The Experts below are selected from a list of 66 Experts worldwide ranked by ideXlab platform
Hamed Eladel - One of the best experts on this subject based on the ideXlab platform.
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effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states
Ecotoxicology and Environmental Safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P<1 increases the inhibitory effect of high doses of the herbicide.
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Chlorophyll a fluorescence and photosynthetic activity as tools for the evaluation of simazine toxicity to Protosiphon botryoides and Anabaena variabilis.
Ecotoxicology and environmental safety, 2001Co-Authors: I. A. Kobbia, Mohamed G. Battah, E.f. Shabana, Hamed EladelAbstract:On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
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Effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states.
Ecotoxicology and environmental safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P
E.f. Shabana - One of the best experts on this subject based on the ideXlab platform.
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effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states
Ecotoxicology and Environmental Safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P<1 increases the inhibitory effect of high doses of the herbicide.
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Chlorophyll a fluorescence and photosynthetic activity as tools for the evaluation of simazine toxicity to Protosiphon botryoides and Anabaena variabilis.
Ecotoxicology and environmental safety, 2001Co-Authors: I. A. Kobbia, Mohamed G. Battah, E.f. Shabana, Hamed EladelAbstract:On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
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Effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states.
Ecotoxicology and environmental safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P
I. A. Kobbia - One of the best experts on this subject based on the ideXlab platform.
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effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states
Ecotoxicology and Environmental Safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P<1 increases the inhibitory effect of high doses of the herbicide.
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Chlorophyll a fluorescence and photosynthetic activity as tools for the evaluation of simazine toxicity to Protosiphon botryoides and Anabaena variabilis.
Ecotoxicology and environmental safety, 2001Co-Authors: I. A. Kobbia, Mohamed G. Battah, E.f. Shabana, Hamed EladelAbstract:On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
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Effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states.
Ecotoxicology and environmental safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P
Mohamed G. Battah - One of the best experts on this subject based on the ideXlab platform.
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effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states
Ecotoxicology and Environmental Safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P<1 increases the inhibitory effect of high doses of the herbicide.
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Chlorophyll a fluorescence and photosynthetic activity as tools for the evaluation of simazine toxicity to Protosiphon botryoides and Anabaena variabilis.
Ecotoxicology and environmental safety, 2001Co-Authors: I. A. Kobbia, Mohamed G. Battah, E.f. Shabana, Hamed EladelAbstract:On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
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Effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states.
Ecotoxicology and environmental safety, 2001Co-Authors: E.f. Shabana, I. A. Kobbia, Mohamed G. Battah, Hamed EladelAbstract:The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P
Francis R. Trainor - One of the best experts on this subject based on the ideXlab platform.
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Survival of Protosiphon botryoides (Chlorophyceae, Chlorophyta) from a Connecticut soil dried for 43 years
Phycologia, 2012Co-Authors: Louise A. Lewis, Francis R. TrainorAbstract:Lewis L.A. and Trainor F.R. 2012. Survival of Protosiphon botryoides (Chlorophyceae, Chlorophyta) from a Connecticut soil dried for 43 years. Phycologia 51: 662–665. DOI: 10.2216/11-108.1 Following a series of long-term studies of algae that survive desiccation, we reported the presence of the green alga Protosiphon botryoides from liquid preparations of soil dried for 43 years and its absence from cultures prepared with soils dried for 50 years. The identity of this alga was verified using phylogenetic analysis of data from the 18S rDNA and rbcL genes. Mechanisms used by green algae to survive long-term desiccation were discussed.
