Abstract
Translocation in Satsuma mandarin (Citrus unshiu Marc.) were investigated by supplying 14CO2 to a leaf on the peduncle on July 25 th, 1972. The leaf, the stem and the fruit were separately divided from the plant 5 hours after absorption, and the extracts by 80% ethanol from these tissues were separated into neutral, cationic and anionic fraction. The radioactivity of neutral fraction in the stem showed 74 times and 105 times as much as that of cationic and anionic fraction, respectively, and the neutral fraction consisted of both glucose and fructose in the same ratio, but no sucrose was found in this fraction. On the other hand, the radioactivity in the flesh was found in sucrose and much less in glucose and fructose. It was observed that translocation in Satsuma mandarin occurs in the form of glucose and fructose, and then they seem to be rapidly converted into sucrose in the fruit.
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