Jiangsu Key Laboratory for Pathogens and Ecosystems, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China.
J Agric Food Chem. 2024 Sep 11;72(36):20211-20223. doi: 10.1021/acs.jafc.4c05009. Epub 2024 Aug 28.
Drought dramatically affects plant growth and yield. A previous study indicated that endophytic fungus can improve the drought resistance of peanuts, which is related with the root arbuscular mycorrhizal fungi (AMF) community; however, how root endophytes mediate AMF assembly to affect plant drought resistance remains unclear. Here, we explored the mechanism by which endophytic fungus recruits AMF symbiotic partners via rhizodeposits to improve host drought resistance. The results showed that enhanced peanut drought resistance by enriching the AMF genus of the rhizosphere. Furthermore, metabolomic analysis indicated that significantly promoted isoformononetin and salicylic acid (SA) synthesis in rhizodeposits, which were correlated with the increase in abundance following inoculation. Coinoculation experiments confirmed that isoformononetin and SA could enrich in the rhizosphere, thereby improving the drought resistance. This study highlights the crucial role of fungal consortia in plant stress resistance.
干旱极大地影响了植物的生长和产量。先前的研究表明，内生真菌可以提高花生的抗旱性，这与根内共生菌丛枝菌根真菌（AMF）群落有关；然而，根内生菌如何通过根分泌物招募 AMF 共生伙伴来影响植物抗旱性尚不清楚。在这里，我们通过根分泌物探索了内生真菌招募 AMF 共生伙伴以提高宿主抗旱性的机制。结果表明，内生真菌通过丰富根际 AMF 属来增强花生的抗旱性。此外，代谢组学分析表明，内生真菌显著促进了根分泌物中异芒柄花素和水杨酸（SA）的合成，这与接种后丰度的增加有关。共接种实验证实，异芒柄花素和 SA 可以富集根际中的，从而提高抗旱性。本研究强调了真菌共生体在植物抗胁迫中的关键作用。
