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Biologia Plantarum

, Volume 61, Issue 4, pp 693–701 | Cite as

Overexpression of ERF96, a small ethylene response factor gene, enhances salt tolerance in Arabidopsis

  • X. Wang
  • C. Hou
  • K. Zheng
  • Q. Li
  • S. Chen
  • S. WangEmail author
Original paper

Abstract

Salt stress is one of the abiotic stresses limiting the yield of crops worldwide. However, the molecular mechanisms underlying the regulation of plant response to salt stress are not completely elucidated. Ethylene response factors (ERFs) are a subfamily of the AP2 (APETALA2)/ERF transcription factor family that regulates multiple aspects of plant growth and development, and plant responses to biotic and abiotic stresses. ERF96 is one of the small ERFs that is involved in plant defense response and abscisic acid signaling in Arabidopsis. By using real time quantitative PCR, we found that the expression of ERF96 in the wild type Arabidopsis thaliana (cv. Col-0) seedlings was induced by NaCl treatment. The transgenic plants overexpressing ERF96 were more tolerant to salt stress in terms of NaCl inhibited seed germination, early seedling development, and fresh mass. Consistent with these observations, elevated expressions of some NaCl-responsive genes including responsive drought 29 (RD29A), Δ1-pyrroline-5-carboxylate synthetase (P5CS), cold responsive 15A (COR15A), and kinase 1 (KIN1) were observed in the transgenic plants in the presence of NaCl. We also found that the Na+ and K+ content and expressions of genes related to Na+/K+ homeostasis including stelar K+ outward rectifier (SKOR) and potassium transport 2/3 (AKT2/3) were altered in the ERF96 transgenic plants in response to NaCl treatment. Taken together, these results showed that overexpression of ERF96 enhanced plant tolerance to salt stress, indicating that ERF96 is a positive regulator of salt tolerance in Arabidopsis.

Additional key words

NaCl potassium sodium transcription factor transgenic plants 

Abbreviations

ABA

avscisic acid

AKT2/3

potassium transporter 2/3

AP2

APETALA2

AsA

ascorbic acid

COR15A

coldresponsive 15A

ERF

ethylene response factor

KIN1

kinase 1

MS

Murashige and Skoog

P5CS

Δ1-pyrroline-5-carboxylate synthetase

RAV

related to ABI3/VP1

RD29A

responsive drought 29A

SKOR

stelar K+ outward rectifier

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Supplementary material

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Copyright information

© The Institute of Experimental Botany 2017

Authors and Affiliations

  • X. Wang
    • 1
  • C. Hou
    • 1
  • K. Zheng
    • 1
  • Q. Li
    • 1
  • S. Chen
    • 1
  • S. Wang
    • 1
    Email author
  1. 1.Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & CytologyNortheast Normal UniversityChangchunP.R. China

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