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Article

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

by
Zheng Li
1,2,
Ahmed R. Henawy
1,3,
Asmaa A. Halema
1,4,
Qiuling Fan
1,
Deqiang Duanmu
1,* and
Renliang Huang
2,*
1
State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
2
National Engineering Research Center of Rice (Nanchang), Key Laboratory of Rice Physiology and Genetics of Jiangxi Province, Rice Research Institute, Jiangxi Academy of Agriculture Sciences, Nanchang 330200, China
3
Department of Microbiology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
4
Department of Genetics, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2022, 23(18), 10769; https://doi.org/10.3390/ijms231810769
Submission received: 14 July 2022 / Revised: 9 September 2022 / Accepted: 12 September 2022 / Published: 15 September 2022
(This article belongs to the Special Issue Nitrogen with Plant Growth and Development)
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Abstract

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

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MDPI and ACS Style

Li, Z.; Henawy, A.R.; Halema, A.A.; Fan, Q.; Duanmu, D.; Huang, R. A Wild Rice Rhizobacterium Burkholderia cepacia BRDJ Enhances Nitrogen Use Efficiency in Rice. Int. J. Mol. Sci. 2022, 23, 10769. https://doi.org/10.3390/ijms231810769

AMA Style

Li Z, Henawy AR, Halema AA, Fan Q, Duanmu D, Huang R. A Wild Rice Rhizobacterium Burkholderia cepacia BRDJ Enhances Nitrogen Use Efficiency in Rice. International Journal of Molecular Sciences. 2022; 23(18):10769. https://doi.org/10.3390/ijms231810769

Chicago/Turabian Style

Li, Zheng, Ahmed R. Henawy, Asmaa A. Halema, Qiuling Fan, Deqiang Duanmu, and Renliang Huang. 2022. "A Wild Rice Rhizobacterium Burkholderia cepacia BRDJ Enhances Nitrogen Use Efficiency in Rice" International Journal of Molecular Sciences 23, no. 18: 10769. https://doi.org/10.3390/ijms231810769

APA Style

Li, Z., Henawy, A. R., Halema, A. A., Fan, Q., Duanmu, D., & Huang, R. (2022). A Wild Rice Rhizobacterium Burkholderia cepacia BRDJ Enhances Nitrogen Use Efficiency in Rice. International Journal of Molecular Sciences, 23(18), 10769. https://doi.org/10.3390/ijms231810769

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