The Importance of Cl− Exclusion and Vacuolar Cl− Sequestration: Revisiting the Role of Cl− Transport in Plant Salt Tolerance
The Importance of Cl− Exclusion and Vacuolar Cl− Sequestration: Revisiting the Role of Cl− Transport in Plant Salt Tolerance
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DOI：
10.3389/fpls.2019.01418
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发表时间：
2019-11
影响因子：
5.6
通讯作者：
Honghong Wu;Zhaohu Li
中科院分区：
文献类型：
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作者：
Honghong Wu;Zhaohu Li
盐度威胁着全球的农业生产系统。虽然植物研究人员在盐胁迫耐受性领域的主要关注点一直是钠和钾，但对 Cl− 在植物盐胁迫反应中的转运模式和生理作用的研究却少得多。近年来，Cl−在植物耐盐胁迫中的作用被重新审视并受到更多关注。本综述试图弥补 Cl− 转运在植物耐盐胁迫中的作用的知识空白。讨论了 Cl− 转运、Cl− 排斥、液泡 Cl− 封存、不同植物物种控制枝条 Cl− 积累的机制的特异性，以及盐胁迫植物中参与 Cl− 转运的通道和转运蛋白的身份。强调了液泡膜上电化学梯度对于液泡 Cl− 隔离的重要性。 CaCl2 中的 Cl− 的毒性与 NaCl 中的 Cl− 的毒性分别进行了简要回顾。
Salinity threatens agricultural production systems across the globe. While the major focus of plant researchers working in the field of salinity stress tolerance has always been on sodium and potassium, the transport patterns and physiological roles of Cl− in plant salt stress responses are studied much less. In recent years, the role of Cl− in plant salinity stress tolerance has been revisited and has received more attention. This review attempts to address the gap in knowledge of the role of Cl− transport in plant salinity stress tolerance. Cl− transport, Cl− exclusion, vacuolar Cl− sequestration, the specificity of mechanisms employed in different plant species to control shoot Cl− accumulation, and the identity of channels and transporters involved in Cl− transport in salt stressed plants are discussed. The importance of the electrochemical gradient across the tonoplast, for vacuolar Cl− sequestration, is highlighted. The toxicity of Cl− from CaCl2 is briefly reviewed separately to that of Cl− from NaCl.