Strictly inducible cytochrome P450 involved in the biosynthesis of the anti-fungal toxins colneleic acid and colnelenic acid. Can use (9S,10E,12Z)-9-hydroperoxy-10,12-octadecadienoic acid (9-HPOD) and (10E,12Z,15Z)-(9S)-9-hydroperoxyoctadeca-10,12,15-trienoic acid (9-HPOT) as substrates but has a very low activity with the corresponding 13-hydroperoxides. (9S)-hydroperoxy-(10E,12Z)-octadecadienoate = colneleate + H2O Not detected in leaves, stems or roots of healthy plants. Up-regulated 2 hours after addition of elicitor, with a peak after 4 hours. In roots inoculated with zoospores of P.parasitica (Ppm race 0), detected 1 day-post-inoculation. Up-regulated by ethylene and methyl jasmonate. Not induced systemically. Not induced by salicylic acid or by wounding. Belongs to the cytochrome P450 family. 9-divinyl ether synthase subfamily.