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Root Endophyte Shift and Key Genera Discovery in Rice under Barnyardgrass Stress

文献类型： 外文期刊

作者： Li, Shuyan 1 ; Yan, Qiling 1 ; Wang, Jieyu 1 ; Jiang, Huidan 1 ; Li, Zuren 1 ; Peng, Qiong 1 ;

作者机构： 1.Hunan Univ, Long Ping Branch, Grad Sch, Changsha 410125, Peoples R China

2.Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, Changsha 410125, Peoples R China

关键词： rice; Echinochloa crus-galli; biotic stress; endophytic bacterium; endophytic fungus; phylogenetic investigation of communities by reconstruction of unobserved states; FUNGuild test

期刊名称：RICE SCIENCE （ 影响因子：4.8； 五年影响因子：5.5 ）

ISSN： 1672-6308

年卷期： 2023 年 30 卷 2 期

页码：

收录情况： SCI

摘要： Despite increasing knowledge of barnyardgrass (Echinochloa crus-galli) interference with rice, relatively little is known how endophytes improve the ability of rice against barnyardgrass stress. Here, we provided a detailed temporal characterization of rice root-associated microbiomes during co-cultivation with barnyardgrass and a comparison with the microbiomes of weed-free rice plants. Alpha diversity analysis indicated that barnyardgrass had the opposite effects on endophytic bacteria and fungi in rice roots, in terms of the community diversity, richness and coverage at the rice seedling stage. Principal coordinate analysis showed that barnyardgrass had only a minor effect on the community composition of endophytes in rice roots at the rice seedling stage, but showed a significant and maximum interference at the heading stage. Rice recruited many endophytes to resist biotic stress from barnyardgrass, especially for fungi. PICRUSt (phylogenetic investigation of communities by reconstruction of unobserved states) predictive analysis indicated that 23 metabolic pathways of bacteria were overrepresented in rice. In addition, the main trophic mode of fungi was pathotroph according to FUNGuild analysis. A positive correlation between bacteria and fungi in rice roots was found via network analysis. Anaeromyxobacter, Azospira and Pseudolabrys were the vital bacteria, Phaeosphaeria and Funneliformis were the dominant fungi in maintaining the stability of the ecological network. These results provided data and a theoretical basis for the in-depth understanding of what role endophytes play in rice resistance to barnyardgrass stress and will have implications on the resistance of rice biotic stress root microbiota.

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