Hydrogen Peroxide-Induced Root Ca2+ and K⁺ Fluxes Correlate with Salt Tolerance in Cereals: Towards the Cell-Based Phenotyping

International Journal of Molecular Sciences
Haiyang WangSergey Shabala

Abstract

Salinity stress-induced production of reactive oxygen species (ROS) and associated oxidative damage is one of the major factors limiting crop production in saline soils. However, the causal link between ROS production and stress tolerance is not as straightforward as one may expect, as ROS may also play an important signaling role in plant adaptive responses. In this study, the causal relationship between salinity and oxidative stress tolerance in two cereal crops-barley (Hordeum vulgare) and wheat (Triticum aestivum)-was investigated by measuring the magnitude of ROS-induced net K⁺ and Ca2+ fluxes from various root tissues and correlating them with overall whole-plant responses to salinity. We have found that the association between flux responses to oxidative stress and salinity stress tolerance was highly tissue specific, and was also dependent on the type of ROS applied. No correlation was found between root responses to hydroxyl radicals and the salinity tolerance. However, when oxidative stress was administered via H₂O₂ treatment, a significant positive correlation was found for the magnitude of ROS-induced K⁺ efflux and Ca2+ uptake in barley and the overall salinity stress tolerance, but only for mature zone and not the ...Continue Reading

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Citations

Apr 9, 2020·Frontiers in Plant Science·Celymar A SolisZhong-Hua Chen
Feb 27, 2020·International Journal of Molecular Sciences·Juan ZhuMeixue Zhou
May 24, 2020·Trends in Plant Science·Minmin LiuSergey Shabala
Apr 23, 2021·Journal of Plant Physiology·Jin-Hai LiLan Huang
Jul 29, 2021·Plant Science : an International Journal of Experimental Plant Biology·Binjie MaYingchun Wang
Nov 12, 2021·Advanced Science·Qi ZhangJianfeng Ping

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