A glucomannan produced by Bacillus velezensis HY23 and its growth promoting effect on soybeans under salt stress

文献类型： 外文期刊

第一作者： Zou, Ping

作者： Zou, Ping;Ma, Siqi;Yuan, Yuan;Ma, Junqing;Yang, Xia;Jing, Changliang;Li, Yiqiang;Zou, Ping;Ma, Siqi;Yuan, Yuan;Ma, Junqing;Yang, Xia;Jing, Changliang;Li, Yiqiang;Zou, Ping;Ma, Siqi;Yuan, Yuan;Ma, Junqing;Yang, Xia;Jing, Changliang;Li, Yiqiang;Hu, Xihao;Meng, Qi

作者机构：

关键词： Glucomannan; Bacillus velezensis; Salt resistance

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0141-8130

年卷期： 2024 年 275 卷

页码：

收录情况： SCI

摘要： The Bacillus genus is widely distributed in nature, has bacteriostatic and growth-promoting activities, and has broad application potential in agriculture. An exopolysaccharide (EPS) was extracted and purified from Bacillus velezensis HY23. Structural characterisation of the EPS was performed by chemical and spectroscopic analyses. Methylation analysis showed that the EPS of HY23 was composed of mannose and glucose at a ratio of 82:18 and was identified as glucomannan. Combined with the nuclear magnetic resonance (NMR) analysis, EPS from HY23 had a backbone of -*2)-alpha-D-Manp-(1 -* and -*2,6)-alpha-D-Manp-(1 -* branched at C-6 with terminal alpha-(3-O-Me)-DManp-(1 -* and -*6)-alpha-D-Manp-(1 -* residues as the side chain. A certain amount of beta-D-Glcp residues were also present in backbone. Moreover, EPS significantly improved the nitrogen-fixing activity and salt resistance of soybean seedlings by regulating the antioxidant pool and expression of ion transporters. These findings indicate that EPS from B. velezensis HY23 is a potential biostimulant for enhancing plant resistance to salt stress.

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