Two cultivars IR72 (Indica) and Nipponbare (Japonica) were used with shading treatment after anthesis to study the dynamic changes of sucrose content and the activity of sucrose degradation enzymes.

• 选用IR72（籼稻）和日本睛（粳稻），在开花后遮光处理，对弱光条件下籽粒蔗糖含量的动态变化和降解酶的活性进行了研究。