An Arabidopsis mutant cex1 exhibits constant accumulation of jasmonate-regulated AtVSP, Thi2.1 and PDF1.2.
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.
Xu
L
L
Institute of Biotechnology Research, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
Liu
F
F
Wang
Z
Z
Peng
W
W
Huang
R
R
Huang
D
D
Xie
D
D
D000251:Adenosine Triphosphatases; D023181:Antimicrobial Cationic Peptides; D017360:Arabidopsis / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development; D029681:Arabidopsis Proteins; D018797:Cell Cycle Proteins / Q000235:genetics*; D003433:Crosses, Genetic; D003517:Cyclopentanes / Q000494:pharmacology*; D003624:Darkness; D023082:Defensins; D005020:Ethyl Methanesulfonate / Q000494:pharmacology; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D017343:Genes, Plant / Q000235:genetics; D017930:Genes, Reporter; D009154:Mutation / Q000187:drug effects / Q000235:genetics*; D054883:Oxylipins; D010641:Phenotype; D010940:Plant Proteins / Q000235:genetics* / Q000502:physiology; D018749:RNA, Plant / Q000032:analysis / Q000235:genetics; D015398:Signal Transduction / Q000187:drug effects; D015533:Transcriptional Activation / Q000187:drug effects; D000074405:Valosin Containing Protein
D023181:Antimicrobial Cationic Peptides; D029681:Arabidopsis Proteins; D018797:Cell Cycle Proteins; D003517:Cyclopentanes; D023082:Defensins; D054883:Oxylipins; D010940:Plant Proteins; D018749:RNA, Plant; C097482:THI2.1 protein, Arabidopsis; C011006:jasmonic acid; D005020:Ethyl Methanesulfonate; D000251:Adenosine Triphosphatases; D000074405:Valosin Containing Protein