Changes in Isoperoxidase Patterns of Dovetree Davidia involucrata Seeds During Stratification

After Dovetree seeds were stratified for five months, it was found to contain thirteen isoenzyme bands on isoperoxidase pattrns. The number changes ofisoenzyme bands were also observed, but no new isoenzyme bands occurred for differentstages during stratification. The isoehzyme bands gradually decreased with increasing ofstratification days of seeds and there were only five isoenzyme bands shown on theisoperoxidase pattrns when seeds germinated, but activity of these isocnzyme bands werestronger. Peroxidase activity of the germinating seeds which stratified for two years wastwo times of that of seeds which were still dormant.