Molecular Plant
Abstract
Salt-Overly-Sensitive (SOS) signaling module comprising the sodium-transport protein SOS1 and the regulatory proteins SOS2 and SOS3, is well known as the central salt excretion system that helps plants against salt accumulation. Here we report that VPS23A, a component of the endosomal sorting complex required for transport (ESCRT), plays an essential role in the function of the SOS module to confer plant salt tolerance. VPS23A enhances the interaction of the SOS2/SOS3 complex. In the presence of salt stress, VPS23A positively regulates the process of re-distribution of SOS2 to the plasma membrane and then activates the antiporter activity of SOS1 to reduce Na+accumulation in plant cells. Genetic evidence demonstrated that salt tolerance achieved by the overexpression ofSOS2andSOS3depended onVPS23A. Taken together, our results identified that VPS23A is a crucial regulator of the SOS module that affects the subcellular localization of SOS2 to the cell membrane. Moreover, the strong salt tolerance ofArabidopsisseedlings conferred by a membrane-bound SOS2 revealed the significance of the action of SOS2 sorting to the cell membrane in achieving its function.
论文编号: | DOI:10.1016/j.molp.2020.05.010 |
论文题目: | ESCRT-I Component VPS23A Sustains Salt Tolerance by Strengthening the SOS Module in Arabidopsis |
英文论文题目: | ESCRT-I Component VPS23A Sustains Salt Tolerance by Strengthening the SOS Module in Arabidopsis |
第一作者: | Lijuan Lou, Feifei Yu, Miaomiao Tian, Guangchao Liu, Yaorong Wu, Yujiao Wu, Ran Xia, Jose M. Pardo, Yan Guo, Qi Xie |
英文第一作者: | Lijuan Lou, Feifei Yu, Miaomiao Tian, Guangchao Liu, Yaorong Wu, Yujiao Wu, Ran Xia, Jose M. Pardo, Yan Guo, Qi Xie |
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发表年度: | 2020-05-23 |
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摘要: | Salt-Overly-Sensitive (SOS) signaling module comprising the sodium-transport protein SOS1 and the regulatory proteins SOS2 and SOS3, is well known as the central salt excretion system that helps plants against salt accumulation. Here we report that VPS23A, a component of the endosomal sorting complex required for transport (ESCRT), plays an essential role in the function of the SOS module to confer plant salt tolerance. VPS23A enhances the interaction of the SOS2/SOS3 complex. In the presence of salt stress, VPS23A positively regulates the process of re-distribution of SOS2 to the plasma membrane and then activates the antiporter activity of SOS1 to reduce Na+accumulation in plant cells. Genetic evidence demonstrated that salt tolerance achieved by the overexpression ofSOS2andSOS3depended onVPS23A. Taken together, our results identified that VPS23A is a crucial regulator of the SOS module that affects the subcellular localization of SOS2 to the cell membrane. Moreover, the strong salt tolerance ofArabidopsisseedlings conferred by a membrane-bound SOS2 revealed the significance of the action of SOS2 sorting to the cell membrane in achieving its function. |
英文摘要: | Salt-Overly-Sensitive (SOS) signaling module comprising the sodium-transport protein SOS1 and the regulatory proteins SOS2 and SOS3, is well known as the central salt excretion system that helps plants against salt accumulation. Here we report that VPS23A, a component of the endosomal sorting complex required for transport (ESCRT), plays an essential role in the function of the SOS module to confer plant salt tolerance. VPS23A enhances the interaction of the SOS2/SOS3 complex. In the presence of salt stress, VPS23A positively regulates the process of re-distribution of SOS2 to the plasma membrane and then activates the antiporter activity of SOS1 to reduce Na+accumulation in plant cells. Genetic evidence demonstrated that salt tolerance achieved by the overexpression ofSOS2andSOS3depended onVPS23A. Taken together, our results identified that VPS23A is a crucial regulator of the SOS module that affects the subcellular localization of SOS2 to the cell membrane. Moreover, the strong salt tolerance ofArabidopsisseedlings conferred by a membrane-bound SOS2 revealed the significance of the action of SOS2 sorting to the cell membrane in achieving its function. |
刊物名称: | Molecular Plant |
英文刊物名称: | Molecular Plant |
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其它备注: | Lijuan Lou, Feifei Yu, Miaomiao Tian, Guangchao Liu, Yaorong Wu, Yujiao Wu, Ran Xia, Jose M. Pardo, Yan Guo, Qi Xie. ESCRT-I Component VPS23A Sustains Salt Tolerance by Strengthening the SOS Module in Arabidopsis. Molecular Plant. DOI:10.1016/j.molp.2020.05.010 |
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