Molecular Breeding

, 37:57

Enhancement of abiotic stress tolerance in poplar by overexpression of key Arabidopsis stress response genes, AtSRK2C and AtGolS2

  • Xiang Yu
  • Misato Ohtani
  • Miyako Kusano
  • Nobuyuki Nishikubo
  • Misa Uenoyama
  • Taishi Umezawa
  • Kazuki Saito
  • Kazuo Shinozaki
  • Taku Demura
Article

DOI: 10.1007/s11032-016-0618-0

Cite this article as:
Yu, X., Ohtani, M., Kusano, M. et al. Mol Breeding (2017) 37: 57. doi:10.1007/s11032-016-0618-0

Abstract

Recent environmental issues have increased the demand for woody biomass as a renewable resource for industry and energy. For a stable supply of woody biomass, it is critical to decrease the effects of abiotic stresses, such as drought and salinity, which hinder plant growth. For the goal to develop practical stress-tolerant trees, we generated transgenic poplar plants (P. tremula × tremuloides), in which a key Arabidopsis regulatory factor involved in stress responses, SNF1-related protein kinase 2C (AtSRK2C), or galactinol synthase 2 (AtGolS2), was overexpressed. Both types of transgenic poplar plants displayed higher tolerance to abiotic stresses, in comparison with nontransgenic plants, indicating that AtSRK2C and AtGolS2 can function in the abiotic stress response pathway of poplar. We also examined the expression profiles of ten poplar genes putatively homologous to well-known Arabidopsis stress response genes and found that several of the poplar genes showed different responses to abiotic stress from their Arabidopsis counterparts. Whereas the overexpression of AtSRK2C in transgenic Arabidopsis plants was reported to upregulate the expression of endogenous genes, the overexpression of AtSRK2C or AtGolS2 in transgenic poplar did not. Taken together, our findings suggest that the details of the underlying molecular mechanisms of the abiotic stress response may differ, but that the key regulatory factors in Arabidopsis and poplar have common features and are effective molecular targets for further breeding to enhance abiotic stress tolerance in poplar.

Keywords

Abiotic stress tolerance Transgenic poplar AtSRK2C AtGolS2 Raffinose family oligosaccharide 

Abbreviations

ABA

Abscisic acid

DREB

Dehydration-responsive element binding

GC-MS

Gas chromatography-mass spectrophotometry

GolS

Galactinol synthase 2

LEA

Late embryogenesis abundant

RFO

Raffinose family oligosaccharide

RT-PCR

Reverse transcription polymerase chain reaction

SRK2C

SNF1-related protein kinase 2C

Supplementary material

11032_2016_618_MOESM1_ESM.pdf (345 kb)
ESM 1(PDF 345 kb)

Funding information

Funder NameGrant NumberFunding Note
Ministry of Education, Culture, Sports, Science, and Technology (JP) NC-CARP
    RIKEN
      Japan Society for the Promotion of Science
      • 22370020
      • 24114002
      • 25291062

      Copyright information

      © Springer Science+Business Media Dordrecht 2017

      Authors and Affiliations

      • Xiang Yu
        • 1
      • Misato Ohtani
        • 1
        • 2
      • Miyako Kusano
        • 1
      • Nobuyuki Nishikubo
        • 3
        • 4
      • Misa Uenoyama
        • 2
      • Taishi Umezawa
        • 3
        • 5
      • Kazuki Saito
        • 1
      • Kazuo Shinozaki
        • 1
      • Taku Demura
        • 1
        • 2
      1. 1.RIKEN Center for Sustainable Resource ScienceYokohamaJapan
      2. 2.Graduate School of Biological SciencesNara Institute of Science and TechnologyNaraJapan
      3. 3.RIKEN Plant Science CenterYokohamaJapan
      4. 4.Forest Technology LaboratoriesOji Holdings CorporationTokyoJapan
      5. 5.Tokyo University of Agriculture and TechnologyTokyoJapan

      Personalised recommendations