Details

Autor(en) / Beteiligte

• Denis, Erwan
• Kbiri, Nadia
• Mary, Viviane
• Claisse, Gaëlle
• Conde e Silva, Natalia
• Kreis, Martin
• Deveaux, Yves

Titel

WOX 14 promotes bioactive gibberellin synthesis and vascular cell differentiation in Arabidopsis

Ist Teil von

• The Plant journal : for cell and molecular biology, 2017-05, Vol.90 (3), p.560-572

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Summary Procambial and cambial stem cells provide the initial cells that allow the formation of vascular tissues. WOX 4 and WOX 14 have been shown to act redundantly to promote procambial cell proliferation and differentiation. Gibberellins ( GA s), which have an important role in wood formation, also stimulate cambial cell division. Here we show that the loss of WOX 14 function phenocopies some traits of GA ‐deficient mutants that can be complemented by exogenous GA application, whereas WOX 14 overexpression stimulates the expression of GA 3ox anabolism genes and represses GA 2ox catabolism genes, promoting the accumulation of bioactive GA . More importantly, our data clearly indicate that WOX 14 but not WOX 4 promotes vascular cell differentiation and lignification in inflorescence stems of Arabidopsis. Significance Statement Vascular stem cell proliferation and differentiation involve many signaling pathways. WOX genes play a central role in these processes. The data presented here indicate that WOX14 promotes bioactive GA biosynthesis during stem maturation in Arabidopsis and underline the complex interplay between WOX genes and hormonal cues that occurs during wood formation.