An Arabidopsis mutant cex1 exhibits constant accumulation of jasmonate-regulated AtVSP, Thi2.1 and PDF1.2

FEBS Lett. 2001 Apr 13;494(3):161-4. doi: 10.1016/s0014-5793(01)02331-6.

Abstract

Jasmonates (JA) act as a regulator in plant growth as well as a signal in plant defense. The Arabidopsis vegetative storage protein (AtVSP) and plant defense-related proteins thionin (Thi2.1) and defensin (PDF1.2) have previously been shown to accumulate in response to JA induction. In this report, we isolated and characterized a novel recessive mutant, cex1, conferring constitutive JA-responsive phenotypes including JA-inhibitory growth and constitutive expression of JA-regulated AtVSP, Thi2.1 and PDF1.2. The plant morphology and the gene expression pattern of the cex1 mutant could be phenocopied by treatment of wild-type plants with exogenous JA, indicating that CEX1 might be a negative regulator of the JA response pathway.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine Triphosphatases
  • Antimicrobial Cationic Peptides
  • Arabidopsis / drug effects
  • Arabidopsis / genetics*
  • Arabidopsis / growth & development
  • Arabidopsis Proteins*
  • Cell Cycle Proteins / genetics*
  • Crosses, Genetic
  • Cyclopentanes / pharmacology*
  • Darkness
  • Defensins*
  • Ethyl Methanesulfonate / pharmacology
  • Gene Expression Regulation, Plant / drug effects
  • Genes, Plant / genetics
  • Genes, Reporter
  • Mutation / drug effects
  • Mutation / genetics*
  • Oxylipins
  • Phenotype
  • Plant Proteins / genetics*
  • Plant Proteins / physiology
  • RNA, Plant / analysis
  • RNA, Plant / genetics
  • Signal Transduction / drug effects
  • Transcriptional Activation / drug effects
  • Valosin Containing Protein

Substances

  • Antimicrobial Cationic Peptides
  • Arabidopsis Proteins
  • Cell Cycle Proteins
  • Cyclopentanes
  • Defensins
  • Oxylipins
  • Plant Proteins
  • RNA, Plant
  • THI2.1 protein, Arabidopsis
  • jasmonic acid
  • Ethyl Methanesulfonate
  • Adenosine Triphosphatases
  • Valosin Containing Protein