Scientific Reports:新烟碱类农药会影响亚洲蜜蜂的气味学习
来源:生物谷 2015-06-25 11:33
蜜蜂是自然界非常重要的授粉者。数量众多的有花植物的授粉,例如很多兰花的授粉,其首要昆虫都是蜜蜂。当蜜蜂的授粉行为受到影响时,相应地,这些植物的正常传粉和雌花受孕都受到很大影响。近期发表在《Scientific Report》上报道的一项研究表明,新烟碱类农药吡虫啉,会影响亚洲蜜蜂通过嗅觉找到花粉源的学习行为的显著障碍。削弱这学习种行为会减少亚洲蜂的觅食行为,从而会对蜂群的健康产生负面影响。
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A neonicotinoid impairs olfactory learning in Asian honey bees (Apis cerana) exposed as larvae or as adults
Xenobiotics such as the neonicotinoid pesticide, imidacloprid, are used globally, but their effects on native bee species are poorly understood. We studied the effects of sublethal doses of imidacloprid on olfactory learning in the native honey bee species, Apis cerana, an important pollinator of agricultural and native plants throughout Asia. We provide the first evidence that imidacloprid can impair learning in A. cerana workers exposed as adults or as larvae. Adults that ingested a single imidacloprid dose as low as 0.1 ng/bee had significantly reduced olfactory learning acquisition, which was 1.6-fold higher in control bees. Longer-term learning (1-17 h after the last learning trial) was also impaired. Bees exposed as larvae to a total dose of 0.24 ng/bee did not have reduced survival to adulthood. However, these larval-treated bees had significantly impaired olfactory learning when tested as adults: control bees exhibited up to 4.8-fold better short-term learning acquisition, though longer-term learning was not affected. Thus, sublethal cognitive deficits elicited by neonicotinoids on a broad range of native bee species deserve further study.
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