Patterning a Leaf by Establishing Polarities.
Patterning a Leaf by Establishing Polarities.
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DOI：
10.3389/fpls.2020.568730
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发表时间：
2020
影响因子：
5.6
通讯作者：
Xu M
中科院分区：
文献类型：
--
作者：
Manuela D;Xu M
叶片是大多数陆地植物进行光合作用的主要器官，叶片的结构优化是为了最大限度地捕获阳光和交换气体。在叶片发育过程中，形成了三个极性轴，即近轴-背轴、近轴-远轴和中轴-外侧轴，从而形成一个平坦的叶片，具有较大的光合作用面积，叶片在叶柄上伸展，以获得最大的阳光。正面细胞是细长的，紧密排列的细胞，有许多叶绿体，它们的命运由HD-ZIP III和相关因素决定。背轴细胞更圆，排列松散，其命运由YABBY家族和KANADI家族蛋白建立和维持。叶片正面和背面调节因子的活性由不对称叶片2和生长素协调。近远轴的建立涉及BTB/POZ结构域蛋白BLADE-ON-PETIOLE1和2，而同源盒基因PRESSED FLOWER和wuschelrelated HOMEOBOX1介导叶片沿中外侧轴的发育。本文综述了近年来叶片极性建立的研究进展，重点介绍了叶片极性建立所涉及的调控网络。
Leaves are the major organ for photosynthesis in most land plants, and leaf structure is optimized for the maximum capture of sunlight and gas exchange. Three polarity axes, the adaxial–abaxial axis, the proximal-distal axis, and the medial-lateral axis are established during leaf development to give rise to a flattened lamina with a large area for photosynthesis and blades that are extended on petioles for maximum sunlight. Adaxial cells are elongated, tightly packed cells with many chloroplasts, and their fate is specified by HD-ZIP III and related factors. Abaxial cells are rounder and loosely packed cells and their fate is established and maintained by YABBY family and KANADI family proteins. The activities of adaxial and abaxial regulators are coordinated by ASYMMETRIC LEAVES2 and auxin. Establishment of the proximodistal axis involves the BTB/POZ domain proteins BLADE-ON-PETIOLE1 and 2, whereas homeobox genes PRESSED FLOWER and WUSCHEL-RELATED HOMEOBOX1 mediate leaf development along the mediolateral axis. This review summarizes recent advances in leaf polarity establishment with a focus on the regulatory networks involved.
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影响因子：
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