Proper PIN1 Distribution Is Needed for Root Negative Phototropism in Arabidopsis

文献类型： 外文期刊

第一作者： Zhang, Kun-Xiao

作者： Zhang, Kun-Xiao;Xu, Heng-Hao;Gong, Wen;Jin, Yan;Yuan, Ting-Ting;Li, Juan;Lu, Ying-Tang;Shi, Ya-Ya

作者机构：

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2014 年 9 卷 1 期

页码：

收录情况： SCI

摘要： Plants can be adapted to the changing environments through tropic responses, such as light and gravity. One of them is root negative phototropism, which is needed for root growth and nutrient absorption. Here, we show that the auxin efflux carrier PIN-FORMED (PIN) 1 is involved in asymmetric auxin distribution and root negative phototropism. In darkness, PIN1 is internalized and localized to intracellular compartments; upon blue light illumination, PIN1 relocalize to basal plasma membrane in root stele cells. The shift of PIN1 localization induced by blue light is involved in asymmetric auxin distribution and root negative phototropic response. Both blue-light-induced PIN1 redistribution and root negative phototropism is mediated by a BFA-sensitive trafficking pathway and the activity of PID/PP2A. Our results demonstrate that blue-light-induced PIN1 redistribution participate in asymmetric auxin distribution and root negative phototropism.

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