title: A genome-wide survey of homeodomain-leucine zipper genes and analysis of cold-responsive HD-Zip I members' expression in tomato.
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.
authors.affiliation: a College of Life Science , Northeast Agricultural University , Harbin , P.R. China.
authors.forename: Zhenzhu
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xiuling
authors.initials: X
authors.lastname: Chen
authors.forename: Xin
authors.initials: X
authors.lastname: Guan
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Hongyu
authors.initials: H
authors.lastname: Chen
authors.forename: Tingting
authors.initials: T
authors.lastname: Wang
authors.forename: Liana Dalcantara Ongouya
authors.initials: LD
authors.lastname: Mouekouba
authors.forename: Jingfu
authors.initials: J
authors.lastname: Li
authors.forename: Aoxue
authors.initials: A
authors.lastname: Wang
mesh_terms: D000595:Amino Acid Sequence; D032461:Chromosomes, Plant / Q000235:genetics; D003080:Cold Temperature; D020440:Gene Duplication; D018506:Gene Expression Regulation, Plant; D023281:Genomics; D018398:Homeodomain Proteins / Q000737:chemistry / Q000235:genetics*; D016350:Leucine Zippers; D018551:Solanum lycopersicum / Q000235:genetics* / Q000254:growth & development / Q000502:physiology; D008969:Molecular Sequence Data; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics; D013312:Stress, Physiological / Q000235:genetics
chemical_list: D018398:Homeodomain Proteins; D010940:Plant Proteins
keywords: HD-Zip; duplication; gene expression; phylogenetic analysis; tomato