Structural characterization and functional activity of an exopolysaccharide secreted by Rhodopseudomonas palustris GJ-22
文献类型： 外文期刊
作者： Zhai, Zhongying 1 ; Chen, Ang 2 ; Zhou, Hanmei 1 ; Zhang, Deyong 1 ; Du, Xiaohua 2 ; Liu, Qing 3 ; Wu, Xiyang 2 ; Cheng, 1 ;
作者机构： 1.Hunan Univ, Longping Branch, Grad Sch, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, Hunan Plant Protect Inst, Changsha 410125, Peoples R China
3.Agr & Rural Bur Changsha Cty, Changsha 410100, Peoples R China
4.Ecol Environm Testing Ctr Changsha, Changsha 410001, Peoples R China
关键词： Rhodopseudomonas palustris; Exopolysaccharide; Characterization; Induce systemic resistance (ISR)
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）
ISSN： 0141-8130
年卷期： 2021 年 167 卷
页码：
收录情况： SCI
摘要： One water exopolysaccharide, designated G-EPS, was secreted by Rhodopseudomonas palustris GJ-22 culture media. The structure of G-EPS was characterized with HPGPC, GC-MS, methylation, 1D and 2D NMR, along with UV and FT-IR spectrum. The G-EPS molecular weight was 10.026 kilodalton, and is composed of D-mannose (92.8%) and D-glucose (7.2%). The purified G-EPS promoted plant growth and induced systemic resistance against TMV in Nicotiana benthamiana. These results suggested that G-EPS is an important active component of the bio-control capacity of GJ-22. (C) 2020 Published by Elsevier B.V.
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