[Change in the phosphatase activity in rice seeds of varying germination].

Activities of ATPase, acid and alkaline pyrophosphatases and phytase in the germs and endosperms of rice seeds of varying germinative power were measured during their swelling and germination. Maximum ATPase activity was found in the cytoplasmic fraction. Activity of pyrophosphatase was higher in the germ and that of phytase in the endosperm. As the swelling and germination continued, the enzyme activity increased. Losses of germinating power during prolonged storage were accompanied by a decline in the activity of the enzymes which, however, never disappeared; the activity of pyrophosphatases was maintained by 55-70% and that of ATPase and phytase by 40-44%.