转录因子TaWRKY27通过促进小麦中auxin的积累,增加了条纹生的易感性
Mohan Yao1, Zhen Liu2, Yixin Qiao2
1State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
Plant physiology
|June 14, 2025
概括
小麦敏感性基因TaWRKY27通过激活auxin积累促进条纹. 降低这种基因的调节可以增强小麦对Puccinia striiformis f. sp. 的耐药性. 特里蒂奇 (Pst),提供了一种新的作物改进战略.
科学领域:
- 植物病理学 植物病理学
- 分子植物-微生物相互作用
- 小麦遗传学 小麦遗传学
背景情况:
- 病原体利用宿主易感基因来殖民植物.
- 了解易感基因如何抑制免疫力对于作物改进至关重要.
- 在农作物中发展广泛的抗病能力是农业的一个关键目标.
研究的目的:
- 确定小麦免疫中易感基因的分子机制.
- 研究转录因子TaWRKY27在小麦条纹生中的作用.
- 确定TaWRKY27是否可以成为增强小麦抗病能力的目标.
主要方法:
- 在小麦 (Triticum aestivum L.) 中鉴定出TaWRKY27,其诱导因子是Puccinia striiformis f. sp. 三 (Pst) 感染.
- 在改变TaWRKY27表达的小麦中评估Pst抗性.
- 使用DNA亲和力净化测序 (DAP-seq) 和RNA-seq来识别TaWRKY27的目标.
- 使用酵母单杂交和双化酶记者测定证实了基因相互作用.
主要成果:
- 低调 TaWRKY27 增加了 Pst 耐药性;过度表达降低了耐药性并增加了辅酶.
- 辅助剂的应用抑制了小麦中与防御相关的基因表达.
- TaWRKY27直接激活TaACO3和TaSRG1,这会负面调节Pst的抗性.
- TaWRKY27促进了TaACO3/TaSRG1介导的辅酶积累,有助于敏感性.
结论:
- TaWRKY27是一种核局部转录激活剂,促进小麦条纹生易感性.
- TaWRKY27通过对TaACO3和TaSRG1进行上调来起作用,从而导致auxin积累和免疫抑制.
- TaWRKY27代表了基因工程的一个有希望的目标,以提高小麦的条纹抗性.
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