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A Wild Rice Rhizobacterium Burkholderia cepacia BRDJ Enhances Nitrogen Use Efficiency in Rice

文献类型： 外文期刊

作者： Li, Zheng 1 ; Henawy, Ahmed R. 1 ; Halema, Asmaa A. 1 ; Fan, Qiuling 1 ; Duanmu, Deqiang 1 ; Huang, Renliang 2 ;

作者机构： 1.Huazhong Agr Univ, Coll Life Sci & Technol, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China

2.Jiangxi Acad Agr Sci, Natl Engn Res Ctr Rice Nanchang, Rice Res Inst, Key Lab Rice Physiol & Genet Jiangxi Prov, Nanchang 330200, Jiangxi, Peoples R China

3.Cairo Univ, Fac Agr, Dept Microbiol, Giza 12613, Egypt

4.Cairo Univ, Fac Agr, Dept Genet, Giza 12613, Egypt

关键词： plant growth-promoting rhizobacterium; biological nitrogen fixation; nitrogen use efficiency; wild rice; Burkholderia; comparative genomics

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 18 期

页码：

收录情况： SCI

摘要： Rice domestication has dramatically improved its agronomic traits, albeit with unavoidable significantly reduced genetic diversity. Dongxiang common wild rice, the wild rice species distributed in northernmost China, exhibits excellent resistance against stress and diseases and provides a rich genetic resource for rice breeding. Most of the studies focus on the function of the plant genes, often disregarding the role of the root microbes associated with the plants. In this work, we isolated a Burkholderia strain from the root of Dongxiang wild rice, which we identified as Burkholderia cepacia BRDJ, based on a phylogenetic analysis. This strain promoted the rice growth under greenhouse conditions. The grain yield was higher in a rice line containing a small genomic fragment derived from the Dongxiang wild rice, compared to the indica rice cultivar Zhongzao 35. This new strain also increased the plant biomass under limiting nitrogen conditions. Interestingly, this strain had a differential effect on indica and japonica rice varieties under full nitrogen supply conditions. By genome sequencing and comparison with another two B. cepacia strains, we observed enriched genes related with nitrogen fixation and phytohormone and volatiles biosynthesis that may account for the growth-promoting effects of the BRDJ. BRDJ has the potential to be used as a biofertilizer in promoting nitrogen use efficiency and overall growth in rice.

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