Activation of secondary cell wall biosynthesis by miR319-targeted TCP4 transcription factor
Sun, Xudong1,2,3; Wang, Chongde4; Xiang, Nan1,2,3; Li, Xiong1,2,3; Yang, Shihai1,2,3; Du, JianCan1,2,3; Yang, Yongping1,2,3; Yang, Yunqiang1,2,3
2017-10-01
发表期刊PLANT BIOTECHNOLOGY JOURNAL
ISSN1467-7644
卷号15期号:10页码:1284-1294
摘要The overexpression of miR319 in plants results in delayed senescence, and high levels of miR319-targeted TCP4 transcription factor cause premature onset of this process. However, the underlying mechanisms of this pathway remain elusive. Here, we found that miR319 overexpression results in a decrease in TCP4 abundance and secondary cell wall formation in the stem. Conversely, constitutive expression of miR319-resistant TCP4 promotes secondary cell wall formation, indicating that miR319-mediated TCP4 controls secondary cell wall formation during development. Further analysis revealed that TCP4 might directly bind the promoter of VND7 to activate its expression, which triggers the expression of a VND7 transcriptional network associated with secondary cell wall biosynthesis and programmed cell death and accelerates vessel formation. In addition, the development process gradually increased TCP4 expression. These results suggest that miR319 and its target TCP4 can act as switches that turn on secondary cell wall synthesis and programmed cell death.
关键词Mir319 Tcp4 Transcription Factor Secondary Cell Wall Biosynthesis Xylem Vessel Element Differentiation
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/60466
专题植物化学与西部植物资源持续利用国家重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Plant Germplasm & Genom Ctr, Germplasm Bank Wild Species, Kunming, Yunnan, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res Kunming, Kunming Inst Bot, Kunming, Yunnan, Peoples R China
4.Yunnan Agr Univ, Coll Plant Protect, Kunming, Yunnan, Peoples R China
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Sun, Xudong,Wang, Chongde,Xiang, Nan,et al. Activation of secondary cell wall biosynthesis by miR319-targeted TCP4 transcription factor[J]. PLANT BIOTECHNOLOGY JOURNAL,2017,15(10):1284-1294.
APA Sun, Xudong.,Wang, Chongde.,Xiang, Nan.,Li, Xiong.,Yang, Shihai.,...&Yang, Yunqiang.(2017).Activation of secondary cell wall biosynthesis by miR319-targeted TCP4 transcription factor.PLANT BIOTECHNOLOGY JOURNAL,15(10),1284-1294.
MLA Sun, Xudong,et al."Activation of secondary cell wall biosynthesis by miR319-targeted TCP4 transcription factor".PLANT BIOTECHNOLOGY JOURNAL 15.10(2017):1284-1294.
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