Members of the ethylene signalling pathway are regulated in sugarcane during the association with nitrogen-fixing endophytic bacteria

被引:47
作者
Cavalcante, J. J. V.
Vargas, C.
Nogueira, E. M.
Vinagre, F.
Schwarcz, K.
Baldani, J. I.
Ferreira, P. C. G.
Hemerly, A. S. [1 ]
机构
[1] Univ Fed Rio de Janeiro, Inst Bioquim Med, BR-21941590 Rio de Janeiro, Brazil
[2] Inst Pesquisas, Lab Biol Mol Plantas, BR-22460030 Rio De Janeiro, Brazil
[3] EMBRAPA, CNPAB, BR-23851970 Seropedica, RJ, Brazil
关键词
biological nitrogen fixation; diazotrophic endophytes; ERF; ethylene-responsive factor; ethylene signalling; plant-microbe interaction; receptor; sugarcane;
D O I
10.1093/jxb/erl242
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Nitrogen-fixing bacteria have been isolated from sugarcane in an endophytic and beneficial interaction that promotes plant growth. In this work, for the first time, the involvement of ethylene signalling in this interaction was investigated by molecular characterizing members of this pathway in sugarcane. The expression pattern of a putative ethylene receptor (SCER1) and two putative ERF transcription factors (SCERF1 and SCERF2) show exclusive modulation in plants inoculated with the diazotrophic endophytes. The gene expression profile of SCER1, SCERF1, and SCERF2 is differentially regulated in sugarcane genotypes that can establish efficient or inefficient associations with diazotrophic micro-organisms, exhibiting high or low biological nitrogen fixation (BNF) rates, respectively. In addition, SCER1, SCERF1, and SCERF2 expression is different in response to interactions with pathogenic and beneficial micro-organisms. Taken together, that data suggest that SCER1, SCERF1, and SCERF2 might participate in specific ethylene signalling cascade(s) that can identify a beneficial endophytic association, modulating sugarcane responses toward the diazotrophic endophytes.
引用
收藏
页码:673 / 686
页数:14
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