Ma Jun, Wang Qinglian, Sun Runrun, Xie Fuliang, Jones Don C, Zhang Baohong
Department of Biology, East Carolina University, Greenville, NC 27858, USA.
Henan Institute of Sciences and Technology, Xinxiang, Henan 453003, P. R. China.
Sci Rep. 2014 Oct 16;4:6645. doi: 10.1038/srep06645.
Plant-specific TEOSINTE-BRANCHED1/CYCLOIDEA/PCF (TCP) transcription factors play versatile functions in multiple aspects of plant growth and development. However, no systematical study has been performed in cotton. In this study, we performed for the first time the genome-wide identification and expression analysis of the TCP transcription factor family in Gossypium raimondii. A total of 38 non-redundant cotton TCP encoding genes were identified. The TCP transcription factors were divided into eleven subgroups based on phylogenetic analysis. Most TCP genes within the same subfamily demonstrated similar exon and intron organization and the motif structures were highly conserved among the subfamilies. Additionally, the chromosomal distribution pattern revealed that TCP genes were unevenly distributed across 11 out of the 13 chromosomes; segmental duplication is a predominant duplication event for TCP genes and the major contributor to the expansion of TCP gene family in G. raimondii. Moreover, the expression profiles of TCP genes shed light on their functional divergence.
植物特有的玉米分枝1/类周期蛋白/PCF（TCP）转录因子在植物生长发育的多个方面发挥着多种功能。然而，尚未在棉花中进行系统研究。在本研究中，我们首次对雷蒙德氏棉中的TCP转录因子家族进行了全基因组鉴定和表达分析。共鉴定出38个非冗余的棉花TCP编码基因。基于系统发育分析，TCP转录因子被分为11个亚组。同一亚科内的大多数TCP基因表现出相似的外显子和内含子结构，且基序结构在各亚科间高度保守。此外，染色体分布模式显示，TCP基因在13条染色体中的11条上分布不均；片段重复是TCP基因的主要重复事件，也是雷蒙德氏棉中TCP基因家族扩张的主要原因。此外，TCP基因的表达谱揭示了它们的功能差异。
