AGAMOUS mediates timing of guard cell formation during gynoecium development
AGAMOUS mediates timing of guard cell formation during gynoecium development
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AGAMOUS 介导雌蕊发育过程中保卫细胞形成的时间
DOI：
10.1101/2023.01.23.525231
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Brazel A
中科院分区：
文献类型：
--
作者：
Brazel A
在拟南芥中，气孔由两个保卫细胞组成，它们控制着中心气孔的孔径，以促进植物与环境之间的气体交换，这在光合作用中尤为重要。虽然叶是开花植物的主要光合器官，但花器官也具有光合作用。在豆科植物中，有证据表明角果光合作用对最佳种子油含量很重要。一组含有MADS DNA结合域的转录因子是必需的，足以赋予花器官的身份。优雅的模型，如花发育的ABCE模型和花四重奏模型，已在描述这些花器官的身份蛋白统治花发育的分子机制。然而，我们缺乏一个完整的了解如何花器官的身份基因与潜在的叶发育程序。在这里，我们表明，MADS结构域转录因子AGAMOUS（AG）抑制气孔发育的雌蕊瓣，使气孔复合体的成熟与受精相一致。我们提出的证据表明，这种调节AG介导的气孔谱系，MUTE的主调节器的直接转录抑制，并显示数据表明，这种相互作用是保守的几个成员之间的拟南芥科。这项工作扩展了我们对花器官形成机制的理解，并提供了一个框架来破译控制花器官光合作用的机制。
InArabidopsis thaliana, stomata are composed of two guard cells that control the aperture of a central pore to facilitate gas exchange between the plant and its environment, which is particularly important during photosynthesis. Although leaves are the primary photosynthetic organs of flowering plants, floral organs are also photosynthetically active. In the Brassicaceae, evidence suggests that silique photosynthesis is important for optimal seed oil content. A group of transcription factors containing MADS DNA binding domains is necessary and sufficient to confer floral organ identity. Elegant models, such as the ABCE model of flower development and the floral quartet model, have been instrumental in describing the molecular mechanisms by which these floral organ identity proteins govern flower development. However, we lack a complete understanding of how the floral organ identity genes interact with the underlying leaf development program. Here, we show that the MADS domain transcription factor AGAMOUS (AG) represses stomatal development on the gynoecial valves, so that maturation of stomatal complexes coincides with fertilization. We present evidence that this regulation by AG is mediated by direct transcriptional repression of a master regulator of the stomatal lineage,MUTE, and show data that suggests this interaction is conserved among several members of the Brassicaceae. This work extends our understanding of the mechanisms underlying floral organ formation and provides a framework to decipher the mechanisms that control floral organ photosynthesis.
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影响因子：
--
作者：
Diarmuid S. Ó’Maoiléidigh;E. Graciet;F. Wellmer
通讯作者：
F. Wellmer
DOI：
10.1073/pnas.1411766111
发表时间：
2014-10-28
影响因子：
11.1
作者：
Davies, Kelli A.;Bergmann, Dominique C.
通讯作者：
Bergmann, Dominique C.
影响因子：
7.4
作者：
Kivivirta, Kimmo, I;Herbert, Denise;Becker, Annette
通讯作者：
Becker, Annette
影响因子：
4.6
作者：
John L. Bowman;David R. Smyth;E. Meyerowitz
通讯作者：
John L. Bowman;David R. Smyth;E. Meyerowitz
影响因子：
4.2
作者：
Torii KU
通讯作者：
Torii KU