Biotechnology Bulletin ›› 2019, Vol. 35 ›› Issue (10): 18-24.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0742

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Research Progress of Horizontal Gene Transfer in Rhizobia Evolution

CHEN Xue-lian, JIANG Gao-fei, ZHONG Zeng-tao   

  1. College of Life Science,Nanjing Agricultural University,Nanjing Agricultural University,Nanjing 210095
  • Received:2019-08-19 Online:2019-10-26 Published:2019-09-30

Abstract: Legume-Rhizobium symbiosis is the most important biological nitrogen fixation system favoring the crop production worldwide. This symbiotic interaction is highly specific. Each rhizobium strain only forms a symbiotic association with a specific group of legumes,and vice versa. Recently,horizontal gene transfer(HGT)of symbiotic genes and within-host adaption has been well documented as major drivers of rhizobia evolution. This review summarizes the mechanisms and roles of HGT in rhizobia evolution and the extension of their host range,discusses the issues of strains with symbiotic traits building symbiotic systems and amenable solutions,which provides clues for the better application of symbiotic nitrogen fixation in agricultural production.

Key words: horizontal gene transfer, rhizobium, symbiotic nitrogen fixation, adaptive evolution