MYB公司
木质素
类黄酮
基因
转录因子
生物
植物
化学
生物化学
遗传学
抗氧化剂
作者
Li Zhu,Yunxiao Guan,Zhaohe Zhang,Aiping Song,Sumei Chen,Jiafu Jiang,Fadi Chen
标识
DOI:10.1016/j.plaphy.2020.02.010
摘要
R2R3-MYB transcription factors are important regulators of the growth and development of plants. Here, CmMYB8 a chrysanthemum gene encoding an R2R3-MYB transcription factor, was isolated and functionally characterized. The gene was transcribed throughout the plant, but most strongly in the stem. When CmMYB8 was over-expressed, a number of genes encoding components of lignin synthesis were down-regulated, and the plants’ lignin content was reduced. The composition of the lignin in the transgenic plants was also altered, and its S/G ratio was reduced. A further consequence of the over-expression of CmMYB8 was to lessen the transcript abundance of key genes involved in flavonoid synthesis, resulting in a reduced accumulation of flavonoids. The indication is that the CmMYB8 protein participates in the negative regulation of both lignin and flavonoid synthesis.
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