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微生物通过 ABA 介导的根系架构和表观遗传重编程诱导耐旱性。

Microbe-induced drought tolerance by ABA-mediated root architecture and epigenetic reprogramming.

机构信息

DARWIN21, Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.

Biology Department, College of Sciences, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.

出版信息

EMBO Rep. 2023 Aug 3;24(8):e56754. doi: 10.15252/embr.202256754. Epub 2023 Jun 6.

DOI:10.15252/embr.202256754
PMID:37278352
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10398642/
Abstract

The use of beneficial microbes to mitigate drought stress tolerance of plants is of great potential albeit little understood. We show here that a root endophytic desert bacterium, Pseudomonas argentinensis strain SA190, enhances drought stress tolerance in Arabidopsis. Transcriptome and genetic analysis demonstrate that SA190-induced root morphogenesis and gene expression is mediated via the plant abscisic acid (ABA) pathway. Moreover, we demonstrate that SA190 primes the promoters of target genes in an epigenetic ABA-dependent manner. Application of SA190 priming on crops is demonstrated for alfalfa, showing enhanced performance under drought conditions. In summary, a single beneficial root bacterial strain can help plants to resist drought conditions.

摘要

利用有益微生物来减轻植物的干旱胁迫耐受性具有很大的潜力，尽管目前对此了解甚少。我们在这里表明，一种根内生的沙漠细菌，即阿根廷假单胞菌菌株 SA190，可以增强拟南芥的干旱胁迫耐受性。转录组和遗传分析表明，SA190 诱导的根形态发生和基因表达是通过植物脱落酸（ABA）途径介导的。此外，我们证明 SA190 以一种依赖于 ABA 的表观遗传方式启动靶基因的启动子。我们已经在紫花苜蓿等作物上证明了 SA190 引发的应用，在干旱条件下表现出更好的性能。总之，单一的有益根细菌菌株可以帮助植物抵抗干旱条件。

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