Título:	Identification of coffee WRKY transcription factor genes and expression in resistance responses to pathogens.
Autoria:	RAMIRO, D. JALLOUL, A. PETITOT, A-S. SA, M. F. G. de MALUF, M. P. FERNANDEZ, D.
Afiliação:	DANIEL RAMIRO, CIRAD; AIDA JALLOUL, University of Damascus; ANNE-SOPHIE PETITOT, CIRAD; MARIA FATIMA GROSSI DE SA, CENARGEN; MIRIAN PEREZ MALUF, SAPC; DIANA FERNANDEZ, CIRAD.
Ano de publicação:	2010
Referência:	TREE GENETICS & GENOMES, Curitiba, v.6, p.767-781. 2010.
Páginas:	767-781
Conteúdo:	In plants, WRKY proteins are a group of transcription factors existing as a gene superfamily that play important roles in regulation of defense response pathways. To assess the diversity of this protein family in coffee (Coffea spp.), data mining methods were used on a set of around 200,000 coffee expressed sequence tags. A total of 53 different putative WRKY genes were obtained, but only 22 unigenes encoding a protein with a WRKY domain were identified, eight of which are supported by full-length cDNA sequences. Alignment of WRKY domain sequences of the coffee unigenes and 72 Arabidopsis thaliana WRKY genes showed that the 22 coffee WRKY members were distributed among the main A. thaliana WRKY subgroups and shared conserved peptide domains. To assess the involvement of WRKY genes in coffee defense response pathways, their expression was analyzed under biotic (nematode and rust fungus infection), hormonal (salicylic acid, methyl-jasmonate), and wounding treatments, leaf senescence, and fruit development. Five members of WRKY groups IId and III were regulated only by pathogens and hormone treatments. Although a significant correlation of WRKY genes expression after MeJA and rust treatments was observed, expression of coffee genes involved in JA biosynthesis and lipoxygenase (EC 1.13.11.12) activity assays did not support the involvement of JA in the early coffee resistance responses to the rust pathogen. The five WRKY transcription factor members identified might play important roles as regulators of pathogen resistance responses and could be useful for improving coffee tolerance to various biotic stresses.
Thesagro:	Coffea Arábica
NAL Thesaurus:	Regulator genes
Palavras-chave:	Rust disease
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (SAPC)