Hu Qianqian, Zeng Mengting, Wang Miao, Huang Xiaoyu, Li Jiayi, Feng Changhui, Xuan Lijie, Liu Lu, Huang Gengqing
Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China.
Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
Front Plant Sci. 2021 Oct 25;12:767667. doi: 10.3389/fpls.2021.767667. eCollection 2021.
Multiple C2 domain and transmembrane region proteins (MCTPs) are a group of evolutionarily conserved proteins and show emerging roles in mediating protein trafficking and signaling transduction. Although, several studies showed that MCTPs play important roles during plant growth and development, their biological functions in cotton remain largely unknown. Here, we identify and characterize 33 genes from upland cotton () and reveal the diverse expression patterns of in various tissues. We also find that , , and are highly expressed in the main stem apex, suggesting their possible roles in shoot development. Through analyzing different cotton species, we discover plant heights are closely related to the expression levels of , , and . Furthermore, we silence the expression of genes using virus-induced gene silencing (VIGS) system in cotton and find that , , and play an essential role in shoot meristem development. GhMCTPs interact with GhKNAT1 and GhKNAT2 and regulate meristem development through integrating multiple signal pathways. Taken together, our results demonstrate functional redundancy of GhMCTPs in cotton shoot meristem development and provide a valuable resource to further study various functions of GhMCTPs in plant growth and development.
多C2结构域和跨膜区域蛋白(MCTPs)是一组进化上保守的蛋白,在介导蛋白质运输和信号转导中发挥着新出现的作用。尽管多项研究表明MCTPs在植物生长发育过程中起重要作用,但其在棉花中的生物学功能仍 largely未知。在此,我们从陆地棉中鉴定并表征了33个基因,并揭示了它们在不同组织中的多种表达模式。我们还发现, 、 和 在主茎顶端高度表达,表明它们在茎发育中可能发挥的作用。通过分析不同棉花品种,我们发现株高与 、 和 的表达水平密切相关。此外,我们利用病毒诱导基因沉默(VIGS)系统在棉花中沉默这些基因的表达,发现 、 和 在茎分生组织发育中起重要作用。GhMCTPs与GhKNAT1和GhKNAT2相互作用,并通过整合多种信号通路调节分生组织发育。综上所述,我们的结果证明了GhMCTPs在棉花茎分生组织发育中的功能冗余,并为进一步研究GhMCTPs在植物生长发育中的各种功能提供了宝贵资源。