Plant non-specific lipid-transfer proteins transfer phospholipids as well as galactolipids across membranes. May play a role in wax or cutin deposition in the cell walls of expanding epidermal cells and certain secretory tissues. Causes an allergic reaction in human. Binds to IgE and induces histamine release from basophils of Pj-pollen-allergic subjects. Belongs to the plant LTP family.