菌株通过产生酸减轻植物中的非生物压力
Zhijie Yang1, Yijun Qiao1, Naga Charan Konakalla2
1Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs, Lyngby, Denmark.
Nature communications
|November 15, 2023
概括
一些土壤细菌,Streptomyces,产生化合物,增强植物对干旱和盐度压力的抵抗力. 这些化合物促进根生长并激活应激反应基因,为气候变化适应提供农业应用.
科学领域:
- 微生物生态学 微生物生态学
- 植物科学 植物科学
- 生物化学 生物化学
背景情况:
- 土壤微生物增强了植物的健康和承受压力的能力.
- 关联微生物特征与植物非生物应激耐受性的机制尚不清楚.
研究的目的:
- 调查杆菌通过哪些机制来缓解植物的干旱和盐度压力.
- 为了确定特定的微生物代谢物,负责增强植物非生物应激耐受性.
主要方法:
- 用Streptomyces产生的酸 (H和F) 处理阿拉比多普西斯幼苗.
- 在非生物压力下的根生长促进和基因表达变化 (转录学) 的分析.
- 确认了活体生物合成基因集群的pteridic酸和elaiophylin.
主要成果:
- 胺酸H和F在非生物压力下在1.3nM时显著促进了Arabidopsis的根生长.
- 转录组学揭示了在酸治疗后,应激反应基因的表达增加.
- 一个用于酸和伊莱奥菲林生物合成的双功能基因集群被确定并在体内得到证实.
结论:
- 杆菌产生酸,使植物耐受干旱和盐度.
- 胺酸通过促进根生长和调节植物应激反应基因而起作用.
- 这一发现为在农业中使用有益的微生物及其代谢物来应对气候变化影响提供了有前途的战略.
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