Specifically cleaves olefinic bonds in cyclic enones (PubMed:11094980). Involved in the biosynthesis of jasmonic acid (JA) and perhaps in biosynthesis or metabolism of other oxylipin signaling moleclules (PubMed:29291349, PubMed:10872231, PubMed:10973494). Required for the spatial and temporal regulation of JA levels during dehiscence of anthers, promoting the stomium degeneration program (PubMed:10899973, PubMed:10973494). In vitro, reduces 9S,13S-12-oxophytodienoic acid (9S,13S-OPDA) and 9R,13R-OPDA to 9S,13S-OPC-8:0 and 9R,13R-OPC-8:0, respectively (PubMed:10872231). Can detoxify the explosive 2,4,6-trinitrotoluene (TNT) in vitro by catalyzing its nitroreduction to form hydroxylamino-dinitrotoluene (HADNT) (PubMed:19605548). NADP(+) + OPC-8 = (10Z,15Z)-12-oxophytodienoate + H(+) + NADPH Optimum pH is 7-8. Active from pH 5.0 to 8.5. Lipid metabolism; oxylipin biosynthesis. Expressed in green seedling, leaves, flowers (anthers, pistil, petal and stamen), and to a lower extent in roots and siliques. Specifically expressed in filament during anther dehiscence initiation. At the initiation time of the stomium degeneration program, expressed in all floral organs. Later, transcripts levels increase in pistil, petal, stamen filament, and in vascular region close to the stamen filament. When the anther dehiscence is initiated, levels of transcripts decrease, except within the vascular tissues. Induction mediated by wounding and methyl JA (MeJA) needs COI1. Also induced by BR (24-epibrassinolide), UV LIGHT, wind, touch, and the detergent Sapogenat T-110. Seems to not be influenced by salicylic acid, cold and heat treatments (PubMed:11094980, Ref.4). Induced by infection with the fungal pathogens Botritys cinerea and Alternaria brassicicola, insect feeding with Spodoptera littoralis, and wounding (PubMed:29291349). Male sterility (PubMed:10973494, PubMed:19765234, PubMed:29291349). Fertility can be restored by exogenous jasmonate but not by 12-oxophytodienoic acid (PubMed:10973494, PubMed:19765234, PubMed:29291349). Large petals with altered vein patterning (PubMed:19765234). Belongs to the NADH:flavin oxidoreductase/NADH oxidase family.