| 论文题目: | MYB75 Phosphorylation by MPK4 Is Required for Light-Induced Anthocyanin Accumulation in Arabidopsis |
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| 作者: | Li, Shengnan Wang, Wenyi Gao, Jinlan Yin, Kangquan Wang, Rui Wang, ChengCheng Petersen, Morten Mundy, John Qiu, Jin-Long |
| 联系作者: | Qiu, Jin-Long* |
| 刊物名称: | Plant Cell |
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| 年份: | 2016 |
| 影响因子: | 9.88 |
| 论文下载: | http://www.plantcell.org/content/28/11/2866 |
| 摘要: | Light is a major environmental cue affecting various physiological and metabolic processes in plants. Although plant photoreceptors are well characterized, the mechanisms by which light regulates downstream responses are less clear. In Arabidopsis thaliana, the accumulation of photo-protective anthocyanin pigments is light dependent and the R2R3 MYB transcription factor MYB75/PAP1 regulates anthocyanin accumulation. Here we report that MYB75 interacts with and is phosphorylated by MAP KINASE 4 (MPK4). Their interaction is dependent on MPK4 kinase activity and is required for full function of MYB75. MPK4 can be activated in response to light, and is involved in the light-induced accumulation of anthocyanins. We show that MPK4 phosphorylation of MYB75 increases its stability and is essential for light-induced anthocyanin accumulation. Our findings reveal an important role for a MAPK pathway in light signal transduction. |
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