绞股兰对果蝇寿命的影响

绞股兰提取物0.5％、1.0％浓度对雄性果蝇平均寿命分别延长11.8％和12.2％。0.25％浓度对雌雄蝇平均寿命分别延长18.5％和24.1％。0.5％绞股兰提取物在孵育期的卵开始给药,其平均寿命比成虫(30日龄)开始给药有明显延长,延长百分率前者为53.3％(♂)、46.1％(♀),后者为14.4％(♂)、9.7％(♀)。绞股兰提取物能促进果蝇幼虫的生长发育,但对果蝇的性活力未见影响。

EFFECT OF GYNOSTEMMA PENTAPHYLLUM ON THE LIFE SPAN OF FRUIT FLY

The influence of Gynostemma pentaphyllum extract ( G. P ) on the life span of fruit fly was observed. G. P (0.5% and 1.0%) significantly increased mean life span by 11.8% and 12.2%, respectiyely, when fed to male adults.At 0.25% concentraction, the female adults were found to yield an increase of 24.1% in mean life span and the male an increase of 18.5%.Rearing flics on 0. 5% G. P during both the developmental and adult stages proved to be even more effective than just feeding during the adult stage. The mean life span of male and female adults were increased by 53.3% and 46.1% , respectively, but at the higher concen-tration of 1.0%, the increase was 14.4% and 9.7%, respectively,G. P obviously improved the growth of larvae when given aconcentration of 0.5%,No marked change was observed in the copulatory rate of fruitflies after the treatment of 0.5% G.P.