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Oceanobacillus picturae alleviates cadmium stress and promotes growth in soybean seedlings

文献类型： 外文期刊

作者： Yang, Shangjun 1 ; Han, Xue 1 ; Li, Jun 1 ; Luan, Feng 2 ; Zhang, Shuli 3 ; Han, Dezhi 4 ; Yang, Mingliang 1 ; Chen, Qingshan 1 ; Qi, Zhaoming 1 ;

作者机构： 1.Northeast Agr Univ, Natl Res Ctr Soybean Engn & Technol, Harbin 150030, Heilongjiang, Peoples R China

2.Heilongjiang Bayi Agr Univ, Coll Engn, Daqing 163000, Heilongjiang, Peoples R China

3.Heilongjiang Acad Agr Sci, Wuchang Branch, Wuchang 150229, Heilongjiang, Peoples R China

4.Heilongjiang Acad Agr Sci, Heihe Branch, Heihe, Peoples R China

关键词： Cd stress; Metagenome; Soybean; Oceanobacillus picturae; Remediation

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2024 年 472 卷

页码：

收录情况： SCI

摘要： Cadmium (Cd) is a heavy metal that significantly impacts human health and the environment. Microorganisms play a crucial role in reducing heavy metal stress in plants; however, the mechanisms by which microorganisms enhance plant tolerance to Cd stress and the interplay between plants and microorganisms under such stress remain unclear. In this study, Oceanobacillus picturae ( O. picturae ) was isolated for interaction with soybean seedlings under Cd stress. Results indicated that Cd treatment alone markedly inhibited soybean seedling growth. Conversely, inoculation with O. picturae significantly improved growth indices such as plant height, root length, and fresh weight, while also promoting recovery in soil physiological indicators and pH. Metabolomic and transcriptomic analyses identified 157 genes related to aspartic acid, cysteine, and flavonoid biosynthesis pathways. Sixty-three microbial species were significantly associated with metabolites in these pathways, including pathogenic, adversity -resistant, and bioconductive bacteria. This research experimentally demonstrates, for the first time, the growth -promoting effect of the O. picturae strain on soybean seedlings under non stress conditions. It also highlights its role in enhancing root growth and reducing Cd accumulation in the roots under Cd stress. Additionally, through the utilization of untargeted metabolomics, metagenomics, and transcriptomics for a multi-omics analysis, we investigated the impact of O. picturae on the soil microbiome and its correlation with differential gene expression in plants. This innovative approach unveils the molecular mechanisms underlying O. picturae 's promotion of root growth and adaptation to Cd stress.

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