LOX — Lactuca sativa

Summary

LsLOX, encoded by the garden lettuce gene LSAT_V11C100015820 on chromosome 1, is a lipoxygenase enzyme with linoleate 9S- and 13S-lipoxygenase activities, as well as phytoene dehydrogenase, peroxidase, and salicylic acid-binding activities. It is associated with oxylipin and jasmonic acid biosynthesis, green leaf volatile production, and responses to herbivores, insects, ozone, and high light intensity. The gene has been linked to photoperiod-sensitive flowering time, seed yield, photosynthetic rate, nitrate content and transport, root thickness, and low temperature stress response. Localisation evidence connects the product to chloroplast thylakoids, the chloroplast envelope, stromules, stress granules, and the apoplast. Studies of related genes in other species link the family to leaf volume, harvest index, seed weight, and resistance to thrips, aphids, and fungal pathogens.