scholarly journals Hydrogen sulfide induces systemic tolerance to salinity and non-ionic osmotic stress in strawberry plants through modification of reactive species biosynthesis and transcriptional regulation of multiple defence pathways

2013 ◽  
Vol 64 (7) ◽  
pp. 1953-1966 ◽  
Author(s):  
Anastasis Christou ◽  
George A. Manganaris ◽  
Ioannis Papadopoulos ◽  
Vasileios Fotopoulos
Keyword(s):  
Transcriptional Regulation ◽  
Hydrogen Sulfide ◽  
Osmotic Stress ◽  
Reactive Species ◽  
Tolerance To Salinity

scholarly journals Involvement of l-Cysteine Desulfhydrase and Hydrogen Sulfide in Glutathione-Induced Tolerance to Salinity by Accelerating Ascorbate-Glutathione Cycle and Glyoxalase System in Capsicum

Antioxidants ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 603
Author(s):  
Cengiz Kaya ◽  
Bernardo Murillo-Amador ◽  
Muhammad Ashraf
Keyword(s):  
Hydrogen Sulfide ◽  
Liquid Solution ◽  
Sweet Pepper ◽  
Monodehydroascorbate Reductase ◽  
Glyoxalase System ◽  
Sodium Hydrosulfide ◽  
Chlorophyll Contents ◽  
Cysteine Desulfhydrase ◽  
Induced Tolerance ◽  
Tolerance To Salinity

The aim of this study is to assess the role of l-cysteine desulfhydrase (l-DES) and endogenous hydrogen sulfide (H2S) in glutathione (GSH)-induced tolerance to salinity stress (SS) in sweet pepper (Capsicum annuum L.). Two weeks after germination, before initiating SS, half of the pepper seedlings were retained for 12 h in a liquid solution containing H2S scavenger, hypotaurine (HT), or the l-DES inhibitor dl-propargylglycine (PAG). The seedlings were then exposed for three weeks to control or SS (100 mmol L−1 NaCl) and supplemented with or without GSH or GSH+NaHS (sodium hydrosulfide, H2S donor). Salinity suppressed dry biomass, leaf water potential, chlorophyll contents, maximum quantum efficiency, ascorbate, and the activities of dehydroascorbate reductase, monodehydroascorbate reductase, and glyoxalase II in plants. Contrarily, it enhanced the accumulation of hydrogen peroxide, malondialdehyde, methylglyoxal, electrolyte leakage, proline, GSH, the activities of glutathione reductase, peroxidase, catalase, superoxide dismutase, ascorbate peroxidase, glyoxalase I, and l-DES, as well as endogenous H2S content. Salinity enhanced leaf Na+ but reduced K+; however, the reverse was true with GSH application. Overall, the treatments, GSH and GSH+NaHS, effectively reversed the oxidative stress and upregulated salt tolerance in pepper plants by controlling the activities of the AsA-GSH and glyoxalase-system-related enzymes as well as the levels of osmolytes.

scholarly journals Hydrogen sulfide and potassium synergistically induce osmotic stress tolerance through regulation of H+-ATPase activity and sugar metabolism in tomato seedlings

2021 ◽  
Author(s):  
Manzer H. Siddiqui ◽  
Soumya Mukherjee ◽  
Saud Alamri ◽  
Yanbo Hu ◽  
Abdullah Alamri ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Osmotic Stress ◽  
Atpase Activity ◽  
Channel Blocker ◽  
Sugar Metabolism ◽  
Decisive Role ◽  
K Channel ◽  
Tomato Seedlings ◽  
Osmotic Stress Tolerance

Abstract Potassium (K) is an essential macronutrient which is known to regulate key metabolic processes, modulate enzyme activity and plays a decisive role in osmotic adjustment in plants. Present work evaluates the role of K in the regulation of endogenous hydrogen sulfide (H2S) signaling in modulating the tolerance of tomato (Solanum lycopersicum L. Mill.) seedlings to osmotic stress. The findings reveal that exposure of seedlings to 15% (w/v) polyethylene glycol 8000 (PEG) led to a substantial decrease in leaf K content which was associated with reduced H+-ATPase activity. Exogenous application of K to the stressed seedlings significantly improved endogenous K content. Treatment with sodium orthovanadate (SOV, PM H+-ATPase inhibitor) and tetraethylammonium chloride (TEA, K channel blocker) suggests that exogenous K stimulated H+-ATPase activity that further regulated endogenous K content in tomato seedlings subjected to osmotic stress. Moreover, reduction in H+-ATPase activity by hypotaurine (H2S scavenger) substantiates the role of endogenous H2S in the regulation of H+-ATPase activity. Elevation in endogenous K content enhanced the biosynthesis of hydrogen sulfide (H2S) through enhancing the synthesis of cysteine, the H2S precursor. Synergistic action of H2S and K effectively neutralized osmotic stress by regulating sugar metabolism that resulted in osmotic adjustment, as witnessed by reduced water loss and improved hydration level of the stressed seedlings. Cross talk of H2S and K also assisted the seedlings in the activation of antioxidant enzymes that controlled the generation of reactive oxygen species and led to the protection against oxidative stress. The integrative role of H2S and K signaling was validated using hypotaurine (H2S scavenger) and TEA (K channel blocker) which weakened the protection against osmotic stress induced impairments. In conclusion, exogenous K and endogenous H2S regulate H+-ATPase activity which plays a decisive role in the maintenance of endogenous K homeostasis. Thus, present work reveals that K and H2S crosstalk is essential for modulation of osmotic stress tolerance in tomato seedlings.

Hydrogen sulfide counteracts chlorophyll loss in sweetpotato seedling leaves and alleviates oxidative damage against osmotic stress

2009 ◽  
Vol 58 (3) ◽  
pp. 243-250 ◽  
Author(s):  
Hua Zhang ◽  
Yong-Kang Ye ◽  
Song-Hua Wang ◽  
Jian-Ping Luo ◽  
Jun Tang ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Osmotic Stress ◽  
Oxidative Damage

scholarly journals Transcriptional regulation of gene expression during osmotic stress responses by the mammalian target of rapamycin

2012 ◽  
Vol 40 (10) ◽  
pp. 4368-4384 ◽  
Author(s):  
M. Carmen Ortells ◽  
Beatriz Morancho ◽  
Katherine Drews-Elger ◽  
Benoit Viollet ◽  
Keith R. Laderoute ◽  
...  
Keyword(s):  
Gene Expression ◽  
Transcriptional Regulation ◽  
Osmotic Stress ◽  
Stress Responses ◽  
Regulation Of Gene Expression ◽  
Mammalian Target Of Rapamycin ◽  
Target Of Rapamycin

Promoter-associated histone acetylation is involved in the osmotic stress-induced transcriptional regulation of the maizeZmDREB2Agene

2013 ◽  
Vol 151 (4) ◽  
pp. 459-467 ◽  
Author(s):  
Lin Zhao ◽  
Pu Wang ◽  
Shihan Yan ◽  
Fei Gao ◽  
Hui Li ◽  
...  
Keyword(s):  
Transcriptional Regulation ◽  
Osmotic Stress ◽  
Histone Acetylation

ABA-mediated transcriptional regulation in response to osmotic stress in plants

2011 ◽  
Vol 124 (4) ◽  
pp. 509-525 ◽  
Author(s):  
Yasunari Fujita ◽  
Miki Fujita ◽  
Kazuo Shinozaki ◽  
Kazuko Yamaguchi-Shinozaki
Keyword(s):  
Transcriptional Regulation ◽  
Osmotic Stress
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