Involved in organ growth by promoting cell elongation processes. Mostly expressed in immature seed pods, and, to a lower extent, in stems and leaves (PubMed:2152168). Present in phloem and epiderm in leaves, stems, flowers and fruits (PubMed:20195610). Expressed during somatic embryogenesis, especially in cells undergoing the first anatomical modifications leading to somatic embryo development. Accumulates also during zygotic embryo development. First detected at heart-shape-torpedo transition in the whole embryos. Developmentally regulated in cotyledons and hypocotyl, being restricted to the radicule in early and late torpedo, until the embryo reaches maturity. Gradual decrease at the seed coat during seed development. After fertilization, restricted to the seed coat and endosperm. Accumulates in response to flooding stress (PubMed:2152168). Induced by salicylic acid (SA) and abscisic acid (ABA) (PubMed:2152168, PubMed:18657431). Stimulated by 16-hydroxypalmitic acid (HPA), a major component of cutin (PubMed:18657431). Reduced organ length (e.g. inflorescence axis and roots).