曙光油桃果实发育过程中蔗糖积累与相关酶的关系

以曙光油桃为试材，研究了发育过程中蔗糖积累与相关酶活性的关系。结果表明：发育早期，曙光油桃果实的果糖和葡萄糖含量相对较高，随着果实的发育，果糖和葡萄糖含量逐渐降低，而蔗糖含量急剧上升并成为主要可溶性糖。相关分析结果表明：在整个发育过程中，细胞壁酸性转化酶、可溶性中性转化酶与曙光油桃果实的蔗糖含量呈显著的负相关，蔗糖合酶与蔗糖含量呈极显著的正相关。由此表明，曙光油桃果实的蔗糖积累主要受到转化酶和蔗糖合酶的调控。

Studies on the Relationships between Sucrose Accumulation and Related Enzymes Activities in Developing 'Shuguang' Peach Fruit

The changes of sucrose accumulation and related enzyme activities in sugar metabolism were studied with ‘Shuguang’ peach during fruit development. The results showed that fructose and glucose were the main soluble sugar at the early development stage, and then declined gradually with fruit developing. On other hand, the sucrose content increased significantly and become the mostly sugar at the later stage of fruit development. The correlation analysis indicated that the activities of the cell wall-bounded acid invertase and soluble neutral invertase had significant negative correlation with sucrose contents in the whole stage of fruit development. Moreover, the activity of sucrose synthase also showed a highly positive correlation with sucrose accumulation during fruit development. It is concluded that the sucrose accumulation in ‘Shuguang’ peach fruit mainly dominated by invertase and sucrose synthase.