Plant lipoxygenase may be involved in a number of diverse aspects of plant physiology including growth and development, pest resistance, and senescence or responses to wounding. This lipoxygenase introduces molecular oxygen exclusively into the C-9 position of linoleic and linolenic. (9Z,12Z)-octadecadienoate + O2 = (9S)-hydroperoxy-(10E,12Z)-octadecadienoate Binds 1 Fe cation per subunit. Iron is tightly bound. Lipid metabolism; oxylipin biosynthesis. Monomer. Expressed in the embryo 1 day after inbibition, and at low levels in developing seeds between 3 and 20 days after flowering. Belongs to the lipoxygenase family.