Composition and Diversity of Endophytic Bacterial Communities in the Seeds of Upland Rice Resources from Different Origin Habitats in China

文献类型： 外文期刊

第一作者： Wang, Zhishan

作者： Wang, Zhishan;Liu, Yang;Li, Ni;Wang, Weiping;Zhu, Yongqiang

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关键词： High-throughput sequencing; Upland rice seed; Endophytic bacteria; Diversity; Environmental factor

期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.64； 五年影响因子：4.469 ）

ISSN： 0721-7595

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收录情况： SCI

摘要： The cultivation of high-quality upland rice, which is known to be drought tolerant and widely adaptable, can help solve the challenges of food and water shortages for the world's rising populations, so it is of great significance to sustainable agricultural development. Certain microbial agents can further enhance plant drought resistance, such as the endophytic bacteria that live in plant seeds without causing infection, making them a vital resource that can improve upland rice cultivation and yield. In this study, high-throughput sequencing technology based on the Illumina MiSeq platform was used to investigate the structure and diversity of endophytic bacterial communities in the seeds of 12 upland rice varieties from different areas in Yunnan Province, China. The results showed that 39 endophytic operational taxonomic units (OTUs) were found to coexist in all samples. At the phylum level, the dominant phyla in the 12 seed samples were Proteobacteria (66.92-99.98%). At the genus level, Pantoea (9.75-99.24%), Pseudomonas (0.11-37.24%), Curtobacterium (0.01-19.90%), Microbacterium (0.01-14.95%), Methylobacterium (0.40-5.86%), Agrobacterium (0.01-4.53%), Sphingomonas (0.04-1.56%), Aurantimonas (0.01-1.45%) and Rhodococcus (0.11-1.09%) were found to be the dominant genera coexisting in all the tested upland rice seeds tested, representing the core microbiota in upland rice seeds. Furthermore, correlation analysis showed that upland rice habitat environmental factors, such as climate, precipitation and altitude, exert significant effects on the composition and diversity of the endophytic bacterial communities in the upland rice seeds. The findings of this study contribute significantly to understanding the relationship between upland rice and its endophytic bacteria, which can be developed to enhance drought tolerance and yield in this important crop.

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