Jasmonic acid interacts with abscisic acid to regulate plant responses to water stress conditions.
Phytohormones are key players in signaling environmental stress conditions. Hormone profiling together with proline accumulation were studied in leaves and roots of different mutant lines of Arabidopsis. Regulation of proline accumulation in this system seems complex and JA-deficient (jar1-1) and JA-insensitive (jai1) lines accumulating high levels of proline despite their very low ABA levels seems to discard an ABA-dependent response. However, the pattern of proline accumulation in jai1 seedlings parallels that of ABA. Under stress conditions, there is an opposite pattern of ABA accumulation in roots of jar1-1/coi1-16 (in which ABA only slightly increase) and jai1 (in which ABA increase is even higher than in WT plants). This also makes JA-ABA crosstalk complex and discards any lineal pathway that could explain this hormonal interaction.
a Departamento de Ciencias Agrarias y del Medio Natural ; Universitat Jaume I ; Castelló de la Plana, Spain.
Carlos
C
de Ollas
a Departamento de Ciencias Agrarias y del Medio Natural ; Universitat Jaume I ; Castelló de la Plana, Spain.
Vicent
V
Arbona
a Departamento de Ciencias Agrarias y del Medio Natural ; Universitat Jaume I ; Castelló de la Plana, Spain.
Aurelio
A
Gómez-Cadenas
D000040:Abscisic Acid / Q000378:metabolism*; D017360:Arabidopsis / Q000378:metabolism*; D003517:Cyclopentanes / Q000378:metabolism*; D003681:Dehydration; D003890:Desiccation; D007532:Isoleucine / Q000031:analogs & derivatives / Q000378:metabolism; D054883:Oxylipins / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D011392:Proline / Q000378:metabolism
D003517:Cyclopentanes; D054883:Oxylipins; C532883:jasmonoyl-isoleucine; D007532:Isoleucine; C011006:jasmonic acid; D000040:Abscisic Acid; D011392:Proline
ABA; JA-Ile; coi1-16; drought; hormone signal transduction; jar1-1; proline