کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5746656 1618803 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mixtures of herbicides and metals affect the redox system of honey bees
ترجمه فارسی عنوان
مخلوط علف کش ها و فلزات بر سیستم بازسازی زنبور عسل تاثیر می گذارد
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Co-exposure to atrazine, glyphosate and Cd lowered bee carotenoid contents.
- Co-exposure to high levels of Fe decreased the accumulation of Cd in bees.
- Orally ingested Fe was bioconcentrated in bees.
- Fe induced high level of lipid peroxidation.
- Bees exposed to Fe had lower levels of 9-cis-RA and 13-cis-RA.

The increasing loss of bee colonies in many countries has prompted a surge of studies on the factors affecting bee health. In North America, main crops such as maize and soybean are cultivated with extensive use of pesticides that may affect non-target organisms such as bees. Also, biosolids, used as a soil amendment, represent additional sources of metals in agroecosystems; however, there is no information about how these metals could affect the bees. In previous studies we investigated the effects of environmentally relevant doses of herbicides and metals, each individually, on caged honey bees. The present study aimed at investigating the effects of mixtures of herbicides (glyphosate and atrazine) and metals (cadmium and iron), as these mixtures represent more realistic exposure conditions. Levels of metal, vitamin E, carotenoids, retinaldehyde, at-retinol, retinoic acid isomers (9-cis RA, 13-cis RA, at-RA) and the metabolites 13-cis-4-oxo-RA and at-4-oxo-RA were measured in bees fed for 10 days with contaminated syrup. Mixtures of herbicides and cadmium that did not affect bee viability, lowered bee α- and β-carotenoid contents and increased 9-cis-RA as well as 13-cis-4-oxo-RA without modifying the levels of at-retinol. Bee treatment with either glyphosate, a combination of atrazine and cadmium, or mixtures of herbicides promoted lipid peroxidation. Iron was bioconcentrated in bees and led to high levels of lipid peroxidation. Metals also decreased zeaxanthin bee contents. These results show that mixtures of atrazine, glyphosate, cadmium and iron may affect different reactions occurring in the metabolic pathway of vitamin A in the honey bee.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 168, February 2017, Pages 163-170
نویسندگان
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