MAX3/CCD7 is a carotenoid cleavage dioxygenase required for the synthesis of a novel plant signaling molecule
MAX3/CCD7 is a carotenoid cleavage dioxygenase required for the synthesis of a novel plant signaling molecule
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DOI：
10.1016/j.cub.2004.06.061
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发表时间：
2004-07-27
期刊：
影响因子：
9.2
通讯作者：
Leyser, O
中科院分区：
文献类型：
--
作者：
Booker, J;Auldridge, M;Leyser, O
背景资料：植物发育对环境非常敏感，植物激素作为长距离信号，整合发育、遗传和环境输入来调节发育。这是一个很好的例子是在控制拍摄分支，在植物形态的广泛变化，可以在一个单一的基因型中产生的环境和发育cuse.Results：在这里，我们提出了一种新的植物信号分子参与调控拍摄分支的证据。我们表明，MAX3基因的拟南芥是需要生产的移植物传输，高活性的分支抑制剂，是不同于任何以前的特征分支抑制激素。与其提出的功能在一个新的信号分子的合成相一致，我们表明，MAX3编码的质体双加氧酶，可以切割多种类胡萝卜素。结论：我们得出结论，MAX3是必需的一种新的类胡萝卜素衍生的远程信号，调节拍摄分支的合成。
Background: Plant development is exquisitely environmentally sensitive, with plant hormones acting as long-range signals that integrate developmental, genetic, and environmental inputs to regulate development. A good example of this is in the control of shoot branching, where wide variation in plant form can be generated in a single genotype in response to environmental and developmental cues.Results: Here we present evidence for a novel plant signaling molecule involved in the regulation of shoot branching. We show that the MAX3 gene of Arabidopsis is required for the production of a graft-transmissible, highly active branch inhibitor that is distinct from any of the previously characterized branch-inhibiting hormones. Consistent with its proposed function in the synthesis of a novel signaling molecule, we show that MAX3 encodes a plastidic dioxygenase that can cleave multiple carotenoids.Conclusions: We conclude that MAX3 is required for the synthesis of a novel carotenoid-derived long-range signal that regulates shoot branching.