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Molecules and Cells

, Volume 29, Issue 6, pp 559–566 | Cite as

AtNEK6 interacts with ARIA and is involved in ABA response during seed germination

  • Sun-ji Lee
  • Dong-Im Cho
  • Jung-youn Kang
  • Myung-Duck Kim
  • Soo Young Kim
Article

Abstract

ARIA is an ARM repeat protein that is a positive regulator of ABA response. To identify ARIA-interacting proteins, we conducted yeast two-hybrid screening. One of the positive clones obtained from the screen encoded a protein kinase, AtNEK6, which belongs to the NIMA (Never In Mitosis, gene A)-related kinase family. We analyzed AtNEK6 over-expression (OX) and knockout (KO) lines to investigate its in vivo function. The AtNEK6 OX lines grew slowly, whereas the KO line germinated and grew faster than wild type plants. AtNEK6 also affected ABA and stress responses. During seed germination, AtNEK6 OX lines were hypersensitive to ABA and high osmolarity, whereas its KO line was partially insensitive to ABA and high osmolarity. Previously, AtNEK6 was shown to be involved in epidermal cell morphogenesis. Our results indicate that AtNEK6 is also involved in plant growth regulation and responses to ABA and high osmolarity during the seed germination stage.

Keywords

abiotic stress abscisic acid (ABA) Arabidopsis protein kinase two-hybrid screen 

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Copyright information

© The Korean Society for Molecular and Cellular Biology and Springer Netherlands 2010

Authors and Affiliations

  • Sun-ji Lee
    • 1
  • Dong-Im Cho
    • 1
  • Jung-youn Kang
    • 1
  • Myung-Duck Kim
    • 1
  • Soo Young Kim
    • 1
  1. 1.Department of Molecular Biotechnology and Kumho Life Science Laboratory, College of Agriculture and Life SciencesChonnam National UniversityGwangjuKorea

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