Extracellular signal peptide that regulates cell fate. Represses root apical meristem maintenance. Regulates the transition of protophloem cells from proliferation to differentiation, thus impinging on postembryonic growth capacity of the root meristem; this signaling pathway requires CRN and CLV2 (PubMed:28607033). Expressed in stems, apex, leaves, flowers, siliques and pollen. The O-glycosylation (arabinosylation) of the hydroxyproline Pro-102 enhances binding affinity of the CLE10p peptide for its receptor. Belongs to the CLV3/ESR signal peptide family.