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Liu X, Ji M, Gao Y, Li Y, Zhao Z, Zhang J. Coat protein I genes are essential for the morphogenesis of the intestinal tract in Locusta migratoria. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2025; 208:106291. [PMID: 40015883 DOI: 10.1016/j.pestbp.2025.106291] [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: 10/16/2024] [Revised: 01/07/2025] [Accepted: 01/08/2025] [Indexed: 03/01/2025]
Abstract
The coat protein I (COPI) complex is crucial in several significant physiological processes in eukaryotes. The assembly of COPI vesicles is initiated by the recruitment of adenosine diphosphate-ribosylation factor 1 (Arf1) to the membrane. Previous studies have primarily focused on the roles of COPI in yeast, humans, insects, and beyond Drosophila. However, the function of COPI during the development of insects remains largely unknown. In this study, we first identified eight COPI assembly genes, including α-, β-, β'-, γ-, δ-, ε-, ζ-COPI, and Arf1 in Locusta migratoria. Quantitative reverse-transcription polymerase chain reaction revealed that these genes were uniformly expressed in multiple tissues, including wing pads, leg, foregut, midgut, hindgut, and gastric cecum, and on all developmental days in 5th-instar nymphs. The injection of double-stranded RNAs (dsRNAs) against LmCOPI and LmArf1 induced high silencing efficiency in the 3rd- and 5th-instar nymphs. Locusts treated with dsLmCOPIs and dsLmArf1 exhibited feeding cessation, leading to 100 % mortality. LmCOPIs and LmArf1 knockdown resulted in midgut and gastric cecum atrophy. Histological observation and hematoxylin-eosin staining indicated that the midgut and gastric cecum exhibited deformed structures, with defective microvilli and midgut peritrophic matrix. These results suggest that LmCOPIs and LmArf1 significantly affect the intestinal tract morphogenesis in locust nymphs. Thus, COPI assembly genes are promising RNA interference targets for managing L. migratoria, reducing the dependence on chemical pesticides for pest control.
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Affiliation(s)
- Xiaojian Liu
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan 030006, China
| | - Mingzhu Ji
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan 030006, China
| | - Ya Gao
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan 030006, China
| | - Yao Li
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan 030006, China
| | - Zhangwu Zhao
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan 030006, China
| | - Jianzhen Zhang
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan 030006, China.
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Wang F, Zhou K, Yu Y, Peng L, Ye Y, Lin C, Xu C, Shen Z. RNAi-based transgenic maize to control double-spotted leaf beetle (Monolepta hieroglyphica). PEST MANAGEMENT SCIENCE 2025; 81:1412-1421. [PMID: 39552424 DOI: 10.1002/ps.8543] [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: 06/03/2024] [Revised: 10/21/2024] [Accepted: 11/04/2024] [Indexed: 11/19/2024]
Abstract
BACKGROUND The double-spotted leaf beetle (DLB), Monolepta hieroglyphica, is becoming a significant corn pest in China. It mainly attacks corn silk and developing kernels during the adult stage and is causing significant corn yield loss in north-eastern China. The damage caused by DLB is expected to worsen as pesticide usage is likely to decrease along with the upcoming commercial planting of transgenic lepidopteran-resistant maize in China. Therefore, it is highly desirable to develop transgenic corn for DLB resistance. RESULTS Three target genes, MhSsj1, MhSnf7 and MhSec23A were cloned from DLB by their sequence similarity to their corresponding homologous genes known for their effectiveness as RNA interference (RNAi) targets in western corn rootworm (WCR, Diabrotica virgifera virgifera). Injection of the double-stranded RNAs (dsRNAs) of MhSsj1, MhSnf7 and MhSec23A to DLB adults was highly effective to suppress the messenger RNAs (mRNAs) of these genes and resulted in high mortality. Furthermore, a synergistic effect was observed among the dsRNAs of these three target genes. Transgenic maize plants simultaneously transcribing dsRNAs of any two of the three target genes were found to be highly resistant to DLB adults, showcasing the potential of utilizing RNAi-based strategy for transgenic DLB control. CONCLUSION MhSsj1, MhSnf7 and MhSec23A are effective RNAi target genes and transgenic corn based on suppression of these genes by RNAi are effective for controlling adult DLB. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Fahao Wang
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | - Kangdi Zhou
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | - Yifan Yu
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | - Luyao Peng
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | - Yuxuan Ye
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
- Zhejiang University Zhongyuan Institute, Zhengzhou, China
| | - Chaoyang Lin
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | - Chao Xu
- Hangzhou Ruifeng Biosciences Ltd, Hangzhou, China
| | - Zhicheng Shen
- State Key Laboratory of Rice Biology and Breeding, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
- Hangzhou Ruifeng Biosciences Ltd, Hangzhou, China
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3
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Cedden D, Bucher G. The quest for the best target genes for RNAi-mediated pest control. INSECT MOLECULAR BIOLOGY 2024. [PMID: 39450789 DOI: 10.1111/imb.12966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Accepted: 10/10/2024] [Indexed: 10/26/2024]
Abstract
RNA interference (RNAi) has emerged as an eco-friendly alternative to classic pesticides for pest control. This review highlights the importance of identifying the best target genes for RNAi-mediated pest control. We argue that the knowledge-based approach to predicting effective targets is limited by our current gaps of knowledge, making unbiased screening a superior method for discovering the best target processes and genes. We emphasize the recent evidence that suggests targeting conserved basic cellular processes, such as protein degradation and translation, is more effective than targeting the classic pesticide target processes. We support these claims by comparing the efficacy of previously reported RNAi target genes and classic insecticide targets with data from our genome-wide RNAi screen in the red flour beetle, Tribolium castaneum. Finally, we provide practical advice for identifying excellent target genes in other pests, where large-scale RNAi screenings are typically challenging.
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Affiliation(s)
- Doga Cedden
- Department of Evolutionary Developmental Genetics, Johann-Friedrich-Blumenbach Institute, GZMB, University of Göttingen, Göttingen, Germany
| | - Gregor Bucher
- Department of Evolutionary Developmental Genetics, Johann-Friedrich-Blumenbach Institute, GZMB, University of Göttingen, Göttingen, Germany
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Liu X, Li Y, Gao Y, El Wakil A, Moussian B, Zhang J. RNA interference-mediated silencing of coat protein II (COPII) genes affects the gut homeostasis and cuticle development in Locusta migratoria. Int J Biol Macromol 2024; 266:131137. [PMID: 38537854 DOI: 10.1016/j.ijbiomac.2024.131137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/08/2024] [Accepted: 03/23/2024] [Indexed: 04/06/2024]
Abstract
The coat protein II (COPII) complex consists of five primary soluble proteins, namely the small GTP-binding protein Sar1, the inner coat Sec23/Sec24 heterodimers, and the outer coat Sec13/Sec31 heterotetramers. COPII is essential for cellular protein and lipid trafficking through cargo sorting and vesicle formation at the endoplasmic reticulum. However, the roles of COPII assembly genes remain unknown in insects. In present study, we identified five COPII assembly genes (LmSar1, LmSec23, LmSec24, LmSec13 and LmSec31) in Locusta migratoria. RT-qPCR results revealed that these genes showed different expression patterns in multiple tissues and developmental days of fifth-instar nymphs. Injection of double-stranded RNA against each LmCOPII gene induced a high RNAi efficiency, and considerably suppressed feeding, and increased mortality to 100 %. Results from the micro-sectioning and hematoxylin-eosin staining of midguts showed that the brush border was severely damaged and the number of columnar cells was significantly reduced in dsLmCOPII-injected nymphs, as compared with the control. The dilated endoplasmic reticulum phenotype of columnar cells was observed by transmission electron microscopy. RT-qPCR results further indicated that silencing any of the five genes responsible for COPII complex assembly repressed the expression of genes involved in insulin/mTOR-associated nutritional pathway. Therefore, COPII assembly genes could be promising RNAi targets for insect pest management by disrupting gut and cuticle development.
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Affiliation(s)
- Xiaojian Liu
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Yao Li
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Ya Gao
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Abeer El Wakil
- Faculty of Education, Department of Biological and Geological Sciences, Alexandria University, Alexandria, Egypt
| | - Bernard Moussian
- INRAE, CNRS, Université Côte d'Azur, Institut Sophia Agrobiotech, Sophia Antipolis, France
| | - Jianzhen Zhang
- Shanxi Key Laboratory of Nucleic Acid Biopesticides, Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China.
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Cedden D, Güney G, Scholten S, Rostás M. Lethal and sublethal effects of orally delivered double-stranded RNA on the cabbage stem flea beetle, Psylliodes chrysocephala. PEST MANAGEMENT SCIENCE 2024; 80:2282-2293. [PMID: 37020381 DOI: 10.1002/ps.7494] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 03/09/2023] [Accepted: 04/06/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND The cabbage stem flea beetle (Psylliodes chrysocephala) is one of the most important insect pests of oilseed rape (Brassica napus) in northern Europe. The emergence of insecticide-resistant populations and the ban on neonicotinoid seed treatments have made the management of this pest challenging and research is needed to develop alternative strategies such as RNA interference (RNAi). We investigated lethal and sublethal effects of orally delivered double-stranded (ds)RNAs targeting P. chrysocephala orthologs of Sec23 and vacuolar adenosine triphosphatase subunit G (VatpG), which are involved in endoplasmic reticulum-Golgi transport and organelle acidification, respectively. RESULTS Feeding bioassays on P. chrysocephala adults showed that the highest concentration (200 ng/leaf disk) of dsSec23 caused mortalities of 76% and 56% in pre-aestivating and post-aestivating beetles, respectively, while the same concentration of dsVatpG led to mortality rates of ~34% in both stages. Moreover, sublethal effects, such as decreased feeding rates and attenuated locomotion were observed. Small RNA sequencing and gene expression measurements following the delivery of dsRNAs demonstrated the generation of ~21 nucleotide-long small interfering RNAs and a systemic RNAi response in P. chrysocephala. CONCLUSION We demonstrate that P. chrysocephala is a promising candidate for developing RNAi-based pest management strategies. Further research is necessary to identify more effective target genes and to assess potential non-target effects. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Doga Cedden
- Agricultural Entomology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany
- Department of Evolutionary Developmental Genetics, Johann-Friedrich-Blumenbach Institute, GZMB, University of Göttingen, Göttingen, Germany
| | - Gözde Güney
- Agricultural Entomology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany
| | - Stefan Scholten
- Division of Crop Plant Genetics, Department of Crop Sciences, University of Göttingen, Göttingen, Germany
| | - Michael Rostás
- Agricultural Entomology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany
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Xie Y, Tan Y, Wen X, Deng W, Yu J, Li M, Meng F, Wang X, Zhu D. The Expression and Function of Notch Involved in Ovarian Development and Fecundity in Basilepta melanopus. INSECTS 2024; 15:292. [PMID: 38667422 PMCID: PMC11050577 DOI: 10.3390/insects15040292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/10/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
Basilepta melanopus is a pest that severely affects oil tea plants, and the Notch signaling pathway plays a significant role in the early development of insect ovaries. In this study, we explored the function of the notch gene within the Notch signaling pathway in the reproductive system of B. melanopus. The functional domains and expression patterns of Bmnotch were analyzed. Bmnotch contains 45 epidermal growth factor-like (EGF-like) domains, one negative regulatory region, one NODP domain and one repeat-containing domain superfamily. The qPCR reveals heightened expression in early developmental stages and specific tissues like the head and ovaries. The RNA interference (RNAi)-based suppression of notch decreased its expression by 52.1%, exhibiting heightened sensitivity to dsNotch at lower concentrations. Phenotypic and mating experiments have demonstrated that dsNotch significantly impairs ovarian development, leading to reduced mating frequencies and egg production. This decline underscores the Notch pathway's crucial role in fecundity. The findings advocate for RNAi-based, Notch-targeted pest control as an effective and sustainable strategy for managing B. melanopus populations, signifying a significant advancement in forest pest control endeavors.
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Affiliation(s)
- Yifei Xie
- Laboratory of Insect Behavior and Evolutionary Ecology, College of Life and Environmental Sciences, Central South University of Forestry and Technology, Changsha 410004, China; (Y.X.); (Y.T.); (F.M.)
- Institute of Forestry and Grassland Protection, Hunan Academy of Forestry, Changsha 410018, China; (W.D.); (J.Y.); (M.L.)
| | - Yifan Tan
- Laboratory of Insect Behavior and Evolutionary Ecology, College of Life and Environmental Sciences, Central South University of Forestry and Technology, Changsha 410004, China; (Y.X.); (Y.T.); (F.M.)
| | - Xuanye Wen
- Center for Biological Disaster Prevention and Control, National Forestry and Grassland Administration, Shenyang 110031, China;
| | - Wan Deng
- Institute of Forestry and Grassland Protection, Hunan Academy of Forestry, Changsha 410018, China; (W.D.); (J.Y.); (M.L.)
| | - Jinxiu Yu
- Institute of Forestry and Grassland Protection, Hunan Academy of Forestry, Changsha 410018, China; (W.D.); (J.Y.); (M.L.)
| | - Mi Li
- Institute of Forestry and Grassland Protection, Hunan Academy of Forestry, Changsha 410018, China; (W.D.); (J.Y.); (M.L.)
| | - Fanhui Meng
- Laboratory of Insect Behavior and Evolutionary Ecology, College of Life and Environmental Sciences, Central South University of Forestry and Technology, Changsha 410004, China; (Y.X.); (Y.T.); (F.M.)
| | - Xiudan Wang
- Laboratory of Insect Behavior and Evolutionary Ecology, College of Life and Environmental Sciences, Central South University of Forestry and Technology, Changsha 410004, China; (Y.X.); (Y.T.); (F.M.)
| | - Daohong Zhu
- Laboratory of Insect Behavior and Evolutionary Ecology, College of Life and Environmental Sciences, Central South University of Forestry and Technology, Changsha 410004, China; (Y.X.); (Y.T.); (F.M.)
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7
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Pinto MMD, Ferreira Dos Santos R, De Bortoli SA, Moar W, Jurat-Fuentes JL. Lack of fitness costs in dsRNA-resistant Leptinotarsa decemlineata ([Coleoptera]: [Chrysomelidae]). JOURNAL OF ECONOMIC ENTOMOLOGY 2023; 116:1352-1359. [PMID: 37262318 DOI: 10.1093/jee/toad095] [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: 10/12/2022] [Revised: 04/10/2023] [Accepted: 05/11/2023] [Indexed: 06/03/2023]
Abstract
The Colorado potato beetle, Leptinotarsa decemlineata (Say) ([Coleoptera]: [Chrysomelidae]), is the most important defoliator of solanaceous plants worldwide. This insect displays a notorious ability in adapting to biological and synthetic insecticides, although in some cases this adaptation carries relevant fitness costs. Insecticidal gene silencing by RNA interference is a novel mode of action pesticide against L. decemlineata that is activated by ingestion of a double stranded RNA (dsRNA) targeting a vital L. decemlineata gene. We previously reported laboratory selection of a > 11,000-fold resistant strain of L. decemlineata to a dsRNA delivered topically to potato leaves. In this work, we tested the existence of fitness costs in this dsRNA-resistant colony by comparing biological parameters to the parental strain and an additional susceptible reference strain. Biological parameters included length of egg incubation period, number of eggs per clutch, egg viability, larval viability, length of larval and pupal periods, adult emergence, number of eggs laid per day, sex ratio, and adult longevity. Comparisons between the 3 beetle strains detected no fitness costs associated with resistance to dsRNA. This information is important to guide effective insect resistance management plans for dsRNA insecticides against L. decemlineata applied topically to potato leaves.
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Affiliation(s)
- M M D Pinto
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA
- Department of Agricultural Sciences, School of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, SP, Brazil
| | - R Ferreira Dos Santos
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA
| | - S A De Bortoli
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA
- Department of Agricultural Sciences, School of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, SP, Brazil
| | - W Moar
- Bayer Crop Science, Chesterfield, MO, USA
| | - J L Jurat-Fuentes
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA
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8
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Guo M, Gao R, Nanda S, Li Y, Guo C, Zhou X, Zhang Y, Yang C, Pan H. RNAi assays in the striped flea beetle (Phyllotreta striolata) suggest Psγ-COPI and PsArf1COPI as potential molecular targets for pest control. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 193:105428. [PMID: 37248006 DOI: 10.1016/j.pestbp.2023.105428] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/06/2023] [Accepted: 04/18/2023] [Indexed: 05/31/2023]
Abstract
Phyllotreta striolata (Fabricius), commonly known as the striped flea beetle (SFB), is a notorious insect pest that attacks Brassicaceae plants worldwide, leading to tremendous economic losses. RNA interference (RNAi) has been proposed as a promising strategy for sustainable and eco-friendly pest control. In this study, a total of nine housekeeping genes including PsVATPA, PsHSP90, PsEF1A, PsRPL6, PsRPS24, PsActin, PsTUBA, PsRPS18, and PsRPL4 were evaluated under four different conditions (organization, population, sex, and RNAi). PsEF1A and PsVATPA were identified as the best reference genes for RNAi bioassay. Furthermore, a total of 24 target genes were selected to investigate their RNAi effects in SFB adults with double-stranded RNAs (dsRNAs), five of them showed significant mortality (28.00% to 70.00%), namely Psα-COPI, Psβ-COPI, PsRPS18, Psγ-COPI, and PsArf1COPI. We found that gene transcript levels of the two most lethal genes, Psγ-COPI and PsArf1COPI, were significantly decreased after treated with the target dsRNAs either by feeding or injection method. The findings from this study demonstrated that the introduction of dsRNAs via oral feedings or injection induces the RNAi-mediated silencing of target genes and can lead to insect mortality. Overall, the identified target genes can be explored in developing RNAi-based insecticides for SFB control.
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Affiliation(s)
- Mujuan Guo
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Ran Gao
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Satyabrata Nanda
- MS Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi, 761200, India
| | - Yingqiu Li
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Changfei Guo
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Xuguo Zhou
- Department of Entomology, University of Kentucky, Lexington, 40546, USA
| | - Youjun Zhang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chunxiao Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China.
| | - Huipeng Pan
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China.
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Sana S, Vollhardt I, Kubon K, Rostás M, Scholten S. De novo transcriptome assemblies of five major European oilseed rape insect pests. BMC Genom Data 2023; 24:15. [PMID: 36899327 PMCID: PMC10007812 DOI: 10.1186/s12863-023-01115-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 02/17/2023] [Indexed: 03/12/2023] Open
Abstract
OBJECTIVE Insect pests can cause severe losses in oilseed rape yields across Europe. Genomic and transcriptomic information is very limited for these insects. The aim of our study was to provide transcriptomic resources on several oilseed rape herbivores that will support research into their biology and help develop new methods of sustainable pest management. DATA Transcriptomes for larval stages of five major European pest species were de novo assembled by Trinity assembler. Total number of transcripts ranged from 112,247 for Ceutorhynchus pallidactylus to 225,110 for Ceutorhyncus napi. Intermediate numbers of 140,588, 140,998 and 144,504, were found for Psylliodes chrysocephala, Dasineura brassicae, and Brassicogethes aeneus, respectively. Bench-marking universal single-copy orthologues analyses for each dataset indicated high degree of completeness for all five species. The transcriptomes extend the list of genomic data on insect larvae that constitute major pests of oilseed rape. The data provide information on larval physiology and form a basis to develop highly specific RNA interference-based plant protection.
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Affiliation(s)
- Salma Sana
- Division of Crop Plant Genetics, Department of Crop Science, Georg-August-University Goettingen, Goettingen, Germany
| | - Ines Vollhardt
- Division of Agricultural Entomology, Department of Crop Science, Georg-August-University Goettingen, Goettingen, Germany
| | - Katharina Kubon
- Division of Crop Plant Genetics, Department of Crop Science, Georg-August-University Goettingen, Goettingen, Germany
| | - Michael Rostás
- Division of Agricultural Entomology, Department of Crop Science, Georg-August-University Goettingen, Goettingen, Germany
| | - Stefan Scholten
- Division of Crop Plant Genetics, Department of Crop Science, Georg-August-University Goettingen, Goettingen, Germany.
- Center for integrated Breeding Research (CiBreed), Goettingen, Germany.
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List F, Tarone AM, Zhu‐Salzman K, Vargo EL. RNA meets toxicology: efficacy indicators from the experimental design of RNAi studies for insect pest management. PEST MANAGEMENT SCIENCE 2022; 78:3215-3225. [PMID: 35338587 PMCID: PMC9541735 DOI: 10.1002/ps.6884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 03/07/2022] [Accepted: 03/26/2022] [Indexed: 05/27/2023]
Abstract
RNA interference (RNAi) selectively targets genes and silences their expression in vivo, causing developmental defects, mortality and altered behavior. Consequently, RNAi has emerged as a promising research area for insect pest management. However, it is not yet a viable alternative over conventional pesticides despite several theoretical advantages in safety and specificity. As a first step toward a more standardized approach, a machine learning algorithm was used to identify factors that predict trial efficacy. Current research on RNAi for pest management is highly variable and relatively unstandardized. The applied random forest model was able to reliably predict mortality ranges based on bioassay parameters with 72.6% accuracy. Response time and target gene were the most important variables in the model, followed by applied dose, double-stranded RNA (dsRNA) construct size and target species, further supported by generalized linear mixed effect modeling. Our results identified informative trends, supporting the idea that basic principles of toxicology apply to RNAi bioassays and provide initial guidelines standardizing future research similar to studies of traditional insecticides. We advocate for training that integrates genetic, organismal, and toxicological approaches to accelerate the development of RNAi as an effective tool for pest management. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Fabian List
- Department of EntomologyTexas A&M UniversityCollege StationTXUSA
| | - Aaron M Tarone
- Department of EntomologyTexas A&M UniversityCollege StationTXUSA
| | | | - Edward L Vargo
- Department of EntomologyTexas A&M UniversityCollege StationTXUSA
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11
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Tian Z, Guo S, Zhu F, Liu W, Wang XP. Targeting coat protein II complex genes via RNA interference inhibits female adult feeding and reproductive development in the cabbage beetle Colaphellus bowringi. PEST MANAGEMENT SCIENCE 2022; 78:2141-2150. [PMID: 35171515 DOI: 10.1002/ps.6836] [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: 08/27/2021] [Revised: 01/17/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND The cabbage beetle Colaphellus bowringi is a highly destructive cruciferous vegetable pest in Asia. This beetle is predominantly controlled by synthetic chemical pesticides, which leave pesticide residues on food and constitute a major hidden danger to human health. Based on preliminary research, we hypothesized that the coat protein II (COPII) complex, a primary coated vesicle that exports cargo molecules from the endoplasmic reticulum, is a promising novel target for the control of Colaphellus bowringi. RESULTS This study investigated whether disrupting COPII using RNA interference (RNAi) affects the growth and development of Colaphellus bowringi adults. The results showed that five COPII assembly genes, Sar1, Sec23, Sec24, Sec13, and Sec31, were uniformly expressed in multiple tissues of adult female Colaphellus bowringi. Injecting double-stranded RNA (dsRNA) against each gene induced a high RNAi efficiency by approximately 55-99%, and considerably inhibited yolk deposition and ovarian growth. Moreover, knockdown of Sar1, Sec23 and Sec24 suppressed feeding and increased mortality to 26.67%, 46.67%, and 42.22%, respectively. This was partially due to the down-regulation of insulin/mTOR-associated nutritional pathways. The results indicate that silencing any of the five genes responsible for COPII complex assembly represses Juvenile hormone and ecdysone signaling pathways, suggesting that vesicle transport plays a vital role in the endocrine regulation of Colaphellus bowringi females. CONCLUSION This study suggests that the COPII complex could be a promising RNAi target for the management of Colaphellus bowringi, which would reduce our dependence on chemical pesticides for pest control. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Zhong Tian
- Hubei Key Laboratory of Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Shuang Guo
- Hubei Key Laboratory of Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Fen Zhu
- Hubei Key Laboratory of Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wen Liu
- Hubei Key Laboratory of Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xiao-Ping Wang
- Hubei Key Laboratory of Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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12
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Darlington M, Reinders JD, Sethi A, Lu AL, Ramaseshadri P, Fischer JR, Boeckman CJ, Petrick JS, Roper JM, Narva KE, Vélez AM. RNAi for Western Corn Rootworm Management: Lessons Learned, Challenges, and Future Directions. INSECTS 2022; 13:57. [PMID: 35055900 PMCID: PMC8779393 DOI: 10.3390/insects13010057] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/17/2021] [Accepted: 12/28/2021] [Indexed: 02/06/2023]
Abstract
The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte, is considered one of the most economically important pests of maize (Zea mays L.) in the United States (U.S.) Corn Belt with costs of management and yield losses exceeding USD ~1-2 billion annually. WCR management has proven challenging given the ability of this insect to evolve resistance to multiple management strategies including synthetic insecticides, cultural practices, and plant-incorporated protectants, generating a constant need to develop new management tools. One of the most recent developments is maize expressing double-stranded hairpin RNA structures targeting housekeeping genes, which triggers an RNA interference (RNAi) response and eventually leads to insect death. Following the first description of in planta RNAi in 2007, traits targeting multiple genes have been explored. In June 2017, the U.S. Environmental Protection Agency approved the first in planta RNAi product against insects for commercial use. This product expresses a dsRNA targeting the WCR snf7 gene in combination with Bt proteins (Cry3Bb1 and Cry34Ab1/Cry35Ab1) to improve trait durability and will be introduced for commercial use in 2022.
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Affiliation(s)
- Molly Darlington
- Department of Entomology, University of Nebraska, Lincoln, NE 68583, USA; (M.D.); (J.D.R.)
| | - Jordan D. Reinders
- Department of Entomology, University of Nebraska, Lincoln, NE 68583, USA; (M.D.); (J.D.R.)
| | - Amit Sethi
- Corteva Agriscience, Johnston, IA 50131, USA; (A.S.); (A.L.L.); (C.J.B.); (J.M.R.)
| | - Albert L. Lu
- Corteva Agriscience, Johnston, IA 50131, USA; (A.S.); (A.L.L.); (C.J.B.); (J.M.R.)
| | | | - Joshua R. Fischer
- Bayer Crop Science, Chesterfield, MO 63017, USA; (P.R.); (J.R.F.); (J.S.P.)
| | - Chad J. Boeckman
- Corteva Agriscience, Johnston, IA 50131, USA; (A.S.); (A.L.L.); (C.J.B.); (J.M.R.)
| | - Jay S. Petrick
- Bayer Crop Science, Chesterfield, MO 63017, USA; (P.R.); (J.R.F.); (J.S.P.)
| | - Jason M. Roper
- Corteva Agriscience, Johnston, IA 50131, USA; (A.S.); (A.L.L.); (C.J.B.); (J.M.R.)
| | | | - Ana M. Vélez
- Department of Entomology, University of Nebraska, Lincoln, NE 68583, USA; (M.D.); (J.D.R.)
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Willow J, Veromann E. Highly Variable Dietary RNAi Sensitivity Among Coleoptera. FRONTIERS IN PLANT SCIENCE 2021; 12:790816. [PMID: 34950174 PMCID: PMC8688912 DOI: 10.3389/fpls.2021.790816] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/18/2021] [Indexed: 06/14/2023]
Abstract
Many herbivorous beetles (Order Coleoptera) contribute to serious losses in crop yields and forest trees, and plant biotechnology solutions are being developed with the hope of limiting these losses. Due to the unprecedented target-specificity of double-stranded RNA (dsRNA), and its utility in inducing RNA interference (RNAi) when consumed by target pest species, dsRNA-based plant biotechnology approaches represent the cutting edge of current pesticide research and development. We review dietary RNAi studies in coleopterans and discuss prospects and future directions regarding RNAi-based management of coleopteran plant pests. Herein, we also provide a balanced overview of existing studies in order to provide an accurate re-assessment of dietary RNAi sensitivity in coleopterans, despite the limitations to the existing body of scientific literature. We further discuss impediments to our understanding of RNAi sensitivity in this important insect order and identify critical future directions for research in this area, with an emphasis on using plant biotechnology approaches.
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Affiliation(s)
- Jonathan Willow
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
- Department of Plants and Crops, Laboratory of Agrozoology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Eve Veromann
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
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14
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RNAi efficacy is enhanced by chronic dsRNA feeding in pollen beetle. Commun Biol 2021; 4:444. [PMID: 33824392 PMCID: PMC8024372 DOI: 10.1038/s42003-021-01975-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 03/10/2021] [Indexed: 01/02/2023] Open
Abstract
Double-stranded RNAs (dsRNAs) represent a promising class of biosafe insecticidal compounds. We examined the ability to induce RNA interference (RNAi) in the pollen beetle Brassicogethes aeneus via anther feeding, and compared short-term (3 d) to chronic (17 d) feeding of various concentrations of dsRNA targeting αCOP (dsαCOP). In short-term dsαCOP feeding, only the highest concentration resulted in significant reductions in B. aeneus survival; whereas in chronic dsαCOP feeding, all three concentrations resulted in significant mortality. Chronic dsαCOP feeding also resulted in significantly greater mortality compared to short-term feeding of equivalent dsαCOP concentrations. Our results have implications for the economics and development of dsRNA spray approaches for managing crop pests, in that multiple lower-concentration dsRNA spray treatments across crop growth stages may result in greater pest management efficacy, compared to single treatments using higher dsRNA concentrations. Furthermore, our results highlight the need for research into the development of RNAi cultivars for oilseed rape protection, given the enhanced RNAi efficacy resulting from chronic, compared to short-term, dsRNA feeding in B. aeneus. Jonathan Willow et al. use dsαCOP-treated anthers to examine RNAi efficacy against pollen beetle, a major pest of oilseed rape. The authors found that chronic feeding resulted in significantly greater mortality compared to short-term feeding; and significant silencing of αCOP was detected only in beetles chronically exposed to dsαCOP.
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15
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Paddock KJ, Robert CAM, Erb M, Hibbard BE. Western Corn Rootworm, Plant and Microbe Interactions: A Review and Prospects for New Management Tools. INSECTS 2021; 12:171. [PMID: 33671118 PMCID: PMC7922318 DOI: 10.3390/insects12020171] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/11/2021] [Accepted: 02/13/2021] [Indexed: 12/12/2022]
Abstract
The western corn rootworm, Diabrotica virgifera virgifera LeConte, is resistant to four separate classes of traditional insecticides, all Bacillius thuringiensis (Bt) toxins currently registered for commercial use, crop rotation, innate plant resistance factors, and even double-stranded RNA (dsRNA) targeting essential genes via environmental RNA interference (RNAi), which has not been sold commercially to date. Clearly, additional tools are needed as management options. In this review, we discuss the state-of-the-art knowledge about biotic factors influencing herbivore success, including host location and recognition, plant defensive traits, plant-microbe interactions, and herbivore-pathogens/predator interactions. We then translate this knowledge into potential new management tools and improved biological control.
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Affiliation(s)
- Kyle J. Paddock
- Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA;
| | - Christelle A. M. Robert
- Institute of Plant Sciences, University of Bern, 3013 Bern, Switzerland; (C.A.M.R.); (M.E.)
- Oeschger Centre for Climate Change Research, University of Bern, 3013 Bern, Switzerland
| | - Matthias Erb
- Institute of Plant Sciences, University of Bern, 3013 Bern, Switzerland; (C.A.M.R.); (M.E.)
- Oeschger Centre for Climate Change Research, University of Bern, 3013 Bern, Switzerland
| | - Bruce E. Hibbard
- Plant Genetics Research Unit, United States Department of Agriculture, Agricultural Research Service, Columbia, MO 65211, USA
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16
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Liu S, Sappington TW, Coates BS, Bonning BC. Nudivirus Sequences Identified from the Southern and Western Corn Rootworms (Coleoptera: Chrysomelidae). Viruses 2021; 13:v13020269. [PMID: 33572446 PMCID: PMC7916170 DOI: 10.3390/v13020269] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 01/08/2023] Open
Abstract
Analysis of pooled genomic short read sequence data revealed the presence of nudivirus-derived sequences from U.S. populations of both southern corn rootworm (SCR, Diabrotica undecimpunctata howardi Barber) and western corn rootworm (WCR, Diabrotica virgifera virgifera LeConte). A near complete nudivirus genome sequence was assembled from sequence data for an SCR population with relatively high viral titers. A total of 147,179 bp was assembled from five contigs that collectively encode 109 putative open reading frames (ORFs) including 20 nudivirus core genes. In contrast, genome sequence recovery was incomplete for a second nudivirus from WCR, although sequences derived from this virus were present in three geographically dispersed populations. Only 48,989 bp were assembled with 48 putative ORFs including 13 core genes, representing about 20% of a typical nudivirus genome. Phylogenetic analysis indicated that both corn rootworm nudiviruses grouped with the third known nudivirus of beetles, Oryctes rhinoceros nudivirus in the genus Alphanudivirus. On the basis of phylogenetic and additional analyses, we propose further taxonomic separation of nudiviruses within Alphanudivirus and Betanudivirus into two subfamilies and five genera. Identification of nudivirus-derived sequences from two species of corn rootworm highlights the diversity of viruses associated with these agricultural insect pests.
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Affiliation(s)
- Sijun Liu
- Department of Entomology, Iowa State University, Ames, IA 50011, USA;
| | - Thomas W. Sappington
- Corn Insects and Crop Genetics Research Unit, USDA-ARS, Ames, IA 50011, USA; (T.W.S.); (B.S.C.)
| | - Brad S. Coates
- Corn Insects and Crop Genetics Research Unit, USDA-ARS, Ames, IA 50011, USA; (T.W.S.); (B.S.C.)
| | - Bryony C. Bonning
- Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA
- Correspondence:
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Yang C, Ou D, Guo W, Lü J, Guo C, Qiu B, Pan H. De Novo Assembly of the Asian Citrus Psyllid Diaphorina citri (Hemiptera: Psyllidae) Transcriptome across Developmental Stages. Int J Mol Sci 2020; 21:ijms21144974. [PMID: 32674498 PMCID: PMC7404022 DOI: 10.3390/ijms21144974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/09/2020] [Accepted: 07/12/2020] [Indexed: 11/16/2022] Open
Abstract
Asian citrus psyllid Diaphorina citri Kuwayama is an important economic pest of citrus, as it transmits Candidatus Liberibacter asiaticus, the causative agent of huanglongbing. In this study, we used RNA-seq to identify novel genes and provide the first high-resolution view of the of D. citri transcriptome throughout development. The transcriptomes of D. citri during eight developmental stages, including the egg, five instars, and male and female adults were sequenced. In total, 115 million clean reads were obtained and assembled into 354,726 unigenes with an average length of 925.65 bp and an N50 length of 1733 bp. Clusters of Orthologous Groups, Gene Ontology, and Kyoto Encyclopedia of Genes and Genomes analyses were conducted to functionally annotate the genes. Differential expression analysis highlighted developmental stage-specific expression patterns. Furthermore, two trehalase genes were characterized with lower expression in adults compared to that in the other stages. The RNA interference (RNAi)-mediated suppression of the two trehalase genes resulted in significantly high D. citri mortality. This study enriched the genomic information regarding D. citri. Importantly, these data represent the most comprehensive transcriptomic resource currently available for D. citri and will facilitate functional genomics studies of this notorious pest.
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Affiliation(s)
- Chunxiao Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China;
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Da Ou
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
| | - Wei Guo
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
| | - Jing Lü
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
| | - Changfei Guo
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
| | - Baoli Qiu
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
- Correspondence: (B.Q.); (H.P.)
| | - Huipeng Pan
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China; (D.O.); (W.G.); (J.L.); (C.G.)
- Correspondence: (B.Q.); (H.P.)
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Christiaens O, Whyard S, Vélez AM, Smagghe G. Double-Stranded RNA Technology to Control Insect Pests: Current Status and Challenges. FRONTIERS IN PLANT SCIENCE 2020; 11:451. [PMID: 32373146 PMCID: PMC7187958 DOI: 10.3389/fpls.2020.00451] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 03/26/2020] [Indexed: 05/21/2023]
Abstract
Exploiting the RNA interference (RNAi) gene mechanism to silence essential genes in pest insects, leading to toxic effects, has surfaced as a promising new control strategy in the past decade. While the first commercial RNAi-based products are currently coming to market, the application against a wide range of insect species is still hindered by a number of challenges. In this review, we discuss the current status of these RNAi-based products and the different delivery strategies by which insects can be targeted by the RNAi-triggering double-stranded RNA (dsRNA) molecules. Furthermore, this review also addresses a number of physiological and cellular barriers, which can lead to decreased RNAi efficacy in insects. Finally, novel non-transgenic delivery technologies, such as polymer or liposomic nanoparticles, peptide-based delivery vehicles and viral-like particles, are also discussed, as these could overcome these barriers and lead to effective RNAi-based pest control.
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Affiliation(s)
| | - Steve Whyard
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Ana M. Vélez
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Guy Smagghe
- Department of Plants and Crops, Ghent University, Ghent, Belgium
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