短时高温胁迫对斑痣悬茧蜂发育指标的影响

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 短时高温胁迫对斑痣悬茧蜂发育指标的影响 DOI: 10.5846/stxb201511142311 作者: 作者单位: 南京农业大学植物保护学院,南京农业大学植物保护学院,南京农业大学植物保护学院 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目（31570389）；国家科技支撑计划项目（2012BAC19B01）；国家公益性行业（农业）科研专项（200903003，201103002） Effects of short-term heat stress on developmental parameters of Meteorus pulchricornis (Hymenoptera: Braconidae) Author: Affiliation: Plant Protection College,Key Laboratory of Integrated Management of Crop Diseases and Pests,Ministry of Education,Nanjing Agricultural University,Plant Protection College,Key Laboratory of Integrated Management of Crop Diseases and Pests,Ministry of Education,Nanjing Agricultural University,Plant Protection College,Key Laboratory of Integrated Management of Crop Diseases and Pests,Ministry of Education,Nanjing Agricultural University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:全球气候变化不仅包括平均气温上升，而且诸如热浪的极端天气事件出现的频率和程度也增大。寄生蜂虽在寄主体内完成生长发育，也会受到极端气温的影响。为探究短时高温对寄生性天敌斑痣悬茧蜂（Meteorus pulchricornis）幼虫发育表现的影响，以斜纹夜蛾（Spodoptera litura）幼虫为寄主，分别对1-6日龄子代蜂进行39℃、持续4h的高温胁迫处理，以发育全程进行适温（昼29℃、夜26℃）处理为对照，观察子代存活、发育历期、羽化和成虫寿命等发育指标。高温胁迫处理1日和5日龄子代蜂幼虫使幼虫存活率下降，与对照相比分别降低36.1%和28.6%；高温胁迫可延长子代蜂幼虫发育历期，与对照相比，高温处理2、3、5日和6日龄子代蜂幼虫使幼虫发育历期分别延长了5.0%，5.2%，7.0%和12.1%；高温胁迫处理5、6日龄子代蜂幼虫使羽化出的成虫体型（用后足胫节长度表示）比对照分别减小1.8%和2.6%。高温胁迫处理对子代蜂蛹发育历期、羽化率以及成虫寿命等均没有显著影响。研究结果说明，短时高温胁迫对斑痣悬茧蜂高龄幼虫的负面影响比对低龄幼虫大。 Abstract:Global warming causes an increase in the average temperature butalso the intensity and frequency of extreme climatic conditions, such as short heat notoly waves. Extreme temperatures can impact parasitoid growth and development in hosts. Therefore, to understand the effect of heat waves on parasitic natural enemies of insect pests, we made laboratory experiments to examine developmental performances of the offspring of the solitary endoparasitoid, Meteorus pulchricornis, using Spodoptera litura larvae as hosts. Offspring parasitoids in the hosts received the heat shock treatment by 39℃ for 4 hours at the age of 1, 2, 3, 4, 5, or 6 days old after parasitism. Developmental survival, duration, adult body size, and longevity of offspring parasitoids were observed. Larval survival to pupa decreased in the host larvae that received the heat treatment at the age of 1 d and 5 d, by 36.1% and 28.6%, respectively, compared to controls. Larval duration was prolonged by 5.0%, 5.2%, 7.0%, and 12.1%, respectively, in the host larvae that received the heat treatment at the age of 2, 3, 5, and 6 d, respectively, compared to control. Adult hind tibia length decreased by 1.8% and 2.6%, respectively, in the hosts that received the heat treatment at the age of 5 and 6 d. Pupa-to-adult duration, pupa-to-adult emergence rate, and adult longevity were not influenced by the heat shock treatment. The results of the present study suggest that older larvae of M. pulchricornis were more vulnerable to heat waves than younger ones. 参考文献 相似文献 引证文献