梨果实糖代谢及调控因子的研究进展

Research Advances in Sugar Metabolism and Regulatory Factors in Pear Fruits

在木本蔷薇科果树中,叶片光合产物向果实运输的主要形态为山梨醇。糖从质外体空间跨膜运入共质体的过程由糖运输蛋白介导,而糖的代谢过程包括山梨醇代谢、蔗糖代谢和己糖代谢3种途径。本文综述了梨果实发育过程中糖的种类和积累类型,光合产物的运输形态、糖运输蛋白、糖代谢过程中的主要酶类与糖积累的关系以及果实发育过程中糖代谢的调控因子等方面的研究进展。

Photosynthates transported into fruits are mainly in the form of sorbitol in woody Rosaceae plants. The transport of sugars across the plasma membrane from apoplastic space into cells is mediated by sugar trans- porters. The metabolism pathways of sugar involve sorbitol metabolism, sucrose metabolism and hexose me- tabolism. In this article, we summarize the research progress of sugar kinds and accumulation type of sugar in developing fruits of pear, transport form of photosynthetic products, sugar transport protein, and the relation- ship of some related enzyme＇s activity with sugar accumulation, the role of sugar transport protein, and the reg- ulation of sugar metabolism in fruits.