中文摘要：

蔗糖是植物光合作用及物质转运的主要形式,植物体内重要的信号物质,并且为植物生长代谢提供碳源与能量。而在蔗糖转运过程中,蔗糖载体（SUT）发挥着不可替代的作用。首先介绍了植物中＂源、库、流＂理论和蔗糖载体基因分离,阐述了蔗糖载体在蔗糖由＂源＂到＂库＂转运过程中发挥的作用,及与农艺性状的关系,并阐明蔗糖在植物体生长发育过程中的作用。归纳总结了蔗糖载体介导的蔗糖跨膜转运过程,进而探讨了蔗糖跨膜转运存在的问题。

英文摘要：

Sucrose,the major product of photosynthesis in autotrophic organs,is the main transport form of carbohydrate from sites of primary assimilation to heterotrophic tissues in many plant species.During the process of transporting source from organs to sink organs,sucrose transporters（SUTs） played an important role in both loading and unloading processes.In this paper,the theory of’source-flow-sink’in plants and the isolation of sucrose transporter gene were firstly introduced.Then the functions of sucrose transporter were described during sucrose transporting from source to sink,in turn the relationship of sucrose transporter and agronomic traits were discussed.Furthermore,sucrose transporter could effect plant growth and development.Totally,the path of sucrose translocation mediated by sucrose transporter was summarized.However,there were still some questions in the trans-membrane transport process.