Abstract: The characteristics of translocation and distribution of ¹⁴ C-assimilate in peach under protected culture were investigated by ¹⁴ C tracing technology. The results showed that ¹⁴ C-assimilates were mainly distributed to the fruit, and the amount of ¹⁴C-assimilates distributed to the fruit was increased with the growth of fruit at the stage of fruit enlargement and fruit ripening. The assimilates remained in leaves were lesser than that distributed to fruits, and the amount of remained ¹⁴C-assimilates decreased with the growth of fruit. The radioactivity ratio of fruit was the most active during different organs, the radioactivity ratio of leaves and roots was more active than others. It showed that the peach under protected culture had the highest requirement and
competition ability to absorb ¹⁴ C-assimilates at the stage of fruit enlargement and fruit ripening.

Key words: Peach, Protected culture, ¹⁴ C-assimilate, Distribution