Structural characterization and functional activity of an exopolysaccharide secreted by Rhodopseudomonas palustris GJ-22.
Structural characterization and functional activity of an exopolysaccharide secreted by Rhodopseudomonas palustris GJ-22.
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DOI：
10.1016/j.ijbiomac.2020.11.165
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发表时间：
2020-11
影响因子：
8.2
通讯作者：
Zhongying Zhai;Ang Chen;Hanmei Zhou;Deyong Zhang;Xiaohua Du;Qing Liu;Xiyang Wu;Ju’e Cheng;Lijie Chen;Fang Hu;Yong Liu;P. Su
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文献类型：
--
作者：
Zhongying Zhai;Ang Chen;Hanmei Zhou;Deyong Zhang;Xiaohua Du;Qing Liu;Xiyang Wu;Ju’e Cheng;Lijie Chen;Fang Hu;Yong Liu;P. Su
在红假单胞菌gj -22培养基上分泌一种水外多糖，命名为G-EPS。通过HPGPC、GC-MS、甲基化、1D和2D NMR以及UV和FT-IR对G-EPS的结构进行了表征。G-EPS分子量为10.026千道尔顿，由d-甘露糖（92.8%）和葡萄糖（7.2%）组成。纯化后的G-EPS促进了植物生长，诱导了对烟叶TMV的全身抗性。这些结果表明，G-EPS是GJ-22生物防治能力的重要活性成分。
One water exopolysaccharide, designated G-EPS, was secreted byRhodopseudomonas palustrisGJ-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%) andd-glucose (7.2%). The purified G-EPS promoted plant growth and induced systemic resistance against TMV inNicotiana benthamiana. These results suggested that G-EPS is an important active component of the bio-control capacity of GJ-22.