Local Auxin Biosynthesis Is a Key Regulator of Plant Development
Local Auxin Biosynthesis Is a Key Regulator of Plant Development
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DOI：
10.1016/j.devcel.2018.09.022
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发表时间：
2018-11-05
影响因子：
11.8
通讯作者：
Stepanova, Anna N.
中科院分区：
文献类型：
--
作者：
Brumos, Javier;Robles, Linda M.;Stepanova, Anna N.
生长素是一种主要的植物激素，控制植物发育的许多方面，并协调植物对环境的反应。生长素的形态发生梯度决定细胞命运并构成植物表型可塑性的基础。生长素极性运输在最大生长素生成中起着重要作用。WEI 8/TAR和YUC家族生长素生物合成基因的时空表达模式的发现表明，生长素的局部产生可能有助于生长素最大值的形成。在此，我们系统地阐述了本地生长素的生物合成在植物发育和响应胁迫植物激素乙烯的时空模式的WEI 8。我们的研究表明，当地生长素的生物合成和运输的协同作用，并单独为根分生组织的维护。相反，花的生育力和根对乙烯的反应需要当地生长素的生产，不能完全补偿运输的形态发生生长素极大的一代。
Auxin is a major phytohormone that controls numerous aspects of plant development and coordinates plant responses to the environment. Morphogenic gradients of auxin govern cell fate decisions and underlie plant phenotypic plasticity. Polar auxin transport plays a central role in auxin maxima generation. The discovery of the exquisite spatiotemporal expression patterns of auxin biosynthesis genes of the WEI8/TAR and YUC families suggested that local auxin production may contribute to the formation of auxin maxima. Herein, we systematically addressed the role of local auxin biosynthesis in plant development and responses to the stress phytohormone ethylene by manipulating spatiotemporal patterns of WEI8. Our study revealed that local auxin biosynthesis and transport act synergistically and are individually dispensable for root meristem maintenance. In contrast, flower fertility and root responses to ethylene require local auxin production that cannot be fully compensated for by transport in the generation of morphogenic auxin maxima.