关键词: 中国樱桃, 花器官, 花粉萌发

Abstract: Characteristics of blossom phenophase,floral organs and fruits of three Chinese cherry cultivars, ‘Duan bing＇, ‘Hei zhenzhu＇, ‘Da yingzui＇ were investigated in Zhejiang mountainous areas. The results showed that the blossom phenophase greatly differed among these cuhivars, ‘Da yingzui＇ blossomed firstly, ‘Hei zhenzhu＇ blossomed latest. No significant difference was observed in pistil length and ovary diameter among the three cultivars. There were significant differences in petal color,shape,corolla size and pollen quantity. A significant correlation was found between corolla diameter and fruit weight. It was indicated that sucrose was important for the cherry pollen to maintain the external osmotic pressure and addition of an appropriate amount of boric acid was greatly beneficial to the germination of pollen in vitro through the investigation of pollen germination ratio and pollen tube elongation rate of ‘Duan bing＇. When the concentration of sucrose was 30 g/L and boric acid was 3 g/L,the internal and external osmotic pressure of ‘Duan bing＇ could keep balance and the ratio of pollen germination was the highest. The optimal temperature for the pollen germination and pollen tube elongation rate was 25℃. Therefore,low temperature in the early spring was a obstacle for the pollen germination and pollination of Chinese cherry.

Key words: Chinese cherry, floral organ, pollen germination