The main indexes of bagged fruits,compared with the unbagged ones,of Gala apple during storage showed the similarly changing trend,the weight loss ration was higher,the firmness and of soluble solid content were lower,and the peak values of released ethylene and respiration appeared earlier by 20 days.

Experiment results of using double paper bags on Gala apple showed that bagging could improve outside fruit qualities, enhance fruit cleanness and brightness, increase the contents of anthocyanin, meanwhile, lower the contents of chlorophyll, then accelerate fruit color, but it had no effect on shape index of fruit.

Growth and fruit characteristics of autotetraploid plants of Royal Gala apple;

The leaf anatomical features, stomata characters and photosynthetic characteristics of Royal Gala apple (Malus domestica) autotetraploid plants were studied in comparison with that of diploid plants.