Insecticide induction of O-demethylase activity and expression of cytochrome P450 genes in the red imported fire ant (Solenopsis invicta Buren)
| Autor: | Bai-zhong Zhang, Hua-tang Wang, Xueyan Shi, Xiwu Gao, Fan-chao Kong, Xin-nian Zeng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Agriculture (General) Plant Science 01 natural sciences Biochemistry chlorpyrifos Red imported fire ant S1-972 Toxicology 03 medical and health sciences chemistry.chemical_compound Food Animals Gene expression P450 activity Gene induction Fipronil fipronil Expressed sequence tag Ecology biology Cytochrome P450 biology.organism_classification 010602 entomology 030104 developmental biology chemistry Solenopsis invicta Chlorpyrifos biology.protein gene expression Animal Science and Zoology PEST analysis Agronomy and Crop Science Food Science |
| Zdroj: | Journal of Integrative Agriculture, Vol 15, Iss 1, Pp 135-144 (2016) |
| ISSN: | 2095-3119 |
| Popis: | The red imported fire ant (Solenopsis invicta) is a global major invasive pest, and has caused significant economic, social and environmental impacts since its invasion to mainland of China in 2004. To date, chemical control has been the most effective measure. However, the long-term use of chemicals would lead to an unexpected rebound. To understand the risks and explore the mechanisms of detoxification or induction to insecticides in S. invicta, the O-demethylase activity and expression of cytochrome P450 genes of workers and queens, and the effects of chlorpyrifos and fipronil exposure in workers were investigated. Biochemical assays showed the O-demethylase activity of cytochrome P450 was significantly higher in workers than in queens (1.66-fold), and was significantly induced in workers exposed to chlorpyrifos and fipronil, reaching a maximum (3.00- and 1.95-fold) at 48 h and then decreasing dramatically compared to controls (exposed to acetone counter-part). The relative expression levels of 12 cytochrome P450 expressed sequence tags (ESTs) in workers were significantly higher than in queens (from 2.3- to 36.4-fold). Multiple cytochrome P450 genes (except 9E4) were co-up-regulated (from 1.5- to 2.86-fold) in workers exposed to fipronil. These results indicated that the increased O-demethylase activity may result from the increased transcription levels of cytochrome P450 related to detoxification of insecticides in S. invicta. It appears that cytochrome P450 plays an important role in enhanced metabolic detoxification of insecticides. At the same time, it also provides the theoretical basis for resistance management and rational usage of insecticides to control S. invicta. |
| Databáze: | OpenAIRE |
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