生物
拟南芥
突变体
木质素
木聚糖
干细胞
拟南芥
表型
细胞生物学
染色质免疫沉淀
次生细胞壁
基因
细胞壁
植物
维管束
纤维素
基因表达
发起人
遗传学
生物化学
作者
Wei Li,Zhaoxia Tian,Diqiu Yu
出处
期刊:Plant Science
[Elsevier]
日期:2015-07-01
卷期号:236: 205-213
被引量:52
标识
DOI:10.1016/j.plantsci.2015.04.004
摘要
Stems are important for plants to grow erectly. In stems, sclerenchyma cells must develop secondary cell walls to provide plants with physical support. The secondary cell walls are mainly composed of lignin, xylan and cellulose. Deficiency of overall stem development could cause weakened stems. Here we prove that WRKY13 acts in stem development. The wrky13 mutants take on a weaker stem phenotype. The number of sclerenchyma cells, stem diameter and the number of vascular bundles were reduced in wrky13 mutants. Lignin-synthesis-related genes were repressed in wrky13 mutants. Chromatin immunoprecipitation assays proved that WRKY13 could directly bind to the promoter of NST2. Taken together, we proposed that WRKY13 affected the overall development of stem. Identification of the role of WRKY13 may help to resolve agricultural problems caused by weaker stems.
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