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, probably by 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 siliques, stems, hypocotyls, shoot apex, leaves, flowers and cotyledons, and, to a lower extent, in roots. Absent from the primary root (PubMed:23370719). Induced during lateral root formation after the emergence of the primordium and in mature lateral roots (PubMed:23370719). Expressed homogeneously across the cotyledon (PubMed:23370719). In leaves, expressed in the whole lamina, with a stronger signal in the outer part of the leaf (PubMed:23370719). Higher levels in younger leaves and fades out as leaves expand (PubMed:23370719). Observed in the stem and sepals, and in the gynoecium of the developing flowers, 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 with an impaired formation of auxin gradients, thus leading to an irregular waves root shape. 'Golven' means irregular waves in Dutch. Belongs to the RGF family.