A glucomannan produced by Bacillus velezensis HY23 and its growth promoting effect on soybeans under salt stress.
Int J Biol Macromol
; 275(Pt 1): 133474, 2024 Aug.
Article
em En
| MEDLINE
| ID: mdl-38945338
ABSTRACT
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 8218 and was identified as glucomannan. Combined with the nuclear magnetic resonance (NMR) analysis, EPS from HY23 had a backbone of â2)-α-D-Manp-(1 â and â2,6)-α-D-Manp-(1 â branched at C-6 with terminal α-(3-O-Me)-D-Manp-(1 â and â6)-α-D-Manp-(1 â residues as the side chain. A certain amount of ß-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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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Glycine max
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Bacillus
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Estresse Salino
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Mananas
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2024
Tipo de documento:
Article