Behavior of carbon from sucrose and asparagine after introduction to flag leaf of rice plant during ripening

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Abstract
14C-[U] -sucrose and L-14C-[U]-asparagine were taken up from the tip of the lag leaf at the milking stage of rice plant, which was grown without nitrogen application after lowering, and the behavior of 14C was studied. The results were as follows. Thus, during the translocation of the nitrogen compounds from the leaves to the harvesting organs, the proteins of leaves were decomposed into amino acids in the leaves. The amino acids thus produced were translocated to the harvesting organs, and the proteins were reconstructed there from the free amino acids. During these processes it was considered that an active exchange of carbon skeletons of amino acids took place.