Exploring native arsenic (As)-resistant bacteria: unveiling multifaceted mechanisms for plant growth promotion under As stress.

IF 3.2 3区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of Applied Microbiology Pub Date : 2024-09-02 DOI:10.1093/jambio/lxae228

Yaoyao Yan, Wenying Chang, Peili Tian, Jiying Chen, Jiayin Jiang, Xianzhu Dai, Tao Jiang, Feng Luo, Caiyun Yang

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引用次数: 0

Abstract

Aims: This study explores the plant growth-promoting effect (PGPE) and potential mechanisms of the arsenic (As)-resistant bacterium Flavobacterium sp. A9 (A9 hereafter).

Methods and results: The influences of A9 on the growth of Arabidopsis thaliana, lettuce, and Brassica napus under As(V) stress were investigated. Additionally, a metabolome analysis was conducted to unravel the underlying mechanisms that facilitate PGPE. Results revealed that A9 significantly enhanced the fresh weight of Arabidopsis seedlings by 62.6%-135.4% under As(V) stress. A9 significantly increased root length (19.4%), phosphorus (25.28%), chlorophyll content (59%), pod number (24.42%), and weight (18.88%), while decreasing As content (48.33%, P ≤ .05) and oxidative stress of Arabidopsis. It also significantly promoted the growth of lettuce and B. napus under As(V) stress. A9 demonstrated the capability to produce ≥31 beneficial substances contributing to plant growth promotion (e.g. gibberellic acid), stress tolerance (e.g. thiamine), and reduced As accumulation (e.g. siderophores).

Conclusions: A9 significantly promoted the plant growth under As stress and decreased As accumulation by decreasing oxidative stress and releasing beneficial compounds.

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探索本地抗砷（As）细菌：揭示砷胁迫下促进植物生长的多重机制。

目的：本研究探讨了耐砷细菌黄杆菌 A9（以下简称 A9）的植物生长促进效应（PGPE）及其潜在机制：研究了 A9 对拟南芥、莴苣和甘蓝在 As（V）胁迫下生长的影响。此外，还进行了代谢组分析，以揭示促进 PGPE 的内在机制。结果表明，在 As（Ⅴ）胁迫下，A9 能显著提高拟南芥幼苗鲜重的 62.6% 至 135.4%。A9 能明显增加拟南芥的根长（19.4%）、磷含量（25.28%）、叶绿素含量（59%）、荚果数（24.42%）和重量（18.88%），同时降低拟南芥的砷含量（48.33%，P≤0.05）和氧化应激。在 As（V）胁迫下，它还能明显促进莴苣和油菜的生长。A9 能够产生≥ 31 种有益物质，这些物质有助于促进植物生长（如赤霉素）、抗逆性（如硫胺素）和减少砷积累（如嗜苷酸）：结论：A9 通过降低氧化应激和释放有益化合物，明显促进了砷胁迫下的植物生长并减少了砷积累。

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

Journal of Applied Microbiology 生物-生物工程与应用微生物

CiteScore

7.30

自引率

2.50%

发文量

427

审稿时长

2.7 months

期刊介绍： Journal of & Letters in Applied Microbiology are two of the flagship research journals of the Society for Applied Microbiology (SfAM). For more than 75 years they have been publishing top quality research and reviews in the broad field of applied microbiology. The journals are provided to all SfAM members as well as having a global online readership totalling more than 500,000 downloads per year in more than 200 countries. Submitting authors can expect fast decision and publication times, averaging 33 days to first decision and 34 days from acceptance to online publication. There are no page charges.