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Farder-Gomes CF, de Oliveira MA, Malaspina O, Nocelli RFC. Exposure of the stingless bee Melipona scutellaris to imidacloprid, pyraclostrobin, and glyphosate, alone and in combination, impair its walking activity and fat body morphology and physiology. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 348:123783. [PMID: 38490525 DOI: 10.1016/j.envpol.2024.123783] [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: 12/05/2023] [Revised: 02/28/2024] [Accepted: 03/11/2024] [Indexed: 03/17/2024]
Abstract
The stingless bee Melipona scutellaris performs buzz pollination, effectively pollinating several wild plants and crops with economic relevance. However, most research has focused on honeybees, leaving a significant gap in studies concerning native species, particularly regarding the impacts of pesticide combinations on these pollinators. Thus, this study aimed to evaluate the sublethal effects of imidacloprid (IMD), pyraclostrobin (PYR), and glyphosate (GLY) on the behavior and fat body cell morphology and physiology of M. scutellaris. Foragers were orally exposed to the different pesticides alone and in combination for 48 h. Bees fed with contaminated solution walked less, moved slower, presented morphological changes in the fat body, including vacuolization, altered cell shape and nuclei morphology, and exhibited a higher count of altered oenocytes and trophocytes. In all exposed groups, alone and in combination, the number of cells expressing caspase-3 increased, but the TLR4 number of cells expressing decreased compared to the control groups. The intensity of HSP70 immunolabeling increased compared to the control groups. However, the intensity of the immunolabeling of HSP90 decreased in the IMD, GLY, and I + G (IMD + GLY) groups but increased in I + P-exposed bees (IMD + PYR). Alternatively, exposure to PYR and P + G (PYR + GLY) did not affect the immunolabeling intensity. Our findings demonstrate the hazardous effects and environmental consequences of isolated and combined pesticides on a vital neotropical pollinator. Understanding how pesticides impact the fat body can provide crucial insights into the overall health and survival of native bee populations, which can help develop more environmentally friendly approaches to agricultural practices.
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Affiliation(s)
- Cliver Fernandes Farder-Gomes
- Departamento de Ciências da Natureza, Matemática e Educação, Universidade Federal de São Carlos Campus Araras, Araras, SP, 13600-970, Brazil.
| | - Marco Antônio de Oliveira
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal de Viçosa Campus Florestal, Florestal, MG, 35690-000, Brazil.
| | - Osmar Malaspina
- Universidade Estadual Paulista (UNESP) - "Júlio de Mesquita Filho", Instituto de Biociências (IB), Rio Claro, SP, 13506-900, Brazil.
| | - Roberta Ferreira Cornélio Nocelli
- Departamento de Ciências da Natureza, Matemática e Educação, Universidade Federal de São Carlos Campus Araras, Araras, SP, 13600-970, Brazil.
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Li XY, Si FL, Zhang XX, Zhang YJ, Chen B. Characteristics of Trypsin genes and their roles in insecticide resistance based on omics and functional analyses in the malaria vector Anopheles sinensis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 201:105883. [PMID: 38685249 DOI: 10.1016/j.pestbp.2024.105883] [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: 01/09/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 05/02/2024]
Abstract
Trypsin is one of the most diverse and widely studied protease hydrolases. However, the diversity and characteristics of the Trypsin superfamily of genes have not been well understood, and their role in insecticide resistance is yet to be investigated. In this study, a total of 342 Trypsin genes were identified and classified into seven families based on homology, characteristic domains and phylogenetics in Anopheles sinensis, and the LY-Domain and CLECT-Domain families are specific to the species. Four Trypsin genes, (Astry2b, Astry43a, Astry90, Astry113c) were identified to be associated with pyrethroid resistance based on transcriptome analyses of three field resistant populations and qRT-PCR validation, and the knock-down of these genes significantly decrease the pyrethroid resistance of Anopheles sinensis based on RNAi. The activity of Astry43a can be reduced by five selected insecticides (indoxacarb, DDT, temephos, imidacloprid and deltamethrin); and however, the Astry43a could not directly metabolize these five insecticides, like the trypsin NYD-Tr did in earlier reports. This study provides the overall information frame of Trypsin genes, and proposes the role of Trypsin genes to insecticide resistance. Further researches are necessary to investigate the metabolism function of these trypsins to insecticides.
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Affiliation(s)
- Xiang-Ying Li
- Chongqing Key Laboratory of Vector Control and Utilization, Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing 401331, China
| | - Feng-Ling Si
- Chongqing Key Laboratory of Vector Control and Utilization, Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing 401331, China
| | - Xiao-Xiao Zhang
- Chongqing Key Laboratory of Vector Control and Utilization, Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing 401331, China
| | - Yu-Juan Zhang
- Chongqing Key Laboratory of Vector Control and Utilization, Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing 401331, China
| | - Bin Chen
- Chongqing Key Laboratory of Vector Control and Utilization, Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing 401331, China.
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Mack LK, Attardo GM. Heat shock proteins, thermotolerance, and insecticide resistance in mosquitoes. FRONTIERS IN INSECT SCIENCE 2024; 4:1309941. [PMID: 38469339 PMCID: PMC10926544 DOI: 10.3389/finsc.2024.1309941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 01/08/2024] [Indexed: 03/13/2024]
Abstract
Mosquitoes transmit pathogens that pose a threat to millions of people globally. Unfortunately, widespread insecticide resistance makes it difficult to control these public health pests. General mechanisms of resistance, such as target site mutations or increased metabolic activity, are well established. However, many questions regarding the dynamics of these adaptations in the context of developmental and environmental conditions require additional exploration. One aspect of resistance that deserves further study is the role of heat shock proteins (HSPs) in insecticide tolerance. Studies show that mosquitoes experiencing heat stress before insecticide exposure demonstrate decreased mortality. This is similar to the observed reciprocal reduction in mortality in mosquitoes exposed to insecticide prior to heat stress. The environmental shifts associated with climate change will result in mosquitoes occupying environments with higher ambient temperatures, which could enhance existing insecticide resistance phenotypes. This physiological relationship adds a new dimension to the problem of insecticide resistance and further complicates the challenges that vector control and public health personnel face. This article reviews studies illustrating the relationship between insecticide resistance and HSPs or hsp genes as well as the intersection of thermotolerance and insecticide resistance. Further study of HSPs and insecticide resistance could lead to a deeper understanding of how environmental factors modulate the physiology of these important disease vectors to prepare for changing climatic conditions and the development of novel strategies to prevent vector-borne disease transmission.
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Affiliation(s)
| | - Geoffrey M. Attardo
- Department of Entomology and Nematology, University of California, Davis, Davis, CA, United States
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Xue G, Wu W, Fan Y, Ma C, Xiong R, Bai Q, Yao X, Weng W, Cheng J, Ruan J. Genome-wide identification, evolution, and role of SPL gene family in beet (Beta vulgaris L.) under cold stress. BMC Genomics 2024; 25:101. [PMID: 38262939 PMCID: PMC10804631 DOI: 10.1186/s12864-024-09995-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 01/09/2024] [Indexed: 01/25/2024] Open
Abstract
BACKGROUND SPL transcription factors play vital roles in regulating plant growth, development, and abiotic stress responses. Sugar beet (Beta vulgaris L.), one of the world's main sugar-producing crops, is a major source of edible and industrial sugars for humans. Although the SPL gene family has been extensively identified in other species, no reports on the SPL gene family in sugar beet are available. RESULTS Eight BvSPL genes were identified at the whole-genome level and were renamed based on their positions on the chromosome. The gene structure, SBP domain sequences, and phylogenetic relationship with Arabidopsis were analyzed for the sugar beet SPL gene family. The eight BvSPL genes were divided into six groups (II, IV, V, VI, VII, and VIII). Of the BvSPL genes, no tandem duplication events were found, but one pair of segmental duplications was present. Multiple cis-regulatory elements related to growth and development were identified in the 2000-bp region upstream of the BvSPL gene start codon (ATG). Using quantitative real-time polymerase chain reaction (qRT-PCR), the expression profiles of the eight BvSPL genes were examined under eight types of abiotic stress and during the maturation stage. BvSPL transcription factors played a vital role in abiotic stress, with BvSPL3 and BvSPL6 being particularly noteworthy. CONCLUSION Eight sugar beet SPL genes were identified at the whole-genome level. Phylogenetic trees, gene structures, gene duplication events, and expression profiles were investigated. The qRT-PCR analysis indicated that BvSPLs play a substantial role in the growth and development of sugar beet, potentially participating in the regulation of root expansion and sugar accumulation.
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Affiliation(s)
- Guoxing Xue
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Weijiao Wu
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Yue Fan
- College of Food Science and Engineering, Xinjiang Institute of Technology, 843199, Aksu, People's Republic of China
| | - Chao Ma
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Ruiqi Xiong
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Qing Bai
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Xin Yao
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Wenfeng Weng
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Jianping Cheng
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Jingjun Ruan
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China.
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Mack LK, Attardo GM. Time-series analysis of transcriptomic changes due to permethrin exposure reveals that Aedes aegypti undergoes detoxification metabolism over 24 h. Sci Rep 2023; 13:16564. [PMID: 37783800 PMCID: PMC10545687 DOI: 10.1038/s41598-023-43676-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/27/2023] [Indexed: 10/04/2023] Open
Abstract
Insecticide resistance is a multifaceted response and an issue across taxa. Aedes aegypti, the mosquito that vectors Zika, dengue, chikungunya, and yellow fever, demonstrates high levels of pyrethroid resistance across the globe, presenting a challenge to public health officials. To examine the transcriptomic shifts across time after exposure to permethrin, a 3'Tag-Seq analysis was employed on samples 6, 10, and 24 h after exposure along with controls. Differential expression analysis revealed significant shifts in detoxifying enzymes and various energy-producing metabolic processes. These findings indicate significant alterations in gene expression associated with key energy mobilization pathways within the system. These changes encompass a coordinated response involving lipolysis, beta-oxidation, and the citric acid cycle, required for the production of energetic molecules such as ATP, NADH, NADPH, and FADH. These findings highlight a complex interplay of metabolic processes that may have broader implications for understanding insect physiology and response to environmental stimuli. Among the upregulated detoxifying enzymes are cytochrome P450s, glutathione s-transferases and peroxidases, and ATP-binding cassette transporters. Additionally, eight heat shock genes or genes with heat shock domains exhibit the highest fold change across time. Twenty-four hours after exposure, samples indicate a global downregulation of these processes, though principal component analysis suggests lasting signatures of the response. Understanding the recovery response to insecticide exposure provides information on possible new genetic and synergist targets to explore.
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Affiliation(s)
- Lindsey K Mack
- Department of Entomology and Nematology, University of California, Davis, Davis, CA, USA
| | - Geoffrey M Attardo
- Department of Entomology and Nematology, University of California, Davis, Davis, CA, USA.
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Tan W, Zhang N, Wang J, Pu T, Hu J, Li C, Song Y. Fumigant activity and transcriptomic analysis of two plant essential oils against the tea green leafhopper, Empoasca onukii Matsuda. Front Physiol 2023; 14:1217608. [PMID: 37795270 PMCID: PMC10546945 DOI: 10.3389/fphys.2023.1217608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 09/04/2023] [Indexed: 10/06/2023] Open
Abstract
Introduction: The tea green leafhopper, Empoasca (Matsumurasca) onukii Matsuda, R., 1952 (Hemiptera: Cicadellidae), is currently one of the most devastating pests in the Chinese tea industry. The long-term use of chemical pesticides has a negative impact on human health, impeding the healthy and sustainable development of the tea industry in this region. Therefore, there is a need for non-chemical insecticides to control E. onukii in tea plants. The essential oils from plants have been identified for their potential insecticidal ability; however, there is a lack of knowledge regarding the effect of plant essential oils on E. onukii and its gene expression. Methods: In order to address these knowledge gaps, the components of Pogostemon cablin and Cinnamomum camphora essential oils were analyzed in the present study using gas chromatography-mass spectrometry. The fumigation toxicity of two essential oils on E. onukii was tested using sealed conical flasks. In addition, We performed comparative transcriptome analyses of E. onukii treated with or without P. cablin essential oil. Results: The 36-h lethal concentration (LC50) values for E. onukii treated with P. cablin and C. camphora essential oils were 0.474 and 1.204 μL mL-1 respectively. Both essential oils exhibited the potential to control E. onukii, but the fumigation activity of P. cablin essential oil was more effective. A total of 2,309 differentially expressed genes were obtained by transcriptome sequencing of E. onukii treated with P. cablin essential oil. Conclusion: Many of differentially expressed genes were found to contain detoxifification genes, indicating that these families may have played an important role when E. onukii was exposed to essential oil stress. We also found differential expression of genes related to redox-related gene families, suggesting the upregulation of genes associated with possible development of drug and stress resistance. This work offers new insights for the prevention and management of E. onukii in the future.
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Affiliation(s)
- Weiwen Tan
- School of Karst Science, Guizhou Normal University, Guiyang, China
- State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
| | - Ni Zhang
- School of Karst Science, Guizhou Normal University, Guiyang, China
- State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
| | - Jinqiu Wang
- School of Karst Science, Guizhou Normal University, Guiyang, China
- State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
| | - Tianyi Pu
- School of Karst Science, Guizhou Normal University, Guiyang, China
- State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
| | - Jifeng Hu
- Huaxi District Plant Protection Station of Guiyang City, Guiyang, China
| | - Can Li
- Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, Guiyang University, Guiyang, China
| | - Yuehua Song
- School of Karst Science, Guizhou Normal University, Guiyang, China
- State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
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Hou Q, Zhang H, Zhu J, Liu F. Transcriptome Analysis to Identify Responsive Genes under Sublethal Concentration of Bifenazate in the Diamondback Moth, Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae). Int J Mol Sci 2022; 23:ijms232113173. [PMID: 36361960 PMCID: PMC9656211 DOI: 10.3390/ijms232113173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/28/2022] [Accepted: 10/25/2022] [Indexed: 11/25/2022] Open
Abstract
Bifenazate is a novel acaricide that has been widely used to control spider mites. Interestingly, we found bifenazate had a biological activity against the diamondback moth (Plutella xylostella), one of the most economically important pests on crucifer crops around the world. However, the molecular mechanisms underlying the response of P. xylostella to bifenazate treatment are not clear. In this study, we first estimated the LC30 dose of bifenazate for third-instar P. xylostella larvae. Then, in order to identify genes that respond to the treatment of this insecticide, the comparative transcriptome profiles were used to analyze the gene expression changes in P. xylostella larvae after exposure to LC30 of bifenazate. In total, 757 differentially expressed genes (DEGs) between bifenazate-treated and control P. xylostella larvae were identified, in which 526 and 231 genes were up-regulated and down-regulated, respectively. The further Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that the xenobiotics metabolisms pathway was significantly enriched, with ten detoxifying enzyme genes (four P450s, five glutathione S-transferases (GSTs), and one UDP-Glucuronosyltransferase (UGT)) were up-regulated, and their expression patterns were validated by qRT-PCR as well. Interestingly, the present results showed that 17 cuticular protein (CP) genes were also remarkably up-regulated, including 15 CPR family genes. Additionally, the oxidative phosphorylation pathway was found to be activated with eight mitochondrial genes up-regulated in bifenazate-treated larvae. In contrast, we found some genes that were involved in tyrosine metabolism and purine pathways were down-regulated, indicating these two pathways of bifenazate-exposed larvae were significantly inhibited. In conclusion, the present study would help us to better understand the molecular mechanisms of sublethal doses of bifenazate detoxification and action in P. xylostella.
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Tao F, Si FL, Hong R, He X, Li XY, Qiao L, He ZB, Yan ZT, He SL, Chen B. Glutathione S-transferase (GST) genes and their function associated with pyrethroid resistance in the malaria vector Anopheles sinensis. PEST MANAGEMENT SCIENCE 2022; 78:4127-4139. [PMID: 35662391 DOI: 10.1002/ps.7031] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Glutathione S-transferases (GSTs), a multifunctional protein family, are involved in insecticide resistance. However, a systematic analysis of GSTs in Anopheles sinensis, an important vector for malaria transmission, is lacking. In this study, we investigated the diversity and characteristics of GST genes, and analyzed their expression patterns and functions associated with insecticide resistance in this species. RESULTS We identified 32 putative cytosolic and three putative microsomal GST genes in the An. sinensis genome. Transcriptome analysis showed that GSTs were highly expressed in larvae, and mainly expressed in the antennae, midgut and Malpighian tubules of adults. In addition, we found that GSTd2 and GSTe2 were significantly upregulated in four An. sinensis pyrethroid-resistant field populations. Furthermore, silencing of GSTd2 and GSTe2 significantly increased the susceptibility of An. sinensis to deltamethrin, and recombinant GSTd2 and GSTe2 exhibited high enzymatic activity in the metabolism of 1-chloro-2,4-dinitrobenzene and dichlorodiphenyltrichloroethane (DDT). CONCLUSION These results showed that GSTs are involved in the development of insecticide resistance in An. sinensis through transcriptional overexpression and enzymatic metabolization, facilitating our understanding of insecticide resistance in insects. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Fei Tao
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Feng-Ling Si
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Rui Hong
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Xiu He
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Xiang-Ying Li
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Liang Qiao
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Zheng-Bo He
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Zhen-Tian Yan
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Shu-Lin He
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
| | - Bin Chen
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People's Republic of China
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Transcriptomic modulation in response to an intoxication with deltamethrin in a population of Triatoma infestans with low resistance to pyrethroids. PLoS Negl Trop Dis 2022; 16:e0010060. [PMID: 35767570 PMCID: PMC9275713 DOI: 10.1371/journal.pntd.0010060] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 07/12/2022] [Accepted: 06/07/2022] [Indexed: 11/19/2022] Open
Abstract
Background
Triatoma infestans is the main vector of Chagas disease in the Southern Cone. The resistance to pyrethroid insecticides developed by populations of this species impairs the effectiveness of vector control campaigns in wide regions of Argentina. The study of the global transcriptomic response to pyrethroid insecticides is important to deepen the knowledge about detoxification in triatomines.
Methodology and findings
We used RNA-Seq to explore the early transcriptomic response after intoxication with deltamethrin in a population of T. infestans which presents low resistance to pyrethroids. We were able to assemble a complete transcriptome of this vector and found evidence of differentially expressed genes belonging to diverse families such as chemosensory and odorant-binding proteins, ABC transporters and heat-shock proteins. Moreover, genes related to transcription and translation, energetic metabolism and cuticle rearrangements were also modulated. Finally, we characterized the repertoire of previously uncharacterized detoxification-related gene families in T. infestans and Rhodnius prolixus.
Conclusions and significance
Our work contributes to the understanding of the detoxification response in vectors of Chagas disease. Given the absence of an annotated genome from T. infestans, the analysis presented here constitutes a resource for molecular and physiological studies in this species. The results increase the knowledge on detoxification processes in vectors of Chagas disease, and provide relevant information to explore undescribed potential insecticide resistance mechanisms in populations of these insects.
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10
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Dong B, Liu XY, Li B, Li MY, Li SG, Liu S. A heat shock protein protects against oxidative stress induced by lambda-cyhalothrin in the green peach aphid Myzus persicae. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 181:104995. [PMID: 35082025 DOI: 10.1016/j.pestbp.2021.104995] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/24/2021] [Accepted: 11/16/2021] [Indexed: 06/14/2023]
Abstract
Lambda-cyhalothrin (LCT) is a pyrethroid insecticide widely used to control insect pests. Insect exposure to LCT may cause abnormal accumulation of reactive oxygen species (ROS) and result in oxidative damage. Heat shock proteins (HSPs) may help protect against oxidative stress. However, little is known about the role of HSPs in response to LCT in the green peach aphid, Myzus persicae. This insect is an important agricultural pest causing severe yield losses in crops. In this study, we characterized a cDNA sequence (MpHsp70) encoding a member of the HSP70 family in M. persicae. MpHsp70 encoded a 623 amino acid protein putatively localized in the cytosol. The highest expression level of MpHsp70 occurred in fourth-instar nymphs. Treatment of M. persicae with LCT resulted in oxidative stress and significantly increased H2O2 and malondialdehyde levels. This led to an elevated transcription level of MpHsp70. Injection of H2O2 into M. persicae also upregulated the MpHsp70 expression level, suggesting that MpHsp70 is responsive to ROS, particularly H2O2, induced by LCT. Recombinant MpHSP70 protein was expressed in Escherichia coli. E. coli cells overexpressing MpHSP70 exhibited significant tolerance to H2O2 and the ROS generators, cumene hydroperoxide and paraquat. This indicated that MpHSP70 protects against oxidative stress. Furthermore, knockdown of MpHsp70 by RNA interference resulted in increased susceptibility in apterous adults of M. persicae to LCT. These findings indicate that MpHsp70 plays an important role in defense against LCT-induced oxidative stress and insecticide susceptibility in M. persicae.
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Affiliation(s)
- Bao Dong
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Xi-Ya Liu
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Bin Li
- Department of Science and Technology, Sichuan Provincial Branch of China National Tobacco Corporation, Chengdu 610041, China.
| | - Mao-Ye Li
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Shi-Guang Li
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Su Liu
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
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11
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Shu B, Yu H, Li Y, Zhong H, Li X, Cao L, Lin J. Identification of azadirachtin responsive genes in Spodoptera frugiperda larvae based on RNA-seq. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 172:104745. [PMID: 33518039 DOI: 10.1016/j.pestbp.2020.104745] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/20/2020] [Accepted: 11/02/2020] [Indexed: 06/12/2023]
Abstract
The fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) is a polyphagous pest with 353 plant species as its hosts, including maize, sorghum, cotton, and rice. Azadirachtin is one of the most effective botanical insecticides. The effect of azadirachtin against S. frugiperda remains to be determined. Here we report strong growth inhibition of azadirachtin on S. frugiperda larvae under either 1.0 or 5.0 μg/g azadirachtin. To explore the relevant mechanisms, the larvae fed with normal artificial diet and with 1.0 μg/g azadirachtin exposure for 3 days were collected as samples for RNA-Seq. RNA-Seq on S. frugiperda larvae under different treatments identified a total of 24,153 unigenes, including 3494 novel genes, were identified. Among them, 1282 genes were affected by 1.0 μg/g azadirachtin exposure, with 672 up-regulated and 610 down-regulated. The impacted genes include 61 coding for detoxification enzymes (31 P450s, 7 GSTs, 11 CarEs, 7 UGTs and 5 ABC transporters), 31 for cuticle proteins, and several proteins involved in insect chitin and hormone biosynthesis. Our results indicated that azadirachtin could regulate the growth of S. frugiperda by affecting insect chitin and hormone biosynthesis pathway. The enhanced expression of detoxification enzymes might be related to detoxifying azadirachtin. These findings provided a foundation for further delineating the molecular mechanism of growth regulation induced by azadirachtin in S. frugiperda larvae.
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Affiliation(s)
- Benshui Shu
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Haikuo Yu
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Yuning Li
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Hongxin Zhong
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Xiangli Li
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Liang Cao
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Jintian Lin
- Guangzhou City Key Laboratory of Subtropical Fruit Trees Outbreak Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China.
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Jia D, Liu YH, Zhang B, Ji ZY, Wang YX, Gao LL, Ma RY. Induction of Heat Shock Protein Genes is the Hallmark of Egg Heat Tolerance in Agasicles hygrophila (Coleoptera: Chrysomelidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:1972-1981. [PMID: 32449773 DOI: 10.1093/jee/toaa105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Indexed: 06/11/2023]
Abstract
Insects are ecotothermic organisms. Their development, survival, reproduction as well as distribution and abundance are affected by temperature. Heat shock protein (HSP) gene expression is closely associated with temperature variation and influences the adaptation of organisms to adverse environments. The beetle Agasicles hygrophila has successfully been used for biological control of the invasive plant alligator weed (Alternanthera philoxeroides). As A. hygrophila populations are substantially inhibited by high temperatures in the summer, increasing global temperatures may limit the efficacy of this control agent. We previously established that A. hygrophila eggs have low tolerance to heat and this factored into the decreased numbers of A. hygrophila beetles at temperatures of 37.5°C and above. Here, we identified 26 HSP genes in A. hygrophila and examined the relationship between the transcript levels of these genes and heat tolerance. The temperature at which the expression of these 21 HSP genes peaked (Tpeak) was 37.5°C, which is in line with the limit of the high temperatures that A. hygrophila eggs tolerate. Therefore, we speculate that the Tpeak of HSP gene expression in eggs indicates the upper limit of temperatures that A. hygrophila eggs tolerate. This study identifies HSP genes as potential robust biomarkers and emphasizes that determining species' heat tolerance in their natural habitats remains an important consideration for biocontrol. HSP gene expression data provide information about a species' heat tolerance and may be used to predict its geographical distribution.
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Affiliation(s)
- Dong Jia
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Yan-Hong Liu
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Bin Zhang
- College of Horticulture, Shanxi Agricultural University, Taigu, China
| | - Zhou-Yu Ji
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Yuan-Xin Wang
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Ling-Ling Gao
- CSIRO Agriculture and Food, Centre for Environment and Life Sciences, Wembley, Western Australia, Australia
| | - Rui-Yan Ma
- College of Agriculture, Shanxi Agricultural University, Taigu, China
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Guo S, Cao L, Song W, Shi P, Gao Y, Gong Y, Chen J, Hoffmann AA, Wei S. Chromosome‐level assembly of the melon thrips genome yields insights into evolution of a sap‐sucking lifestyle and pesticide resistance. Mol Ecol Resour 2020; 20:1110-1125. [DOI: 10.1111/1755-0998.13189] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/28/2020] [Accepted: 05/11/2020] [Indexed: 12/21/2022]
Affiliation(s)
- Shao‐Kun Guo
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Li‐Jun Cao
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Wei Song
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Pan Shi
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Yong‐Fu Gao
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Ya‐Jun Gong
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Jin‐Cui Chen
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
| | - Ary Anthony Hoffmann
- School of BioSciences Bio21 Molecular Science & Biotechnology Institute University of Melbourne Parkville Vic. Australia
| | - Shu‐Jun Wei
- Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China
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