赤霉素
拟南芥
生物
拟南芥
细胞生物学
抑制因子
植物
遗传学
转录因子
基因
突变体
作者
Nicolas Arnaud,Thomas Girin,Karim Sorefan,Sara Fuentes,Thomas A. Wood,Tom Lawrenson,Robert Sablowski,Lars Østergaard
出处
期刊:Genes & Development
[Cold Spring Harbor Laboratory]
日期:2010-10-01
卷期号:24 (19): 2127-2132
被引量:175
摘要
The Arabidopsis basic helix–loop–helix (bHLH) proteins INDEHISCENT (IND) and ALCATRAZ (ALC) specify tissues required for fruit opening that have major roles in seed dispersal and plant domestication. Here, we show that synthesis of the phytohormone gibberellin is a direct and necessary target of IND, and that ALC interacts directly with DELLA repressors, which antagonize ALC function but are destabilized by gibberellin. Thus, the gibberellin/DELLA pathway has a key role in patterning the Arabidopsis fruit, and the interaction between DELLA and bHLH proteins, previously shown to connect gibberellin and light responses, is a versatile regulatory module also used in tissue patterning.
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