Carbohydrate Translocation from Small Tillers to Spike-producing Shoots in Wheat

A PREVIOUS autoradiographic study1 suggested that carbohydrate was not translocated from small unproductive tillers to the main shoot and other spike-producing tillers in wheat. We have now shown, using a more sensitive technique for the recovery of radioactivity, that radiocarbon can be recovered in the growing points of spike-developing shoots of young plants, a small tiller of which has been dosed with 14CO2.