植物中糖转运途径、糖转运蛋白及其生理功能

植物源叶进行光合作用而固定大气中的CO2，为汇组织或器官提供了能源和碳源。碳从源到汇的转运以糖的形式尤其是蔗糖进行的。糖在韧皮部中的运输是由糖转运蛋白完成的，糖转运蛋白具有双重功能，即糖载体和糖传感。糖在植物体内的转运直接影响到植物的生理活动，如光合作用和碳分配。如何使光合作用所固定的碳朝人们所希望的方向转运是研究糖在植物体内转运及糖转运蛋白的生理功能的根本目的，因此，这些研究对于提高农作物和林木的生产力具有重大意义。

Advances in Research on Sugar Transport Pathway, Sugar Transporters and Their Physiological Functions in Plants

Plant source leaves fix CO_2 in atmosphere by photosynthesis and provide sink tissues or organs with energy and carbon source. Carbon is transported from source to sink in the form of sugars, especially sucrose. Sugar transport in phloem depends on sugar transporters, and sugar transporters have dual functions, i.e. sugar carrier and sugar sensing. Sugar transport in plants has direct influences on physiological activities of plants, e.g. photosynthesis and carbon partitioning. The primary aim of researches on sugar transport and sugar transporter in plants is to find out how to regulate transport of fixed carbon by photosynthesis toward the places that carbon is expected to accumulate, thus these researches are of great significance for improving productivity of crops and forest trees.