Higher ROS scavenging ability and plasma membrane H+-ATPase activity are associated with potassium retention in drought tolerant tea plants

文献类型： 外文期刊

第一作者： Zhang, Xianchen

作者： Zhang, Xianchen;Chen, Linmu;Chang, Na;Ge, Gaofei;Wang, Xiaochun;Wu, Honghong;Wu, Honghong;Chen, Jingguang

作者机构：

关键词： drought stress; K+; plasma membrane H+-ATPase; ROS; tea plants

期刊名称：JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE （ 影响因子：2.426； 五年影响因子：3.029 ）

ISSN： 1436-8730

年卷期： 2020 年 183 卷 4 期

页码：

收录情况： SCI

摘要： Drought is one of the main limiting factors resulting in the reduction of yield and quality of tea production. Our previous studies indicated that K+ retention was a key factor associated with alleviating drought-induced damage in tea plants. However, the underlying mechanisms are still unclear. In the present study, drought tolerant tea plant (variety Zhongcha108) exhibited higher plasma membrane (PM) H+-ATPase activity and lower negative membrane potential compared with the drought sensitive tea plant (variety Ruanzhiwulong). In addition to superior mesophyll K+ retention ability and higher PM H+-ATPase activity, the drought tolerant tea plant exhibited lower accumulation of reactive oxygen species (ROS) than the sensitive one. Moreover, exogenous supply of Na3VO4 (plasma membrane H+-ATPase inhibitor) and H2O2 (mimicking apoplastic ROS) resulted in a significantly higher K+ efflux in the mesophyll of the drought sensitive tea plant than the non-treated one. Taken together, the higher ROS scavenging ability and plasma membrane H+-ATPase activity were major factors contributing to the higher K+ retention in drought tolerant tea plants.

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