Abstract: A study on regulating self􀀁incompat ibility of Brassica oleracea L. by inhibitor
( quercetin ) or activitor ( PMA) of protein kinase was couducted. The result showed that the quercetin increased the index of self􀀁compat ibility, even turned the self􀀁incompatible line to self-compatible line; PMA reduces the index of self-compatibility, even turned the self􀀁compatible line to self-incompatible line. This is a new method for regulating the self-incompatibility of cabbage.

Key words: Brassica oleracea L., Self􀀁, incompat ibility, Protein kinase inhibitor, Protein kinase act ivitor