Acetic acid alters rhizosphere microbes and metabolic composition to improve willows drought resistance

IF 8.2 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment Pub Date : 2022-10-20 DOI:10.1016/j.scitotenv.2022.157132

Xiangge Kong , Zian Guo , Yuan Yao, Linchao Xia, Ruixuan Liu, Haifeng Song, Sheng Zhang

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引用次数: 9

Abstract

The adverse effects of drought on plants are gradually exacerbated with global climatic change. Amelioration of the drought stress that is induced by low doses of acetic acid (AA) has been caused great interest in plants. However, whether AA can change soil microbial composition is still unknown. Here, we investigated how exogenous AA regulates the physiology, rhizosphere soil microorganisms and metabolic composition on Salix myrtillacea under drought stress. The physiological results showed that AA could improve the drought tolerance of S. myrtillacea. Azotobacter and Pseudomonas were enriched in the rhizosphere by AA irrigation. AA significantly increased the relative contents of amino acid metabolites (e.g., glycyl-L-tyrosine, l-glutamine and seryl-tryptophan) and decreased the relative contents of phenylpropane metabolites (e.g., fraxetin and sinapyl aldehyde) in soils. The enrichments of Azotobacter and Pseudomonas were significantly correlated with glycyl-L-tyrosine, l-glutamine, seryl-tryptophan, fraxetin and sinapyl aldehyde, which could increase the stress resistance by promoting nitrogen (N) uptake for willows. Furthermore, inoculation with Azotobacter chroococcum and Pseudomonas fluorescens could significantly improve willows drought tolerance. Therefore, our results reveal that the changes of plant physiology, rhizosphere soil microorganisms and metabolic composition induced by AA can improve willows drought resistance by enhancing N uptake.

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醋酸改变杨柳根际微生物和代谢组成，提高杨柳抗旱性

随着全球气候的变化，干旱对植物的不利影响逐渐加剧。低剂量乙酸(AA)诱导的干旱胁迫的改善已引起植物界的广泛关注。然而，AA是否能改变土壤微生物组成尚不清楚。本文研究了干旱胁迫下外源AA对杨柳生理、根际土壤微生物和代谢组成的调控作用。生理结果表明，AA能提高桃金娘的耐旱性。AA灌溉可使根际中固氮菌和假单胞菌富集。AA显著提高了土壤氨基酸代谢物(甘氨酸-酪氨酸、l-谷氨酰胺和seryl-色氨酸)的相对含量，显著降低了苯丙烷代谢物(黄曲霉素和sinapyl醛)的相对含量。固氮菌和假单胞菌的富集与甘氨酸-酪氨酸、谷氨酰胺、色氨酸-色氨酸、曲黄蛋白和sinapyl醛呈极显著相关，可以通过促进柳树对氮的吸收来提高抗逆性。此外，接种固氮菌和荧光假单胞菌可显著提高柳树的抗旱性。因此，我们的研究结果表明，AA诱导的植物生理、根际土壤微生物和代谢组成的变化可以通过提高氮素吸收来提高柳树的抗旱性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science of the Total Environment 环境科学-环境科学

CiteScore

17.60

自引率

10.20%

发文量

8726

审稿时长

2.4 months

期刊介绍： The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.