Signaling peptide (root growth factor) required during root gravitropism in a PIN2-traffic dependent manner (PubMed:23370719). May be involved in maintaining the postembryonic root stem cell niche (PubMed:20798316). 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 (By similarity). Binds to LRR receptor-like serine/threonine-protein kinases to trigger their dimerization with SERK proteins and subsequent signaling. Expressed in roots, shoots, flowers and stamens. In roots, present in both the quiescent center (QC) and the root apical meristem (RAM); within the meristem, mainly present in the cortex but also in the epidermal and procambial cells closest to the QC, with very strong levels in the initials surrounding the QC (PubMed:23370719). Also present in the QC, and the first and second columella cells (CC) layers (PubMed:23370719). Induced early during lateral root formation (PubMed:23370719). Detected in the vasculature of cotyledons and leaves (PubMed:23370719). In the shoot apical meristem (SAM), present at the border between the meristem and the leaf primordia (PubMed:23370719). In flowers, accumulates in the vasculature of sepals, stamens, and petals as well as at the tip of the gynoecium and later in the siliques (PubMed:23370719). Altered PIN2 traffic. 'Golven' means irregular waves in Dutch. Belongs to the RGF family.