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Salt tolerance in rice: Physiological responses and molecular mechanisms

作者：

Citao Liu;Bigang Mao;Dingyang Yuan;Chengcai Chu;Meijuan Dua

单位：

College of Agriculture, Hunan Agricultural University, Changsha 410128, Hunan, China.;State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, The Innovative Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China;College of Agriculture, Hunan Agricultural University, Changsha 410128, Hunan, Chin;State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, Hunan, China

关键词：

Salt stress;Rice (Oryza sativa L.);Salt tolerance genes;Physiological response;Salt signal transductio

摘要：

Crop yield loss due to soil salinization is an increasing threat to agriculture worldwide. Salt stress drastically affects the growth, development, and grain productivity of rice (Oryza sativa L.), and the improvement of rice tolerance to salt stress is a desirable approach for meeting increasing food demand. The main contributors to salt toxicity at a global scale are Na' and Cl ions, which affect up to 50% of irrigated soils. Plant responses to salt stress occur at the organismic, cellular, and molecular levels and are pleiotropic, involving (1) maintenance of ionic homeostasis, (2) osmotic adjustment, (3) ROS scavenging, and (4) nutritional balance. In this review, we discuss recent research progress on these four aspects of plant physiological response, with particular attention to hormonal and gene expression regulation and salt tolerance signaling pathways in rice. The information summarized here will be useful for accelerating the breeding of salt-tolerant rice. (C) 2021 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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Salt tolerance in rice: Physiological responses and molecular mechanisms

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