Sun Xun, Huo Liuqing, Jia Xin, Che Runmin, Gong Xiaoqing, Wang Ping, Ma Fengwang
State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China.
Hortic Res. 2018 Nov 1;5:57. doi: 10.1038/s41438-018-0059-5. eCollection 2018.
Marssonina apple blotch, caused by , is one of the most serious diseases of apple. Autophagy plays a key role in pathogen resistance. We previously showed that MdATG18a has a positive influence on drought tolerance. Herein, we describe how overexpression (OE) of enhances resistance to infection, probably because less HO but more salicylic acid (SA) is accumulated in the leaves of OE apple plants. Expression of , , and SA-related marker genes was induced more strongly by in OE lines. Transcript levels of other important genes were also drastically increased by in OE plants, which indicated increased autophagy activities. Taken together, these results demonstrate that OE of enhances resistance to infection by and plays positive roles in HO-scavenging and SA accumulations. Our findings provide important information for designing strategies which could induce autophagy to minimize the impact of this disease on apple production.
由[病原体名称未给出]引起的苹果炭疽叶枯病是苹果最严重的病害之一。自噬在病原体抗性中起关键作用。我们之前表明MdATG18a对耐旱性有积极影响。在此，我们描述了[基因名称未给出]的过表达（OE）如何增强对[病原体名称未给出]感染的抗性，这可能是因为OE苹果植株叶片中积累的过氧化氢（HO）较少但水杨酸（SA）较多。在OE株系中，[相关基因名称未给出]、[相关基因名称未给出]和SA相关标记基因的表达受[病原体名称未给出]诱导更强。在OE植株中，其他重要的[自噬相关基因名称未给出]基因的转录水平也因[病原体名称未给出]而大幅增加，这表明自噬活性增强。综上所述，这些结果表明[基因名称未给出]的OE增强了对[病原体名称未给出]感染的抗性，并在清除HO和积累SA方面发挥积极作用。我们的研究结果为设计可诱导自噬以尽量减少这种病害对苹果生产影响的策略提供了重要信息。
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