Impact of fipronil on the mushroom bodies of the stingless bee Scaptotrigona postica

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorJacob, Cynthia R. O.
dc.creatorSoares, Hellen M.
dc.creatorNocelli, Roberta C. F.
dc.creatorMalaspina, Osmar
dc.date2015-03-18T15:52:35Z
dc.date2016-10-25T20:23:37Z
dc.date2015-03-18T15:52:35Z
dc.date2016-10-25T20:23:37Z
dc.date2015-01-01
dc.date.accessioned2017-04-06T06:58:38Z
dc.date.available2017-04-06T06:58:38Z
dc.identifierPest Management Science. Hoboken: Wiley-blackwell, v. 71, n. 1, p. 114-122, 2015.
dc.identifier1526-498X
dc.identifierhttp://hdl.handle.net/11449/116211
dc.identifierhttp://acervodigital.unesp.br/handle/11449/116211
dc.identifier10.1002/ps.3776
dc.identifierWOS:000346034600015
dc.identifierhttp://dx.doi.org/10.1002/ps.3776
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/926862
dc.descriptionBACKGROUND: Studies on stingless bees are scarce, and little is known about these insects, especially regarding the effects of contamination by neurotoxic insecticides, which can cause damage to important structures of the insect brain. This study evaluated the morphological changes in the intrinsic neurons of the protocerebral mushroom bodies (Kenyon cells) of the stingless bee Scaptotrigona postica after exposure to different doses of fipronil, using light microscopy and transmission electron microscopy. This region of the brain was selected for analysis because of its importance as a sensory integration centre.RESULTS: In both oral and topical treatments, Kenyon cells presented pyknotic profiles, suggesting cell death. Statistical analysis showed significant differences among doses and exposure times. Transmission electron microscopy revealed changes in the nucleus and cellular organelles. Depending on the dose, the characteristics observed suggested apoptotosis or necrosis.CONCLUSION: This study demonstrates the toxic effects of fipronil. An increase in the number of pyknotic profiles of Kenyon cells of mushroom bodies was observed even at the sublethal doses of 0.27 ng AI bee(-1) and 0.24 ng AI mu L-1 in the topical and oral treatments respectively. Also, differences in the number of pyknotic profiles were dose and time dependent. (C) 2014 Society of Chemical Industry
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherWiley-Blackwell
dc.relationPest Management Science
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectapoptosis
dc.subjectcytotoxicity
dc.subjectphenylpyrazole
dc.subjectnecrosis
dc.subjectnervous system
dc.titleImpact of fipronil on the mushroom bodies of the stingless bee Scaptotrigona postica
dc.typeOtro


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