Biotechnology Bulletin ›› 2024, Vol. 40 ›› Issue (5): 225-236.doi: 10.13560/j.cnki.biotech.bull.1985.2023-1088

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Comparison and Analysis of Endophytic Bacterial Communities in Different Perennial Rice Varieties

KONG De-ting(), QI Xiao-han, LIU Xing-lei, LI Li-ping, HU Feng-yi, HUANG Li-yu, QIN Shi-wen()   

  1. Key Laboratory of Biology and Germplasm Innovation of Perennial Rice of Ministry of Agriculture and Rural Affairs, College of Agronomy, Yunnan University, Kunming 650500
  • Received:2023-11-20 Online:2024-05-26 Published:2024-06-13
  • Contact: QIN Shi-wen E-mail:kdt7798@163.com;shiwenqin@ynu.edu.cn

Abstract:

Objective】To explore the structure and potential functions of endophytic bacterial microbiota in perennial rice, as well as the relationship between endophytic bacteria in perennial rice and host agronomic traits. 【Method】The diversity, composition and metabolic function of endophytic bacteria in different in perennial rice varieties(PR23, PR25, and PR107)were characterized via Illumina sequencing of the 16S rRNA gene. 【Result】These results showed that the beta diversity of endophytic bacterial communities significantly differed among the distinct genotypes of perennial rice. Due to the differentiation of tissue structures, perennial rice varieties shaped distinctive ecological niches for endophytes in different tissue compartments. Proteobacteria, Firmicutes and Bacteroidetes were the dominant endophytic bacterial phyla in the underground tissues of perennial rice, while Proteobacteria, Actinobacteria and Firmicutes were the dominant phyla in the aboveground tissues. These perennial rice varieties had different endophytic bacterial taxa with specific amplicon sequence variants(ASVs), dominant genera and specific biomarkers. The endophytic bacterial communities of perennial rice were reassembled for various metabolic functions, including biosynthesis, degradation/utilization/assimilation, detoxification, generation of precursor metabolite and energy, glycan pathways, macromolecule modification and metabolic clusters. Significantly different MetaCyc pathways of endophytic bacteria in perennial rice varieties with distinct genotypes were involved in the biosynthesis and degradation of esters, alcohols and polysaccharides. 【Conclusion】These results indicated host genotypes and tissues differentiation affect the community structure, species composition and metabolic function of endophytic bacteria in perennial rice.

Key words: perennial rice, endophytic bacteria, community structure, 16S rRNA sequencing