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Wang YC, Chang YW, Xie HF, Gong WR, Wu CD, Du YZ. The cytochrome P450 gene CYP4g1 driven by high temperature confers abamectin tolerance on Liriomyza trifolii through promoting cuticular hydrocarbons biosynthesis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 203:106012. [PMID: 39084804 DOI: 10.1016/j.pestbp.2024.106012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 06/30/2024] [Accepted: 07/02/2024] [Indexed: 08/02/2024]
Abstract
Liriomyza trifolii, an invasive pest, poses a substantial threat to horticultural and vegetable plants. It spreads rapidly, especially in hot weather, leading to large-scale outbreaks with strong thermotolerance and insecticide resistance. In this study, mortality and LtCYP4g1 expression in L. trifolii were evaluated after thermal and insecticides exposure. Furthermore, functional verification of LtCYP4g1 was conducted through RNA interference and bacterial survival assays in Escherichia coli containing recombinant LtCYP4g1 protein. Results indicated that a short time exposure to high temperature incresed insecticide tolerance of L. trifolii, attributed to decreased mortality and induced LtCYP4g1 expression; LtCYP4g1 was involved in stimulating synthesis of cuticular hydrocarbons (CHCs) and elevating epicuticle lipid content and thickness, and E. coli cells overexpressing LtCYP4g1 exhibited significant tolerance to thermal and insecticide stress. In general, P450-mediated tolerance of L. trifolii was enhanced by high temperature, with LtCYP4g1 playing a role in promoting biosynthesis of CHCs for thickening epidermal lipid barrier and reducing cuticular penetration. This study provides a framework for delving into the function of CYP450s in insecticide detoxification and illustrates the role of global warming in driving the evolution of L. trifolii.
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Affiliation(s)
- Yu-Cheng Wang
- College of Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225000, China
| | - Ya-Wen Chang
- College of Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225000, China
| | - Hong-Fang Xie
- Plant Protection and Quarantine Station of Nanjing City, Nanjing 210029, Jiangsu Province, China
| | - Wei-Rong Gong
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing 210036, China
| | - Cheng-Dong Wu
- Pukou Agricultural Technology Extension Center of Nanjing City, Pukou 211800, China
| | - Yu-Zhou Du
- College of Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225000, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225000, China.
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Zhou M, Zhang C, Wang F, Hao P, Cheng Y. Oxidative stress, DNA damage, and gene expression in earthworms (Eisenia fetida) exposure to ethiprole. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:27679-27688. [PMID: 38517630 DOI: 10.1007/s11356-024-32964-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/13/2024] [Indexed: 03/24/2024]
Abstract
To evaluate the potential ecotoxicity of ethiprole and early warning to earthworms (Eisenia fetida), different concentrations (0 mg·kg-1, 416 mg·kg-1, 625 mg·kg-1, and 1000 mg·kg-1) of ethiprole were added to artificial soil. The key bioindicators were measured and screened at 3 days, 7 days, 14 days, 21 days, and 28 days. The results show that the activity of catalase (CAT) was inhibited for all treatments during the whole exposure period. Besides, the olive tail moment (OTM) value increased gradually as the concentration got higher, which exhibited a dose-time-dependent relationship. Superoxide dismutase (SOD) gene reached the maximum on the 7th day. Mitochondrial large ribosomal RNA (l-rRNA) subunit gene was always in a downregulated state as the concentration increased. Our results show that different concentrations of ethiprole induced certain oxidative stress, DNA damage, and genotoxicity in earthworms. The CAT activity, OTM, and SOD gene could be the most sensitive biomarkers to monitor the toxicity of ethiprole in the soil.
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Affiliation(s)
- Min Zhou
- State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Caixia Zhang
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300384, China
- Gansu Yasheng Potato Group Chemical Limited, Lanzhou, 730030, China
| | - Fuhao Wang
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300384, China
| | - Peipei Hao
- Tianjin Lüheng Chemical Company Limited, Tianjin, 300270, China
| | - Youpu Cheng
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300384, China.
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Yuan X, Li H, Guo X, Jiang H, Zhang Q, Zhang L, Wang G, Li W, Zhao M. Functional roles of two novel P450 genes in the adaptability of Conogethes punctiferalis to three commonly used pesticides. Front Physiol 2023; 14:1186804. [PMID: 37457033 PMCID: PMC10338330 DOI: 10.3389/fphys.2023.1186804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 06/05/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction: Insect cytochrome P450 (CYP450) genes play important roles in the detoxification and metabolism of xenobiotics, such as plant allelochemicals, mycotoxins and pesticides. The polyphagous Conogethes punctiferalis is a serious economic pest of fruit trees and agricultural crops, and it shows high adaptability to different living environments. Methods: The two novel P450 genes CYP6CV1 and CYP6AB51 were identified and characterized. Quantitative real-time PCR (qRT-PCR) technology was used to study the expression patterns of the two target genes in different larval developmental stages and tissues of C. punctiferalis. Furthermore, RNA interference (RNAi) technology was used to study the potential functions of the two P450 genes by treating RNAi-silenced larvae with three commonly used pesticides. Results: The CYP6CV1 and CYP6AB51 genes were expressed throughout various C. punctiferalis larval stages and in different tissues. Their expression levels increased along with larval development, and expression levels of the two target genes in the midgut were significantly higher than in other tissues. The toxicity bioassay results showed that the LC50 values of chlorantraniliprole, emamectin benzoate and lambda-cyhalothrin on C. punctiferalis larvae were 0.2028 μg/g, 0.0683 μg/g and 0.6110 mg/L, respectively. After treating with different concentrations of chlorantraniliprole, emamectin benzoate and lambda-cyhalothrin (LC10, LC30, LC50), independently, the relative expressions of the two genes CYP6CV1 and CYP6AB51 were significantly induced. After the dsRNA injection, the expression profiles of the two CYP genes were reduced 72.91% and 70.94%, respectively, and the mortality rates of the larvae significantly increased when treated with the three insecticides independently at LC10 values. Discussion: In the summary, after interfering with the CYP6CV1 and CYP6AB51 in C. punctiferalis, respectively, the sensitivity of C. punctiferalis to chlorantraniliprole, emamectin benzoate and lambda-cyhalothrin was significantly increased, indicating that the two CYP6 genes were responsible for the adaptability of C. punctiferalis to the three chemical insecticides in C. punctiferalis. The results from this study demonstrated that CYP6CV1 and CYP6AB51 in C. punctiferalis play crucial roles in the detoxification of chlorantraniliprole, emamectin benzoate and lambda-cyhalothrin.
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Affiliation(s)
- Xingxing Yuan
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Han Li
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Xianru Guo
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - He Jiang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Qi Zhang
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Lijuan Zhang
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Gaoping Wang
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Weizheng Li
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Man Zhao
- Henan International Laboratory for Green Pest Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
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Ács A, Komáromy A, Kovács AW, Fodor I, Somogyvári D, Győri J, Farkas A. Temperature related toxicity features of acute acetamiprid and thiacloprid exposure in Daphnia magna and implications on reproductive performance. Comp Biochem Physiol C Toxicol Pharmacol 2023; 268:109601. [PMID: 36906245 DOI: 10.1016/j.cbpc.2023.109601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/18/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023]
Abstract
This study investigated the potential for elevated temperature to alter the toxicity of acetamiprid (ACE) and thiacloprid (Thia) in the ecotoxicity model Daphnia magna. The modulation of CYP450 monooxygenases (ECOD), ABC transporter activity (MXR) and incident cellular reactive oxygen species (ROS) overproduction was screened in premature daphnids following acute (48 h) exposure to sublethal concentrations of ACE and Thia (0.1-, 1.0 μM) at standard 21 °C and elevated 26 °C temperatures. Delayed outcomes of acute exposures were further evaluated based on the reproduction performance of daphnids monitored over 14 days of recovery. Exposures to ACE and Thia at 21o C elicited moderate induction of ECOD activity, pronounced inhibition of MXR activity and severe ROS overproduction in daphnids. In the high thermal regime, treatments resulted in significantly lower induction of ECOD activity and inhibition of MXR activity, suggesting a suppressed metabolism of neonicotinoids and less impaired membrane transport activity in daphnids. Elevated temperature on its own, caused a three-fold rise in ROS levels in control daphnids, while ROS overproduction upon neonicotinoid exposure was less accentuated. Acute exposures to ACE and Thia caused significant decreases also in the reproduction of daphnids, indicating delayed outcomes even at environmentally relevant concentrations. Both the cellular alterations in exposed daphnids and decreases in their reproductive output post exposures evidenced closely similar toxicity patterns and potentials for the two neonicotinoids. While elevated temperature elicited only a shift in baseline cellular alterations evoked by neonicotinoids, it significantly worsened the reproductive performance of daphnids following neonicotinoid exposures.
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Affiliation(s)
- András Ács
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - András Komáromy
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - Attila W Kovács
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - István Fodor
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - Dávid Somogyvári
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - János Győri
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary
| | - Anna Farkas
- Balaton Limnological Research Institute, Eötvös Loránd Research Network, Klebelsberg Kuno u. 3., H-8237 Tihany, Hungary.
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Wen S, Liu C, Wang X, Wang Y, Liu C, Wang J, Xia X. Resistance selection of triflumezopyrim in Laodelphax striatellus (fallén): Resistance risk, cross-resistance and metabolic mechanism. Front Physiol 2022; 13:1048208. [PMID: 36523557 PMCID: PMC9745130 DOI: 10.3389/fphys.2022.1048208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/12/2022] [Indexed: 12/25/2023] Open
Abstract
The risk assessment and resistance mechanisms of insecticide resistance are critical for resistance management strategy before a new insecticide is widely used. Triflumezopyrim (TFM) is the first commercialized mesoionic insecticide, which can inhibit nicotinic acetylcholine receptor with high-performance against the small brown planthopper (SBPH), Laodelphax striatellus (Fallén). In our study, the resistance of SBPH to TFM increased 26.29-fold, and the actual heritability of resistance was 0.09 after 21 generations of continuous selection by TFM. After five generations of constant feeding under insecticide-free conditions from F16 generation, the resistance level decreased 2.05-fold, and the average resistance decline rate per generation was 0.01, but there were no statistical decline. The TFM resistant strains had no cross-resistance to imidacloprid, nitenpyram, thiamethoxam, dinotefuran, flonicamid, pymetrozine, and chlorfenapyr. The third and fifth nymphal stage duration, pre-adult stage, adult preoviposition period, longevity, emergence rate, and hatchability of the resistant strain were significantly lower than those of the susceptible strain, while the female-male ratio was considerably increased. The fitness cost was 0.89. Further, cytochrome P450 monooxygenase (P450) and carboxylesterase (CarE) activities were markedly increased, but only the enzyme inhibitor piperonyl butoxide (PBO) had a significant synergistic effect on the resistant strain. The expression of CYP303A1, CYP4CE2, and CYP419A1v2 of P450 genes was significantly increased. SBPH has a certain risk of resistance to TFM with continuous application. The TFM resistance may be due to the increased activity of P450 enzyme regulated by the overexpression of P450 genes.
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Affiliation(s)
- Shengfang Wen
- College of Plant Protection, Shandong Agricultural University, Taian, China
- College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Chang Liu
- College of Plant Protection, Shandong Agricultural University, Taian, China
| | - Xueting Wang
- College of Plant Protection, Shandong Agricultural University, Taian, China
| | - Youwei Wang
- College of Plant Protection, Shandong Agricultural University, Taian, China
| | - Chao Liu
- College of Plant Protection, Shandong Agricultural University, Taian, China
| | - Jinhua Wang
- College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Xiaoming Xia
- College of Plant Protection, Shandong Agricultural University, Taian, China
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Katsavou E, Riga M, Ioannidis P, King R, Zimmer CT, Vontas J. Functionally characterized arthropod pest and pollinator cytochrome P450s associated with xenobiotic metabolism. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 181:105005. [PMID: 35082029 DOI: 10.1016/j.pestbp.2021.105005] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 11/12/2021] [Accepted: 12/03/2021] [Indexed: 06/14/2023]
Abstract
The cytochrome P450 family (P450s) of arthropods includes diverse enzymes involved in endogenous essential physiological functions and in the oxidative metabolism of xenobiotics, insecticides and plant allelochemicals. P450s can also establish insecticide selectivity in bees and pollinators. Several arthropod P450s, distributed in different phylogenetic groups, have been associated with xenobiotic metabolism, and some of them have been functionally characterized, using different in vitro and in vivo systems. The purpose of this review is to summarize scientific publications on arthropod P450s from major insect and mite agricultural pests, pollinators and Papilio sp, which have been functionally characterized and shown to metabolize xenobiotics and/or their role (direct or indirect) in pesticide toxicity or resistance has been functionally validated. The phylogenetic relationships among these P450s, the functional systems employed for their characterization and their xenobiotic catalytic properties are presented, in a systematic approach, including critical aspects and limitations. The potential of the primary P450-based metabolic pathway of target and non-target organisms for the development of highly selective insecticides and resistance-breaking formulations may help to improve the efficiency and sustainability of pest control.
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Affiliation(s)
- Evangelia Katsavou
- Pesticide Science Laboratory, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Maria Riga
- Institute of Molecular Biology and Biotechnology (IMBB), Foundation for Research and Technology (FORTH), Nikolaou Plastira Street 100, 70013 Heraklion, Crete, Greece.
| | - Panagiotis Ioannidis
- Institute of Molecular Biology and Biotechnology (IMBB), Foundation for Research and Technology (FORTH), Nikolaou Plastira Street 100, 70013 Heraklion, Crete, Greece
| | - Rob King
- Department of Computational and Analytical Sciences, Rothamsted Research, Harpenden, UK
| | - Christoph T Zimmer
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein CH4332, Switzerland
| | - John Vontas
- Pesticide Science Laboratory, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; Institute of Molecular Biology and Biotechnology (IMBB), Foundation for Research and Technology (FORTH), Nikolaou Plastira Street 100, 70013 Heraklion, Crete, Greece.
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Cheng Z, Wang D, Han S, Zuo C, He Y. Transcriptome analysis in the thiamethoxam resistance of seven-spot ladybird beetle, Coccinella septempunctata (Coleoptera: Coccinellidae). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 230:113144. [PMID: 34998260 DOI: 10.1016/j.ecoenv.2021.113144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 12/25/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
The seven-spot ladybird beetle, Coccinella septempunctata Linnaeus (Coleoptera: Coccinellidae) has been used as the main biological control agent against all kinds of aphids in farmland and greenhouse. In this study, a thiamethoxam-resistant strain (ThR) and a susceptible strain (SS) of seven-spot ladybird beetle were established, and differentially expressed genes (DEGs) associated with thiamethoxam resistance were recorded through de novo Illumina HiSeq 4000 sequencing. A total of 53.5 Gb of clean data were obtained and finally assembled into 21,217 unigenes from ThR and SS transcriptomes. 1798 DEGs were identified between the ThR libraries and the SS libraries, including 560 up-regulated genes and 1238 down-regulated genes. Some cytochrome p450 monooxygenases (CYP450s), UDP-glycosyltransferases (UGTs), esterases (ESTs) and ATP-binding cassette (ABC) transporters were observed to be up-regulated and the nicotinic acetylcholine receptors (nAChRs) α subunit gene down-regulated in the ThR strain compared to the SS strain. This study provides genetic information for further studies on thiamethoxam resistance mechanisms in the seven-spot ladybird beetle.
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Affiliation(s)
- Zhi Cheng
- College of Plant Protection, Hebei Agricultural University, Baoding 071000, PR China
| | - Da Wang
- College of Plant Protection, Hebei Agricultural University, Baoding 071000, PR China
| | - Shipeng Han
- College of Plant Protection, Hebei Agricultural University, Baoding 071000, PR China
| | - Cheng Zuo
- College of Plant Protection, Hebei Agricultural University, Baoding 071000, PR China
| | - Yunzhuan He
- College of Plant Protection, Hebei Agricultural University, Baoding 071000, PR China.
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Insecticide Resistance Monitoring in Field Populations of the Whitebacked Planthopper Sogatella furcifera (Horvath) in China, 2019-2020. INSECTS 2021; 12:insects12121078. [PMID: 34940166 PMCID: PMC8706372 DOI: 10.3390/insects12121078] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022]
Abstract
Simple Summary The whitebacked planthopper (WBPH), Sogatella furcifera (Horváth), is one of the most destructive pests that seriously threatens the high-quality and safe production of rice. Overuse of chemical insecticides has led to varying levels of resistance to insecticides in the field population of S. furcifera. In this study, we measured the susceptibility of 18 populations to 10 insecticides by the rice-seedling dip method. Enzyme assays were performed to measure the levels of esterase (EST), glutathione S- transferase (GST) and cytochrome P450 monooxygenase (P450). A risk of cross-resistance between some insecticides were found by pairwise correlation, and EST may be contributed to the resistance to nitenpyram, thiamethoxam and clothianidin in S. furcifera. Overall, our findings will help inform the effective insecticide resistance management strategies to delay the development of insecticide resistance in S. furcifera. Abstract Monitoring is an important component of insecticide resistance management. In this study, resistance monitoring was conducted on 18 field populations in China. The results showed that S. furcifera developed high levels of resistance to chlorpyrifos and buprofezin, and S. furcifera showed low to moderate levels of resistance to imidacloprid, thiamethoxam, dinotefuran, clothianidin, sulfoxaflor, isoprocarb and ethofenprox. Sogatella furcifera remained susceptible or low levels of resistance to nitenpyram. LC50 values of nitenpyram and dinotefuran, imidacloprid, thiamethoxam, clothianidin and chlorpyrifos exhibited significant correlations, as did those between dinotefuran and thiamethoxam, clothianidin, sulfoxaflor, imidacloprid, isoprocarb and buprofezin. Similarly, significant correlations were observed between thiamethoxam and clothianidin, sulfoxaflor and imidacloprid. In addition, the activity of EST in field populations of S. furcifera were significantly correlated with the LC50 values of nitenpyram, thiamethoxam and clothianidin. These results will help inform effective insecticide resistance management strategies to delay the development of insecticide resistance in S. furcifera.
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Nitnavare RB, Bhattacharya J, Singh S, Kour A, Hawkesford MJ, Arora N. Next Generation dsRNA-Based Insect Control: Success So Far and Challenges. FRONTIERS IN PLANT SCIENCE 2021; 12:673576. [PMID: 34733295 PMCID: PMC8558349 DOI: 10.3389/fpls.2021.673576] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 09/22/2021] [Indexed: 06/02/2023]
Abstract
RNA interference (RNAi) is a method of gene silencing where dsRNA is digested into small interfering RNA (siRNA) in the presence of enzymes. These siRNAs then target homologous mRNA sequences aided by the RNA-induced silencing complex (RISC). The mechanism of dsRNA uptake has been well studied and established across many living organisms including insects. In insects, RNAi is a novel and potential tool to develop future pest management means targeting various classes of insects including dipterans, coleopterans, hemipterans, lepidopterans, hymenopterans and isopterans. However, the extent of RNAi in individual class varies due to underlying mechanisms. The present review focuses on three major insect classes viz hemipterans, lepidopterans and coleopterans and the rationale behind this lies in the fact that studies pertaining to RNAi has been extensively performed in these groups. Additionally, these classes harbour major agriculturally important pest species which require due attention. Interestingly, all the three classes exhibit varying levels of RNAi efficiencies with the coleopterans exhibiting maximum response, while hemipterans are relatively inefficient. Lepidopterans on the other hand, show minimum response to RNAi. This has been attributed to many facts and few important being endosomal escape, high activity dsRNA-specific nucleases, and highly alkaline gut environment which renders the dsRNA unstable. Various methods have been established to ensure safe delivery of dsRNA into the biological system of the insect. The most common method for dsRNA administration is supplementing the diet of insects via spraying onto leaves and other commonly eaten parts of the plant. This method is environment-friendly and superior to the hazardous effects of pesticides. Another method involves submergence of root systems in dsRNA solutions and subsequent uptake by the phloem. Additionally, more recent techniques are nanoparticle- and Agrobacterium-mediated delivery systems. However, due to the novelty of these biotechnological methods and recalcitrant nature of certain crops, further optimization is required. This review emphasizes on RNAi developments in agriculturally important insect species and the major hurdles for efficient RNAi in these groups. The review also discusses in detail the development of new techniques to enhance RNAi efficiency using liposomes and nanoparticles, transplastomics, microbial-mediated delivery and chemical methods.
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Affiliation(s)
- Rahul B. Nitnavare
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, United Kingdom
- Department of Plant Science, Rothamsted Research, Harpenden, United Kingdom
| | - Joorie Bhattacharya
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
- Department of Genetics, Osmania University, Hyderabad, India
| | - Satnam Singh
- Punjab Agricultural University (PAU), Regional Research Station, Faridkot, India
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Amardeep Kour
- Punjab Agricultural University (PAU), Regional Research Station, Bathinda, India
| | | | - Naveen Arora
- Department of Genetics and Plant Breeding, Punjab Agricultural University (PAU), Ludhiana, India
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Wang YC, Chang YW, Bai J, Zhang XX, Iqbal J, Lu MX, Gong WR, Du YZ. Temperature affects the tolerance of Liriomyza trifolii to insecticide abamectin. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 218:112307. [PMID: 33965778 DOI: 10.1016/j.ecoenv.2021.112307] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/28/2021] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
The leafminer fly, Liriomyza trifolii, is an invasive pest of horticultural and vegetable crops that possesses a robust competitive ability when compared to congeneric species, especially with respect to temperature and insecticide tolerance. Abamectin, which is commonly used to control L. trifolii in the field, was selected as the target insecticide in this study. Our objective was to study the effect of abamectin and high temperature stress on L. trifolii mortality and the expression of genes encoding cytochrome P450 (CYP450s) and heat shock proteins (Hsps) by quantitative real-time reverse transcriptase PCR (qRT-PCR). When L. trifolii was exposed to abamectin followed by exposure to 40 °C (LC50 +HT40), mortality showed a significant increase, whereas exposure to 40 ℃ followed by abamectin (HT40+LC50) reduced mortality relative to abamectin or HT40 alone. Expression of three CYP450s in the CYP4 family was highest in the HT40+LC50 treatment, followed by the LC50+HT40 treatment. The expression levels of CYP18A1 (CYP18 family) were not significantly different among treatments, and CYP301A1 (CYP301 family) was only sensitive to temperature (HT40). The expression of five sHsps showed similar expression patterns and were highly responsive to the LC50+HT40 treatment, followed by the HT40 and HT40+LC50 treatments. Based on CYP450s and Hsps expression levels, our findings that suggest that L. trifolii exhibits adaptive cross-tolerance to high temperature and abamectin. This study provides a framework for selecting the most effective application time for abamectin with respect to controlling L. trifolii, which will ultimately reduce the overuse of pesticides.
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Affiliation(s)
- Yu-Cheng Wang
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Ya-Wen Chang
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Jing Bai
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Xiao-Xiang Zhang
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Junaid Iqbal
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Ming-Xing Lu
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Wei-Rong Gong
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing, China
| | - Yu-Zhou Du
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, China.
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11
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Wang YC, Chang YW, Bai J, Zhang XX, Iqbal J, Lu MX, Hu J, Du YZ. High temperature stress induces expression of CYP450 genes and contributes to insecticide tolerance in Liriomyza trifolii. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 174:104826. [PMID: 33838719 DOI: 10.1016/j.pestbp.2021.104826] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/28/2021] [Accepted: 03/07/2021] [Indexed: 06/12/2023]
Abstract
Liriomyza trifolii is an invasive leafminer fly that inflicts damage on many horticultural and vegetable crops. In this study, the effects of elevated temperatures on L. trifolii tolerance to insecticides abamectin (AB), monosultap (MO) and a mixture of abamectin and monosultap (AM) were firstly investigated, then five CYP450 genes (LtCYPs) were cloned, and expression patterns and NADPH cytochrome C reductase (NCR) activity in L. trifolii were compared in response to high temperature stress and insecticide exposure. Results showed elevated temperatures induced expression of LtCYP450s, the expression level of LtCYP4g1, LtCYP4g15 and LtCYP301A1 after exposed to different high temperature were significantly up-regulated compared with the control (25 °C), while there was no significant difference in LtCYP4E21 and LtCYP18A1. Under the joint high temperature and insecticide stress, the expression of LtCYP4g15, LtCYP18A1 and LtCYP301A1 was significantly higher under elevated temperatures than that of only under AB exposure. For MO and AM exposure, only 40 °C could induce the expression of LtCYP4g15, LtCYP18A1 and LtCYP301A1. In general, the LtCYPs expression pattern was correlated with increased NCR activity and decreased mortality in response to insecticide exposure under elevated temperatures. These all demonstrated that insecticide tolerance in L. trifolii could be mediated by high temperature. This study improves our understanding of L. trifolii physiology and offers a theoretical context for improved control that ultimately reduces the abuse of insecticides and decreases exposure to non-target organisms.
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Affiliation(s)
- Yu-Cheng Wang
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Ya-Wen Chang
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Jing Bai
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Xiao-Xiang Zhang
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Junaid Iqbal
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Ming-Xing Lu
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China
| | - Jie Hu
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing, China
| | - Yu-Zhou Du
- College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, China.
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12
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Jin JX, Ye ZC, Jin DC, Li FL, Li WH, Cheng Y, Zhou YH. Changes in Transcriptome and Gene Expression in Sogatella furcifera (Hemiptera: Delphacidae) in Response to Cycloxaprid. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:284-297. [PMID: 33151323 DOI: 10.1093/jee/toaa238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 06/11/2023]
Abstract
The white-backed planthopper, Sogatella furcifera (Horváth), causes substantial damage to crops by direct feeding or virus transmission, especially southern rice black-streaked dwarf virus, which poses a serious threat to rice production. Cycloxaprid, a novel cis-nitromethylene neonicotinoid insecticide, has high efficacy against rice planthoppers, including imidacloprid-resistant populations. However, information about the influence of cycloxaprid on S. furcifera (Hemiptera: Delphacidae) at the molecular level is limited. Here, by de novo transcriptome sequencing and assembly, we constructed two transcriptomes of S. furcifera and profiled the changes in gene expression in response to cycloxaprid at the transcription level. We identified 157,906,456 nucleotides and 131,601 unigenes using the Illumina technology from cycloxaprid-treated and untreated S. furcifera. In total, 38,534 unigenes matched known proteins in at least one database, accounting for 29.28% of the total unigenes. The number of coding DNA sequences was 28,546 and that of amino acid sequences in the coding region was 22,299. In total, 15,868 simple sequence repeats (SSRs) were identified. The trinucleotide repeats accounted for 45.1% (7,157) of the total SSRs and (AAG/CTT)n were the most frequent motif. There were 359 differentially expressed genes that might have been induced by cycloxaprid. There were 131 upregulated and 228 downregulated genes. Twenty-two unigenes might be involved in resistance against cycloxaprid, such as cytochrome P450, glutathione S-transferase (GST), acid phosphatase (ACP), and cadherin. Our study provides vital information on cycloxaprid-induced resistance mechanisms, which will be useful to analyze the molecular mechanisms of cycloxaprid resistance and may lead to the development of novel strategies to manage S. furcifera.
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Affiliation(s)
- Jian-Xue Jin
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, P.R. China
| | - Zhao-Chun Ye
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, P.R. China
| | - Dao-Chao Jin
- The Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Institute of Entomology, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Feng-Liang Li
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, P.R. China
| | - Wen-Hong Li
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, P.R. China
| | - Ying Cheng
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, P.R. China
| | - Yu-Hang Zhou
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, P.R. China
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Elzaki MEA, Li ZF, Wang J, Xu L, Liu N, Zeng RS, Song YY. Activiation of the nitric oxide cycle by citrulline and arginine restores susceptibility of resistant brown planthoppers to the insecticide imidacloprid. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122755. [PMID: 32361135 DOI: 10.1016/j.jhazmat.2020.122755] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/18/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Pest management, which is critical for global crop productivity, is hampered by rapidly evolving insecticide resistance in insect pests. The ability to manage the development of insecticide resistance is thus vital. Nitric oxide (NO) is a ubiquitous signaling molecule with important functions in a variety of biological processes. Here we show that imidacloprid-resistant brown planthoppers (BPH) are deficient in citrulline and arginine, both of which are involved in NO production, but exogenous citrulline and arginine render resistant BPH vulnerable to imidacloprid. BPH insecticide resistance results from low NO production; exogenous arginine and citrulline augment the NO signaling in BPH, leading to downregulation of CYP6AY1 and CYP6ER1, the cytochrome P450 s that contribute to imidacloprid detoxification, thereby restoring susceptibility. Two amino acids that can be used to restore susceptibility in insecticide-resistant insects are identified, establishing a novel metabolome-based approach for killing insecticide-resistant pests and providing a useful template for managing insecticide resistance.
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Affiliation(s)
- Mohammed Esmail Abdalla Elzaki
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhen-Fang Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Institute of Crop Resistance and Chemical Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jie Wang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Institute of Crop Resistance and Chemical Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Lu Xu
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Nannan Liu
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, 36849, USA
| | - Ren-Sen Zeng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Institute of Crop Resistance and Chemical Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yuan-Yuan Song
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Institute of Crop Resistance and Chemical Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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14
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Wang C, Xu X, Huang Y, Yu H, Li H, Wan Q, Pan B. Transcription profiling and characterization of Dermanyssus gallinae cytochrome P450 genes involved in beta-cypermethrin resistance. Vet Parasitol 2020; 283:109155. [PMID: 32534384 DOI: 10.1016/j.vetpar.2020.109155] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 01/29/2023]
Abstract
The poultry red mite, Dermanyssus gallinae, poses a significant threat to hen health and poultry husbandry. D. gallinae has typically been controlled using synthetic acaricides, like pyrethroids, but increased resistance to pyrethroids has been found in poultry red mite populations worldwide. Pyrethroids resistance in arthropods has been associated to cytochrome P450 monooxygenases (P450s), a main member of a group of detoxification enzymes. To explore the potential contribution of P450s to the resistance to pyrethroids in D. gallinae, we first identified and then characterized four P450s genes. Phylogenetic analysis revealed that the four P450s genes in D. gallinae belong to three different clades, with two in the CYP-6, one in the CYP-4 and one in the CYP-2. All four P450s genes were expressed in a similar pattern in D. gallinae at different stages of development, and showed high expression in the adult stage, indicating that they played a role in mite development. Simultaneously, constitutive over-expression of Deg-CYP-3, a clade associated with pesticide metabolism, was detected in a resistant strain (RS) compared with a susceptible strain (SS). When exposed to beta-cypermethrin, the four P450s gene transcripts in the RS strain increased in a time-dependent manner. In particular, Deg-CYP-3 expression increased 5-fold compared to gene expression in control group at 12 h, although the four P450s genes were not induced in the SS strain. Our results show the first insights into the molecular characteristics of P450s genes in D. gallinae. The elevated presence of P450s genes in the RS strain, indicated by their constitutive over-expression and their inducible expression, suggests that they confer resistance to beta-cypermethrin, and are involved in its detoxification.
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Affiliation(s)
- Chuanwen Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xiaolin Xu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yu Huang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - He Yu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Hao Li
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Qiang Wan
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Baoliang Pan
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
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15
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Bai-Zhong Z, Xu S, Cong-Ai Z, Liu-Yang L, Ya-She L, Xing G, Dong-Mei C, Zhang P, MIng-Wang S, Xi-Ling C. Silencing of Cytochrome P450 in Spodoptera frugiperda (Lepidoptera: Noctuidae) by RNA Interference Enhances Susceptibility to Chlorantraniliprole. JOURNAL OF INSECT SCIENCE (ONLINE) 2020; 20:5850352. [PMID: 32484869 PMCID: PMC7266073 DOI: 10.1093/jisesa/ieaa047] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Indexed: 05/27/2023]
Abstract
Fall armyworm, Spodoptera frugiperda (Smith), has caused significant losses for crop production in China. The fall armyworm is mainly controlled by the chemical insecticides, whereas the frequent application of insecticides would result in the resistance development. Insect cytochrome P450 monooxygenases play an essential part in the detoxification of insecticides. In this study, five P450 genes were selected to determine the role in response to insecticides by RNA interference (RNAi). Developmental expression pattern analysis revealed that S. frugiperda CYP321A8, CYP321A9, and CYP321B1 were highest in second-instar larvae among developmental stages, with 2.04-, 3.39-, and 8.58-fold compared with eggs, whereas CYP337B5 and CYP6AE44 were highest in adult stage, with 16.3- and 10.6-fold in comparison of eggs, respectively. Tissue-specific expression pattern analysis exhibited that CYP321A8, CYP321B1, and CYP6AE44 were highest in the midguts, with 3.56-, 3.33-, and 3.04-fold compared with heads, whereas CYP321A9 and CYP337B5 were highest in wings, with 3.07- and 3.36-fold compared with heads, respectively. RNAi was also conducted to explore detoxification effects of the five P450 genes on chlorantraniliprole. The second-instar larvae became more sensitive to chlorantraniliprole with a higher mortality rate than the control, after silencing CYP321A8, CYP321A9, and CYP321B1, respectively. These findings strongly supported our viewpoint that CYP321A8, CYP321A9, and CYP321B1 may play a critical role in insecticide detoxification. It will provide a basis for further study on regulation of P450 genes and the management of S. frugiperda.
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Affiliation(s)
- Zhang Bai-Zhong
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Su Xu
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Zhen Cong-Ai
- Department of Entomology, China Agricultural University, Beijing, P.R. China
| | - Lu Liu-Yang
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Li Ya-She
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Ge Xing
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Chen Dong-Mei
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Pei Zhang
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Shi MIng-Wang
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
| | - Chen Xi-Ling
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, Henan Province, P.R. China
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16
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Castro Janer E, Klafke GM, Fontes F, Capurro ML, Schumaker TSS. Mutations in Rhipicephalus microplus GABA gated chloride channel gene associated with fipronil resistance. Ticks Tick Borne Dis 2019; 10:761-765. [PMID: 30898542 DOI: 10.1016/j.ttbdis.2019.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 02/18/2019] [Accepted: 03/13/2019] [Indexed: 11/28/2022]
Abstract
The tropical cattle tick, Rhipicephalus microplus, is one of the most damaging parasites that affects cattle in tropical and subtropical regions in the world. Tick resistance to acaricides is dispersed worldwide and a number of associated mutations in target site genes have been described. Phenylpyrazole (e.g. fipronil) and cyclodiene (e.g. lindane, dieldrin) insecticides both have the same mode of action blocking the GABA-gated chloride channel encoded by the GABA-Cl gene. A conserved mutation, rdl (resistance to dieldrin) is found across a number of arthropods resistant to cyclodienes and phenylpyrazoles. In ticks, the mutation T290 L, was identified in the second transmembrane (TM2) domain of the GABA-gated chloride channel of Australian cattle tick populations that are resistant to dieldrin. Recently, cross-resistance between fipronil and lindane was reported in R. microplus populations obtained from Uruguay and Brazil. The objective of the present study was to identify mutations in the GABA-Cl gene associated with fipronil resistance. Genomic DNA was obtained from engorged females from fipronil-susceptible and resistant populations sampled from Uruguay and Brazil (n = 166). Initially, it was searched the T290 L mutation described in Australia; however, this mutation was not detected in individuals from resistant populations from either country. The sequencing of a fragment of the GABA-Cl gene revealed nucleotide polymorphisms in fipronil- and lindane-resistant ticks in two populations from Uruguay and five from Brazil. Five amino acid substitutions were present in the resistant strains. Two different substitutions were found in an alanine residue (A286S and A286 L) that is homolog to rdl mutations in fipronil-resistant individuals of other arthropod species. Four other amino acid substitutions (S281 T, V317I, T328 A and A329S) were present in some resistant strains, always with the mutation A286S. This is the first documentation of mutations in the GABA-Cl gene associated with fipronil-resistant in R. microplus.
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Affiliation(s)
- E Castro Janer
- Department of Veterinary Parasitology, School of Veterinary, UDELAR. Av. Lasplaces 1620, CP 11600, Montevideo, Uruguay.
| | - G M Klafke
- Instituto de Pesquisas Veterinárias Desidério Finamor, Governo do Estado do Rio Grande do Sul, Estrada do Conde 6000, Eldorado do Sul, RS, Brazil
| | - F Fontes
- Department of Veterinary Parasitology, School of Veterinary, UDELAR. Av. Lasplaces 1620, CP 11600, Montevideo, Uruguay
| | - M L Capurro
- Department of Parasitology, Instituto de Ciências Biomédicas-USP, Av. Prof. Lineu Prestes 1374, Cidade Universitária, CEP. 05508-000, São Paulo, SP, Brazil
| | - T S S Schumaker
- Department of Parasitology, Instituto de Ciências Biomédicas-USP, Av. Prof. Lineu Prestes 1374, Cidade Universitária, CEP. 05508-000, São Paulo, SP, Brazil
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17
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Sheng CW, Casida JE, Durkin KA, Chen F, Han ZJ, Zhao CQ. Fiprole insecticide resistance of Laodelphax striatellus: electrophysiological and molecular docking characterization of A2'N RDL GABA receptors. PEST MANAGEMENT SCIENCE 2018; 74:2645-2651. [PMID: 29718557 DOI: 10.1002/ps.5059] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/20/2018] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Phenylpyrazole (fiprole) insecticides, including ethiprole, fipronil and flufiprole with excellent activity on rice planthoppers, are very important in Asia but resistance has developed after decades of use. The molecular mechanism of fipronil- but not ethiprole-resistance has been previously studied in rice planthoppers. In our laboratory, a small brown planthopper Laodelphax striatellus strain with ethiprole-resistance was cultured and the molecular mechanisms of ethiprole resistance and of cross-resistance among fiprole insecticides were investigated. RESULTS Ethiprole-resistant L. striatellus has >5000-fold resistance compared to the susceptible strain, and exhibits around 200-fold cross-resistance with fipronil and flufiprole. RDL genes were isolated from susceptible and ethiprole-resistant L. striatellus and expressed in Xenopus oocytes. Electrophysiological studies showed fiprole insecticides inhibited γ-aminobutyric acid (GABA)-induced current with IC50 = 0.1-1.4 μM to LsRDL-S homomers. In LsRDL-R with A2'N mutation, only 1-13% inhibition was observed on treatment with 10 μM ethiprole, fipronil or flufiprole. Homology models indicate A2'N mutation allows crosslinking hydrogen bonding between Asn sidechains at the 2' position around the channel pore, blocking insecticides from interacting near this position. In contrast, insecticides showed favorable binding near A2' in wild-type L. striatellus. CONCLUSION Cross-resistance is increasing for fiprole insecticides in L. striatellus and management strategies are necessary to minimize resistance. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Cheng-Wang Sheng
- Key Laboratory of Integrated Pest Management in Crops in Eastern China (Ministry of Agriculture of China), College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - John E Casida
- Environmental Chemistry and Toxicology Laboratory, Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, USA
| | - Kathleen A Durkin
- Molecular Graphics and Computation Facility, College of Chemistry, University of California, Berkeley, CA, USA
| | - Feng Chen
- Key Laboratory of Integrated Pest Management in Crops in Eastern China (Ministry of Agriculture of China), College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Zhao-Jun Han
- Key Laboratory of Integrated Pest Management in Crops in Eastern China (Ministry of Agriculture of China), College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Chun-Qing Zhao
- Key Laboratory of Integrated Pest Management in Crops in Eastern China (Ministry of Agriculture of China), College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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18
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Huang HJ, Cui JR, Guo Y, Sun JT, Hong XY. Roles of LsCYP4DE1 in wheat adaptation and ethiprole tolerance in Laodelphax striatellus. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2018; 101:14-23. [PMID: 30075238 DOI: 10.1016/j.ibmb.2018.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/18/2018] [Accepted: 07/29/2018] [Indexed: 06/08/2023]
Abstract
The cytochrome P450 monooxygenase (P450) gene family has an important role in detoxifying host plant allelochemicals and pesticides. In this study, we screened differentially expressed genes of the small brown planthopper (Laodelphax striatellus, SBPHs) that were reared for more than ten generations on rice and wheat plants, and found that only a few P450s were associated with host adaptation. LsCYP4DE1, whose expression was 9.5-fold higher in the wheat-adapted SBPH (wSBPH) than in the rice-adapted SBPH (rSBPH), appeared to have an important role in the colonization of wheat plants. Knocking down the expression of LsCYP4DE1 led to increased mortality, as well as decreased performance of SBPHs reared on wheat. However, no significant difference was found in dsLsCYP4DE1-treated SBPHs on rice plants. In addition, LsCYP4DE1 was potentially associated with pesticide tolerance, and suppression of its expression led to increased sensitivity to the pesticide ethiprole. Our results revealed potential roles of LsCYP4DE1 in wheat adaptation and ethiprole tolerance, and provide useful information for pest management.
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Affiliation(s)
- Hai-Jian Huang
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Jia-Rong Cui
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Yan Guo
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Jing-Tao Sun
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Xiao-Yue Hong
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China.
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19
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Pan Y, Chai P, Zheng C, Xu H, Wu Y, Gao X, Xi J, Shang Q. Contribution of cytochrome P450 monooxygenase CYP380C6 to spirotetramat resistance in Aphis gossypii Glover. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 148:182-189. [PMID: 29891371 DOI: 10.1016/j.pestbp.2018.04.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/16/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
The cytochrome P450 monooxygenases play a key role in detoxification mechanism for spirotetramat resistance in Aphis gossypii Glover. However, only one P450 genes (CYP6DA2), among thirty-five P450 genes identified from Aphis gossypii transcriptome database, has been reported to play important role in spirotetramat resistance in previous resistance level until now. In this study, after the confirmation of the rise of resistance level and important roles of P450s in spirotetramat resistance by the synergism analysis, the gene expression changes were determined for P450 genes in spirotetramat susceptible and resistant strains. Compared with the susceptible strain, CYP6CY4, CYP6CY14, CYP6CY18 and CYP6DC1 in CYP3 Clade were up-regulated in resistant nymphs, with the CYP6CY14, CYP6CY4, CYP6DC1, and CYP6CY18 increased to 2.54-, 1.51-, 1.31- and 1.29-fold, respectively. Eight genes in CYP3 Clade, three genes in CYP4 Clade and one gene in Mito Clade were down-regulated. In resistant adult aphids, CYP380C6 in CYP4 Clade, CYP353B1 in CYP2 Clade, and CYP307A1 in Mito Clade were up-regulated under spirotetramat stress, with the CYP380C6, CYP353B1 and CYP307A1 increased to 2.89-, 1.91-, and 1.38-fold, respectively. In contrast, the other P450 genes were almost down-regulated, especially these P450 genes in CYP3 Clade, CYP4 Clade and Mito Clade. RNA interference of CYP380C6 significantly increased the sensitivity of the resistant adults and nymphs to spirotetramat, while suppression of CYP6CY14 could not increase the toxicity of spirotetramat. These results indicate the possible involvement of the CYP380C6 genes in spirotetramat resistance at present very high resistance levels. Screening the expression changes of P450 genes under different spirotetramat resistance levels in the genome-scale will provide an overall view on the possible metabolic factors in the resistance development. The results may facilitate further work to validate the roles of P450 in spirotetramat resistance with heterologous expression.
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Affiliation(s)
- Yiou Pan
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Pujin Chai
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Chao Zheng
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Hongfei Xu
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Yongqiang Wu
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing 100193, PR China
| | - Jinghui Xi
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Qingli Shang
- College of Plant Science, Jilin University, Changchun 130062, PR China.
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Identification and Functional Analysis of a Novel Cytochrome P450 Gene CYP9A105 Associated with Pyrethroid Detoxification in Spodoptera exigua Hübner. Int J Mol Sci 2018; 19:ijms19030737. [PMID: 29510578 PMCID: PMC5877598 DOI: 10.3390/ijms19030737] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/22/2018] [Accepted: 03/02/2018] [Indexed: 01/26/2023] Open
Abstract
In insects, cytochrome P450 monooxygenases (P450s or CYPs) are known to be involved in the detoxification and metabolism of insecticides, leading to increased resistance in insect populations. Spodoptera exigua is a serious polyphagous insect pest worldwide and has developed resistance to various insecticides. In this study, a novel CYP3 clan P450 gene CYP9A105 was identified and characterized from S. exigua. The cDNAs of CYP9A105 encoded 530 amino acid proteins, respectively. Quantitative real-time PCR analyses showed that CYP9A105 was expressed at all developmental stages, with maximal expression observed in fifth instar stage larvae, and in dissected fifth instar larvae the highest transcript levels were found in midguts and fat bodies. The expression of CYP9A105 in midguts was upregulated by treatments with the insecticides α-cypermethrin, deltamethrin and fenvalerate at both LC15 concentrations (0.10, 0.20 and 5.0 mg/L, respectively) and LC50 concentrations (0.25, 0.40 and 10.00 mg/L, respectively). RNA interference (RNAi) mediated silencing of CYP9A105 led to increased mortalities of insecticide-treated 4th instar S. exigua larvae. Our results suggest that CYP9A105 might play an important role in α-cypermethrin, deltamethrin and fenvalerate detoxification in S. exigua.
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Elzaki MEA, Miah MA, Han Z. Buprofezin Is Metabolized by CYP353D1v2, a Cytochrome P450 Associated with Imidacloprid Resistance in Laodelphax striatellus. Int J Mol Sci 2017; 18:ijms18122564. [PMID: 29186030 PMCID: PMC5751167 DOI: 10.3390/ijms18122564] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/14/2017] [Accepted: 11/20/2017] [Indexed: 11/16/2022] Open
Abstract
CYP353D1v2 is a cytochrome P450 related to imidacloprid resistance in Laodelphax striatellus. This work was conducted to examine the ability of CYP353D1v2 to metabolize other insecticides. Carbon monoxide difference spectra analysis indicates that CYP353D1v2 was successfully expressed in insect cell Sf9. The catalytic activity of CYP353D1v2 relating to degrading buprofezin, chlorpyrifos, and deltamethrin was tested by measuring substrate depletion and analyzing the formation of metabolites. The results showed the nicotinamide-adenine dinucleotide phosphate (NADPH)-dependent depletion of buprofezin (eluting at 8.7 min) and parallel formation of an unknown metabolite (eluting 9.5 min). However, CYP353D1v2 is unable to metabolize deltamethrin and chlorpyrifos. The recombinant CYP353D1v2 protein efficiently catalyzed the model substrate p-nitroanisole with a maximum velocity of 9.24 nmol/min/mg of protein and a Michaelis constant of Km = 6.21 µM. In addition, imidacloprid was metabolized in vitro by the recombinant CYP353D1v2 microsomes (catalytic constant Kcat) 0.064 pmol/min/pmol P450, Km = 6.41 µM. The mass spectrum of UPLC-MS analysis shows that the metabolite was a product of buprofezin, which was buprofezin sulfone. This result provided direct evidence that L. striatellus cytochrome P450 CYP353D1v2 is capable of metabolizing imidacloprid and buprofezin.
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Affiliation(s)
- Mohammed Esmail Abdalla Elzaki
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Department of Entomology, College of Plant Protection, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
- College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Mohammad Asaduzzaman Miah
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Department of Entomology, College of Plant Protection, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
| | - Zhaojun Han
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Department of Entomology, College of Plant Protection, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
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Garrood WT, Zimmer CT, Gutbrod O, Lüke B, Williamson MS, Bass C, Nauen R, Emyr Davies TG. Influence of the RDL A301S mutation in the brown planthopper Nilaparvata lugens on the activity of phenylpyrazole insecticides. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 142:1-8. [PMID: 29107231 PMCID: PMC5672059 DOI: 10.1016/j.pestbp.2017.01.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 12/18/2016] [Accepted: 01/04/2017] [Indexed: 06/07/2023]
Abstract
We discovered the A301S mutation in the RDL GABA-gated chloride channel of fiprole resistant rice brown planthopper, Nilaparvata lugens populations by DNA sequencing and SNP calling via RNASeq. Ethiprole selection of two field N. lugens populations resulted in strong resistance to both ethiprole and fipronil and resulted in fixation of the A301S mutation, as well as the emergence of another mutation, Q359E in one of the selected strains. To analyse the roles of these mutations in resistance to phenylpyrazoles, three Rdl constructs: wild type, A301S and A301S+Q359E were expressed in Xenopus laevis oocytes and assessed for their sensitivity to ethiprole and fipronil using two-electrode voltage-clamp electrophysiology. Neither of the mutant Rdl subtypes significantly reduced the antagonistic action of fipronil, however there was a significant reduction in response to ethiprole in the two mutated subtypes compared with the wild type. Bioassays with a Drosophila melanogaster strain carrying the A301S mutation showed strong resistance to ethiprole but not fipronil compared to a strain without this mutation, thus further supporting a causal role for the A301S mutation in resistance to ethiprole. Homology modelling of the N. lugens RDL channel did not suggest implications of Q359E for fiprole binding in contrast to A301S located in transmembrane domain M2 forming the channel pore. Synergist bioassays provided no evidence of a role for cytochrome P450s in N. lugens resistance to fipronil and the molecular basis of resistance to this compound remains unknown. In summary this study provides strong evidence that target-site resistance underlies widespread ethiprole resistance in N. lugens populations.
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Affiliation(s)
- William T Garrood
- Biological Chemistry and Crop Protection Department, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - Christoph T Zimmer
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK
| | - Oliver Gutbrod
- Bayer CropScience AG, R&D, Research Technologies, Monheim, Germany
| | - Bettina Lüke
- Bayer CropScience AG, R&D, Pest Control Biology, Monheim, Germany
| | - Martin S Williamson
- Biological Chemistry and Crop Protection Department, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - Chris Bass
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK
| | - Ralf Nauen
- Bayer CropScience AG, R&D, Pest Control Biology, Monheim, Germany
| | - T G Emyr Davies
- Biological Chemistry and Crop Protection Department, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
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Wei Q, Mu XC, Wu SF, Wang LX, Gao CF. Cross-resistance to three phenylpyrazole insecticides and A2'N mutation detection of GABA receptor subunit in fipronil-resistant Laodelphax striatellus (Hemiptera: Delphacidae). PEST MANAGEMENT SCIENCE 2017; 73:1618-1624. [PMID: 27943653 DOI: 10.1002/ps.4498] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 11/29/2016] [Accepted: 12/01/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Laodelphax striatellus (Fallén) is an important pest of crops in East Asia. Over the past decade, phenylpyrazole insecticides, which target the insect GABA receptor, have increasingly been used as alternatives against rice planthoppers. RESULTS Cross-resistance to ethiprole and butene-fipronil was detected in a laboratory-selected fipronil-resistant strain of L. striatellus (LsFR). Compared with a fipronil-susceptible strain (LsFS), LsFR had obtained a high-level resistance to fipronil (112.1-fold) and moderate resistance to ethiprole (24.5-fold) and butene-fipronil (14.7-fold). For the resistance of field populations, LC50 values of ethiprole were remarkably higher than the other two analogues in Gaochun and Yancheng populations in 2016. Significant correlations were demonstrated between the LC50 values of three phenylpyrazole insecticides (R = 0.944-0.998, P = 0.007-0.016). Additionally, an AS-PCR assay was developed to detect the A2'N mutant GABA receptor in L. striatellus strains or populations. It was noteworthy that mutation frequencies of 19.2 and 3.6% appeared in Lujiang and Gaochun populations in 2016, respectively. Furthermore, there was an extremely significant difference in genomic expression of Lsrdl between the LsFS and LsFR individuals (1.85-fold, F = 26.8, P = 0.0008). CONCLUSIONS This study could help us better understand the cross-resistance mechanisms in L. striatellus, and be beneficial for proposing effective pest management strategies of phenylpyrazole resistance. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Qi Wei
- Department of Pesticide Sciences, College of Plant Protection, Nanjing Agricultural University, State and Local Joint Engineering Research Centre of Green Pesticide Invention and Application, Nanjing, China
| | - Xi-Chao Mu
- Department of Pesticide Sciences, College of Plant Protection, Nanjing Agricultural University, State and Local Joint Engineering Research Centre of Green Pesticide Invention and Application, Nanjing, China
| | - Shun-Fan Wu
- Department of Pesticide Sciences, College of Plant Protection, Nanjing Agricultural University, State and Local Joint Engineering Research Centre of Green Pesticide Invention and Application, Nanjing, China
| | - Li-Xiang Wang
- Department of Pesticide Sciences, College of Plant Protection, Nanjing Agricultural University, State and Local Joint Engineering Research Centre of Green Pesticide Invention and Application, Nanjing, China
| | - Cong-Fen Gao
- Department of Pesticide Sciences, College of Plant Protection, Nanjing Agricultural University, State and Local Joint Engineering Research Centre of Green Pesticide Invention and Application, Nanjing, China
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Sun H, Pu J, Chen F, Wang J, Han Z. Multiple ATP-binding cassette transporters are involved in insecticide resistance in the small brown planthopper, Laodelphax striatellus. INSECT MOLECULAR BIOLOGY 2017; 26:343-355. [PMID: 28299835 DOI: 10.1111/imb.12299] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
ATP-binding cassette (ABC) transporters are membrane-bound proteins involved in the movement of various substrates, including drugs and insecticides, across the lipid membrane. Demonstration of the role of human ABC transporters in multidrug resistance has led to speculation that they might be an important mechanism controlling the fate of insecticides in insects. However, the role of ABC transporters in insects remains largely unknown. The small brown planthopper, Laodelphax striatellus Fallén, has developed resistance to most of the insecticides used for its control. Our goals were to identify the ABC transporters in La. striatellus and to examine their involvement in resistance mechanisms, using related strains resistant to chlorpyrifos, deltamethrin and imidacloprid, compared with the susceptible strain. Based on the transcriptome of La. striatellus, 40 full-length ABC transporters belonging to the ABCA-ABCH subfamilies were identified. Quantitative PCR revealed that over 20% of genes were significantly up-regulated in different resistant strains, and eight genes from the ABCB/C/D/G subfamilies were up-regulated in all three resistant strains, compared with the susceptible strain. Furthermore, synergism studies showed verapamil significantly enhanced insecticide toxicity in various resistant strains but not in the susceptible strain. These results suggest that ABC transporters might be involved in resistance to multiple insecticides in La. striatellus.
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Affiliation(s)
- H Sun
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - J Pu
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - F Chen
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - J Wang
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Z Han
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu, China
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Shi L, Zhang J, Shen G, Xu Z, Xu Q, He L. Collaborative contribution of six cytochrome P450 monooxygenase genes to fenpropathrin resistance in Tetranychus cinnabarinus (Boisduval). INSECT MOLECULAR BIOLOGY 2016; 25:653-665. [PMID: 27351452 DOI: 10.1111/imb.12251] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cytochrome P450 monooxygenases (P450s), as an important family of detoxification enzymes, participate in the metabolism of agrochemicals in almost all agricultural pests and play important roles in the development of insecticide resistance. Two P450 genes (CYP389B1 and CYP392A26) were identified and their expression patterns were investigated in our previous study. In this study, four more P450 gene sequences (CYP391A1, CYP384A1, CYP392D11 and CYP392A28) from the Clan 2, Clan 3 and Clan 4 families were identified and characterized. Quantitative PCR analysis showed that these four P450 genes were highly expressed in a fenpropathrin-resistant (FeR) strain of Tetranychus cinnabarinus. In addition, their expressions were much more sensitive to fenpropathrin induction in the FeR strain than the susceptible strain. Gene-silencing experiments via double-stranded RNA feeding were carried out. The results showed that mRNA levels of these six P450 genes were reduced in the FeR strain and the activities of P450s were decreased. Consequently mite susceptibilities to fenpropathrin were increased. Interestingly, silencing all six P450 genes simultaneously had an even greater effect on resistance than silencing them individually. This study increases our understanding of the molecular mechanisms of insecticide detoxification, suggesting that the overexpression of these six P450 genes might play important roles in fenpropathrin resistance in T. cinnabarinus collaboratively.
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Affiliation(s)
- L Shi
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - J Zhang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - G Shen
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Z Xu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Q Xu
- Department of Biology, Abilene Christian University, Abilene, TX, USA
| | - L He
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
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26
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Zhang X, Liao X, Mao K, Zhang K, Wan H, Li J. Insecticide resistance monitoring and correlation analysis of insecticides in field populations of the brown planthopper Nilaparvata lugens (stål) in China 2012-2014. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2016; 132:13-20. [PMID: 27521908 DOI: 10.1016/j.pestbp.2015.10.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/27/2015] [Accepted: 10/05/2015] [Indexed: 06/06/2023]
Abstract
The brown planthopper is a serious rice pest in China. Chemical insecticides have been considered a satisfactory means of controlling the brown planthopper. In the present study, we determined the susceptibility of twenty-one populations of Nilaparvata lugens to eleven insecticides by a rice-stem dipping method from 2012 to 2014 in eight provinces of China. These field-collected populations of N. lugens had developed high levels of resistance to imidacloprid (resistant ratio, RR=233.3-2029-fold) and buprofezin (RR=147.0-1222). Furthermore, N. lugens showed moderate to high levels of resistance to thiamethoxam (RR=25.9-159.2) and low to moderate levels of resistance to dinotefuran (RR=6.4-29.1), clothianidin (RR=6.1-33.6), ethiprole (RR=11.5-71.8), isoprocarb (RR=17.1-70.2), and chlorpyrifos (RR=7.4-30.7). In contrast, the susceptibility of N. lugens to etofenprox (RR=1.1-4.9), thiacloprid (RR=2.9-8.2) and acetamiprid (RR=2.7-26.2) remained susceptible to moderate levels of resistance. Significant correlations were detected between the LC50 values of imidacloprid and thiamethoxam, dinotefuran, buprofezin, and etofenprox, as well as between clothianidin and thiamethoxam, dinotefuran, ethiprole, acetamiprid, and thiacloprid. Similarly, significant correlations were observed between chlorpyrifos and etofenprox, acetamiprid and thiacloprid. Additionally, the activity of the detoxification enzymes of N. lugens showed a significant correlation with the log LC50 values of imidacloprid, dinotefuran and ethiprole. These results will be beneficial for effective insecticide resistance management strategies to prevent or delay the development of insecticide resistance.
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Affiliation(s)
- Xiaolei Zhang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Xun Liao
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Kaikai Mao
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Kaixiong Zhang
- Hubei General Station of Plant Protection, Wuhan 430070, PR China
| | - Hu Wan
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Jianhong Li
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
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