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An Arabidopsis mutant cex1 exhibits constant accumulation of jasmonate‐regulated AtVSP , Thi2.1 and PDF1.2
Author(s) -
Xu Linghui,
Liu Fuquan,
Wang Zhilong,
Peng Wen,
Huang Rongfeng,
Huang Dafang,
Xie Daoxin
Publication year - 2001
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(01)02331-6
Subject(s) - arabidopsis , mutant , regulator , arabidopsis thaliana , biology , jasmonate , microbiology and biotechnology , methyl jasmonate , botany , gene , biochemistry
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.