Structural characterization and functional activity of an exopolysaccharide secreted by Rhodopseudomonas palustris GJ-22

被引：36
|
作者：
Zhai, Zhongying [1 ]
Chen, Ang [2 ]
Zhou, Hanmei [1 ]
Zhang, Deyong [1 ,2 ]
Du, Xiaohua [2 ]
Liu, Qing [3 ]
Wu, Xiyang [2 ]
Cheng, Ju'e [2 ]
Chen, Lijie [1 ]
Hu, Fang [4 ]
Liu, Yong [1 ,2 ]
Su, Pin [2 ]
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
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2021年 / 167卷
基金：
美国国家科学基金会;
关键词：
Rhodopseudomonas palustris; Exopolysaccharide; Characterization; Induce systemic resistance (ISR); POLYSACCHARIDES; EXPRESSION; RESISTANCE;
D O I：
10.1016/j.ijbiomac.2020.11.165
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
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.
引用
收藏
页码：160 / 168
页数：9
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