Abstract: There are at least nine members in the plant peptides, whose protein sequences have been published . Basing on the cell-to-cell interaction′s pattern of“ligand-receptor”, four peptides have been accepted as peptide hormones, including Systemin , Phytosulfokine, SCR􊄯SP11 and CLV3 , which are involved in wounding respond , cell proliferation , percipience between pollen and stigma in self- incompatibility , and balancing division and differentiation in the shoot apical meristem (SAM) , respectively . Here, we outline recent understanding of these four plant peptide hormones, meanwhile make a prospection according to our research′s advance .

Key words: Phytosulfokine