Relationship between respiration metabolism and seed dormancy in Crataegus pinnatifida Bag.

In order to research the relationship between respiration metabolism and seed dormancy in Crataegus pinnatifida Bag.,the changes of respiration metabolism of seed were studied after the seeds in C.pinnatifida Bag.were stratified for a winter.The result showed that after stratification for a winter,the cell membrane conductivity of seeds was increased;the activities of G6PDH,MDH,CAT and SOD in the seeds were increased and the seed respiration was strengthened;the main path of respiration was PPP,while the change of the sum of EMP-CAT and anaerobic respiration wasn't significant,the percentage of nonsugar substance as the base material of respiration was increased significant.