Arabidopsis YAK1 regulates abscisic acid response and drought resistance

Dongjin Kim*, Valentine Otang Ntui, Liming Xiong*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

19 Citations (Scopus)

Abstract

Abscisic acid (ABA) is an important phytohormone that controls several plant processes such as seed germination, seedling growth, and abiotic stress response. Here, we report that AtYak1 plays an important role in ABA signaling and postgermination growth in Arabidopsis. AtYak1 knockout mutant plants were hyposensitive to ABA inhibition of seed germination, cotyledon greening, seedling growth, and stomatal movement. atyak1-1 mutant plants display reduced drought stress resistance, as evidenced by water loss rate and survival rate. Molecular genetic analysis revealed that AtYak1 deficiency led to elevated expression of stomatal-related gene, MYB60, and down-regulation of several stress-responsive genes. Altogether, these results indicate that AtYak1 plays a role as a positive regulator in ABA-mediated drought response in Arabidopsis.

Original languageEnglish
Pages (from-to)2201-2209
Number of pages9
JournalFEBS Letters
Volume590
Issue number14
DOIs
Publication statusPublished - 1 Jul 2016

Scopus Subject Areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

User-Defined Keywords

  • abiotic stress
  • abscisic acid
  • Arabidopsis Yak1

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