MeMYB26, a drought-responsive transcription factor in cassava (Manihot esculenta Crantz)

• Autor(a) principal: Wang,Bin
• Data de Publicação: 2021
• Outros Autores: Guo,Xin, Zhao,Pingjuan, Liao,Wenbin, Zeng,Changying, Li,Kai, Zhou,Yuxun, Xiao,Junhua, Ruan,Mengbin, Peng,Ming, Bai,Yang, Chen,Ye
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Crop Breeding and Applied Biotechnology
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-70332021000100203
• topic: MYB; drought resistance; natural variation; candidate association study; coexpression interaction network

Abstract Cassava (Manihot esculenta Crantz) is worldwide the sixth-largest food crop and highly drought resistant. The expression of the myeloblastosis (MYB) family protein MeMYB26 in cassava was previously reported to be significantly up-regulated under water deficit. To study the basic characterization, natural variations and potential functions of MeMYB26 for drought resistance in cassava, the protein was subjected to bioinformatics analysis, multiplex-PCR with next-generation sequencing and candidate association studies. The results indicated that MeMYB26 is a typical transcription factor, with two MYB DNA-binding and transcriptional activation domains. One stop-gained and five nonsynonymous variations in the genomic region of MeMYB26 were significantly associated with drought resistance traits. The results of the scale-free coexpression network showed that the MeMYB26 gene plays a critical role in plant stress resistance, growth and biomass development. It was concluded that MeMYB26 is a reliable candidate gene associated with drought tolerance and biomass storage in cassava.