Signaling peptide (root growth factor) that regulates the pattern of root growth and lateral root development by modulating the length and the number of cortical cells in the root apical meristem (RAM), and the anticlinal asymmetric cell divisions in lateral root initiation cells (PubMed:22307643, PubMed:23370719). Also involved in the regulation of hypocotyl bending and root gravitropism in a PIN2-traffic dependent manner, thus influencing the formation of auxin gradients (PubMed:22421050). Maintains the postembryonic root stem cell niche (PubMed:20798316). Binds to LRR receptor-like serine/threonine-protein kinases to trigger their dimerization with SERK proteins and subsequent signaling. The precursor is detected in the endoplasmic reticulum probably during its processing. Expressed in stems, hypocotyls, cotyledons, leaves, flowers, shoot apex, siliques, stamens and petals. Absent from the primary root (PubMed:23370719). Expressed irregularly throughout the cotyledon and accumulates at the base of the organ (PubMed:23370719). In leaves, present at a high level in the basal part, close to the main veins, irregularly in the lamina joining these veins, and in separate segments of the leaf margin (PubMed:23370719). Observed in the stem, the rachis of the inflorescence, and the lower portion of the flower pedicel, especially at its upper side (PubMed:23370719). In flowers, detected throughout its development at the base of the sepals, in the petals, the filament of the stamens and the gynoecium, and later in siliques (PubMed:23370719). During seedling gravitropic response, restricted to the epidermis and cortex and enhanced at the lower side of the reoriented hypocotyl (PubMed:22421050). Rapidly induced by auxin. Reduced hypocotyl bending and dose-dependent altered root gravitropism associated with an altered PIN2 traffic that impairs the formation of auxin gradients, thus leading to an irregular waves root shape. 'Golven' means irregular waves in Dutch. Belongs to the RGF family.