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the plant journal:番茄WOX1影响小叶起始和叶片扩展

已有 1372 次阅读 2021-3-10 08:45 |个人分类:每日摘要|系统分类:论文交流

Leaflet initiation and blade expansion are separable in compound leaf development

第一作者Fei Du

第一单位中科院遗传与发育生物学研究所

通讯作者Yuling Jiao


 Abstract 


背景回顾Compound leaves are composed of multiple separate blade units termed leaflets. In tomato (Solanum lycopersicum) compound leaves, auxin promotes both leaflet initiation and blade expansion


提出问题:However, it is unclear how these two developmental processes interact.


研究对象:With highly variable complexity, tomatocompound leaves provide an ideal system to address this question. 


主要研究:In this study, we obtained and analyzed mutants of the WUSCHEL‐RELATED HOMEOBOX (WOX) family gene SlLAM1 from tomato, whose orthologs in tobacco (Nicotiana sylvestris) and other species are indispensable for blade expansion. 


结果1-叶片扩展:We show that SlLAM1 is expressed in the middle and marginal domains of leaves, and is required for blade expansion in leaflets. 


结果2-小叶起始:We demonstrate that sllam1 mutants cause a delay of leaflet initiation and slightly alter the arrangement of first‐order leaflets, whereas the overall leaflet number is comparable to that of wild‐ ype leaves. 


结果3-复叶形态发生:Analysis of the genetic interactions between SlLAM1 and key auxin signaling components revealed an epistatic effect of SlLAM1in determining the final leaf form


结果4-SlLAM1的其他功能:Finally, we show that SlLAM1 is also required for floral organ growth and affects the fertility of gametophytes. 


结论:Our data suggest that SlLAM1 promotes blade expansion in multiple leaf types, and leaflet initiation can be largely uncoupled from blade expansion during compound leaf morphogenesis.


 摘 要 


复叶(compound leaf)是由多个分隔开的叶片(blade)单位,即小叶(leaflet)组成。在番茄的复叶中,生长素促进小叶的起始和叶片的扩展。但是,这两个发育进程是如何互作的还不清楚。番茄的复叶具有高度变异的复杂性,为解决这一问题提供了一个理想的系统。本文中,作者获得并分析了番茄WOX基因家族WOX1SlLAM1)的突变体,烟草和其他物种中的WOX1基因作用于叶片的扩展。作者发现番茄SlLAM1基因在叶片的中央和边缘区域表达,作用于小叶的叶片扩展。作者发现sllam1突变体造成小叶起始延迟,轻微影响了第一轮小叶的排列,而总的小叶数目与野生型相当。通过对SlLAM1和关键生长素信号组分之间的遗传互作分析,作者发现SlLAM1在决定最终小叶形式上存在上位效应。最终,作者发现SlLAM1同样作用于花器官的生长,并影响配子体的育性。本文的研究揭示了SlLAM1基因在多种类型的叶片中均能够促进叶片扩展,而且在复叶的形态发生过程中,小叶的起始和叶片的扩展能够在很大程度上区分开。


 通讯作者 

** 焦雨铃 **


个人简介:

2001年,北京大学,学士;

2003年,耶鲁大学,硕士;

2006年,耶鲁大学,博士;

2006-2010年,加州理工学院,博后。


研究方向叶片扁平化的建立机制;干细胞团的重建。


doi: https://doi.org/10.1111/tpj.14982


Journal: the plant journal

Published online: Sep 05, 2020



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