheap and biodegradable chemicals that increased y... more Amino acids (bio-stimulants) are considered as cheap and biodegradable chemicals that increased yield and agronomic performance of several crops. A field experiment was conducted at the experimental station of National Research Centre, Nubaria district El-Behera Governorate-Egypt, during two winter seasons 2017/2018 and 2018/2019. Grains of Misr 3 and Sids 12 cultivars were soaked with proline at 5 or 10 mM for 12 hrs and dried at room temperature before sowing to study the effect of proline treatments on the performance and quality of wheat plants grown under sandy soil conditions. Data show that performance of Misr 3 cv grown under the conditions of sandy soil was more better than Sids 12 cv. Moreover, proline treatments at both concentrations caused significant increases in most parameters measured in this study as plant fresh and dry weight; total photosynthetic pigments; grains weight/fedan. Proline treatment at 5 mM caused the highest significant increase in grains yield and y...
Two pot experiments were conducted during two successive summer seasons of 2010 and 2011 in the g... more Two pot experiments were conducted during two successive summer seasons of 2010 and 2011 in the greenhouse of National Research Centre, Egypt to study the effect of incorporating seeds powder of Eruca sativa and Brassica rapa to the soil at the rate of 0, 25, 50 and 75 g/kg soil on the growth and propagative capacity of purple nutsedge as well as maize plants. At 45 days after sowing (DAS) all concentrations used of both E. sativa and B. rapa minimized to great extent the growth of foliage, underground organs as well as the dry weight of purple nutsedge that reached to complete control at 75 DAS, only with the higher concentrations (50 and 75g/kg soil) of E. sativa . On the other hand, low and middle concentrations used of both E. sativa and B. rapa caused significant increase in all growth characters and total carbohydrate contents of maize comparing to the corresponding controls. Results suggested that both E. sativa and B. rapa seeds powder could be used as a natural selective bi...
Two field experiments were carried out during two successive seasons of 2009/2010 and 2010/2011 a... more Two field experiments were carried out during two successive seasons of 2009/2010 and 2010/2011 at the Agricultural Experimental Station of the National Research Centre at Nubaria, Behaira Governorate, Egypt to investigate the efficiency of a preemergence herbicide (Oxadiargyl) and some postemergence herbicides (Metosulam, Bromoxynil 24%, Tribenuron-methyl, Fluroxypyr, Thifensulfuron, Bromoxynil 22.5%, Florasulom+Flumetsulom) as well as hand hoeing on the chemical composition and yield of onion plant. Oxadiargyl treatment gave the highest decrease in the number and dry weight of broadleaved, grasses and total weeds after 70 and 100 days from transplanting followed by the treatment of two hand hoeing. All herbicidal treatments and hand weeding showed significant increase of yield, bulb dimensions and chemical composition of onion bulbs. Oxadiargyl treatment recorded the highest values of bulb diameter, bulb weight and total bulb yield. Results also indicated that maximum levels of N%...
All over the world, using natural and safety environmental substances is lofty target to improve ... more All over the world, using natural and safety environmental substances is lofty target to improve quality and quantity of plants. Pot experiments were conducted during summer seasons (2011 and 2012) at the greenhouse of the National Research Centre, Dokki, Giza, Egypt to evaluate the effect of exogenous application of methanol at 10, 15, 20 and 25% and bread yeast extract at 1, 2, 3 and 4% on the growth, photosynthetic pigments, yield, yield attributes, nutritive value, antioxidant activity and fatty acids composition of soybean (Glycine max L. cv. Giza 111). The highest significant increase in plant dry weight was recorded at treatment 4% yeast extract being 82.8% over control, whereas, the least increase was 31.7% over control resulted at treatment 25% methanol. Total photosynthetic pigments was significantly increased at 4% yeast extract by 115.3% over control followed by 3% yeast extract and 20% methanol that enhanced the total photosynthetic pigments by the same degree (77.9%). ...
Agricultural Engineering International: The CIGR Journal, 2018
The physiological effect of melatonin, IAA and their precursor (tryptophan) as seed priming on qu... more The physiological effect of melatonin, IAA and their precursor (tryptophan) as seed priming on quantity and quality of chickpea plants was investigated during two growing seasons of 2013/2014 and 2014/2015 under sandy soil conditions at the Research and Production Station, National Research Centre, Nubaria Province, Behaira Governorate, Egypt. Data show that melatonin treatments showed the most pronounced effect on vegetative growth parameters followed by IAA and tryptophan treatments. The highest significant increase in dry weight of shoot/plant was achieved by melatonin treatments at 0.5 and 1.0mM. Moreover, melatonin treatments at 0.25 and 0.5 mM were the most pronounced treatments caused the highest significant increase in total photosynthetic pigments by 52.18% over control. All applied treatments caused significant increases in seed yield/feddan and its attributes (number of pods and seeds/plant as well as 100seeds weight). IAA treatment at 20mg/l and all melatonin treatments ...
Background Two field experiments were carried out at the Agricultural Production and Research Sta... more Background Two field experiments were carried out at the Agricultural Production and Research Station, National Research Centre (NRC), El-Nubaria Province, Behaira Governorate, Egypt, during two successive winter seasons to study the effect of glutathione (100, 200, and 300 mg/l) and/or selenium (5 and 10 mg/l) on growth, yield, and yield components of three wheat cultivars (Egypt-2; Shandaweel-1; Gemmeiza-11). Results The results indicate that the Gemmeiza-11 cultivar was the most adapted cultivar to grow in the Nubaria region. Individually, glutathione at 300 mg/l or selenium at 10 mg/l caused the highest significant increases in shoot dry weight/plant of three wheat cultivars relative to other levels. Likewise, glutathione treatment at 300 mg/l was the optimum treatment in increasing photosynthetic pigments in three wheat cultivars. Selenium treatment at 10 mg/l was better than selenium treatment at 5 mg/l. Interaction between glutathione at 300 mg/l and selenium at 10 mg/l cause...
A field study was set up at Kafre-Hakim village, Giza, Governorate, Egypt, to compare the protect... more A field study was set up at Kafre-Hakim village, Giza, Governorate, Egypt, to compare the protective value of applying environmental friendly compounds with a known chemical nematicide, oxamyl, for controlling the nematode Meloidogyne incognita infecting sunflower cv. Sakha 53 and their effects on crop production and oil contents. These compounds were 1) furfural,a natural nematicide, 2) amino green 11, commercial formula of amino acids, 3) NPK, an inorganic fertilizer. Data revealed that all the tested treatments resulted in variable significant decrease in root knot disease incidence associated with improvement in crop yield except the plants treated with furfural plus amino green 11 that showed a significant decrease in percentage of oil content. A significant decrease in shoot weight was observed by applying the combined treatment of furfural plus NPK. Moreover, oxamyl plus amino green 11 resulted in-12% reductions in shoot weight. From the present study it was concluded that be...
Two field experiments were conducted during two successive seasons (2014/2015 and 2015/2016) at t... more Two field experiments were conducted during two successive seasons (2014/2015 and 2015/2016) at the Experimental Station of National Research Centre, Nubaria district, Beheira Governorate, Egypt, to study the effect of foliar treatment of quinoa plants with trehalose (Tre) (100 µM and 500 µM) on the growth, photosynthetic pigments, seed yield quantity & quality, in fever of nutritional and antioxidant compounds in the yielded quinoa seeds which subjected to water deficiency (skipping two irrigation times at 50 & 60 days after sowing). Water deficiency caused marked decreases in quinoa plant growth parameters (shoot height, fresh and dry weights of shoot/plant) and photosynthetic pigments with marked increases in root growth parameters (root length, fresh and dry weight of root/plant). Drought stress decreased yield and yield attributes, carbohydrates, protein, nitrogen, phosphorous and potassium contents. Meanwhile, oil percentage, phenolic and flavonoids contents increased by droug...
Uploads
Articles by Mona Dawood
Papers by Mona Dawood