WOX14 promotes bioactive gibberellin synthesis and vascular cell differentiation in Arabidopsis
WOX14 promotes bioactive gibberellin synthesis and vascular cell differentiation in Arabidopsis
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DOI：
10.1111/tpj.13513
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发表时间：
2017-05-01
期刊：
影响因子：
7.2
通讯作者：
Deveaux, Yves
中科院分区：
文献类型：
--
作者：
Denis, Erwan;Kbiri, Nadia;Deveaux, Yves
前形成层和形成层干细胞提供了允许血管组织形成的初始细胞。WOX4和WOX14已经显示出冗余地促进原形成层细胞增殖和分化。赤霉素（GAs）在木材形成中具有重要作用，也能刺激形成层细胞分裂。在这里，我们表明，WOX14功能的丧失表型的GA缺陷的突变体，可以补充外源GA应用的一些特征，而WOX14过表达刺激的GA3ox促性腺激素基因的表达和抑制GA2ox促性腺激素基因，促进生物活性GA的积累。更重要的是，我们的数据清楚地表明，WOX14，而不是WOX4促进维管细胞分化和木质化在拟南芥花序茎。
Procambial and cambial stem cells provide the initial cells that allow the formation of vascular tissues. WOX4 and WOX14 have been shown to act redundantly to promote procambial cell proliferation and differentiation. Gibberellins (GAs), which have an important role in wood formation, also stimulate cambial cell division. Here we show that the loss of WOX14 function phenocopies some traits of GA-deficient mutants that can be complemented by exogenous GA application, whereas WOX14 overexpression stimulates the expression of GA3ox anabolism genes and represses GA2ox catabolism genes, promoting the accumulation of bioactive GA. More importantly, our data clearly indicate that WOX14 but not WOX4 promotes vascular cell differentiation and lignification in inflorescence stems of Arabidopsis.