The mature peptide has antifungal activity against germinated and ungerminated spores of A.alternata (IC(50)=7.4 uM and IC(50)=12.5 uM, respectively), A.niger (IC(50)=2.8 uM and IC(50)=4.0 uM, respectively), B.cinerea (IC(50)=9.3 uM and IC(50)=16.2 uM, respectively), F.oxysporum (IC(50)=8.0 uM and IC(50)=5.4 uM, respectively) and F.solani (IC(50)=8.0 uM and IC(50)=7.2 uM, respectively). Has no activity against B.sorokiniana, P.infestans and P.ultimum. Has no antibacterial activity towards C.michiganensis, E.carotovora, E.coli and P.syringae at concentrations up to 40 uM. Expressed in seeds (at protein level). Expressed in flowers but not in leaves, stem or roots. Expressed in seedlings and mature plants. The presence of two CXXXC motifs with connectivity I-IV, II-III structurally identifies this peptide as an alpha-hairpinin. Eleven additional peptides containing a similar cysteine pattern are predicted from this sequence. However, there is only tentative evidence.