Abstract
Glucosinolates are a class of secondary metabolites produced by Brassicaceae plants, serving as antiherbivore compounds. Glucosinolates are classified according to the use of different amino acids as the biosynthetic precursors: aliphatic glucosinolates are derived from methionine, and indolic glucosinolates are produced from tryptophan. It has been reported that a variety of MYB-like transcription factors are involved in the regulation of glucosinolate biosyntheses. MYB38/ATR1, MYB51, and MYB122 are involved in the regulation of indole glucosinolate biosyntheses, while MYB28, MYB29, and MYB76 are implicated in the aliphatic glucosinolate biosyntheses.
Here, we report the identification of a novel transcription factor involved in the gene expression network regulated by these previously characterized MYB transcription factors. We discuss possible regulation mechanisms of the glucosinolate biosyntheses involving this newly identified transctiption factor in terms of glucosinolate profiling analyses and gene expression profiling studies.
