Effects of zinc acquired through the plant-aphid-ladybug food chain on the growth, development and fertility of Harmonia axyridis
文献类型： 外文期刊
作者： Shi, Zuokun 1 ; Wang, Shasha 1 ; Pan, Biying 1 ; Liu, Yongkang 1 ; Li, Yan 1 ; Wang, Shigui 1 ; Wang, Su 2 ; Tang, Bin 1 ;
作者机构： 1.Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou, Zhejiang, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing Key Lab Environm Friendly Management Frui, Beijing, Peoples R China
关键词： Coleoptera; Vicia faba; Trophic level; Female fertility; Bioaccumulation
期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）
ISSN： 0045-6535
年卷期： 2020 年 259 卷
页码：
收录情况： SCI
摘要： Heavy metal pollution is an increasingly serious problem in agricultural ecosystems. Zinc accumulation in the food chain may harm the physiological functions of organisms, including herbivorous and predatory insects. Its effects on development and reproduction in Harmonia axyridis are largely unknown. In this study, five Zn solutions (25, 50, 100, and 150 mg/kg) plus control (0 mg/kg) were used to treat broad beans and to water the resulting seedlings. Aphids fed on these seedlings were eaten by H. axyridis ladybugs. Zn accumulation was found at all three trophic levels. Compared with the control group, ladybugs in the 25, 50, and 100 mg/kg groups had significantly reduced weight gain from the 4th instar to adulthood. Pupae and larvae (instars 1-4) in the 150 mg/kg group had the lowest survival of any group; pupal mortality in the 100 mg/kg group was significantly higher than that in the control group. Under Zn stress, female adults had inhibited expression of Vg1, Vg2 and VgR, reducing egg production and hatchability. Zn thus negatively affected their fertility. These results provide a theoretical basis for future exploration of soil heavy metal pollution impacts in ecosystems. (C) 2020 Elsevier Ltd. All rights reserved.
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