Effects of different sugar sources on pollen germination and the pollen tube growth of bulb flowers
The effects of starch,fructose,maltose,glucose,lactose and sucrose on germination rates of pol-lens and the pollen tube growth of several bulb flowers were investigated.The results showed that the appropriate sugar source and treatment concentration varied with different bulb flowers.The dependence of germination and pollen tube growth on sugar sources varied with plant species,Pollen germination of Tulipa,Gladiolus,and Hya-cinths was independent on the addition of sugar sources.Among sugar sources,the promotion of lactose on pollen germination and pollen tube growth were most significant.The effects of sugar source which was next to lactose were different in pollen germination of these bulb flowers.Glucose was suboptimal during Gladiolus gandavensis,Tulipa gesneriana and Hyacinthus orientalis pollen germination,while maltose and sucrose were suboptimal sugar source for Lilium orential 'Sorbonne' and LiLum davidi var unicdor cotton.