Deng Linmei, Luo Lifen, Li Yue, Wang Luotao, Zhang Junxing, Zi Bianxian, Ye Chen, Liu Yixiang, Huang Huichuan, Mei Xinyue, Deng Weiping, He Xiahong, Zhu Shusheng, Yang Min
State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, 650201 Kunming, China.
National Engineering Research Center for Applied Technology of Agricultural Biodiversity, College of Plant Protection, Yunnan Agricultural University, 650201 Kunming, China.
J Agric Food Chem. 2023 Mar 22;71(11):4536-4549. doi: 10.1021/acs.jafc.3c00311. Epub 2023 Mar 9.
Plants can recruit beneficial microbes to help improve their fitness under abiotic or biotic stress. Our previous studies found that could enrich beneficial sp. B36 in the rhizosphere soil under autotoxic ginsenoside stress. Here, we clarified that ginsenoside stress activated the phenylpropanoid biosynthesis and α-linolenic acid metabolism pathways of roots to increase the secretion of cinnamic acid, 2-dodecenoic acid, and 12-oxo-phytodienoic acid. These metabolites could promote the growth of B36. Importantly, cinnamic acid could simultaneously promote the chemotaxis and growth of B36, enhance the colonization of B36 in the rhizosphere, and eventually increase the survival rate of . Overall, the plants could promote the growth and colonization of beneficial bacteria through key metabolites in root exudates under autotoxin stress. This finding will facilitate the practical application of beneficial bacteria in agricultural production and lead to successful and reproducible biocontrol efficacy by the exogenous addition of key metabolites.
植物可以招募有益微生物，以帮助它们在非生物或生物胁迫下提高适应性。我们之前的研究发现，[具体植物]在自毒人参皂苷胁迫下能够在根际土壤中富集有益的[微生物名称] sp. B36。在此，我们阐明人参皂苷胁迫激活了根系的苯丙烷生物合成和α-亚麻酸代谢途径，以增加肉桂酸、2-十二碳烯酸和12-氧代植物二烯酸的分泌。这些代谢产物可以促进B36的生长。重要的是，肉桂酸可以同时促进B36的趋化性和生长，增强B36在根际的定殖，并最终提高[植物名称]的存活率。总体而言，植物可以通过自毒胁迫下根系分泌物中的关键代谢产物促进有益细菌的生长和定殖。这一发现将有助于有益细菌在农业生产中的实际应用，并通过外源添加关键代谢产物实现成功且可重复的生物防治效果。
