Abstract:Transportation and distribution of photosynthate in ramie plant were studied by using 14CO2 as tracer.The result showed that there was no trasportation of photosynthate formed in young leaves to other parts of the same plant.Photosynthetic capacity of mature leaves was larger than that of young leaves.The photosynthate formed in mature leaves could be transported mainly to the stem,and the young leaves on the upper part of the stem,and most of the photosynthate was stored in the stem.There was no photosynthate transportation and distribution from one stem to another of the same plant.