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Ecotoxicological effects of common fungicides on the eastern honeybee Apis cerana cerana (Hymenoptera)

文献类型： 外文期刊

作者： Huang, Minjie 1 ; Dong, Jie 1 ; Yang, Shuyuan 1 ; Xiao, Minghui 1 ; Guo, Haikun 3 ; Zhang, Jiawen 1 ; Wang, Deqian 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Anim Husb & Vet Sci, 145 Shiqiao Rd, Hangzhou 310021, Peoples R China

2.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, 666 Wusu St, Hangzhou 311300, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, 198 Shiqiao Rd, Hangzhou 310021, Peoples R China

关键词： Apis cerana; Fungicide exposure; Gut; Risk assessment; Sublethal effects

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 868 卷

页码：

收录情况： SCI

摘要： The widespread use of fungicides for plant protection has increased the potential for pollinator exposure. This study therefore aimed at assessing the acute and chronic effects of fungicides on pollinators. For this purpose, the acute oral toxicity of the common fungicides azoxystrobin, pyraclostrobin, and boscalid to Eastern honeybee Apis cerana cerena was first evaluated, and the chronic effects on multiple aspects were investigated after exposure to a one -tenth medium lethal dose (LD50) for 10 days. This study revealed that the LD50 values of azoxystrobin, pyraclostrobin and boscalid for adult Eastern honeybees were 12.7 mu g/bee, 36.6 mu g/bee, and >119 mu g/bee, respectively. Midgut ep-ithelial cells revealed that fungicide exposure caused increased intercellular spaces and varying degrees of vacuolization. Exposure to these three fungicides and their binary mixtures significantly affected glycerophospholipid, alanine, aspartate, and glutamate metabolism in Eastern honeybee midguts. Additionally, the relative composition of Lactobacillus, the dominant functional genus in Eastern honeybee guts decreased and microbial balance was disrupted. All fungicides and their mixtures induced strong transcriptional upregulation of genes associated with the immune response and encoding enzymes related to oxidative phosphorylation and metabolism, including abaecin, apidaecin, hymenotaecin, cyp4c3, cyp6a2 and hbg3. Our study provides important insight for understanding the effects of commonly used fungicides on nontarget pollinator and contributes to a more comprehensive assessment of fungicide effects on ecological and environmental safety.

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