Plant Molecular Biology

, Volume 64, Issue 6, pp 633–644

Arabidopsis EIN2 modulates stress response through abscisic acid response pathway

Authors

  • Youning Wang
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Chuang Liu
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Kexue Li
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Feifei Sun
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Haizhou Hu
    • College of AgronomyShandong Agricultural University
  • Xia Li
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Yankun Zhao
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Chunyu Han
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Wensheng Zhang
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Yunfeng Duan
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
  • Mengyu Liu
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
    • The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental BiologyChinese Academy of Science
Article

DOI: 10.1007/s11103-007-9182-7

Cite this article as:
Wang, Y., Liu, C., Li, K. et al. Plant Mol Biol (2007) 64: 633. doi:10.1007/s11103-007-9182-7

Abstract

The nuclear protein ETHYLENE INSENSITIVE2 (EIN2) is a central component of the ethylene signal transduction pathway in plants, and plays an important role in mediating cross-links between several hormone response pathways, including abscisic acid (ABA). ABA mediates stress responses in plants, but there is no report on the role of EIN2 on plant response to salt and osmotic stresses. Here, we show that EIN2 gene regulates plant response to osmotic and salt stress through an ABA-dependent pathway in Arabidopsis. The expression of the EIN2 gene is down-regulated by salt and osmotic stress. An Arabidopsis EIN2 null mutant was supersensitive to both salt and osmotic stress conditions. Disruption of EIN2 specifically altered the expression pattern of stress marker gene RD29B in response to the stresses, but not the stress- or ABA-responsive genes RD29A and RD22, suggesting EIN2 modulates plant stress responses through the RD29B branch of the ABA response. Furthermore, disruption of EIN2 caused substantial increase in ABA. Lastly, our data showed that mutations of other key genes in ethylene pathway also had altered sensitivity to abiotic stresses, indicating that the intact ethylene may involve in the stress response. Taken together, the results identified EIN2 as a cross-link node in ethylene, ABA and stress signaling pathways, and EIN2 is necessary to induce developmental arrest during seed germination, and seedling establishment, as well as subsequent vegetative growth, thereby allowing the survival and growth of plants under the adverse environmental conditions.

Keywords

Stress signaling pathwayEthylene Insensitive 2EthyleneAbscisic acid ABAGene expressionArabidopsis thaliana

Abbreviations

ABA

Abscisic acid

ETR1

Ethylene Responsive 1

CTR1

Constitutive Triple Response 1

EIN2

Ethylene Insensitive 2

EIN2

Ethylene Insensitive 3

NCED3

9-cis-epoxycarotenoid dioxygenase3

RD29A

Desiccation responsive genes

RD29B/ RD22

ABA responsive genes

ABI3

ABA insensitive 3

ABI5

ABA insensitive 5

ABI8

ABA insensitive 8

ZEP/ABA1

Zeaxanthin epoxidase

Copyright information

© Springer Science+Business Media B.V. 2007