DPC对麦套棉~(14)C同化物运转分配及再分配的影响

试验结果表明，棉花（Ｇ．ｈｉｒｓｕｔｕｍＬ．）苗期、蕾期和花铃期ＤＰＣ化调可显著增加１４Ｃ同化物在根、蕾及花铃中的分配率，降低１４Ｃ同化物在顶（边）心中的分配率。从苗期到花铃期，随着生育期的延后，在吐絮阶段茎叶等营养器官滞留的１４Ｃ同化物逐渐减少，棉铃尤其是子棉的分配比率逐渐提高。ＤＰＣ化调减少了茎叶和铃壳的１４Ｃ同化物滞留量，增加了在子棉和根中的分配率。

Effect of DPC on Translocation Redistribution or 14 C Assimilate of Cotton Interplanted with Wheat

It was found that DPC significantly increased the patrtitioning percentage of 14 C assimilates into roots, squares, flowers and bolls of cotton (G.hirsutum L.) plant, while decreased the partitioning percentage of 14 C assimilates into buds at seeding, squaring, flowering and fruiting stages, respectively. The experimental results indicated that partitioning percenage of 14 C assimilates produced at seeding, squaring, flowering and fruiting stage into the seed cotton during fruiting dehiscence became higher and higher, while the percentage of 14 C assimilates remained in vegetative organs (including boll hulls) became lower and lower, as cotton plants grew and developed. As affected by DPC, the percentage of 14 C assimilates remained in vegctative organs increased, but the percentage of 14 C assimilates into seed cotton decreased.