A genome-wide survey of homeodomain-leucine zipper genes and analysis of cold-responsive HD-Zip I members’ expression in tomato

Zhenzhu Zhang(Qiqihar University), Xiuling Chen(Northeast Agricultural University), Xin Guan(Northeast Agricultural University), Yang Liu(Northeast Agricultural University), Hongyu Chen(Northeast Agricultural University), Tingting Wang(Northeast Agricultural University), Liana Dalcantara Ongouya Mouekouba(Harbin Institute of Technology), Jingfu Li(Northeast Agricultural University), Aoxue Wang(Northeast Agricultural University)
Bioscience Biotechnology and Biochemistry
June 18, 2014
10.1080/09168451.2014.923292
Cited by 79Open Access
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Abstract

Homeodomain-leucine zipper (HD-Zip) proteins are a kind of transcriptional factors that play a vital role in plant growth and development. However, no detailed information of HD-Zip family in tomato has been reported till now. In this study, 51 HD-Zip genes (SlHZ01-51) in this family were identified and categorized into 4 classes by exon-intron and protein structure in tomato (Solanum lycopersicum) genome. The synthetical phylogenetic tree of tomato, Arabidopsis and rice HD-Zip genes were established for an insight into their evolutionary relationships and putative functions. The results showed that the contribution of segmental duplication was larger than that of tandem duplication for expansion and evolution of genes in this family of tomato. The expression profile results under abiotic stress suggested that all SlHZ I genes were responsive to cold stress. This study will provide a clue for the further investigation of functional identification and the role of tomato HD-Zip I subfamily in plant cold stress responses and developmental events.

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