Biotechnology Bulletin ›› 2019, Vol. 35 ›› Issue (10): 46-56.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0901

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Biological Nitrogen Fixation in Association with Sugarcane:Retrospect and Prospect

LIN Li1, LI Yang-rui1, AN Qian-li2   

  1. 1. Sugarcane Research Institute,Guangxi Academy of Academy of Agricultural Sciences,Nanning 530007;
    2. Institute of Biotechnology,Zhejiang University,Hangzhou 310058
  • Received:2019-09-25 Online:2019-10-26 Published:2019-09-30

Abstract: In Brazil certain sugarcane varieties are able to obtain large contributions of nitrogen via biological nitrogen fixation. The research on rhizosphere and endophytic diazotrophs associated with sugarcane led the research on associative nitrogen fixation in non-legume plants. The endophytic diazotroph Gluconacetobacter diazotrophicus shows some distinctive characteristics,and the diazotroph consortium containing G. diazotrophicus,Herbaspirillum seropedicae,Herbaspirillum rubrisubalbicans,Nitrospirillum amazonense and Paraburkholderia tropica is able to fix nitrogen in association with sugarcane and promote sugarcane growth. Recent studies reveal that some diazotrophs belonging to Bradyrhizobium,Rhizobium and other rhizobial genera are in the core nitrogen-fixing microbiota associated with sugarcane and actively express the gene encoding dinitrogenase reductase in sugarcane without nodulation. This review introduces some featured studies on these diazotrophs associated with sugarcane and discusses the strategies to optimize the associative nitrogen fixation with sugarcane.

Key words: nitrogen fixation, non-legume plants, endophytic bacteria, rhizobia, core microbiota, synthetic community