CIK Receptor Kinases Determine Cell Fate Specification during Early Anther Development in Arabidopsis. Issue 10 (10th September 2018)

• Record Type: Journal Article
• Authors: Cui, Yanwei; Hu, Chong; Zhu, Yafen; Cheng, Kaili; Li, Xiaonan; Wei, Zhuoyun; Xue, Li; Lin, Fang; Shi, Hongyong; Yi, Jing; Hou, Suiwen; He, Kai; Li, Jia; Gou, Xiaoping
• Is Part Of: The Plant Cell. Volume 30:Issue 10(2018)
• Page Start: 2383
• Page End: 2401
• Publication Date: 2018-09-10
• DOI: 10.1105/tpc.17.00586
• Languages: English
• ISSNs: 1040-4651

Abstract

Abstract : CLAVATA3 INSENSITIVE RECEPTOR KINASEs function with BARELY ANY MERISTEM 1/2 and RECEPTOR-LIKE PROTEIN KINASE2 to regulate early anther development in Arabidopsis. Abstract: Appropriate cell division and differentiation ensure normal anther development in angiosperms. BARELY ANY MERISTEM 1/2 (BAM1/2) and RECEPTOR-LIKE PROTEIN KINASE2 (RPK2), two groups of leucine-rich repeat receptor-like protein kinases, are required for early anther cell specification. However, little is known about the molecular mechanisms underlying these two RLK-mediated signaling pathways. Here, we show that CLAVATA3 INSENSITIVE RECEPTOR KINASEs (CIKs), a group of novel coreceptor protein kinase-controlling stem cell homeostasis, play essential roles in BAM1/2- and RPK2-regulated early anther development in Arabidopsis thaliana . The archesporial cells of cik1/2/3 triple and cik1/2/3/4 quadruple mutant anthers perform anticlinal division instead of periclinal division. Defective cell division and specification of the primary and inner secondary parietal cells occur in these mutant anthers. The disordered divisions and specifications of anther wall cells finally result in excess microsporocytes and a lack of one to three parietal cell layers in mutant anthers, resembling rpk2 or bam1/2 mutant anthers. Genetic and biochemical analyses indicate that CIKs function as coreceptors of BAM1/2 and RPK2 to regulate archesporial cell division and determine the specification of anther parietal cells.