Organ-specific effects of brassinosteroids on stomatal production coordinate with the action of Too Many Mouths.
Organ-specific effects of brassinosteroids on stomatal production coordinate with the action of Too Many Mouths.
复制标题
DOI：
10.1111/jipb.12285
复制
发表时间：
2015-03
影响因子：
11.4
通讯作者：
Ming Wang;Kezhen Yang;J. Le
中科院分区：
文献类型：
--
作者：
Ming Wang;Kezhen Yang;J. Le
在拟南芥中，气孔发育在原胚细胞获得气孔谱系细胞命运后开始。气孔或其前体与邻近的表皮细胞通讯，以确保“一个细胞间隔”规则。 Too Many Mouths (TMM) 和 ERECTA 家族受体接收到的来自 EPF/EPFL 肽配体的信号应该是由 YODA MAPK 级联转导的。碱性螺旋-环-螺旋转录因子SPEECHLESS (SPCH)是气孔细胞命运决定和不对称进入分裂的另一个关键调节因子，SPCH活性受YODA MAPK级联调节。油菜素类固醇 (BR) 信号是植物中最明确的信号转导途径之一，有助于控制气孔产生。但据报道，BR 对气孔产生具有相反的器官特异性影响。在这里，我们确认下胚轴中的气孔产生是由 BR 水平控制的。 YODA 和 CYCD4 对于 BR 气孔促进功能不是必需的。此外，我们发现BR可以赋予tmm下胚轴聚集的气孔表型，表明BR对气孔产生的器官特异性作用可能与TMM器官特异性作用相协调。
In Arabidopsis, stomatal development initiates after protodermal cells acquire stomatal lineage cell fate. Stomata or their precursors communicate with their neighbor epidermal cells to ensure the "one cell spacing" rule. The signals from EPF/EPFL peptide ligands received by Too Many Mouths (TMM) and ERECTA-family receptors are supposed to be transduced by YODA MAPK cascade. A basic helix-loop-helix transcription factor SPEECHLESS (SPCH) is another key regulator of stomatal cell fate determination and asymmetric entry divisions, and SPCH activity is regulated by YODA MAPK cascade. Brassinosteroid (BR) signaling, one of the most well characterized signal transduction pathways in plants, contributes to the control of stomatal production. But opposite organ-specific effects of BR on stomatal production were reported. Here we confirm that stomatal production in hypocotyls is controlled by BR levels. YODA and CYCD4 are not essential for BR stomata-promoting function. Furthermore, we found that BR could confer tmm hypocotyls clustered stomatal phenotype, indicating that the BR organ-specific effects on stomatal production might coordinate with the TMM organ-specific actions.