An Evolutionarily Conserved Receptor-like Kinases Signaling Module Controls Cell Wall Integrity During Tip Growth

First author: Jens Westermann; Affiliations: University of Cologne (科隆大学): Cologne, Germany

Corresponding author: Aurélien Boisson-Dernier

Rooting cells and pollen tubes—key adaptative innovations that evolved during the colonization and subsequent radiation of plants on land—expand by tip growth. Tip growth relies on a tight coordination between the protoplast growth and the synthesis/remodeling of the external cell wall. In root hairs and pollen tubes of the seed plant Arabidopsis thaliana, cell wall integrity (CWI) mechanisms monitor this coordination through the Malectin-like receptor kinases (MLRs), such as AtANXUR1 and AtFERONIA, that act upstream of the AtMARIS PTI1-like kinase. Here, we show that rhizoid growth in the early diverging plant, Marchantia polymorpha, is also controlled by an MLR and PTI1-like signaling module. Rhizoids, root hairs, and pollen tubes respond similarly to disruption of MLR and PTI1-like encoding genes. Thus, the MLR and PTI1-like signaling module that controls CWI during tip growth is conserved between M. polymorpha and A. thaliana, suggesting that it was active in the common ancestor of land plants.

生根细胞和花粉管是植物在陆地殖民并辐射期间演化出的关键适应性创新，随着顶端生长而扩张。顶端生长依赖于原生质体生长与外部细胞壁合成/重塑之间的紧密协调。在种子植物拟南芥的根毛和花粉管中，细胞壁完整性CWI机制通过AtANXUR1和AtFERONIA等作用于AtMARIS类PTI1激酶上游的类Malectin受体激酶MLRs来监控这种协调作用。 本文中，作者的研究显示了在早期分化的植物地钱（Marchantia polymorpha）的根状茎生长过程中也受到一个MLR和类PTI1信号模块的控制。根状茎、根毛和花粉管对于MLR和类PTI1编码基因扰乱的响应相似。因此，尖端生长过程中控制CWI的MLR和类PTI1信号模块在地钱和拟南芥中功能保守，表明它在陆地植物的共同祖先中就已经存在并发挥作用。

通讯：Aurélien Boisson-Dernier (https://www.ag-boisson-dernier.botanik.uni-koeln.de/1903.html)

个人简介：1999-2003年，法国图卢兹大学，博士；2003-2008年，美国加利福尼亚大学圣地亚哥分校；博士后；2008-2014年，瑞士苏黎世大学，博士后/讲师。

研究方向：固着植物在细胞生长、细胞间通讯以及环境感应时的信号通路。

doi: https://doi.org/10.1016/j.cub.2019.09.069

Journal: Current Biology

Published date: October 31, 2019