Extracellular signal peptide that regulates cell fate. Represses root apical meristem maintenance. Acts as an elicitor of the root meristem differentiation through the CLV2/CRN complex signaling pathway (PubMed:20697738, PubMed:28586647). Inhibits irreversibly root growth by reducing cell division rates in the root apical meristem (PubMed:20697738, PubMed:28586647). 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). Interacts with the extracellular leucine-rich repeat region of CLV2 and PEPR2. Mostly expressed in roots, and, to a lower extent, in seedlings and leaves (PubMed:12602871). Expressed in the primary root tip under Pi deficiency (PubMed:28586647). Expressed specifically in differentiating cells of the root. Induced by Pi starvation. The O-glycosylation (arabinosylation) of the hydroxyproline Pro-74 enhances binding affinity of the CLE14p peptide for its receptor. Belongs to the CLV3/ESR signal peptide family.