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

Zhongying Zhai | Ang Chen | Hanmei Zhou | Deyong Zhang | Xiaohua Du | Qing Liu | Xiyang Wu | Ju'e Cheng | Lijie Chen | Fang Hu | Yong Liu | Pin Su
International journal of biological macromolecules | 2021

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.

Pubmed ID: 33249155

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Origin (tool)

RRID:SCR_014212

Software application for data analysis and graphing. Origin contains a variety of different graph types, including statistical plots, 2D and 3D vector graphs, and counter graphs. More advance version is OriginPro which offers advanced analysis tools and Apps for Peak Fitting, Surface Fitting, Statistics and Signal Processing.

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