The Experts below are selected from a list of 61377 Experts worldwide ranked by ideXlab platform
I. B. Leshchinskaya - One of the best experts on this subject based on the ideXlab platform.
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Salt Stress induction of glutamyl endopeptidase biosynthesis in Bacillus intermedius.
Microbiological research, 2005Co-Authors: L. A. Gabdrakhmanova, Nelly P. Balaban, Margarita R. Sharipova, Sergey V. Kostrov, Innokentii Vishniakov, I. B. LeshchinskayaAbstract:Summary Bacteria from the genus Bacillus have evolved complicated regulatory networks to be protected from various environmental Stresses, including sudden increase in salinity. Among these regulatory mechanisms is the DegS–DegU signal transduction system, which controls degradative enzyme synthesis and is involved in sensing Salt Stress in Bacillus subtilis . We report the study of biosynthesis regulation of Bacillus intermedius glutamyl endopeptidase under Salt Stress conditions. Salt Stress during growth in medium containing 1–2.5 M NaCl, KCl or disodium succinate leads to the induction of glutamyl endopeptidase. Analysis of the regulatory region of the gene for B. intermedius glutamyl endopeptidase revealed the presence of a tentative target sequence for DegU control, AGATN 10 TTGAG. For the expression of the glutamyl endopeptidase gene, functional DegU protein is required. Thus, we suggest that expression of the gene for B. intermedius glutamyl endopeptidase may be controlled by a regulatory system analogous to DegS–DegU two-component system in B. subtilis .
Sudhakar Bharti - One of the best experts on this subject based on the ideXlab platform.
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chlorophyll a fluorescence study revealing effects of high Salt Stress on photosystem ii in wheat leaves
Plant Physiology and Biochemistry, 2010Co-Authors: Pooja Mehta, Anjana Jajoo, Sonal Mathur, Sudhakar BhartiAbstract:Abstract In order to study the effects of high Salt Stress on PS II in detached wheat ( Triticum aestivum ) leaves, the seedlings were grown in Knop solution and temperature was 20 ± 2 °C. Detached leaves were exposed to high Salt Stress (0.1–0.5 M NaCl) for 1 h in dark and Chl a fluorescence induction kinetics was measured. Various parameters like Fv/Fm, ABS/RC, ETo/TRo, performance index and area over the florescence curve were measured and the energy pipeline model was deduced in response to Salt Stress. Our results show that the damage caused due to high Salt Stress is more prominent at the donor side rather than the acceptor side of PS II. Moreover the effects of high Salt Stress are largely reversible, as the acceptor side damage is completely recovered (∼100%) while the recovery of the donor side is less than 85%. Based on our results we suggest that in response to high Salt Stress, the donor side of PS II is affected more as compared to the acceptor side of PS II.
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chlorophyll a fluorescence study revealing effects of high Salt Stress on photosystem ii in wheat leaves
Plant Physiology and Biochemistry, 2010Co-Authors: Pooja Mehta, Anjana Jajoo, Sonal Mathur, Sudhakar BhartiAbstract:In order to study the effects of high Salt Stress on PS II in detached wheat (Triticum aestivum) leaves, the seedlings were grown in Knop solution and temperature was 20 +/- 2 degrees C. Detached leaves were exposed to high Salt Stress (0.1-0.5 M NaCl) for 1 h in dark and Chl a fluorescence induction kinetics was measured. Various parameters like Fv/Fm, ABS/RC, ETo/TRo, performance index and area over the florescence curve were measured and the energy pipeline model was deduced in response to Salt Stress. Our results show that the damage caused due to high Salt Stress is more prominent at the donor side rather than the acceptor side of PS II. Moreover the effects of high Salt Stress are largely reversible, as the acceptor side damage is completely recovered (approximately 100%) while the recovery of the donor side is less than 85%. Based on our results we suggest that in response to high Salt Stress, the donor side of PS II is affected more as compared to the acceptor side of PS II.
Zhiying Bai - One of the best experts on this subject based on the ideXlab platform.
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exogenous melatonin promotes seed germination and osmotic regulation under Salt Stress in cotton gossypium hirsutum l
PLOS ONE, 2020Co-Authors: Li Chen, Liantao Liu, Dan Jiang, Ke Zhang, Hongchun Sun, Yongjiang Zhang, Zhiying BaiAbstract:Melatonin (MT; N-acetyI-5-methoxytryptamine) is an amine hormone involved in abiotic Stress resistance. Previous studies have confirmed that melatonin can promote seed germination, mediate physiological regulation mechanisms, and stimulate crop growth under Stress. However, the osmotic regulation mechanism by which exogenous melatonin mediates Salt tolerance in cotton is still largely unknown. To investigate the effect of Salt Stress on melatonin concentration in germinating cotton seeds, we analyzed melatonin content over time during seed germination under different treatments. Melatonin content reached its minimum at day 6, while cotton germination rates peaked at day 6, indicating melatonin content and seed germination are correlated. Then we investigated the effects of 10-100 μM melatonin treatments on membrane lipid peroxides and osmotic adjustment substances during cotton seed germination under Salt Stress. Salt Stress led to electrolyte leakage (EL) as well as accumulations of hydrogen peroxide (H2O2), malondialdehyde (MDA), organic osmotic substances (i.e., proline, soluble sugars), and inorganic osmotic substances (i.e., Na+, Cl-). Meanwhile, the contents of melatonin, soluble proteins, and K+ as well as the K+/Na+ balance decreased, indicating that Salt Stress inhibited melatonin synthesis and damaged cellular membranes, seriously affecting seed germination. However, melatonin pretreatment at different concentrations alleviated the adverse effects of Salt Stress on cotton seeds and reduced EL as well as the contents of H2O2, MDA, Na+, and Cl-. The exogenous application of melatonin also promoted melatonin, soluble sugar, soluble proteins, proline, and K+/Na+ contents under Salt Stress. These results demonstrate that supplemental melatonin can effectively ameliorate the repression of cotton seed germination by enhancing osmotic regulating substances and adjusting ion homeostasis under Salt Stress. Thus, melatonin may potentially be used to protect cotton seeds from Salt Stress, with the 20 μM melatonin treatment most effectively promoting cotton seed germination and improving Salt Stress tolerance.
L. A. Gabdrakhmanova - One of the best experts on this subject based on the ideXlab platform.
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Salt Stress induction of glutamyl endopeptidase biosynthesis in Bacillus intermedius.
Microbiological research, 2005Co-Authors: L. A. Gabdrakhmanova, Nelly P. Balaban, Margarita R. Sharipova, Sergey V. Kostrov, Innokentii Vishniakov, I. B. LeshchinskayaAbstract:Summary Bacteria from the genus Bacillus have evolved complicated regulatory networks to be protected from various environmental Stresses, including sudden increase in salinity. Among these regulatory mechanisms is the DegS–DegU signal transduction system, which controls degradative enzyme synthesis and is involved in sensing Salt Stress in Bacillus subtilis . We report the study of biosynthesis regulation of Bacillus intermedius glutamyl endopeptidase under Salt Stress conditions. Salt Stress during growth in medium containing 1–2.5 M NaCl, KCl or disodium succinate leads to the induction of glutamyl endopeptidase. Analysis of the regulatory region of the gene for B. intermedius glutamyl endopeptidase revealed the presence of a tentative target sequence for DegU control, AGATN 10 TTGAG. For the expression of the glutamyl endopeptidase gene, functional DegU protein is required. Thus, we suggest that expression of the gene for B. intermedius glutamyl endopeptidase may be controlled by a regulatory system analogous to DegS–DegU two-component system in B. subtilis .
Pooja Mehta - One of the best experts on this subject based on the ideXlab platform.
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chlorophyll a fluorescence study revealing effects of high Salt Stress on photosystem ii in wheat leaves
Plant Physiology and Biochemistry, 2010Co-Authors: Pooja Mehta, Anjana Jajoo, Sonal Mathur, Sudhakar BhartiAbstract:Abstract In order to study the effects of high Salt Stress on PS II in detached wheat ( Triticum aestivum ) leaves, the seedlings were grown in Knop solution and temperature was 20 ± 2 °C. Detached leaves were exposed to high Salt Stress (0.1–0.5 M NaCl) for 1 h in dark and Chl a fluorescence induction kinetics was measured. Various parameters like Fv/Fm, ABS/RC, ETo/TRo, performance index and area over the florescence curve were measured and the energy pipeline model was deduced in response to Salt Stress. Our results show that the damage caused due to high Salt Stress is more prominent at the donor side rather than the acceptor side of PS II. Moreover the effects of high Salt Stress are largely reversible, as the acceptor side damage is completely recovered (∼100%) while the recovery of the donor side is less than 85%. Based on our results we suggest that in response to high Salt Stress, the donor side of PS II is affected more as compared to the acceptor side of PS II.
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chlorophyll a fluorescence study revealing effects of high Salt Stress on photosystem ii in wheat leaves
Plant Physiology and Biochemistry, 2010Co-Authors: Pooja Mehta, Anjana Jajoo, Sonal Mathur, Sudhakar BhartiAbstract:In order to study the effects of high Salt Stress on PS II in detached wheat (Triticum aestivum) leaves, the seedlings were grown in Knop solution and temperature was 20 +/- 2 degrees C. Detached leaves were exposed to high Salt Stress (0.1-0.5 M NaCl) for 1 h in dark and Chl a fluorescence induction kinetics was measured. Various parameters like Fv/Fm, ABS/RC, ETo/TRo, performance index and area over the florescence curve were measured and the energy pipeline model was deduced in response to Salt Stress. Our results show that the damage caused due to high Salt Stress is more prominent at the donor side rather than the acceptor side of PS II. Moreover the effects of high Salt Stress are largely reversible, as the acceptor side damage is completely recovered (approximately 100%) while the recovery of the donor side is less than 85%. Based on our results we suggest that in response to high Salt Stress, the donor side of PS II is affected more as compared to the acceptor side of PS II.
