OPDA-Ile - a new JA-Ile-independent signal?
Expression takes place for most of the jasmonic acid (JA)-induced genes in a COI1-dependent manner via perception of its conjugate JA-Ile in the SCFCOI1-JAZ co-receptor complex. There are, however, numerous genes and processes, which are preferentially induced COI1-independently by the precursor of JA, 12-oxo-phytodienoic acid (OPDA). After recent identification of the Ile-conjugate of OPDA, OPDA-Ile, biological activity of this compound could be unequivocally proven in terms of gene expression. Any interference of OPDA, JA, or JA-Ile in OPDA-Ile-induced gene expression could be excluded by using different genetic background. The data suggest individual signaling properties of OPDA-Ile. Future studies for analysis of an SCFCOI1-JAZ co-receptor-independent route of signaling are proposed.
a Department of Molecular Signal Processing , Leibniz Institute of Plant Biochemistry , Halle (Saale) , Germany.|b Laboratory of Growth Regulators, Center of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany AS CR & Palacký University , Olomouc , Czech Republic.
Claus
C
Wasternack
c Department of Cell and Metabolic Biology , Leibniz Institute of Plant Biochemistry , Halle (Saale) , Germany.
Bettina
B
Hause
D017360:Arabidopsis / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000378:metabolism; D003517:Cyclopentanes / Q000378:metabolism*; D005231:Fatty Acids, Unsaturated / Q000378:metabolism; D007532:Isoleucine / Q000031:analogs & derivatives* / Q000378:metabolism; D054883:Oxylipins / Q000378:metabolism; D010937:Plant Growth Regulators / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology
D029681:Arabidopsis Proteins; D003517:Cyclopentanes; D005231:Fatty Acids, Unsaturated; D054883:Oxylipins; D010937:Plant Growth Regulators; C532883:jasmonoyl-isoleucine; D007532:Isoleucine; C025999:12-oxophytodienoic acid; C011006:jasmonic acid
12-oxo-phytodienoic acid (OPDA); JA-Ile perception; OPDA-Ile-induced gene expression; SCFCOI1-JAZ coreceptor complex; jasmonic acid (JA); jasmonoyl-isoleucine (JA-Ile)