Lipid transfer protein involved in seed and ovule maturation and development, probably by regulating the fatty acids homeostasis during suberin and sporopollenin biosynthesis or deposition (PubMed:24460633). Contributes to pre-invasive defense against some non-host powdery mildew pathogens by preventing the penetration of the epidermal cell wall by the fungal agents (e.g. Blumeria graminis f. sp. hordei (Bgh)) (PubMed:30102837). Preferentially expressed in the shoot apical meristem and the root meristem (PubMed:21558309). Also present in the ovules and developing embryos (PubMed:21558309). Observed in cotyledons, hypocotyls, flowers, leaves and siliques (PubMed:23893219). Up-regulated in the epidermis of stems (PubMed:16299169). Mainly present in proliferating tissues (PubMed:21558309). In flowers, expressed in stamens, carpels, petals, sepals and pedicels (PubMed:23893219). Accumulates progressively in leaves during aging (PubMed:23893219). Increased susceptibility to penetration of the epidermal cell wall by the non-host mildew fungal agent Blumeria graminis f. sp. hordei (Bgh) (PubMed:30102837). Some early aborted seeds and infertile ovules, and increased salt permeability in seeds associated with an increase in unsubstituted fatty acids but a decrease in omega-hydroxy fatty acids in seed coats (PubMed:24460633). Belongs to the plant LTP family. Truncated N-terminus. Extended N-terminus.