Molecular characterization and expression analysis of Triticum aestivum squamosa-promoter binding protein-box genes involved in ear development  

作　　者：Bin Zhang Xia Liu Guangyao Zhao Xinguo Mao Ang Li Ruilian Jing 

机构地区：[1]National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, the Chinese Academy of Agricultural Sciences [2]College of Bioengineering, Shanxi University

出　　处：《Journal of Integrative Plant Biology》2014年第6期571-581,共11页植物学报（英文版）

基　　金：supported by the National High-tech R&D Program (2011AA100501);the National Basic Research Program of China (2010CB951501)

摘　　要：Wheat （Triticum aestivum L.） is one of the most important crops in the world. Squamosa-promoter binding protein （SBP）-box genes play a critical role in regulating flower and fruit development. In this study, 10 novel SBP-box genes （TaSPL genes） were isolated from wheat （（Triticum aestivum L.） cultivar Yanzhan 4110）. Phylogenetic analysis classified the TaSPL genes into five groups （G1-G5）. The motif combinations and expression patterns of the TaSPL genes varied among the five groups with each having own distinctive characteristics： TaSPL20/21 in G1 and TaSPL17 in G2 mainly expressed in the shoot apical meristem and the young ear, and their expression levels responded to development of the ear; TaSPL6/15 belonging to G3 were upregulated and TaSPL1/23 in G4 were downregulated during grain development; the gene in G5 （TaSPL3） expressed constitutively. Thus, the consistency of the phylogenetic analysis, motif compositions, and expression patterns of the TaSPL genes revealed specific gene structures and functions. On the other hand, the diverse gene structures and different expression patterns suggested that wheat SBP-box genes have a wide range of functions. The results also suggest a potential role for wheat SBP-box genes in ear development. This study provides a significant beginning of functional analysis of SBP-box genes in wheat.Wheat （Triticum aestivum L.） is one of the most important crops in the world. Squamosa-promoter binding protein （SBP）-box genes play a critical role in regulating flower and fruit development. In this study, 10 novel SBP-box genes （TaSPL genes） were isolated from wheat （（Triticum aestivum L.） cultivar Yanzhan 4110）. Phylogenetic analysis classified the TaSPL genes into five groups （G1-G5）. The motif combinations and expression patterns of the TaSPL genes varied among the five groups with each having own distinctive characteristics： TaSPL20/21 in G1 and TaSPL17 in G2 mainly expressed in the shoot apical meristem and the young ear, and their expression levels responded to development of the ear; TaSPL6/15 belonging to G3 were upregulated and TaSPL1/23 in G4 were downregulated during grain development; the gene in G5 （TaSPL3） expressed constitutively. Thus, the consistency of the phylogenetic analysis, motif compositions, and expression patterns of the TaSPL genes revealed specific gene structures and functions. On the other hand, the diverse gene structures and different expression patterns suggested that wheat SBP-box genes have a wide range of functions. The results also suggest a potential role for wheat SBP-box genes in ear development. This study provides a significant beginning of functional analysis of SBP-box genes in wheat.

关 键 词：Expression profile grain yield squamosa-promoter binding protein-box genes Triticum aestivum 

分 类 号：Q943.2[生物学—植物学]