水稲の茎葉基部に於ける澱粉粒の形成に就いて

抄録

We have made a study about the reserve starch which is accumulated as stored starch grains in the parenchymatous cells at the base of the shoot of the rice plant. The result of the observation is as follows : Reserve starch is seen to accumulate, though rather small amount it is in the parenchymatous cells near the growing point of the shoot (Fig. l-I). Much larger amount is accumulated at the bade of both the leaf sheath and the stem (Fig. 1-III-IV). The amount of such reserve starch was estimated by the degree of staining with 0.1% J-KJ solution. The amount was seen to decrease after transplanting, to increase after the end of tillering stage, and to decrease again after heading, as a result of the translocation of the starch to the kernels. The amount was also decreased with increased supply of nitrogen.