Autophagic Survival Precedes Programmed Cell Death in Wheat Seedlings Exposed to Drought Stress

文献类型： 外文期刊

第一作者： Li, Yong-Bo

作者： Li, Yong-Bo;Cui, De-Zhou;Sui, Xin-Xia;Huang, Chen;Huang, Cheng-Yan;Fan, Qing-Qi;Chu, Xiu-Sheng;Chu, Xiu-Sheng

作者机构：

关键词： wheat seedlings; drought; autophagy; programmed cell death

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

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年卷期： 2019 年 20 卷 22 期

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收录情况： SCI

摘要： Although studies have shown the concomitant occurrence of autophagic and programmed cell death (PCD) in plants, the relationship between autophagy and PCD and the factors determining this relationship remain unclear. In this study, seedlings of the wheat cultivar Jimai 22 were used to examine the occurrence of autophagy and PCD during polyethylene glycol (PEG)-8000-induced drought stress. Autophagy and PCD occurred sequentially, with autophagy at a relatively early stage and PCD at a much later stage. These findings suggest that the duration of drought stress determines the occurrence of PCD following autophagy. Furthermore, the addition of 3-methyladenine (3-MA, an autophagy inhibitor) and the knockdown of autophagy-related gene 6 (ATG6) accelerated PEG-8000-induced PCD, respectively, suggesting that inhibition of autophagy also results in PCD under drought stress. Overall, these findings confirm that wheat seedlings undergo autophagic survival under mild drought stress, with subsequent PCD only under severe drought.

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