Loss of the R2R3 MYB, AtMyb73, causes hyper-induction of the SOS1 and SOS3 genes in response to high salinity in Arabidopsis

Jun Hyeok Kim, Nguyen Hoai Nguyen, Chan Young Jeong, Ngoc Trinh Nguyen, Suk Whan Hong, Hojoung Lee

Research output: Contribution to journalArticle

53 Citations (Scopus)


Environmental stressors, including high salt, drought, and low or high temperatures, are often associated with significant losses in agricultural productivity. Plants have evolved a diverse array of signaling pathways to modulate their development in response to various environmental challenges. Here, we report the characterization of a member of the R2R3-MYB transcription factor family, AtMyb73. The expression of AtMyb73 was up-regulated by salt stress but not by other stresses. The maximum level of AtMyb73 expression occurred at 6. h of 300. mM NaCl treatment. Under salt stress, atmyb73 ko mutant plants exhibited higher survival rates compare to wild type (Col-0) plants. Using quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis, we determined that the accumulation of salt overly sensitive (SOS) transcripts, SOS1 and SOS3, was higher in atmyb73 ko and atmyb73 eko plants than in wild type plants in response to 300. mM NaCl treatment. These results indicate that AtMyb73 is a negative regulator of SOS induction in response to salt stress in Arabidopsis thaliana.

Original languageEnglish
Pages (from-to)1461-1465
Number of pages5
JournalJournal of Plant Physiology
Issue number16
Publication statusPublished - 2013 Nov 1



  • Abiotic stress
  • Arabidopsis thaliana
  • MYB transcription factor
  • Salt overly sensitive
  • Salt stress

ASJC Scopus subject areas

  • Plant Science
  • Physiology
  • Agronomy and Crop Science

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