紫外长期胁迫对高世代麦长管蚜生命表参数的影响

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 紫外长期胁迫对高世代麦长管蚜生命表参数的影响 DOI: 10.5846/stxb201709221699 作者: 作者单位: 昆虫生态实验室,昆虫生态实验室,昆虫生态实验室,昆虫生态实验室,昆虫生态实验室 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（39970112，20470268）；高校博士点基金（20130204110004）；陕西省科技厅国际合作项目（2012） Effects of ultraviolet continuous processing on life table parameters of high generations of Sitobion avenae (Fabricius) Author: Affiliation: Insect ecology laboratory,Insect ecology laboratory,Insect ecology laboratory,Insect ecology laboratory,Insect ecology laboratory Fund Project: National Natural Science Foundation of China ( NSFC ) 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:为了评估紫外连续处理对第20代以后麦长管蚜Sitobion avenae（Fabricius）种群动态的影响，采用特定年龄生命表方法，设置不同强度（0，0.50，0.70 mW/cm2）UV-B连续多代处理麦长管蚜成虫，统计经紫外处理后的麦长管蚜第22代，第27代，第32代，第37代麦长管蚜生命表种群参数的变化并总结了1-37代麦长管蚜内禀增长率的变化规律。结果表明：（1）处理组供试麦长管蚜平均世代周期（T）呈先显著升高后下降的趋势。（2）低强度处理组内禀增长率（rm）、净增殖率（R0）、周限增长率（λ）均呈先升高后下降又升高的趋势，高强度处理组供试麦长管蚜内禀增长率（rm）、净增殖率（R0）、周限增长率（λ）呈先下降后显著升高的的趋势，且均在G37达到最大值。（3）1-37代处理组麦长管蚜rm呈现先显著增高后下降又升高又下降又显著升高的变化规律，且均在G37达到最大值。由此可见：麦长管蚜经过多代的UV-B胁迫后，对其生命表参数的影响依然显著，在G37麦长管蚜对紫外的适应能力最强。本研究的创新点在于解析了第22代以后紫外胁迫对麦长管蚜种群动态的影响，从而为全面深入的阐述紫外胁迫对麦长管蚜生长繁殖的影响规律，掌握不同紫外胁迫下的剂量效应关系及麦长管蚜的适应性提供实验基础和理论依据。 Abstract:With the appearance of the hole in the ozone and depletion of the stratosphere and the ozone, there is increasing concern about the changing trend in UV-B radiation levels and the impact of increased UV-B on organisms and ecosystems. As the environment is continuously being destroyed, irradiation intensity of UV-B has been enhanced. The aphid, Sitobion avenae (Fabricius), belonging to the suborder Homoptera, and the family Aphididae, is distributed in wheat-producing regions in China. Aphids are parasites of wheat, barley and oats, rice, corn, sugar cane, and grasses in southern China. In the early stages, aphids accumulate on the front or back of leaves, and in the later stages, they accumulate in ear to suck out the fluid, causing the injured plant to experience reduced growth, tiller reduction, 1000-grain weight. Aphids are an important pest in grain crops, which are also the dominant plants attacked by aphids that have a short growth cycle, breed quickly, and are highly adaptable. Studies on the effects of UV-B on insects are rare. Thus, additional studies are required to predict the effect of increased UV-B irradiation on the genetic evolution of S. avenae). In order to investigate the effects of ultraviolet continuous processing on the population dynamics of S. avenae after the 20th generation, we adopted certain age life tables to calculate the S. avenae life table parameters and used different strength UV-B (0, 0.50, and 0.70 mW/cm2) to treat S. avenae after the 20th generation. This analysis was intended to provide a theoretical foundation for understanding the long-term development, growth, and reproduction of S. avenae. Changes in the population parameters of the 22nd generation, the 27th generation, the 32nd generation, the 37th generation, and the intrinsic rate of increase from the first generation to the 37th generation of the aphid were studied. The results showed that:(1) The average generation cycle (T) of treatments significantly increased and then decreased; (2) in the low-intensity treatment group, intrinsic rate of increase, net appreciation rate, and weekly growth rate increased first and then decreased, before increasing again; in the high-intensity treatment group, net appreciation rate, weekly growth rate, and fecundity decreased first and then significantly increased, and they all reached the maximum in the 37th generation; and finally, (3) in the treatment group, the intrinsic rate of increase of the aphids significantly increased and then decreased twice and then significantly increased. Our study showed that after several generations of UV-B stress, the effect on the life table parameters was significant and the ability of aphids to adapt to UV radiation was strongest in the 37th generation. The aim of this study was to reveal and analyze the effects of UV stress on population dynamics of Sitobion avenae after the 22nd generation. Consequently, our data provide a long-term and in-depth understanding of the developmental effects of UV stress on the growth and reproduction of Sitobion avenae. In addition, the findings provide experimental and theoretical bases for elucidating the dose-effect relationship under different ultraviolet stress levels and the adaptability of a long-tube aphid to increased UV-B levels. 参考文献 相似文献 引证文献