Plant Molecular Biology Reporter

, Volume 30, Issue 4, pp 848–859

Genome-wide Identification and Characterization of a Dehydrin Gene Family in Poplar (Populus trichocarpa)

  • Chang-Cai Liu
  • Chun-Ming Li
  • Bao-Guang Liu
  • Su-Jie Ge
  • Xiu-Mei Dong
  • Wei Li
  • Hang-Yong Zhu
  • Bai-Chen Wang
  • Chuan-Ping Yang
Original Paper

DOI: 10.1007/s11105-011-0395-1

Cite this article as:
Liu, C., Li, C., Liu, B. et al. Plant Mol Biol Rep (2012) 30: 848. doi:10.1007/s11105-011-0395-1

Abstract

Dehydrins (DHNs) define a complex group of stress inducible proteins characterized by the presence of one or more lysine-rich motifs. DHNs are present in multiple copies in the genome of plant species. Although genome-wide analysis of DHNs composition and chromosomal distribution has been conducted in herbaceous species, it remains unexplored in woody plants. Here, we report on the identification of ten genes encoding eleven putative DHN polypeptides in Populus. We document that DHN genes occur as duplicated blocks distributed over seven of the 19 poplar chromosomes likely as a result of segmental and tandem duplication events. Based on conserved motifs, poplar DHNs were assigned to four subgroups with the Kn subgroup being the most frequent. One putative DHN polypeptide (PtrDHN-10) with a SKS arrangement could originate from a recombination between SKn and KnS genes. In silico analysis of microarray data showed that in unstressed poplar, DHN genes are expressed in all vegetative tissues except for mature leaves. This exhaustive survey of DHN genes in poplar provides important information that will assist future studies on their functional role in poplar.

Keywords

PopulusLEADehydrinsCold stressWoody plantsCellular dehydration

Abbreviations

LEA

Late embryogenesis abundant

DHN

Dehydrin

LGs

Linkage groups

Supplementary material

11105_2011_395_MOESM1_ESM.doc (5.3 mb)
ESM 1(DOC 5446 kb)

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Chang-Cai Liu
    • 1
    • 2
  • Chun-Ming Li
    • 3
  • Bao-Guang Liu
    • 4
  • Su-Jie Ge
    • 1
  • Xiu-Mei Dong
    • 1
  • Wei Li
    • 5
  • Hang-Yong Zhu
    • 1
    • 6
  • Bai-Chen Wang
    • 1
  • Chuan-Ping Yang
    • 1
  1. 1.State Key Laboratory of Tree Genetics and BreedingNortheast Forestry UniversityHarbinPeople’s Republic of China
  2. 2.Laboratory for Chemical Defense and Microscale AnalysisZhijiangPeople’s Republic of China
  3. 3.Forestry Research Institution of Heilongjiang ProvinceHarbinPeople’s Republic of China
  4. 4.Forestry CollegeBeihua UniversityJilinPeople’s Republic of China
  5. 5.School of ForestryNortheast Forestry UniversityHarbinPeople’s Republic of China
  6. 6.Bureau of Garden and ParkQitaihePeople’s Republic of China