Expression profiles of transcription factors related to glucosinolate biosynthesis and stress response in eight subspecies of .

is a polyploid species with phenotypically diverse cultivated subspecies. Glucosinolates (GSLs) are secondary metabolites that contribute to anticarcinogenic activity and plant defense in Brassicaceae. Previously, complete coding sequences of 13 transcription factors (TFs) related to GSL biosynthesis were identified in the genome. In the present study, we investigated GSL content and expression levels of these TFs in 38 accessions belonging to eight subspecies of . Twelve identified GSLs were detected and were classified into three chemical groups based on patterns of GSL content and expression profiles of the TFs. GSL content and TF expression levels differed among genotypes, including subspecies , and . , and positively regulated GSL content in 38 accessions. Furthermore, expression levels of s and increased under most abiotic and biotic stress treatments. The three paralogs also showed drastically increased expression levels after infection with . The results of the present study improve our understanding of the functional diversity of these 13 TFs during the evolution of polyploid .