13S-lipoxygenase that can use linolenic acid as substrates. Plant lipoxygenases may be involved in a number of diverse aspects of plant physiology including growth and development, pest resistance, and senescence or responses to wounding. Catalyzes the hydroperoxidation of lipids containing a cis,cis-1,4-pentadiene structure (By similarity). (9Z,12Z)-octadecadienoate + O2 = (13S)-hydroperoxy-(9Z,11E)-octadecadienoate (9Z,12Z,15Z)-octadecatrienoate + O2 = (13S)-hydroperoxy-(9Z,11E,15Z)-octadecatrienoate Binds 1 Fe cation per subunit. Lipid metabolism; oxylipin biosynthesis. Expressed in roots and leaves. First observed in lateral root primordia (LRP), from the first pericycle divisions. Later expressed in lateral roots. Expression is greatly increased in leaves during leaf senescence. Induced by methyl jasmonate (MeJA), bacterial pathogens (e.g. Pseudomonas syringae pv. tomato), high light and wounding. Belongs to the lipoxygenase family.