کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424276 1619164 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Uptake and bioaccumulation of Cry toxins by an aphidophagous predator
ترجمه فارسی عنوان
جذب و تجمع مواد سمی Cry با تغذیه کننده aphidophagous
کلمات کلیدی
سم BT؛ کفشدوزک؛ ماندگاری؛ مواجهه Tritrophic
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• Uptake and bioaccumulation of two Cry toxins by a larval coccinellid was tested.
• Uptake was demonstrated by presence of the toxins in pupae and adults.
• Bioaccumulation was shown by higher toxin concentration in pupae than prey.
• Cry1Ac was present 2.05× and Cry1F 3.09× higher in predator pupae than prey.
• This might increase persistence of Cry toxins in food webs with new exposure routes.

Uptake of Cry toxins by insect natural enemies has rarely been considered and bioaccumulation has not yet been demonstrated. Uptake can be demonstrated by the continued presence of Cry toxin after exposure has stopped and gut contents eliminated. Bioaccumulation can be demonstrated by showing uptake and that the concentration of Cry toxin in the natural enemy exceeds that in its food. We exposed larvae of the aphidophagous predator, Harmonia axyridis, to Cry1Ac and Cry1F through uniform and constant tritrophic exposure via an aphid, Myzus persicae, and looked for toxin presence in the pupae. We repeated the experiment using only Cry1F and tested newly emerged adults. Both Cry toxins were detected in pupae, and Cry1F was detected in recently emerged, unfed adults. Cry1Ac was present 2.05 times and Cry1F 3.09 times higher in predator pupae than in the aphid prey. Uptake and bioaccumulation in the third trophic level might increase the persistence of Cry toxins in the food web and mediate new exposure routes to natural enemies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 209, February 2016, Pages 164–168
نویسندگان
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