scholarly journals Osmotic Stress Activates Two Reactive Oxygen Species Pathways with Distinct Effects on Protein Nanodomains and Diffusion

2019 ◽  
Vol 179 (4) ◽  
pp. 1581-1593 ◽  
Author(s):  
Alexandre Martinière ◽  
Jean Bernard Fiche ◽  
Marija Smokvarska ◽  
Stéphane Mari ◽  
Carine Alcon ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Osmotic Stress ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
And Diffusion

Resveratrol Alleviates the KCl Salinity Stress of Malus hupenensis Rhed. Seedlings by Regulating K+/Na+ Homeostasis, Osmotic Adjustment, and Reactive Oxygen Species Scavenging

2021 ◽  
Author(s):  
Tingting Li ◽  
Yuqi Li ◽  
Zhijuan Sun ◽  
Xiangli Xi ◽  
Guangli Sha ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Osmotic Stress ◽  
Salinity Stress ◽  
Osmotic Adjustment ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Apple Rootstock ◽  
Physiological Mechanisms ◽  
Species Production ◽  
Apple Quality

Abstract Background: Applying large amounts of potash fertilizer in apple orchards for high apple quality and yield aggravates KCl stress. As a phytoalexin, resveratrol (Res) participates in plant resistance to biotic stress. However, its role in relation to KCl stress have never been reported. Results: Malus hupenensis is a widely used apple rootstock in China and is sensitive to KCl stress. In this study, 100 µmol Res was exogenously applied to alleviate KCl stress in M. hupenensis seedlings. The seedlings treated with Res had higher chlorophyll content and photosynthetic index than those without Res treatment. Moreover, the molecular and physiological mechanisms of Res in ion toxicity, osmotic stress, and oxidative damage induced by KCl stress were also investigated. First, exogenous Res affects K+/Na+ homeostasis in cytoplasm by enhancing K+ efflux outside the cells, inhibiting Na+ efflux and K+ absorption, and compartmentalizing K+ into vacuoles. Second, this compound could respond to osmotic stress by regulating the accumulation of proline. Lastly, this polyphenol functions as an antioxidant that strengthens the activities of POD and CAT thus eliminates the reactive oxygen species production induced by KCl stress.Conclusions: Taken together, these results reveal that resveratrol alleviates the KCl salinity stress of M. hupenensis seedlings by regulating K+/Na+ homeostasis, osmotic adjustment, and reactive oxygen species scavenging.

ZmMKK4 regulates osmotic stress through reactive oxygen species scavenging in transgenic tobacco

2011 ◽  
Vol 30 (11) ◽  
pp. 2097-2104 ◽  
Author(s):  
Xiangpei Kong ◽  
Liping Sun ◽  
Yan Zhou ◽  
Maoying Zhang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Osmotic Stress ◽  
Transgenic Tobacco ◽  
Reactive Oxygen ◽  
Oxygen Species
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