Involvement of Arabidopsis phospholipase D delta in regulation of ROS-mediated microtubule organization and stomatal movement upon heat shock

文献类型： 外文期刊

第一作者： Song, Ping

作者： Song, Ping;Jia, Qianru;Chen, Long;Jin, Xin;Xiao, Xingkai;Li, Li;Qu, Yana;Zhang, Wenhua;Zhang, Qun;Li, Li;Chen, Huatao;Su, Yinghua

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关键词： Heat shock; microtubule; phospholipase D; reactive oxygen species; stomatal movement

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.992； 五年影响因子：7.86 ）

ISSN： 0022-0957

年卷期： 2020 年 71 卷 20 期

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收录情况： SCI

摘要： Reactive oxygen species (ROS) are plant metabolic and signaling molecules involved in responses to various external stresses, but the existence of ROS receptors and how plants respond to ROS remain largely unknown. Here we report that the plasma membrane-localized phospholipase D delta (PLD delta) protein is crucial for sensing heat shock-induced ROS to initiate reorganization of guard cell microtubules in Arabidopsis cotyledons. Heat shock of wild-type Arabidopsis cotyledons stimulated ROS production which disrupted microtubule organization and induced stomatal closure, whereas this process was markedly impaired in pldd mutants. Moreover, wild-type PLD delta, but not the Arg622-mutated PLD delta, complemented the pldd phenotypes in heat shock-treated plants. ROS activated PLDd by oxidizing cysteine residues, an action that was required for its functions in ROS-induced depolymerization of guard cell microtubules, stomatal closure, and plant thermotolerance. Additionally, lipid profiling reveals involvement of microtubule organization in the feedback regulation of glycerolipid metabolism upon heat stress. Together, our findings highlight a potential mechanosensory role for PLD delta in regulating the dynamic organization of microtubules and stomatal movement, as part of the ROS-sensing pathway, during the response to external stresses.

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