抄録
The connection between the vascular strands in the branches on the first order and the vascular strands in the upper leaves of rice plant were investigated. The results were as follows : When radioisotope (P32) solution was given to each upper leaf, the quantity of P32 that moved to the branches on the first order at the same side of the leaf given P32 was larger than that on the opposite side. But this tendency got confused when the period of giving P32 become long. The vascular strands in the branches on the first order connected with the vascular strands in flag leaf directly, and with those of leaves under flag leaf through the ring of peripheral vascular strands.
