Gibberellins control fruit patterning in Arabidopsis thaliana

作者：Nicolas Arnaud, Thomas Girin, Karim Sorefan, Sara Fuentes, Thomas A. Wood, Tom Lawrenson, Robert Sablowski, Lars Østergaard · 发表于：Genes & Development · 年份：2010 · DOI：10.1101/gad.593410 · 被引用次数：210 · 研究领域：Plant Molecular Biology Research、Plant Reproductive Biology、Plant Gene Expression Analysis

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.