Involved in long chain fatty-acid beta-oxidation prior to gluconeogenesis during germination and subsequent seedling growth. Confers sensitivity to 2,4-dichlorophenoxybutiric acid (2,4-DB). Required for local and systemic induction of jasmonic acid (JA) biosynthesis after wounding. Seems to be involved in JA biosynthesis during senescence. acetyl-CoA + an acyl-CoA = a 3-oxoacyl-CoA + CoA Lipid metabolism; fatty acid metabolism. Homodimer. Peroxisomal targeting signal type 2 (PTS2-type) import is temperature and ATP-dependent, induced by zinc ions and PTS1-type import, but repressed by mature forms of PED1. Accumulates in etiolated cotyledons and in seedlings, also present in roots, flowers and siliques (at protein level). High levels in wounded leaves. Levels increase strongly upon imbibition and decrease 3 days later. Strongly induced in leaves during senescence. Expressed in the dark, repressed by light (at protein level). Induced by dehydration, by abscisic acid (ABA) and by wounding, both locally and systemically. Belongs to the thiolase-like superfamily. Thiolase family.