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A PeMYB-like gene induced by brassinosteroids regulates cellulose synthesis in tobacco
Xilong Du,Shan Liu,Chang Ma,Mingguo Ma 한국식물생명공학회 2019 Plant biotechnology reports Vol.13 No.2
MYB is a well-known key transcriptional regulator involved in plant development and metabolism. In this study, a new MYB gene was isolated from Phyllostachys edulis and named PeMYB-like. A close link between brassinosteroids (BRs) and PeMYB-like gene expression was suggested in this study. Functional characterization of PeMYB-like was elucidated through overexpression of this gene in tobacco. Expression of PeMYB-like in ten independent transgenic tobacco lines was quantified by semi-quantitative RT-PCR. The expression levels NtCESA1 and NtCESA2 in transgenic plants were higher than that in control plants. The transgenic lines also showed a significant increase in cellulose content, suggesting that PeMYB-like may enhance cellulose biosynthesis through the upregulation of genes encoding enzymes involved in cellulose biosynthesis in plant stems. Our study indicated that there may be a close link between PeMYB-like gene expression and cellulose biosynthesis; moreover, BR signaling pathway might be involved in cellulose biosynthesis processes through the regulation of the MYB gene transcription.
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