设施栽培中桃树^(14)C同化物分配特性的研究

Studies on the Characteristics of Distribution of ^(14)C-assimilates in Peach under Protected Culture

利用放射性同位素14C-示踪方法研究了设施桃树果实不同发育时期14C同化物的运转分配特性。结果表明:在果实膨大期和果实成熟期,分配到果实中的14C同化物最多,随着果实生长,分配到果实中的14C同化物比例增加。叶片的自留量小于果实获得的14C同化物量,且随着果实的生长,叶片的自留量逐渐减少。在各器官中果实的放射比活性最强,其次为叶片与根系。说明果实膨大期和果实成熟期是设施桃树对碳素同化物需求和竞争最大的时期。

The characteristics of translocation and distribution of ^14C-assimilate in peach under protected culture were investigated by ^14C tracing technology. The results showed that ^14C-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 ^14C-assimilates at the stage of fruit enlargement and fruit ripening.