Journal
PLANT SCIENCE
Volume 229, Issue -, Pages 32-42Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2014.08.005
Keywords
GmMYB; Phylogeny; Biotic stresses; Phakopsora pachyrhizi; RT-qPCR; Resistance
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Funding
- CNPq (National Council for Scientific and Technological Development) [577933/2008-6, 402578/2011-2]
- EMBRAPA (Govt. of Brazil)
- CAPES (Coordenacao de Aperfeicoamento do Pessoal de Nivel Superior)
- CAPES
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Myb genes constitute one of the largest transcription factor families in the plant kingdom. Soybean MYB transcription factors have been related to the plant response to biotic stresses. Their involvement in response to Phakopsora pachyrhizi infection has been reported by several transcriptional studies. Due to their apparently highly diverse functions, these genes are promising targets for developing crop varieties resistant to diseases. In the present study, the identification and phylogenetic analysis of the soybean R2R3-MYB (GmMYB) transcription factor family was performed and the expression profiles of these genes under biotic stress were determined. GmMYBs were identified from the soybean genome using bioinformatic tools, and their putative functions were determined based on the phylogenetic tree and classified into subfamilies using guides AtMYBs describing known functions. The transcriptional profiles of GmMYBs upon infection with different pathogen were revealed by in vivo and in silico analyses. Selected target genes potentially involved in disease responses were assessed by RT-qPCR after different times of inoculation with P. pachyrhizi using different genetic backgrounds related to resistance genes (Rpp2 and Rpp5). R2R3-MYB transcription factors related to lignin synthesis and genes responsive to chitin were significantly induced in the resistant genotypes. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
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