Jasmonates - Hormone Synthetic Pathways and Genes in Arabidopsis

Jasmonates (JAs)

Jasmonates (jasmonic acid and related compounds) have been the only plant hormone class that is biosynthesized from fatty acid. They were initially isolated as inhibitors of growth. Later, they have been shown to regulate various physiological processes, including development of flowers and defense responses against herbivores and fungal pathogens. Recent studies on jasmonate receptors have shown that some amino acid conjugates of jasmonic acid (mainly jasmonoyl-isoleucine in Arabidopsis) are the bioactive form of this hormone class. The biosynthesis pathway is shown here.

Genes on the pathway

Gene name Locus name Description
DAD1 At2g44810 galactolipase/phospholipase A1
DGL At1g05800 galactolipase
LOX2 At3g45140 13-lipoxygenase
AOS At5g42650 allene oxide synthase (CYP74A1)
AOC1 AT3G25760 allene oxide cyclase
AOC2 AT3G25770 allene oxide cyclase
AOC3 AT3G25780 allene oxide cyclase
OPR3 At2g06050 OPDA reductase
OPCL1 At1g20510 OPC-8:0-CoA ligase
ACX1 AT4G16760 acyl-CoA oxidase
ACX2 AT5G65110 acyl-CoA oxidase
ACX3 AT1G06290 acyl-CoA oxidase
ACX4 AT3G51840 acyl-CoA oxidase
ACX5 AT2G35690 acyl-CoA oxidase
JAR1 AT2G46370 jasmonic acid-amino acid synthase
JMT At1g19640 jasmonic acid carboxyl methyltransferase
AtST2a AT5G07010 hydroxyjasmonic acid sulfotransferase
RIKEN Plant Hormone Research Network - RIKEN Center for Sustainable Resource Science