生命科学研究2025，Vol.29Issue(6)：502-509,8.DOI:10.16605/j.cnki.1007-7847.2025.07.0148
糖分供给对小环腹瘿蜂寄生能力及其宿主黑腹果蝇存活与发育的影响
Effects of Sugar Supply on the Parasitism of Leptopilina sp.and the Survival and Development of Its Host Drosophila melanogaster
摘要
Abstract
The trade-off between defense capability and resource supply is a core issue in host resistance to parasitic stress,yet systematic research on how resource levels quantitatively regulate host defense efficacy remains lacking.To investigate the regulatory role of sugar supply in the resistance of Drosophila melanogaster to parasitic pressure from Leptopilina sp.,three sugar concentration gradients including low(10％),medium(20％),and high(30％)were established,and both immune defense and developmental indices of D.melano-gaster under different resource supply conditions were systematically measured.The results showed that:1)The medium-sugar group demonstrated an optimal balance between defense and development.Flies in this group not only exhibited significantly lower mortality under parasitic stress than those in the low-sugar group,but also maintained optimal levels of pupation rate,eclosion rate,and adult body size,suggesting that mode-rate resource supply effectively optimizes energy allocation;2)The high-sugar environment did not confer additional defense benefits but instead induced significant negative effects.Compared with the medium-sugar group,the high-sugar group showed a substantial decrease in pupation and eclosion rates,a significant in-crease in mortality,and a marked reduction in adult body size under parasitic stress.The study indicates that the regulation of host defense efficacy by sugar supply is characterized by a distinct threshold effect.Moderate increase in sugar supply helps reduce the physiological burden on the immune system,whereas excessive supply leads to metabolic imbalance and consequently weakens the overall fitness of D.melanogaster under parasitic pressure.These findings provide new perspectives for understanding insect nutritional immunology and the ecological control of agricultural pests.关键词
黑腹果蝇/寄生蜂/资源供给/生长发育/防御能力Key words
Drosophila melanogaster/parasitoid wasp/resource allocation/growth and development/defense capacity分类
生物科学引用本文复制引用
舒欣,习新强,徐萍萍,张雨晴,侯智文,施如康,杨允菲,徐健,韩大勇..糖分供给对小环腹瘿蜂寄生能力及其宿主黑腹果蝇存活与发育的影响[J].生命科学研究,2025,29(6):502-509,8.基金项目
伊犁师范大学校级科研项目(YLUKLM2022002) （YLUKLM2022002）
