数字农科院2.0

Insight into the diversity and application characters of endophytes in ramie (Boehmeria nivea L. Gaud)

文献类型： 外文期刊

作者： Xiaomin Xu;Guang Li;Yaoren Zhang;Xin Wang;Zihan Wang;Xueqing Wu;Yanzhou Wang;Touming Liu;Siyuan Zhu

作者机构：

关键词： Bacteria community;Bacteria diversity;Microhabitat;Pseudomonas sp. B4;Ramie endophytes

期刊名称： Industrial Crops and Products

ISSN： 0926-6690

年卷期： 2025 年 230 卷

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收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Endophytes are essential for plant growth and resistance to stress. However, little is known about endophytes of ramie, which is an important fiber crop. Here, to gain insight into ramie endophytes, we collected 180 samples of three varieties ramie across four microhabitats (rhizosphere, root, stem, and leaf) in three geographic locations, and further endophyte Pseudomonas sp. B4 was isolated and its function was analyzed. The results demonstrated that microhabitat was the primary for ramie bacterial assemblage rather than geographic location or ramie variety. For endophytes, Cyanobacteria was the main phylum (>75 %, in the roots, stems, and leaves); Proteobacteria was the secondary phylum, and with relative abundance of 9.08 %, 14.97 % and 16.28 % in the roots, stems and leaves, respectively. The results of LEfSe analysis indicated Sphingomonas and Acidothermus were the biomarkers in the rhizosphere, Clostridia was the biomarker in the roots, and unidentified Chloroplast and Ralstonia were biomarkers in the stems and leaves, respectively. From the rhizosphere to the leaves, the co-occurrence network complexity gradually decreased, and the co-occurrence network of the leaves was the simplest. Proteobacteria was the key taxa according to the co‑occurrence networks analysis results. In addition, Pseudomonas sp. B4, which belongs to γ-Proteobacteria, was isolated from ramie plants and could increase plant height (19.92 %), stem diameter (10.39 %) and fiber yield (21.67 %) remarkably. Overall, this study elucidated the composition and potential functions of ramie endophytes. And, the endophyte B4 improved ramie growth and fiber yield. These findings provide a basis for understanding endophyte assembly and for managing crop microbiome for sustainable agriculture.

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