^3H—PP333在花生体中的分布和降解研究

STUDIES ON DISTRIBUTION AND DEGRADATION OF ￣3H-PP333 IN PEANUT

在春花生始花后２０、３０和４０天．分别喷施３Ｈ－ＰＰ３３３，收获时茎、叶、根、种子和荚壳中ＰＰ３３３含量随着处理时间的推迟和处理次数增加而升高。在始花后３０天处理一次的种子和荚壳内ＰＰ３３３含量，分别为６７．７和１１３．７ｄｐｍ·ｇ－１Ｄｗ。荚壳的ＰＰ３３３含量多于种子。ＰＰ３３３在花生体内降解较快，在始花后２０天经ＰＰ３３３处理．３天后根、茎和叶中ＰＰ３３３含量分别比处理后１天降低６９．０％、６８．０％和７５．９％。叶片可能是ＰＰ３３３降解的主要器官。

Twenty, thirty and forty days after beginning flowering period, peanut plants were treated with 200mg. L-1PP333 respectively. In harvesting period, it is coordinated that the content of PP333 in all organs increased with treatment date delayed and treatment time increased. PP333 content in seed and shell was 67.7 and 113.7 dpm. g-1DW respectively with PP333 treatment in 30 days after beginning flowering period. The amount of PP333 in shell was more than in seed. PP333 degraded rapidly in peanut plant. The content of PP333 in root,stem and leaf in 3 days after treatment was less than that in 1 day after treatment by 69.0%, 68.0% and 75.9% respestively. Leaf may be a major organ in degarding PP333 compound in peanut plant.