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Wang Y, Li X, Zhu C, Yi S, Zhang Y, Hong Z. Plant-derived artificial miRNA effectively reduced the proliferation of aphid (Aphidoidea) through spray-induced gene silencing. PEST MANAGEMENT SCIENCE 2024; 80:4322-4332. [PMID: 38647144 DOI: 10.1002/ps.8138] [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: 11/20/2023] [Revised: 04/02/2024] [Accepted: 04/22/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Aphids (Hemiptera: Aphididae) are notorious sap-sucking insects that rampantly threaten agricultural production worldwide. Current management against aphids in the field heavily relies on chemical pesticides, which makes economical and eco-friendly methods urgently needed. Spray-induced gene silencing (SIGS) offers a powerful and precise approach to pest management. However, the high costs and instability of double-stranded RNA (dsRNA) regulators applied for downstream RNA interference (RNAi) still limit this strategy. It remains uncertain if RNAi regulators applied in SIGS could extend to small RNA (sRNA), especially miRNA. RESULTS We chose two sRNA sequences, miR-9b and miR-VgR, whose corresponding targets ABCG4 and VgR are both essential for aphid growth and development. The efficacy of these sequences was initially verified by chemically synthetic single-stranded RNA (syn-ssRNA). Through spray treatment, we observed a significantly decreased survival number and increased abnormality rate of green peach aphids fed on the host under laboratory conditions. Based on our previous study, we generated transgenic plants expressing artificial miR-9b (amiR-9b) and miR-VgR (amiR-VgR). Remarkably, plant-derived amiRNA exerted potent and long-lasting inhibitory efficacy with merely one percent concentration of chemical synthetics. Notably, the simultaneous application of amiR-9b and amiR-VgR exhibited superior inhibitory efficacy. CONCLUSION We explored the potential use of sRNA-based biopesticide through SIGS while investigating the dosage requirements. To optimize this strategy, the utilization of plant-derived amiRNA was proposed. The results suggested that attributed to stability and durability, deploying amiRNA in pest management is a potential and promising solution for the field application. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Yuan Wang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Xuanlin Li
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Chenghong Zhu
- State Key Laboratory of Analytical Chemistry for Life Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Chemistry, and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, China
| | - Shijie Yi
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Yan Zhang
- State Key Laboratory of Analytical Chemistry for Life Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Chemistry, and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, China
| | - Zhi Hong
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
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Ortolá B, Daròs JA. RNA Interference in Insects: From a Natural Mechanism of Gene Expression Regulation to a Biotechnological Crop Protection Promise. BIOLOGY 2024; 13:137. [PMID: 38534407 DOI: 10.3390/biology13030137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/14/2024] [Accepted: 02/19/2024] [Indexed: 03/28/2024]
Abstract
Insect pests rank among the major limiting factors in agricultural production worldwide. In addition to direct effect on crops, some phytophagous insects are efficient vectors for plant disease transmission. Large amounts of conventional insecticides are required to secure food production worldwide, with a high impact on the economy and environment, particularly when beneficial insects are also affected by chemicals that frequently lack the desired specificity. RNA interference (RNAi) is a natural mechanism gene expression regulation and protection against exogenous and endogenous genetic elements present in most eukaryotes, including insects. Molecules of double-stranded RNA (dsRNA) or highly structured RNA are the substrates of cellular enzymes to produce several types of small RNAs (sRNAs), which play a crucial role in targeting sequences for transcriptional or post-transcriptional gene silencing. The relatively simple rules that underlie RNAi regulation, mainly based in Watson-Crick complementarity, have facilitated biotechnological applications based on these cellular mechanisms. This includes the promise of using engineered dsRNA molecules, either endogenously produced in crop plants or exogenously synthesized and applied onto crops, as a new generation of highly specific, sustainable, and environmentally friendly insecticides. Fueled on this expectation, this article reviews current knowledge about the RNAi pathways in insects, and some other applied questions such as production and delivery of recombinant RNA, which are critical to establish RNAi as a reliable technology for insect control in crop plants.
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Affiliation(s)
- Beltrán Ortolá
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de València, 46022 Valencia, Spain
| | - José-Antonio Daròs
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de València, 46022 Valencia, Spain
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Ye C, An X, Xie BQ, Ding BY, Niu J, Wang JJ. The involvement of systemic RNA interference deficient-1-like (SIL1) in cellular dsRNA uptake in Acyrthosiphon pisum. INSECT SCIENCE 2023; 30:1393-1404. [PMID: 36576078 DOI: 10.1111/1744-7917.13167] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Systemic RNA interference deficient-1-like (SIL1) is considered a core component in dsRNA uptake in some insect species. Investigation related to the potential function of SIL1 in dsRNA uptake can contribute to a further understanding of RNA interference (RNAi) mechanisms in insects and agricultural pest control. However, the role of SIL1 in dsRNA uptake in insects such as aphids remains controversial. We have thoroughly analyzed the role of SIL1 from the model aphid Acyrthosiphon pisum (ApSIL1) in cellular dsRNA to clarify its function. First, the induced expression of ApSIL1 upon dsRNA oral exposure provided a vital clue for the possible involvement of ApSIL1 in cellular dsRNA uptake. Subsequent in vivo experiments using the RNAi-of-RNAi approach for ApSIL1 supported our hypothesis that the silencing efficiencies of reporter genes were reduced after inhibition of ApSIL1 expression. The impaired biological phenotypes of aphids, including cumulative average offspring, deformities of the nymph, and mortality upon pathogen infection, were then observed in the treatment group. Thereafter, in vitro dual-luciferase reporter assay showed compelling evidence that the luciferin signal was significantly attenuated when dsluciferase or dsGFP was transferred into ApSIL1-transfected Drosophila S2 cells. These observations further confirmed that the signal of Cy3-labeled dsRNA was rapidly attenuated with time in ApSIL1-transfected Drosophila S2 cells. Overall, these findings conclusively establish that ApSIL1 is involved in dsRNA uptake in A. pisum.
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Affiliation(s)
- Chao Ye
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Xin An
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Bing-Qin Xie
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Bi-Yue Ding
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Jinzhi Niu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
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Yao Z, Jin H, Li C, Ma W, Zhang W, Lin Y. Knockdown of Dcr1 and Dcr2 limits the lethal effect of C-factor in Chilo suppressalis. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2023; 113:e22004. [PMID: 36780173 DOI: 10.1002/arch.22004] [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: 12/14/2022] [Revised: 01/13/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Dicer is a highly conserved ribonuclease in evolution. It belongs to the RNase III family and can specifically recognize and cleave double-stranded RNA (dsRNA). In this study, the genome and transcriptome of Chilo suppressalis were analyzed, and it was found that there were two members in the Dicer family, named Dcr1 and Dcr2. The dsRNAs of Dcr1 and Dcr2 genes were synthesized and fed to C. suppressalis larvae. The C-factor of C. suppressalis was selected as the marker gene. The results showed that both Dcr1 and Dcr2 genes were significantly knocked down. The larval mortality was significantly reduced by 43.50% (p < 0.05) after feeding on dsC-factor and dsDcr1. The transcription levels of C-factor genes were significantly increased by 33.95% (p < 0.05) and 32.94% (p < 0.05) when the larvae fed with dsDcr2 + dsC-factor for 72 h and 96 h, respectively. Furthermore, the mortality was significantly decreased by 79% (p < 0.05) after feeding dsC-factor and dsDcr2. These findings imply that Dcr1 can decrease the lethal effect of C-factor gene but cannot affect its RNAi efficiency and Dcr2 can decrease the lethal effect of C-factor gene by inhibiting RNAi efficiency.
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Affiliation(s)
- Zhuotian Yao
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Huihui Jin
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Changyan Li
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Weihua Ma
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Wei Zhang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
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Elston KM, Maeda GP, Perreau J, Barrick JE. Addressing the challenges of symbiont-mediated RNAi in aphids. PeerJ 2023; 11:e14961. [PMID: 36874963 PMCID: PMC9983426 DOI: 10.7717/peerj.14961] [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: 09/20/2022] [Accepted: 02/05/2023] [Indexed: 03/06/2023] Open
Abstract
Because aphids are global agricultural pests and models for bacterial endosymbiosis, there is a need for reliable methods to study and control their gene function. However, current methods available for aphid gene knockout and knockdown of gene expression are often unreliable and time consuming. Techniques like CRISPR-Cas genome editing can take several months to achieve a single gene knockout because they rely on aphids going through a cycle of sexual reproduction, and aphids often lack strong, consistent levels of knockdown when fed or injected with molecules that induce an RNA interference (RNAi) response. In the hopes of addressing these challenges, we attempted to adapt a new method called symbiont-mediated RNAi (smRNAi) for use in aphids. smRNAi involves engineering a bacterial symbiont of the insect to continuously supply double-stranded RNA (dsRNA) inside the insect body. This approach has been successful in thrips, kissing bugs, and honeybees. We engineered the laboratory Escherichia coli strain HT115 and the native aphid symbiont Serratia symbiotica CWBI-2.3T to produce dsRNA inside the gut of the pea aphid (Acyrthosiphon pisum) targeting salivary effector protein (C002) or ecdysone receptor genes. For C002 assays, we also tested co-knockdown with an aphid nuclease (Nuc1) to reduce RNA degradation. However, we found that smRNAi was not a reliable method for aphid gene knockdown under our conditions. We were unable to consistently achieve the expected phenotypic changes with either target. However, we did see indications that elements of the RNAi pathway were modestly upregulated, and expression of some targeted genes appeared to be somewhat reduced in some trials. We conclude with a discussion of the possible avenues through which smRNAi, and aphid RNAi in general, could be improved in the future.
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Affiliation(s)
- Katherine M Elston
- Department of Molecular Biosciences, The University of Texas, Austin, Texas, United States
| | - Gerald P Maeda
- Department of Integrative Biology, The University of Texas, Austin, Texas, United States
| | - Julie Perreau
- Department of Molecular Biosciences, The University of Texas, Austin, Texas, United States.,Department of Integrative Biology, The University of Texas, Austin, Texas, United States
| | - Jeffrey E Barrick
- Department of Molecular Biosciences, The University of Texas, Austin, Texas, United States
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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: 0.5] [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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7
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Dalaisón-Fuentes LI, Pascual A, Gazza E, Welchen E, Rivera-Pomar R, Catalano MI. Development of efficient RNAi methods in the corn leafhopper Dalbulus maidis, a promising application for pest control. PEST MANAGEMENT SCIENCE 2022; 78:3108-3116. [PMID: 35442515 DOI: 10.1002/ps.6937] [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: 12/14/2021] [Revised: 04/13/2022] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND The corn leafhopper Dalbulus maidis is the main vector of important stunting pathogens that affect maize production. Currently, there are no effective methods available to manage this pest without adverse impact on the environment. In this context, genomic-based technologies such as RNA interference (RNAi) provide a more environmentally friendly pest control strategy. Therefore, we aimed to assess the application of RNAi in D. maidis and determine the function of a candidate gene related to insect reproduction and propagation. RESULTS We have characterized the core RNAi genes and evaluated the functionality of the RNAi machinery. We assessed the potential of RNAi technology in D. maidis via injection or ingestion of double-stranded RNA (dsRNA) to adult females. We chose Bicaudal C (BicC) as a target gene due to its important role during insect oogenesis. Administration of dsRNABicC caused significant reductions in the transcript levels (fold changes up to 170 times) and ovipositions. Phenotypic analysis of the ovaries revealed alterations in oocyte development, providing additional confirmation for our results and supporting the idea that Dmai-BicC is a key player of D. maidis oogenesis. CONCLUSION This is, to our knowledge, the first report of efficient RNAi in D. maidis. We believe our findings provide a starting point for future control strategies against one of the most important maize pests in the Americas. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Lucía Inés Dalaisón-Fuentes
- Centro de BioInvestigaciones (Universidad Nacional del Noroeste de la Provincia de Buenos Aires-CICBA), Pergamino, Argentina
- Centro de Investigaciones y Transferencias del Noroeste de la provincia de Buenos Aires (CITNOBA-CONICET), Pergamino, Argentina
| | - Agustina Pascual
- Centro de BioInvestigaciones (Universidad Nacional del Noroeste de la Provincia de Buenos Aires-CICBA), Pergamino, Argentina
- Centro de Investigaciones y Transferencias del Noroeste de la provincia de Buenos Aires (CITNOBA-CONICET), Pergamino, Argentina
| | - Elías Gazza
- Centro de BioInvestigaciones (Universidad Nacional del Noroeste de la Provincia de Buenos Aires-CICBA), Pergamino, Argentina
- Centro de Investigaciones y Transferencias del Noroeste de la provincia de Buenos Aires (CITNOBA-CONICET), Pergamino, Argentina
| | - Elina Welchen
- Instituto de Agrobiotecnología del Litoral (CONICET-UNL), Cátedra de Biología Celular y Molecular, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Rolando Rivera-Pomar
- Centro de BioInvestigaciones (Universidad Nacional del Noroeste de la Provincia de Buenos Aires-CICBA), Pergamino, Argentina
- Centro de Investigaciones y Transferencias del Noroeste de la provincia de Buenos Aires (CITNOBA-CONICET), Pergamino, Argentina
- Centro Regional de Estudios Genómicos (Facultad de Ciencias Exactas, Universidad Nacional de La Plata), La Plata, Argentina
| | - María Inés Catalano
- Centro de BioInvestigaciones (Universidad Nacional del Noroeste de la Provincia de Buenos Aires-CICBA), Pergamino, Argentina
- Centro de Investigaciones y Transferencias del Noroeste de la provincia de Buenos Aires (CITNOBA-CONICET), Pergamino, Argentina
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Touzdjian Pinheiro Kohlrausch Távora F, de Assis dos Santos Diniz F, de Moraes Rêgo-Machado C, Chagas Freitas N, Barbosa Monteiro Arraes F, Chumbinho de Andrade E, Furtado LL, Osiro KO, Lima de Sousa N, Cardoso TB, Márcia Mertz Henning L, Abrão de Oliveira Molinari P, Feingold SE, Hunter WB, Fátima Grossi de Sá M, Kobayashi AK, Lima Nepomuceno A, Santiago TR, Correa Molinari HB. CRISPR/Cas- and Topical RNAi-Based Technologies for Crop Management and Improvement: Reviewing the Risk Assessment and Challenges Towards a More Sustainable Agriculture. Front Bioeng Biotechnol 2022; 10:913728. [PMID: 35837551 PMCID: PMC9274005 DOI: 10.3389/fbioe.2022.913728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated gene (Cas) system and RNA interference (RNAi)-based non-transgenic approaches are powerful technologies capable of revolutionizing plant research and breeding. In recent years, the use of these modern technologies has been explored in various sectors of agriculture, introducing or improving important agronomic traits in plant crops, such as increased yield, nutritional quality, abiotic- and, mostly, biotic-stress resistance. However, the limitations of each technique, public perception, and regulatory aspects are hindering its wide adoption for the development of new crop varieties or products. In an attempt to reverse these mishaps, scientists have been researching alternatives to increase the specificity, uptake, and stability of the CRISPR and RNAi system components in the target organism, as well as to reduce the chance of toxicity in nontarget organisms to minimize environmental risk, health problems, and regulatory issues. In this review, we discuss several aspects related to risk assessment, toxicity, and advances in the use of CRISPR/Cas and topical RNAi-based technologies in crop management and breeding. The present study also highlights the advantages and possible drawbacks of each technology, provides a brief overview of how to circumvent the off-target occurrence, the strategies to increase on-target specificity, the harm/benefits of association with nanotechnology, the public perception of the available techniques, worldwide regulatory frameworks regarding topical RNAi and CRISPR technologies, and, lastly, presents successful case studies of biotechnological solutions derived from both technologies, raising potential challenges to reach the market and being social and environmentally safe.
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Affiliation(s)
| | | | | | | | | | | | | | - Karen Ofuji Osiro
- Department of Phytopathology, University of Brasília, Brasília, Brazil
- Embrapa Agroenergy, Brasília, Brazil
| | | | | | | | | | | | - Wayne B. Hunter
- USDA-ARS, U.S. Horticultural Research Laboratory, Fort Pierce, FL, United States
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Joshi I, Kohli D, Pal A, Chaudhury A, Sirohi A, Jain PK. Host delivered-RNAi of effector genes for imparting resistance against root-knot and cyst nematodes in plants. PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY 2022; 118:101802. [DOI: 10.1016/j.pmpp.2022.101802] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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Dhatwalia D, Aminedi R, Kalia V, Pande V, Bhattacharya R. Host-mediated attenuation of gut sucrase in mustard aphid Lipaphis erysimi impaired its parthenogenetic reproduction on Indian mustard Brassica juncea. PEST MANAGEMENT SCIENCE 2022; 78:803-811. [PMID: 34713547 DOI: 10.1002/ps.6694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/25/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND The nefarious hemipteran mustard aphid (Lipaphis erysimi) inflicts colossal yield losses in Brassica crops including Indian mustard (Brassica juncea). Lack of an accessible resistance source has been the primary impediment in breeding varietal resistance against aphids. In recent years, in planta RNAi-mediated resistance has been demonstrated in model plants as a potential tool for protection against insect pests. However, translational application in crop species is imperative for critical assessment of this technology in breeding effective resistance. RESULTS The essential role of sucrase 1 (SUC1) in mitigating osmotic pressure imposed by sucrose-rich phloem sap inside the insect gut is corroborated by its expression pattern in L. erysimi. Transgenic lines of Indian mustard were developed expressing SUC1 hairpin RNA for its host-mediated delivery into the infesting aphids. The expression of the dsRNA encoding cassette, and generation of siRNA molecules in transgenic B. juncea lines were verified by quantitative reverse transcription (RT)-PCR, stem-loop RT-PCR and Northern hybridization. Rearing of L. erysimi on the transgenic lines resulted in 22-40% reduction in aphid fecundity. The observed retardation in aphid reproduction was coherent with the detection of SUC1-specific siRNA molecules and attenuation of the SUC1 transcript level in L. erysimi fed on the transgenic lines. CONCLUSION Augmenting varietal resistance can substantially reduce usage of toxic agrochemicals in crop protection. This attempt was the first successful demonstration of host-mediated RNAi of an aphid gene in any Brassica crop. It paves the way for more rigorous attempt of engineering RNAi-based resistance against aphids in Brassica crops. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Deepa Dhatwalia
- ICAR-National Institute for Plant Biotechnology, New Delhi, India
- Department of Biotechnology, Kumaun University, Nainital, India
| | | | - Vinay Kalia
- Division of Entomology, Indian Agricultural Research Institute, New Delhi, India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Nainital, India
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Bao W, Li A, Zhang Y, Diao P, Zhao Q, Yan T, Zhou Z, Duan H, Li X, Wuriyanghan H. Improvement of host-induced gene silencing efficiency via polycistronic-tRNA-amiR expression for multiple target genes and characterization of RNAi mechanism in Mythimna separata. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1370-1385. [PMID: 33484609 PMCID: PMC8313139 DOI: 10.1111/pbi.13555] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 01/08/2021] [Accepted: 01/12/2021] [Indexed: 05/09/2023]
Abstract
Host-induced gene silencing (HIGS) emerged as a new strategy for pest control. However, RNAi efficiency is reported to be low in Lepidoptera, which are composed of many important crop pests. To address this, we generated transgenic plants to develop HIGS effects in a maize pest, Mythimna separata (Lepidoptera, Noctuidae), by targeting chitinase encoding genes. More importantly, we developed an artificial microRNA (amiR) based PTA (polycistronic-tRNA-amiR) system for silencing multiple target genes. Compared with hpRNA (hairpin RNA), transgenic expression of a PTA cassette including an amiR for the gut-specific dsRNA nuclease gene MsREase, resulted in improved knockdown efficiency and caused more pronounced developmental abnormalities in recipient insects. When target gene siRNAs were analysed after HIGS and direct dsRNA/siRNA feeding, common features such as sense polarity and siRNA hotspot regions were observed, however, they differed in siRNA transitivity and major 20-24nt siRNA species. Core RNAi genes were identified in M. separata, and biochemical activities of MsAGO2, MsSID1 and MsDcr2 were confirmed by EMSA (electrophoretic mobility shift assay) and dsRNA cleavage assays, respectively. Taken together, we provide compelling evidence for the existence of the RNAi mechanism in M. separata by analysis of both siRNA signatures and RNAi machinery components, and the PTA system could potentially be useful for future RNAi control of lepidopteran pests.
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Affiliation(s)
- Wenhua Bao
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Aoga Li
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Yanan Zhang
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Pengfei Diao
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Qiqi Zhao
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Ting Yan
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Zikai Zhou
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Huimin Duan
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
| | - Xugang Li
- Sino‐German Joint Research Center on Agricultural BiologyState Key Laboratory of Crop Biology, College of Life SciencesShandong Agricultural UniversityTai'anChina
| | - Hada Wuriyanghan
- Key Laboratory of Forage and Endemic Crop BiotechnologyMinistry of EducationSchool of Life SciencesInner Mongolia UniversityHohhotChina
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Ye C, Hu XS, Wang ZW, Wei D, Smagghe G, Christiaens O, Niu J, Wang JJ. Involvement of clathrin-dependent endocytosis in cellular dsRNA uptake in aphids. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2021; 132:103557. [PMID: 33639241 DOI: 10.1016/j.ibmb.2021.103557] [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: 12/25/2020] [Revised: 02/14/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
RNAi is an essential technology for studying gene function in eukaryotes, and is also considered to be a potential strategy for pest control. However, the mechanism behind the cellular uptake of dsRNA in aphids, a group of important agricultural sucking pests, remains unknown. Here, using the pea aphid Acyrthosiphon pisum as model for aphids, we identified two core genes of clathrin-dependent endocytosis (CDE), Apchc and Apvha16. We confirmed that expression of Apchc, Apvha16 and RNAi core component genes (ApAgo2, ApDcr2 and ApR2d2) were simultaneously induced at 12 h after feeding dsRNA. By using an RNAi-of-RNAi approach, we demonstrated that suppression of Apchc and Apvha16 transcripts by RNAi significantly impaired RNAi efficiency of selected reporter genes (RGs), including ApGNBP1, Apmts and Aphb, suggesting the involvement of CDE in cellular dsRNA uptake in aphids. Further confirmation was also provided using two inhibitors, chlorpromazine (CPZ) and bafilomycin A1 (BafA1). Administration of CPZ and of BafA1 both led to an impaired silencing efficiency of the RGs in the pea aphid. Finally, these RNAi-of-RNAi results were reconfirmed in the peach aphid Myzus persicae. Taking these findings together, we conclude that CDE is involved in cellular dsRNA uptake in aphids.
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Affiliation(s)
- Chao Ye
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China.
| | - Xiu-Shan Hu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China.
| | - Zheng-Wu Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China.
| | - Dong Wei
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China.
| | - Guy Smagghe
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China; Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
| | - Olivier Christiaens
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
| | - Jinzhi Niu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China.
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China; International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control, Academy of Agricultural Sciences, Southwest University, Chongqing, China.
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Wytinck N, Manchur CL, Li VH, Whyard S, Belmonte MF. dsRNA Uptake in Plant Pests and Pathogens: Insights into RNAi-Based Insect and Fungal Control Technology. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1780. [PMID: 33339102 PMCID: PMC7765514 DOI: 10.3390/plants9121780] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/07/2020] [Accepted: 12/13/2020] [Indexed: 12/11/2022]
Abstract
Efforts to develop more environmentally friendly alternatives to traditional broad-spectrum pesticides in agriculture have recently turned to RNA interference (RNAi) technology. With the built-in, sequence-specific knockdown of gene targets following delivery of double-stranded RNA (dsRNA), RNAi offers the promise of controlling pests and pathogens without adversely affecting non-target species. Significant advances in the efficacy of this technology have been observed in a wide range of species, including many insect pests and fungal pathogens. Two different dsRNA application methods are being developed. First, host induced gene silencing (HIGS) harnesses dsRNA production through the thoughtful and precise engineering of transgenic plants and second, spray induced gene silencing (SIGS) that uses surface applications of a topically applied dsRNA molecule. Regardless of the dsRNA delivery method, one aspect that is critical to the success of RNAi is the ability of the target organism to internalize the dsRNA and take advantage of the host RNAi cellular machinery. The efficiency of dsRNA uptake mechanisms varies across species, and in some uptake is negligible, rendering them effectively resistant to this new generation of control technologies. If RNAi-based methods of control are to be used widely, it is critically important to understand the mechanisms underpinning dsRNA uptake. Understanding dsRNA uptake mechanisms will also provide insight into the design and formulation of dsRNAs for improved delivery and provide clues into the development of potential host resistance to these technologies.
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Affiliation(s)
| | | | | | | | - Mark F. Belmonte
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (N.W.); (C.L.M.); (V.H.L.); (S.W.)
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Jain RG, Robinson KE, Fletcher SJ, Mitter N. RNAi-Based Functional Genomics in Hemiptera. INSECTS 2020; 11:E557. [PMID: 32825516 PMCID: PMC7564473 DOI: 10.3390/insects11090557] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 01/05/2023]
Abstract
RNA interference (RNAi) is a powerful approach for sequence-specific gene silencing, displaying tremendous potential for functional genomics studies in hemipteran insects. Exploiting RNAi allows the biological roles of critical genes to be defined and aids the development of RNAi-based biopesticides. In this review, we provide context to the rapidly expanding field of RNAi-based functional genomics studies in hemipteran insects. We highlight the most widely used RNAi delivery strategies, including microinjection, oral ingestion and topical application. Additionally, we discuss the key variables affecting RNAi efficacy in hemipteran insects, including insect life-stage, gene selection, the presence of nucleases, and the role of core RNAi machinery. In conclusion, we summarise the application of RNAi in functional genomics studies in Hemiptera, focusing on genes involved in reproduction, behaviour, metabolism, immunity and chemical resistance across 33 species belonging to 14 families.
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Affiliation(s)
| | - Karl E. Robinson
- Queensland Alliance for Agriculture and Food Innovation, Centre for Horticultural Sciences, The University of Queensland, Brisbane 4072, Queensland, Australia; (R.G.J.); (S.J.F.); (N.M.)
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15
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Tian L, Zeng Y, Xie W, Wu Q, Wang S, Zhou X, Zhang Y. Genome-wide identification and analysis of genes associated with RNA interference in Bemisia tabaci. PEST MANAGEMENT SCIENCE 2019; 75:3005-3014. [PMID: 30891929 DOI: 10.1002/ps.5415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 03/10/2019] [Accepted: 03/16/2019] [Indexed: 05/14/2023]
Abstract
BACKGROUND As a method of RNA-mediated gene silencing, RNA interference (RNAi) is a useful reverse genetic tool with which to study gene function, and holds great promise for pest management. Bemisia tabaci is a cosmopolitan pest that causes extensive damage to crops. The mechanism underlying RNAi efficiency in B. tabaci is not well known. We identified and analyzed candidate genes in the RNAi pathway to understand the RNAi mechanism and provide a basis for the application of RNAi in pest management. RESULTS We identified 33 genes putatively involved in the RNAi pathway from the B. tabaci Q genome. Phylogenetic and structural analyses confirmed the characteristics of these genes. Furthermore, quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) and transcriptomic analysis profiled gene expression patterns during different developmental stages. Gene expression levels estimated by qRT-PCR and RNA-seq analyses were significantly correlated. Moreover, gene functions were verified by RNAi. When accompanied by knockdown of AGO2, Dicer2 and Sid1, the efficiency of CYP6DB3 RNAi decreased correspondingly. CONCLUSION In this study, we annotated and validated genes involved in B. tabaci RNAi. A better understanding of the building blocks of the RNAi process in B. tabaci facilitates integration of this novel biotechnology into the management of this emerging pest, either directly or indirectly. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Lixia Tian
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yang Zeng
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wen Xie
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qingjun Wu
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shaoli Wang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xuguo Zhou
- Department of Entomology, University of Kentucky, Lexington, KY, USA
| | - Youjun Zhang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
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16
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Panfilio KA, Vargas Jentzsch IM, Benoit JB, Erezyilmaz D, Suzuki Y, Colella S, Robertson HM, Poelchau MF, Waterhouse RM, Ioannidis P, Weirauch MT, Hughes DST, Murali SC, Werren JH, Jacobs CGC, Duncan EJ, Armisén D, Vreede BMI, Baa-Puyoulet P, Berger CS, Chang CC, Chao H, Chen MJM, Chen YT, Childers CP, Chipman AD, Cridge AG, Crumière AJJ, Dearden PK, Didion EM, Dinh H, Doddapaneni HV, Dolan A, Dugan S, Extavour CG, Febvay G, Friedrich M, Ginzburg N, Han Y, Heger P, Holmes CJ, Horn T, Hsiao YM, Jennings EC, Johnston JS, Jones TE, Jones JW, Khila A, Koelzer S, Kovacova V, Leask M, Lee SL, Lee CY, Lovegrove MR, Lu HL, Lu Y, Moore PJ, Munoz-Torres MC, Muzny DM, Palli SR, Parisot N, Pick L, Porter ML, Qu J, Refki PN, Richter R, Rivera-Pomar R, Rosendale AJ, Roth S, Sachs L, Santos ME, Seibert J, Sghaier E, Shukla JN, Stancliffe RJ, Tidswell O, Traverso L, van der Zee M, Viala S, Worley KC, Zdobnov EM, Gibbs RA, Richards S. Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome. Genome Biol 2019. [PMID: 30935422 DOI: 10.1101/201731] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023] Open
Abstract
BACKGROUND The Hemiptera (aphids, cicadas, and true bugs) are a key insect order, with high diversity for feeding ecology and excellent experimental tractability for molecular genetics. Building upon recent sequencing of hemipteran pests such as phloem-feeding aphids and blood-feeding bed bugs, we present the genome sequence and comparative analyses centered on the milkweed bug Oncopeltus fasciatus, a seed feeder of the family Lygaeidae. RESULTS The 926-Mb Oncopeltus genome is well represented by the current assembly and official gene set. We use our genomic and RNA-seq data not only to characterize the protein-coding gene repertoire and perform isoform-specific RNAi, but also to elucidate patterns of molecular evolution and physiology. We find ongoing, lineage-specific expansion and diversification of repressive C2H2 zinc finger proteins. The discovery of intron gain and turnover specific to the Hemiptera also prompted the evaluation of lineage and genome size as predictors of gene structure evolution. Furthermore, we identify enzymatic gains and losses that correlate with feeding biology, particularly for reductions associated with derived, fluid nutrition feeding. CONCLUSIONS With the milkweed bug, we now have a critical mass of sequenced species for a hemimetabolous insect order and close outgroup to the Holometabola, substantially improving the diversity of insect genomics. We thereby define commonalities among the Hemiptera and delve into how hemipteran genomes reflect distinct feeding ecologies. Given Oncopeltus's strength as an experimental model, these new sequence resources bolster the foundation for molecular research and highlight technical considerations for the analysis of medium-sized invertebrate genomes.
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Affiliation(s)
- Kristen A Panfilio
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany.
- School of Life Sciences, University of Warwick, Gibbet Hill Campus, Coventry, CV4 7AL, UK.
| | - Iris M Vargas Jentzsch
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Joshua B Benoit
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Deniz Erezyilmaz
- Department of Biochemistry and Cell Biology and Center for Developmental Genetics, Stony Brook University, Stony Brook, NY, 11794, USA
- Present address: Department of Physiology, Anatomy and Genetics and Centre for Neural Circuits and Behaviour, University of Oxford, Oxford, OX1 3SR, UK
| | - Yuichiro Suzuki
- Department of Biological Sciences, Wellesley College, 106 Central St., Wellesley, MA, 02481, USA
| | - Stefano Colella
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
- Present address: LSTM, Laboratoire des Symbioses Tropicales et Méditerranéennes, INRA, IRD, CIRAD, SupAgro, University of Montpellier, Montpellier, France
| | - Hugh M Robertson
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | | | - Robert M Waterhouse
- Department of Genetic Medicine and Development and Swiss Institute of Bioinformatics, University of Geneva, 1211, Geneva, Switzerland
- Present address: Department of Ecology and Evolution, University of Lausanne, 1015, Lausanne, Switzerland
| | - Panagiotis Ioannidis
- Department of Genetic Medicine and Development and Swiss Institute of Bioinformatics, University of Geneva, 1211, Geneva, Switzerland
| | - Matthew T Weirauch
- Center for Autoimmune Genomics and Etiology, Division of Biomedical Informatics, and Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, 45229, USA
| | - Daniel S T Hughes
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Shwetha C Murali
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
- Present address: Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
- Present address: Howard Hughes Medical Institute, University of Washington, Seattle, WA, 98195, USA
| | - John H Werren
- Department of Biology, University of Rochester, Rochester, NY, 14627, USA
| | - Chris G C Jacobs
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, Netherlands
- Max Planck Institute for Chemical Ecology, Hans-Knöll Strasse 8, 07745, Jena, Germany
| | - Elizabeth J Duncan
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - David Armisén
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Barbara M I Vreede
- Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel
| | | | - Chloé S Berger
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Chun-Che Chang
- Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Hsu Chao
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Mei-Ju M Chen
- National Agricultural Library, Beltsville, MD, 20705, USA
| | - Yen-Ta Chen
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | | | - Ariel D Chipman
- Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel
| | - Andrew G Cridge
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Antonin J J Crumière
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Peter K Dearden
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Elise M Didion
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Huyen Dinh
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Harsha Vardhan Doddapaneni
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Amanda Dolan
- Department of Biology, University of Rochester, Rochester, NY, 14627, USA
- Present address: School of Life Sciences, Rochester Institute of Technology, Rochester, NY, 14623, USA
| | - Shannon Dugan
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Cassandra G Extavour
- Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA, 02138, USA
- Department of Molecular and Cellular Biology, Harvard University, 26 Oxford Street, Cambridge, MA, 02138, USA
| | - Gérard Febvay
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Markus Friedrich
- Department of Biological Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Neta Ginzburg
- Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel
| | - Yi Han
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Peter Heger
- Institute for Genetics, University of Cologne, Zülpicher Straße 47a, 50674, Cologne, Germany
| | - Christopher J Holmes
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Thorsten Horn
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Yi-Min Hsiao
- Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Emily C Jennings
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - J Spencer Johnston
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA
| | - Tamsin E Jones
- Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA, 02138, USA
| | - Jeffery W Jones
- Department of Biological Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Abderrahman Khila
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Stefan Koelzer
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | | | - Megan Leask
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Sandra L Lee
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Chien-Yueh Lee
- National Agricultural Library, Beltsville, MD, 20705, USA
| | - Mackenzie R Lovegrove
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Hsiao-Ling Lu
- Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Yong Lu
- Department of Entomology and Program in Molecular & Cell Biology, University of Maryland, College Park, MD, 20742, USA
| | - Patricia J Moore
- Department of Entomology, University of Georgia, 120 Cedar St., Athens, GA, 30602, USA
| | - Monica C Munoz-Torres
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Donna M Muzny
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Subba R Palli
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
| | - Nicolas Parisot
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Leslie Pick
- Department of Entomology and Program in Molecular & Cell Biology, University of Maryland, College Park, MD, 20742, USA
| | - Megan L Porter
- Department of Biology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Jiaxin Qu
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Peter N Refki
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
- Present address: Department of Evolutionary Genetics, Max-Planck-Institut für Evolutionsbiologie, August-Thienemann-Straße 2, 24306, Plön, Germany
| | - Rose Richter
- Department of Biology, University of Rochester, Rochester, NY, 14627, USA
- Present address: Earthworks Institute, 185 Caroline Street, Rochester, NY, 14620, USA
| | - Rolando Rivera-Pomar
- Centro de Bioinvestigaciones, Universidad Nacional del Noroeste de Buenos Aires, Pergamino, Argentina
| | - Andrew J Rosendale
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Siegfried Roth
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Lena Sachs
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - M Emília Santos
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Jan Seibert
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Essia Sghaier
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Jayendra N Shukla
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
- Present address: Department of Biotechnology, Central University of Rajasthan (CURAJ), NH-8, Bandarsindri, Ajmer, 305801, India
| | - Richard J Stancliffe
- Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121, Bonn, Germany
- Present address: E. A. Milne Centre for Astrophysics, Department of Physics and Mathematics, University of Hull, Hull, HU6 7RX, UK
| | - Olivia Tidswell
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
- Present address: Department of Zoology, University of Cambridge, Cambridge, CB2 3DT, UK
| | - Lucila Traverso
- Centro Regional de Estudios Genómicos, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Maurijn van der Zee
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, Netherlands
| | - Séverine Viala
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Kim C Worley
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Evgeny M Zdobnov
- Department of Genetic Medicine and Development and Swiss Institute of Bioinformatics, University of Geneva, 1211, Geneva, Switzerland
| | - Richard A Gibbs
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Stephen Richards
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
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Panfilio KA, Vargas Jentzsch IM, Benoit JB, Erezyilmaz D, Suzuki Y, Colella S, Robertson HM, Poelchau MF, Waterhouse RM, Ioannidis P, Weirauch MT, Hughes DST, Murali SC, Werren JH, Jacobs CGC, Duncan EJ, Armisén D, Vreede BMI, Baa-Puyoulet P, Berger CS, Chang CC, Chao H, Chen MJM, Chen YT, Childers CP, Chipman AD, Cridge AG, Crumière AJJ, Dearden PK, Didion EM, Dinh H, Doddapaneni HV, Dolan A, Dugan S, Extavour CG, Febvay G, Friedrich M, Ginzburg N, Han Y, Heger P, Holmes CJ, Horn T, Hsiao YM, Jennings EC, Johnston JS, Jones TE, Jones JW, Khila A, Koelzer S, Kovacova V, Leask M, Lee SL, Lee CY, Lovegrove MR, Lu HL, Lu Y, Moore PJ, Munoz-Torres MC, Muzny DM, Palli SR, Parisot N, Pick L, Porter ML, Qu J, Refki PN, Richter R, Rivera-Pomar R, Rosendale AJ, Roth S, Sachs L, Santos ME, Seibert J, Sghaier E, Shukla JN, Stancliffe RJ, Tidswell O, Traverso L, van der Zee M, Viala S, Worley KC, Zdobnov EM, Gibbs RA, Richards S. Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome. Genome Biol 2019; 20:64. [PMID: 30935422 PMCID: PMC6444547 DOI: 10.1186/s13059-019-1660-0] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 02/21/2019] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND The Hemiptera (aphids, cicadas, and true bugs) are a key insect order, with high diversity for feeding ecology and excellent experimental tractability for molecular genetics. Building upon recent sequencing of hemipteran pests such as phloem-feeding aphids and blood-feeding bed bugs, we present the genome sequence and comparative analyses centered on the milkweed bug Oncopeltus fasciatus, a seed feeder of the family Lygaeidae. RESULTS The 926-Mb Oncopeltus genome is well represented by the current assembly and official gene set. We use our genomic and RNA-seq data not only to characterize the protein-coding gene repertoire and perform isoform-specific RNAi, but also to elucidate patterns of molecular evolution and physiology. We find ongoing, lineage-specific expansion and diversification of repressive C2H2 zinc finger proteins. The discovery of intron gain and turnover specific to the Hemiptera also prompted the evaluation of lineage and genome size as predictors of gene structure evolution. Furthermore, we identify enzymatic gains and losses that correlate with feeding biology, particularly for reductions associated with derived, fluid nutrition feeding. CONCLUSIONS With the milkweed bug, we now have a critical mass of sequenced species for a hemimetabolous insect order and close outgroup to the Holometabola, substantially improving the diversity of insect genomics. We thereby define commonalities among the Hemiptera and delve into how hemipteran genomes reflect distinct feeding ecologies. Given Oncopeltus's strength as an experimental model, these new sequence resources bolster the foundation for molecular research and highlight technical considerations for the analysis of medium-sized invertebrate genomes.
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Affiliation(s)
- Kristen A Panfilio
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany.
- School of Life Sciences, University of Warwick, Gibbet Hill Campus, Coventry, CV4 7AL, UK.
| | - Iris M Vargas Jentzsch
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Joshua B Benoit
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Deniz Erezyilmaz
- Department of Biochemistry and Cell Biology and Center for Developmental Genetics, Stony Brook University, Stony Brook, NY, 11794, USA
- Present address: Department of Physiology, Anatomy and Genetics and Centre for Neural Circuits and Behaviour, University of Oxford, Oxford, OX1 3SR, UK
| | - Yuichiro Suzuki
- Department of Biological Sciences, Wellesley College, 106 Central St., Wellesley, MA, 02481, USA
| | - Stefano Colella
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
- Present address: LSTM, Laboratoire des Symbioses Tropicales et Méditerranéennes, INRA, IRD, CIRAD, SupAgro, University of Montpellier, Montpellier, France
| | - Hugh M Robertson
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | | | - Robert M Waterhouse
- Department of Genetic Medicine and Development and Swiss Institute of Bioinformatics, University of Geneva, 1211, Geneva, Switzerland
- Present address: Department of Ecology and Evolution, University of Lausanne, 1015, Lausanne, Switzerland
| | - Panagiotis Ioannidis
- Department of Genetic Medicine and Development and Swiss Institute of Bioinformatics, University of Geneva, 1211, Geneva, Switzerland
| | - Matthew T Weirauch
- Center for Autoimmune Genomics and Etiology, Division of Biomedical Informatics, and Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, 45229, USA
| | - Daniel S T Hughes
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Shwetha C Murali
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
- Present address: Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
- Present address: Howard Hughes Medical Institute, University of Washington, Seattle, WA, 98195, USA
| | - John H Werren
- Department of Biology, University of Rochester, Rochester, NY, 14627, USA
| | - Chris G C Jacobs
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, Netherlands
- Max Planck Institute for Chemical Ecology, Hans-Knöll Strasse 8, 07745, Jena, Germany
| | - Elizabeth J Duncan
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - David Armisén
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Barbara M I Vreede
- Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel
| | | | - Chloé S Berger
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Chun-Che Chang
- Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Hsu Chao
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Mei-Ju M Chen
- National Agricultural Library, Beltsville, MD, 20705, USA
| | - Yen-Ta Chen
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | | | - Ariel D Chipman
- Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel
| | - Andrew G Cridge
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Antonin J J Crumière
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Peter K Dearden
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Elise M Didion
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Huyen Dinh
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Harsha Vardhan Doddapaneni
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Amanda Dolan
- Department of Biology, University of Rochester, Rochester, NY, 14627, USA
- Present address: School of Life Sciences, Rochester Institute of Technology, Rochester, NY, 14623, USA
| | - Shannon Dugan
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Cassandra G Extavour
- Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA, 02138, USA
- Department of Molecular and Cellular Biology, Harvard University, 26 Oxford Street, Cambridge, MA, 02138, USA
| | - Gérard Febvay
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Markus Friedrich
- Department of Biological Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Neta Ginzburg
- Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel
| | - Yi Han
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Peter Heger
- Institute for Genetics, University of Cologne, Zülpicher Straße 47a, 50674, Cologne, Germany
| | - Christopher J Holmes
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Thorsten Horn
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Yi-Min Hsiao
- Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Emily C Jennings
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - J Spencer Johnston
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA
| | - Tamsin E Jones
- Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA, 02138, USA
| | - Jeffery W Jones
- Department of Biological Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Abderrahman Khila
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Stefan Koelzer
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | | | - Megan Leask
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Sandra L Lee
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Chien-Yueh Lee
- National Agricultural Library, Beltsville, MD, 20705, USA
| | - Mackenzie R Lovegrove
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
| | - Hsiao-Ling Lu
- Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Yong Lu
- Department of Entomology and Program in Molecular & Cell Biology, University of Maryland, College Park, MD, 20742, USA
| | - Patricia J Moore
- Department of Entomology, University of Georgia, 120 Cedar St., Athens, GA, 30602, USA
| | - Monica C Munoz-Torres
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Donna M Muzny
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Subba R Palli
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
| | - Nicolas Parisot
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Leslie Pick
- Department of Entomology and Program in Molecular & Cell Biology, University of Maryland, College Park, MD, 20742, USA
| | - Megan L Porter
- Department of Biology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Jiaxin Qu
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Peter N Refki
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
- Present address: Department of Evolutionary Genetics, Max-Planck-Institut für Evolutionsbiologie, August-Thienemann-Straße 2, 24306, Plön, Germany
| | - Rose Richter
- Department of Biology, University of Rochester, Rochester, NY, 14627, USA
- Present address: Earthworks Institute, 185 Caroline Street, Rochester, NY, 14620, USA
| | - Rolando Rivera-Pomar
- Centro de Bioinvestigaciones, Universidad Nacional del Noroeste de Buenos Aires, Pergamino, Argentina
| | - Andrew J Rosendale
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Siegfried Roth
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Lena Sachs
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - M Emília Santos
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Jan Seibert
- Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany
| | - Essia Sghaier
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Jayendra N Shukla
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
- Present address: Department of Biotechnology, Central University of Rajasthan (CURAJ), NH-8, Bandarsindri, Ajmer, 305801, India
| | - Richard J Stancliffe
- Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121, Bonn, Germany
- Present address: E. A. Milne Centre for Astrophysics, Department of Physics and Mathematics, University of Hull, Hull, HU6 7RX, UK
| | - Olivia Tidswell
- Department of Biochemistry and Genomics Aotearoa, University of Otago, Dunedin, 9054, New Zealand
- Present address: Department of Zoology, University of Cambridge, Cambridge, CB2 3DT, UK
| | - Lucila Traverso
- Centro Regional de Estudios Genómicos, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Maurijn van der Zee
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, Netherlands
| | - Séverine Viala
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, École Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, France
| | - Kim C Worley
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Evgeny M Zdobnov
- Department of Genetic Medicine and Development and Swiss Institute of Bioinformatics, University of Geneva, 1211, Geneva, Switzerland
| | - Richard A Gibbs
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Stephen Richards
- Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
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Cooper AM, Silver K, Zhang J, Park Y, Zhu KY. Molecular mechanisms influencing efficiency of RNA interference in insects. PEST MANAGEMENT SCIENCE 2019; 75:18-28. [PMID: 29931761 DOI: 10.1002/ps.5126] [Citation(s) in RCA: 175] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 05/21/2023]
Abstract
RNA interference (RNAi) is an endogenous, sequence-specific gene-silencing mechanism elicited by small RNA molecules. RNAi is a powerful reverse genetic tool, and is currently being utilized for managing insects and viruses. Widespread implementation of RNAi-based pest management strategies is currently hindered by inefficient and highly variable results when different insect species, strains, developmental stages, tissues, and genes are targeted. Mechanistic studies have shown that double-stranded ribonucleases (dsRNases), endosomal entrapment, deficient function of the core machinery, and inadequate immune stimulation contribute to limited RNAi efficiency. However, a comprehensive understanding of the molecular mechanisms limiting RNAi efficiency remains elusive. Recent advances in dsRNA stability in physiological tissues, dsRNA internalization into cells, the composition and function of the core RNAi machinery, as well as small-interfering RNA/double-stranded RNA amplification and spreading mechanisms are reviewed to establish a global understanding of the obstacles impeding wider understanding of RNAi mechanisms in insects. © 2018 Society of Chemical Industry.
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Affiliation(s)
| | - Kristopher Silver
- Department of Entomology, Kansas State University, Manhattan, KS, USA
| | - Jianzhen Zhang
- Department of Entomology, Kansas State University, Manhattan, KS, USA
- Institute of Applied Biology, Shanxi University, Taiyuan, China
| | - Yoonseong Park
- Department of Entomology, Kansas State University, Manhattan, KS, USA
| | - Kun Yan Zhu
- Department of Entomology, Kansas State University, Manhattan, KS, USA
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Davis-Vogel C, Van Allen B, Van Hemert JL, Sethi A, Nelson ME, Sashital DG. Identification and comparison of key RNA interference machinery from western corn rootworm, fall armyworm, and southern green stink bug. PLoS One 2018; 13:e0203160. [PMID: 30183751 PMCID: PMC6124762 DOI: 10.1371/journal.pone.0203160] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 08/15/2018] [Indexed: 12/18/2022] Open
Abstract
RNA interference (RNAi)-based technology shows great potential for use in agriculture, particularly for management of costly insect pests. In the decade since the insecticidal effects of environmentally-introduced RNA were first reported, this treatment has been applied to several types of insect pests. Through the course of those efforts, it has become apparent that different insects exhibit a range of sensitivity to environmentally-introduced RNAs. The variation in responses across insect is not well-understood, with differences in the underlying RNAi mechanisms being one explanation. This study evaluates eight proteins among three agricultural pests whose responses to environmental RNAi are known to differ: western corn rootworm (Diabrotica virgifera virgifera), fall armyworm (Spodoptera frugiperda), and southern green stink bug (Nezara viridula). These proteins have been identified in various organisms as centrally involved in facilitating the microRNA- and small interfering-RNA-mediated interference responses. Various bioinformatics tools, as well as gene expression profiling, were used to identify and evaluate putative homologues for characteristics that may contribute to the differing responses of these insects, such as the absence of critical functional domains within expressed sequences, the absence of entire gene sequences, or unusually low or undetectable expression of critical genes. Though many similarities were observed, the number of isoforms and expression levels of double-stranded RNA-binding and argonaute proteins varied across insect. Differences among key RNAi machinery genes of these three pests may impact the function of their RNAi pathways, and therefore, their respective responses to exogenous RNAs.
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Affiliation(s)
- Courtney Davis-Vogel
- Research and Development, DuPont Pioneer, Johnston, Iowa, United States of America
- Roy J. Carver Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa, United States of America
| | - Brandon Van Allen
- Research and Development, DuPont Pioneer, Johnston, Iowa, United States of America
| | - John L. Van Hemert
- Research and Development, DuPont Pioneer, Johnston, Iowa, United States of America
| | - Amit Sethi
- Research and Development, DuPont Pioneer, Johnston, Iowa, United States of America
| | - Mark E. Nelson
- Research and Development, DuPont Pioneer, Johnston, Iowa, United States of America
| | - Dipali G. Sashital
- Roy J. Carver Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa, United States of America
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Clathrin-dependent endocytosis is associated with RNAi response in the western corn rootworm, Diabrotica virgifera virgifera LeConte. PLoS One 2018; 13:e0201849. [PMID: 30092086 PMCID: PMC6084943 DOI: 10.1371/journal.pone.0201849] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/22/2018] [Indexed: 12/21/2022] Open
Abstract
The cellular uptake of dsRNA after dietary exposure is critical for RNAi efficiency; however, the mechanism of its uptake in many insects remains to be understood. In this study, we evaluated the roles of the endocytic pathway genes Clathrin heavy chain (Chc), Clathrin adaptor protein AP50, ADP ribosylation factor-like 1 (Arf72A), Vacuolar H+ATPase 16 kDa subunit (Vha16), and small GTPase Rab7 and putative sid-1-like genes (silA and silC) in RNAi response in western corn rootworm (WCR) using a two-stage dsRNA exposure bioassay. Silencing of Chc, Vha16, and AP50 led to a significant decrease in the effects of laccase2 dsRNA reporter, indicating that these genes are involved in RNAi response. However, the knockdown of either Arf72A or Rab7 did not suppress the response to laccase2 dsRNA. The silencing of the silC gene did not lead to a significant reduction in mortality or increase in the expression of V-ATPase A reporter. While the silencing of the silA gene significantly decreased insect mortality, significant changes in V-ATPase A expression were not detected. These results suggest that clathrin-dependent endocytosis is a biological mechanism that plays an important role during RNAi response in WCR adults. The fact that no definitive support for the roles of silA or silC in RNAi response was obtained support the idea that RNAi response varies greatly in different insect species, demanding additional studies focused on elucidating their involvement in this mechanism.
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Gosal SS, Wani SH. RNAi for Resistance Against Biotic Stresses in Crop Plants. BIOTECHNOLOGIES OF CROP IMPROVEMENT, VOLUME 2 2018. [PMCID: PMC7123769 DOI: 10.1007/978-3-319-90650-8_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
RNA interference (RNAi)-based gene silencing has become one of the most successful strategies in not only identifying gene function but also in improving agronomical traits of crops by silencing genes of different pathogens/pests and also plant genes for improvement of desired trait. The conserved nature of RNAi pathway across different organisms increases its applicability in various basic and applied fields. Here we attempt to summarize the knowledge generated on the fundamental mechanisms of RNAi over the years, with emphasis on insects and plant-parasitic nematodes (PPNs). This chapter also reviews the rich history of RNAi research, gene regulation by small RNAs across different organisms, and application potential of RNAi for generating transgenic plants resistant to major pests. But, there are some limitations too which restrict wider applications of this technology to its full potential. Further refinement of this technology in terms of resolving these shortcomings constitutes one of the thrust areas in present RNAi research. Nevertheless, its application especially in breeding agricultural crops resistant against biotic stresses will certainly offer the possible solutions for some of the breeding objectives which are otherwise unattainable.
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Affiliation(s)
- Satbir Singh Gosal
- School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana, Punjab India
| | - Shabir Hussain Wani
- Mountain Research Centre for Field Crops, Khudwani, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir India
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Bhatia V, Bhattacharya R. Host-mediated RNA interference targeting a cuticular protein gene impaired fecundity in the green peach aphid Myzus persicae. PEST MANAGEMENT SCIENCE 2018; 74:2059-2068. [PMID: 29493869 DOI: 10.1002/ps.4900] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 02/16/2018] [Accepted: 02/22/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The green peach aphid (Myzus persicae) is a devastating sap-sucking insect pest that damages many host plants worldwide and causes billions of dollars of crop losses. Induction of RNA interference (RNAi) through oral feeding of small interfering RNA (siRNA) has been demonstrated in aphids. Therefore, host-mediated delivery of double-stranded RNA (dsRNA) specific to vital structural genes of aphids has been envisaged as a tool for the development of resistance against this aphid species. RESULTS Cuticular protein (CP) senses seasonal photoperiodism and drives a shift from clonal to sexual generation in aphids. Thus, attenuation of CP gene expression is likely to result in a different reproductive orientation in aphids and thereby affect their fecundity. A gene encoding CP in M. persicae has been targeted for RNAi-mediated knockdown. Transgenic Arabidopsis expressing dsRNA homologous to the MyCP gene was developed. The dsRNA-transgenics produced gene-specific siRNAs fed by aphids infesting the transgenics. A reverse transcription-quantitative polymerase chain reaction (RT-qPCR) study revealed an attenuated level of transcripts of the CP gene in aphid nymphs reared on the transgenic plants. Decreased expression of the CP gene resulted in a noticeable decline in aphid fecundity on the transgenic Arabidopsis plants. CONCLUSION Increasing genetic resistance is the only sustainable way of minimizing the use of toxic agrochemicals to protect plants. Host-mediated RNAi of important insect genes has been proposed as a potential avenue for developing crop resistance against insect pests. This study demonstrated the potential of MyCP dsRNA in developing RNAi-based resistance to M. persicae. RNAi-mediated resistance is expected to be more durable compared with other transgenic strategies. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Varnika Bhatia
- ICAR-National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute Campus, New Delhi, India
| | - Ramcharan Bhattacharya
- ICAR-National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute Campus, New Delhi, India
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Paces J, Nic M, Novotny T, Svoboda P. Literature review of baseline information to support the risk assessment of RNAi‐based GM plants. ACTA ACUST UNITED AC 2017. [PMCID: PMC7163844 DOI: 10.2903/sp.efsa.2017.en-1246] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jan Paces
- Institute of Molecular Genetics of the Academy of Sciences of the Czech Republic (IMG)
| | | | | | - Petr Svoboda
- Institute of Molecular Genetics of the Academy of Sciences of the Czech Republic (IMG)
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Xie YF, Niu JZ, Jiang XZ, Yang WJ, Shen GM, Wei D, Smagghe G, Wang JJ. Influence of various stressors on the expression of core genes of the small interfering RNA pathway in the oriental fruit fly, Bactrocera dorsalis. INSECT SCIENCE 2017; 24:418-430. [PMID: 28547890 DOI: 10.1111/1744-7917.12311] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/02/2015] [Indexed: 06/07/2023]
Abstract
RNA interference (RNAi)-based technology has emerged as a potential tool for controlling insect pests, however, previous studies found that the efficiency of RNAi in Bactrocera dorsalis was variable. In nature, insects often meet various challenges, such as pathogen infections, extreme temperatures, lack of nutrition and heavy metals. To better understand the association of the stressors with efficiency of RNAi, in the current study we tested the expression of three core genes, dicer2 (Bddcr2), r2d2 (Bdr2d2) and argonaute2 (Bdago2), of the small interfering RNA (siRNA) pathway of B. dorsalis upon various stressors. Our results showed that all three genes were upregulated by the infection of invertebrate iridescent virus 6, which suggested a function of the siRNA pathway against viral infection. The loading of FeCl3 could also increase the expression of Bddcr2. The treatments of Escherichia coli, extremely high (40°C) and low (0°C) temperatures, as well as starvation, could negatively influence the expression of Bddcr2 and/or Bdago2. In total, our results showed that various stressors could influence the expression of core components of B. dorsalis siRNA pathway. This highlights further speculation on the RNAi efficiency upon these stressors. Considering the complexity and variation of RNAi efficiency in different conditions, these results provide initial aspects in possible environmental stressors to influence the activity of the siRNA pathway, but the real impact of RNAi efficiency posed by these stressors requires further studies.
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Affiliation(s)
- Yi-Fei Xie
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Hunan Academy of Forestry, Changsha, China
| | - Jin-Zhi Niu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Xuan-Zhao Jiang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Wen-Jia Yang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Guang-Mao Shen
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Dong Wei
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Guy Smagghe
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
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Thairu MW, Skidmore IH, Bansal R, Nováková E, Hansen TE, Li-Byarlay H, Wickline SA, Hansen AK. Efficacy of RNA interference knockdown using aerosolized short interfering RNAs bound to nanoparticles in three diverse aphid species. INSECT MOLECULAR BIOLOGY 2017; 26:356-368. [PMID: 28314050 DOI: 10.1111/imb.12301] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
RNA interference (RNAi) has emerged as a promising method for validating gene function; however, its utility in nonmodel insects has proven problematic, with delivery methods being one of the main obstacles. This study investigates a novel method of RNAi delivery in aphids, the aerosolization of short interfering RNA (siRNA)-nanoparticle complexes. By using nanoparticles as a siRNA carrier, the likelihood of cellular uptake is increased, when compared to methods previously used in insects. To determine the efficacy of this RNAi delivery system, siRNAs were aerosolized with and without nanoparticles in three aphid species: Acyrthosiphon pisum, Aphis glycines and Schizaphis graminum. The genes targeted for knockdown were carotene dehydrogenase (tor), which is important for pigmentation in Ac. pisum, and branched chain-amino acid transaminase (bcat), which is essential in the metabolism of branched-chain amino acids in all three aphid species. Overall, we observed modest gene knockdown of tor in Ac. pisum and moderate gene knockdown of bcat in Ap. glycines along with its associated phenotype. We also determined that the nanoparticle emulsion significantly increased the efficacy of gene knockdown. Overall, these results suggest that the aerosolized siRNA-nanoparticle delivery method is a promising new high-throughput and non-invasive RNAi delivery method in some aphid species.
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Affiliation(s)
- M W Thairu
- Department of Entomology, University of Illinois, Urbana-Champaign, IL, USA
| | - I H Skidmore
- Department of Entomology, University of Illinois, Urbana-Champaign, IL, USA
| | - R Bansal
- Department of Entomology, The Ohio State University, Wooster, OH, USA
| | - E Nováková
- Department of Entomology, University of Illinois, Urbana-Champaign, IL, USA
| | - T E Hansen
- Department of Entomology, University of Illinois, Urbana-Champaign, IL, USA
| | - H Li-Byarlay
- Department of Entomology, North Carolina State University, Raleigh, NC, USA
| | - S A Wickline
- School of Medicine, Washington University in St. Louis, MO, USA
| | - A K Hansen
- Department of Entomology, University of Illinois, Urbana-Champaign, IL, USA
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Pan H, Xu L, Noland JE, Li H, Siegfried BD, Zhou X. Assessment of Potential Risks of Dietary RNAi to a Soil Micro-arthropod, Sinella curviseta Brook (Collembola: Entomobryidae). FRONTIERS IN PLANT SCIENCE 2016; 7:1028. [PMID: 27471512 PMCID: PMC4945638 DOI: 10.3389/fpls.2016.01028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/30/2016] [Indexed: 05/08/2023]
Abstract
RNAi-based genetically engineered (GE) crops for the management of insect pests are likely to be commercialized by the end of this decade. Without a workable framework for conducting the ecological risk assessment (ERA) and a standardized ERA protocol, however, the utility of RNAi transgenic crops in pest management remains uncertain. The overall goal of this study is to assess the risks of RNAi-based GE crops on a non-target soil micro-arthropod, Sinella curviseta, which could be exposed to plant-protected dsRNAs deposited in crop residues. Based on the preliminary research, we hypothesized that insecticidal dsRNAs targeting at the western corn rootworm, Diabrotica virgifera virgifera, a billion-dollar insect pest, has no adverse impacts on S. curviseta, a soil decomposer. Following a tiered approach, we tested this risk hypothesis using a well-designed dietary RNAi toxicity assay. To create the worst-case scenario, the full-length cDNA of v-ATPase subunit A from S. curviseta were cloned and a 400 bp fragment representing the highest sequence similarity between target pest and non-target arthropods was selected as the template to synthesize insecticidal dsRNAs. Specifically, 10-days-old S. curviseta larvae were subjected to artificial diets containing v-ATPase A dsRNAs from both D. v. virgifera (dsDVV) and S. curviseta (dsSC), respectively, a dsRNA control, β-glucuronidase, from plant (dsGUS), and a vehicle control, H2O. The endpoint measurements included gene expression profiles, survival, and life history traits, such as developmental time, fecundity, hatching rate, and body length. Although, S. curviseta larvae developed significantly faster under the treatments of dsDVV and dsSC than the vehicle control, the combined results from both temporal RNAi effect study and dietary RNAi toxicity assay support the risk hypothesis, suggesting that the impacts of ingested arthropod-active dsRNAs on this representative soil decomposer are negligible.
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Affiliation(s)
- Huipeng Pan
- Department of Entomology, University of Kentucky, LexingtonKY, USA
| | - Linghua Xu
- Department of Entomology, University of Kentucky, LexingtonKY, USA
| | | | - Hu Li
- Department of Entomology, University of Kentucky, LexingtonKY, USA
| | - Blair D. Siegfried
- Department of Entomology and Nematology, University of Florida, GainesvilleFL, USA
| | - Xuguo Zhou
- Department of Entomology, University of Kentucky, LexingtonKY, USA
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27
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Cappelle K, de Oliveira CFR, Van Eynde B, Christiaens O, Smagghe G. The involvement of clathrin-mediated endocytosis and two Sid-1-like transmembrane proteins in double-stranded RNA uptake in the Colorado potato beetle midgut. INSECT MOLECULAR BIOLOGY 2016; 25:315-23. [PMID: 26959524 DOI: 10.1111/imb.12222] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
RNA interference (RNAi) is a powerful tool in entomology and shows promise as a crop protection strategy, but variability in its efficiency across different insect species limits its applicability. For oral uptake of the double-stranded RNA (dsRNA), the RNAi trigger, two different mechanisms are known: systemic RNA interference deficient-1 (Sid-1) transmembrane channel-mediated uptake and clathrin-mediated endocytosis. So far, a wide range of experiments has been conducted, confirming the involvement of one of the pathways in dsRNA uptake, but never both pathways in the same species. We investigated the role of both pathways in dsRNA uptake in the Colorado potato beetle, Leptinotarsa decemlineata, known to have an efficient RNAi response. Through RNAi-of-RNAi experiments, we demonstrated the contribution of two different sid-1-like (sil) genes, silA and silC, and clathrin heavy chain and the 16kDa subunit of the vacuolar H(+) ATPase (vha16), elements of the endocytic pathway, to the RNAi response. Furthermore, the sid-1-like genes were examined through phylogenetic and hydrophobicity analysis. This article reports for the first time on the involvement of two pathways in dsRNA uptake in an insect species and stresses the importance of evaluating both pathways through a well-devised reporter system in any future experiments on cellular dsRNA uptake.
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Affiliation(s)
- K Cappelle
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - C F R de Oliveira
- Department of Biochemistry, Institute of Biology, University of Campinas, Campinas, Sao Paulo, Brazil
| | - B Van Eynde
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - O Christiaens
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - G Smagghe
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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Yu XD, Liu ZC, Huang SL, Chen ZQ, Sun YW, Duan PF, Ma YZ, Xia LQ. RNAi-mediated plant protection against aphids. PEST MANAGEMENT SCIENCE 2016; 72:1090-8. [PMID: 26888776 DOI: 10.1002/ps.4258] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 12/21/2015] [Accepted: 02/15/2016] [Indexed: 05/10/2023]
Abstract
Aphids (Aphididae) are major agricultural pests that cause significant yield losses of crop plants each year by inflicting damage both through the direct effects of feeding and by vectoring harmful plant viruses. Expression of double-stranded RNA (dsRNA) directed against suitable insect target genes in transgenic plants has been shown to give protection against pests through plant-mediated RNA interference (RNAi). Thus, as a potential alternative and effective strategy for insect pest management in agricultural practice, plant-mediated RNAi for aphid control has received close attention in recent years. In this review, the mechanism of RNAi in insects and the so far explored effective RNAi target genes in aphids, their potential applications in the development of transgenic plants for aphid control and the major challenges in this regard are reviewed, and the future prospects of using plant-mediated RNAi for aphid control are discussed. This review is intended to be a helpful insight into the generation of aphid-resistant plants through plant-mediated RNAi strategy. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Xiu-Dao Yu
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zong-Cai Liu
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - Si-Liang Huang
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - Zhi-Qin Chen
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - Yong-Wei Sun
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Peng-Fei Duan
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - You-Zhi Ma
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lan-Qin Xia
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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Rebijith KB, Asokan R, Ranjitha HH, Rajendra Prasad BS, Krishna V, Krishna Kumar NK. Diet-Delivered dsRNAs for Juvenile Hormone-Binding Protein and Vacuolar ATPase-H Implied Their Potential in the Management of the Melon Aphid (Hemiptera: Aphididae). ENVIRONMENTAL ENTOMOLOGY 2016; 45:268-75. [PMID: 26645766 DOI: 10.1093/ee/nvv178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
RNA interference is a sequence-specific gene silencing mechanism mediated by double-stranded RNA (dsRNA), which has been harnessed as a useful tool in devising novel insect pest management strategies for various pests such as melon aphid, Aphis gossypii (Glover). In the current study, we cloned and sequenced juvenile hormone-binding protein (JHBP) and vacuolar ATPase subunit H (V-ATPase-H) from A. gossypii. We also showed the effectiveness of diet-mediated delivery of dsRNA for JHBP and V-ATPase-H, which silenced the above genes and resulted in mortality. The extent of silencing and mortality were similar for both genes up until 96 h. Bioassay results revealed that the target genes were silenced variably, 1.0 µg/µl concentration having a more profound effect than 0.5 and 0.25 µg/µl concentration in reducing the cognate mRNA transcript level. Results indicated a 9.56–73.21% down regulation (across time and concentrations for both the genes) that resulted in the mortality of A. gossypii. Mortality was in the range of 10–63% for both these genes. Thus, the current study demonstrated the potentiality of both JHBP and V-ATPase-H as excellent targets for the management of A. gossypii.
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30
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Sattar S, Thompson GA. Small RNA Regulators of Plant-Hemipteran Interactions: Micromanagers with Versatile Roles. FRONTIERS IN PLANT SCIENCE 2016; 7:1241. [PMID: 27625654 PMCID: PMC5003895 DOI: 10.3389/fpls.2016.01241] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 08/04/2016] [Indexed: 05/13/2023]
Abstract
Non-coding small RNAs (sRNAs) in plants have important roles in regulating biological processes, including development, reproduction, and stress responses. Recent research indicates significant roles for sRNA-mediated gene silencing during plant-hemipteran interactions that involve all three of these biological processes. Plant responses to hemipteran feeding are determined by changes in the host transcriptome that appear to be fine-tuned by sRNAs. The role of sRNA in plant defense responses is complex. Different forms of sRNAs, with specific modes of action, regulate changes in the host transcriptome primarily through post-transcriptional gene silencing and occasionally through translational repression. Plant genetic resistance against hemipterans provides a model to explore the regulatory roles of sRNAs in plant defense. Aphid-induced sRNA expression in resistance genotypes delivers a new paradigm in understanding the regulation of R gene-mediated resistance in host plants. Unique sRNA profiles, including changes in sRNA biogenesis and expression can also provide insights into susceptibility to insect herbivores. Activation of phytohormone-mediated defense responses against insect herbivory is another hallmark of this interaction, and recent studies have shown that regulation of phytohormone signaling is under the control of sRNAs. Hemipterans feeding on resistant plants also show changes in insect sRNA profiles, possibly influencing insect development and reproduction. Changes in insect traits such as fecundity, host range, and resistance to insecticides are impacted by sRNAs and can directly contribute to the success of certain insect biotypes. In addition to causing direct damage to the host plant, hemipteran insects are often vectors of viral pathogens. Insect anti-viral RNAi machinery is activated to limit virus accumulation, suggesting a role in insect immunity. Virus-derived long sRNAs strongly resemble insect piRNAs, leading to the speculation that the piRNA pathway is induced in response to viral infection. Evidence for robust insect RNAi machinery in several hemipteran species is of immense interest and is being actively pursued as a possible tool for insect control. RNAi-induced gene silencing following uptake of exogenous dsRNA was successfully demonstrated in several hemipterans and the presence of sid-1 like genes support the concept of a systemic response in some species.
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Guo WC, Fu KY, Yang S, Li XX, Li GQ. Instar-dependent systemic RNA interference response in Leptinotarsa decemlineata larvae. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 123:64-73. [PMID: 26267054 DOI: 10.1016/j.pestbp.2015.03.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 02/28/2015] [Accepted: 03/15/2015] [Indexed: 06/04/2023]
Abstract
RNA interference (RNAi) is a promising approach to control Leptinotarsa decemlineata. In this study, RNAi efficiency by double-stranded RNA (dsRNA) targeting S-adenosyl-L-homocysteine hydrolase (LdSAHase) was compared among L. decemlineata first- to fourth-instar larvae. Ingesting dsLdSAHase successfully decreased the target gene expression, caused lethality, inhibited growth and impaired pupation in an instar- and concentration-dependent manner. To study the role of Dicer2 and Argonaute2 genes in RNAi efficiency, we identified LdDcr2a, LdDcr2b, LdAgo2a and LdAgo2b. Their expression levels were higher in young larvae than those in old ones. Exposure to dsegfp for 6 h significantly elevated LdDcr2a, LdDcr2b, LdAgo2a and LdAgo2b mRNA levels in the first-, second-, third- and fourth-instar larvae. When the exposure periods were extended, however, the expression levels were gradually reduced. Continuous exposure for 72 h significantly repressed the expression of LdAgo2a and LdAgo2b in the first, second and third larval instars, and the four genes in final instars. Moreover, we found that dsLdSAHase-caused LdSAHase suppressions and larval mortalities were influenced by previous dsegfp exposure: 12 h of previous exposure increased LdSAHase silencing and mortality of the final instar larvae, whereas 72 h of exposure reduced LdSAHase silencing and mortality. Thus, it seems the activities of core RNAi-machinery proteins affect RNAi efficiency in L. decemlineata.
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Affiliation(s)
- Wen-Chao Guo
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
| | - Kai-Yun Fu
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Shuai Yang
- Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
| | - Xiao-Xu Li
- Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
| | - Guo-Qing Li
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
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Nicholson SJ, Nickerson ML, Dean M, Song Y, Hoyt PR, Rhee H, Kim C, Puterka GJ. The genome of Diuraphis noxia, a global aphid pest of small grains. BMC Genomics 2015; 16:429. [PMID: 26044338 PMCID: PMC4561433 DOI: 10.1186/s12864-015-1525-1] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 04/11/2015] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The Russian wheat aphid, Diuraphis noxia Kurdjumov, is one of the most important pests of small grains throughout the temperate regions of the world. This phytotoxic aphid causes severe systemic damage symptoms in wheat, barley, and other small grains as a direct result of the salivary proteins it injects into the plant while feeding. RESULTS We sequenced and de novo assembled the genome of D. noxia Biotype 2, the strain most virulent to resistance genes in wheat. The assembled genomic scaffolds span 393 MB, equivalent to 93% of its 421 MB genome, and contains 19,097 genes. D. noxia has the most AT-rich insect genome sequenced to date (70.9%), with a bimodal CpG(O/E) distribution and a complete set of methylation related genes. The D. noxia genome displays a widespread, extensive reduction in the number of genes per ortholog group, including defensive, detoxification, chemosensory, and sugar transporter groups in comparison to the Acyrthosiphon pisum genome, including a 65% reduction in chemoreceptor genes. Thirty of 34 known D. noxia salivary genes were found in this assembly. These genes exhibited less homology with those salivary genes commonly expressed in insect saliva, such as glucose dehydrogenase and trehalase, yet greater conservation among genes that are expressed in D. noxia saliva but not detected in the saliva of other insects. Genes involved in insecticide activity and endosymbiont-derived genes were also found, as well as genes involved in virus transmission, although D. noxia is not a viral vector. CONCLUSIONS This genome is the second sequenced aphid genome, and the first of a phytotoxic insect. D. noxia's reduced gene content of may reflect the influence of phytotoxic feeding in shaping the D. noxia genome, and in turn in broadening its host range. The presence of methylation-related genes, including cytosine methylation, is consistent with other parthenogenetic and polyphenic insects. The D. noxia genome will provide an important contrast to the A. pisum genome and advance functional and comparative genomics of insects and other organisms.
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Affiliation(s)
- Scott J Nicholson
- USDA Agricultural Research Service, Stillwater, OK, 74075, USA.
- Department of Molecular Biology and Biochemistry, Oklahoma State University, Stillwater, OK, 74078, USA.
| | - Michael L Nickerson
- National Institutes of Health, National Cancer Institute, Bethesda, MD, 20892, USA.
| | - Michael Dean
- National Institutes of Health, National Cancer Institute, Bethesda, MD, 20892, USA.
| | - Yan Song
- Department of Molecular Biology and Biochemistry, Oklahoma State University, Stillwater, OK, 74078, USA.
| | - Peter R Hoyt
- Department of Molecular Biology and Biochemistry, Oklahoma State University, Stillwater, OK, 74078, USA.
| | | | | | - Gary J Puterka
- USDA Agricultural Research Service, Stillwater, OK, 74075, USA.
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Santos D, Vanden Broeck J, Wynant N. Systemic RNA interference in locusts: reverse genetics and possibilities for locust pest control. CURRENT OPINION IN INSECT SCIENCE 2014; 6:9-14. [PMID: 32846691 DOI: 10.1016/j.cois.2014.09.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/10/2014] [Accepted: 09/18/2014] [Indexed: 06/11/2023]
Abstract
RNA interference (RNAi) is a biological process triggered by double stranded (ds)RNA that results in sequence-dependent mRNA degradation. Because of its high specificity, this post-transcriptional gene silencing mechanism is a widely used tool for reverse genetics in several insect species. In particular, locusts possess a very robust and sensitive RNAi response that has already been exploited to investigate a diverse range of important physiological processes. These orthopteran insects constitute important model organisms in several areas of entomology, but they can also become voracious swarming pests that threaten the agricultural production in large parts of the world. In comparison to the widely applied chemical insecticides, the RNAi-technology could contribute to the development of a novel generation of insecticides, with high species-specificity. In this article, we discuss the potential of the RNAi-technology in loss of function studies in locusts, as well as to control locust populations.
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Affiliation(s)
- Dulce Santos
- Molecular Developmental Physiology and Signal Transduction, Department of Animal Physiology and Neurobiology, KU Leuven, Naamsestraat 59, P.O. Box 02465, B-3000 Leuven, Belgium
| | - Jozef Vanden Broeck
- Molecular Developmental Physiology and Signal Transduction, Department of Animal Physiology and Neurobiology, KU Leuven, Naamsestraat 59, P.O. Box 02465, B-3000 Leuven, Belgium
| | - Niels Wynant
- Molecular Developmental Physiology and Signal Transduction, Department of Animal Physiology and Neurobiology, KU Leuven, Naamsestraat 59, P.O. Box 02465, B-3000 Leuven, Belgium.
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Christiaens O, Smagghe G. The challenge of RNAi-mediated control of hemipterans. CURRENT OPINION IN INSECT SCIENCE 2014; 6:15-21. [PMID: 32846663 DOI: 10.1016/j.cois.2014.09.012] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 09/04/2014] [Accepted: 09/10/2014] [Indexed: 06/11/2023]
Abstract
The post-transcriptional gene silencing mechanism RNA interference (RNAi) has potential as a crop protection strategy against important pest insects. Here we focus on Hemiptera pests, comprising some of the most devastating pest organisms as aphids, whiteflies, psyllids, bedbugs and kissing bugs. At first, a state-of-the-art overview is provided of the progress in RNAi in Hemiptera, as well as on the challenges when developing new RNAi-based pest control strategies against hemipteran pests, such as the delivery of dsRNA and degradation in the insect body. We also discuss the variability in RNAi efficiency as observed between species and experiments, and the factors potentially responsible for this phenomenon.
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Affiliation(s)
- Olivier Christiaens
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Guy Smagghe
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
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35
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Ghosh S, Kakumani PK, Kumar A, Malhotra P, Mukherjee SK, Bhatnagar RK. Genome wide screening of RNAi factors of Sf21 cells reveal several novel pathway associated proteins. BMC Genomics 2014; 15:775. [PMID: 25199785 PMCID: PMC4247154 DOI: 10.1186/1471-2164-15-775] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 08/29/2014] [Indexed: 12/18/2022] Open
Abstract
Background RNA interference (RNAi) leads to sequence specific knock-down of gene expression and has emerged as an important tool to analyse gene functions, pathway analysis and gene therapy. Although RNAi is a conserved cellular process involving common elements and factors, species-specific differences have been observed among different eukaryotes. Identification of components for RNAi pathway is pursued intensively and successful genome-wide screens have been performed for components of RNAi pathways in various organisms. Functional comparative genomics analysis offers evolutionary insight that forms basis of discoveries of novel RNAi-factors within related organisms. Keeping in view the academic and commercial utility of insect derived cell-line from Spodoptera frugiperda, we pursued the identification and functional analysis of components of RNAi-machinery of Sf21 cell-line using genome-wide application. Results The genome and transcriptome of Sf21 was assembled and annotated. In silico application of comparative genome analysis among insects allowed us to identify several RNAi factors in Sf21 line. The candidate RNAi factors from assembled genome were validated by knockdown analysis of candidate factors using the siRNA screens on the Sf21-gfp reporter cell-line. Forty two (42) potential factors were identified using the cell based assay. These include core RNAi elements including Dicer-2, Argonaute-1, Drosha, Aubergine and auxiliary modules like chromatin factors, RNA helicases, RNA processing module, signalling allied proteins and others. Phylogenetic analyses and domain architecture revealed that Spodoptera frugiperda homologs retained identity with Lepidoptera (Bombyx mori) or Coleoptera (Tribolium castaneum) sustaining an evolutionary conserved scaffold in post-transcriptional gene silencing paradigm within insects. Conclusion The database of RNAi-factors generated by whole genome association survey offers comprehensive outlook about conservation as well as specific differences of the proteins of RNAi machinery. Understanding the interior involved in different phases of gene silencing also offers impending tool for RNAi-based applications. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-775) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | - Pawan Malhotra
- Insect Resistance Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India.
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Wu K, Liu W, Mar T, Liu Y, Wu Y, Wang X. Sequencing and validation of reference genes to analyze endogenous gene expression and quantify yellow dwarf viruses using RT-qPCR in viruliferous Rhopalosiphum padi. PLoS One 2014; 9:e97038. [PMID: 24810421 PMCID: PMC4014588 DOI: 10.1371/journal.pone.0097038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 04/14/2014] [Indexed: 12/18/2022] Open
Abstract
The bird cherry-oat aphid (Rhopalosiphum padi), an important pest of cereal crops, not only directly sucks sap from plants, but also transmits a number of plant viruses, collectively the yellow dwarf viruses (YDVs). For quantifying changes in gene expression in vector aphids, reverse transcription-quantitative polymerase chain reaction (RT-qPCR) is a touchstone method, but the selection and validation of housekeeping genes (HKGs) as reference genes to normalize the expression level of endogenous genes of the vector and for exogenous genes of the virus in the aphids is critical to obtaining valid results. Such an assessment has not been done, however, for R. padi and YDVs. Here, we tested three algorithms (GeNorm, NormFinder and BestKeeper) to assess the suitability of candidate reference genes (EF-1α, ACT1, GAPDH, 18S rRNA) in 6 combinations of YDV and vector aphid morph. EF-1α and ACT1 together or in combination with GAPDH or with GAPDH and 18S rRNA could confidently be used to normalize virus titre and expression levels of endogenous genes in winged or wingless R. padi infected with Barley yellow dwarf virus isolates (BYDV)-PAV and BYDV-GAV. The use of only one reference gene, whether the most stably expressed (EF-1α) or the least stably expressed (18S rRNA), was not adequate for obtaining valid relative expression data from the RT-qPCR. Because of discrepancies among values for changes in relative expression obtained using 3 regions of the same gene, different regions of an endogenous aphid gene, including each terminus and the middle, should be analyzed at the same time with RT-qPCR. Our results highlight the necessity of choosing the best reference genes to obtain valid experimental data and provide several HKGs for relative quantification of virus titre in YDV-viruliferous aphids.
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Affiliation(s)
- Keke Wu
- College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wenwen Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Thithi Mar
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yan Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yunfeng Wu
- College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
- * E-mail: (XW); (YW)
| | - Xifeng Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- * E-mail: (XW); (YW)
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37
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Upadhyay SK, Dixit S, Sharma S, Singh H, Kumar J, Verma PC, Chandrashekar K. siRNA machinery in whitefly (Bemisia tabaci). PLoS One 2013; 8:e83692. [PMID: 24391810 PMCID: PMC3877088 DOI: 10.1371/journal.pone.0083692] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 11/06/2013] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND RNA interference has been emerged as an utmost tool for the control of sap sucking insect pests. Systemic response is necessary to control them in field condition. Whitefly is observed to be more prone to siRNA in recent studies, however the siRNA machinery and mechanism is not well established. METHODOLOGY/PRINCIPAL FINDINGS To identify the core siRNA machinery, we curated transcriptome data of whitefly from NCBI database. Partial mRNA sequences encoding Dicer2, R2D2, Argonaute2 and Sid1 were identified by tblastn search of homologous sequences from Aphis glycines and Tribolium castaneum. Complete encoding sequences were obtained by RACE, protein sequences derived by Expasy translate tool and confirmed by blastp analysis. Conserved domain search and Prosite-Scan showed similar domain architecture as reported in homologs from related insects. We found helicase, PAZ, RNaseIIIa, RNaseIIIb and double-stranded RNA-binding fold (DSRBF) in Dicer2; DsRBD in R2D2; and PAZ and PIWI domains in Argonaute2. Eleven transmembrane domains were detected in Sid1. Sequence homology and phylogenetic analysis revealed that RNAi machinery of whitefly is close to Aphids. Real-time PCR analysis showed similar expression of these genes in different developmental stages as reported in A. glycines and T. castaneum. Further, the expression level of above genes was quite similar to the housekeeping gene actin. CONCLUSIONS/SIGNIFICANCE Availability of core siRNA machinery including the Sid1 and their universal expression in reasonable quantity indicated significant response of whitefly towards siRNA. Present report opens the way for controlling whitefly, one of the most destructive crop insect pest.
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Affiliation(s)
- Santosh Kumar Upadhyay
- National Agri-Food Biotechnology Institute, (Department of Biotechnology, Government of India), Mohali, Punjab, India
- * E-mail: (SKU); (PCV); (KC)
| | - Sameer Dixit
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research, RanaPratapMarg, Lucknow, India
| | - Shailesh Sharma
- National Agri-Food Biotechnology Institute, (Department of Biotechnology, Government of India), Mohali, Punjab, India
| | - Harpal Singh
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research, RanaPratapMarg, Lucknow, India
| | - Jitesh Kumar
- National Agri-Food Biotechnology Institute, (Department of Biotechnology, Government of India), Mohali, Punjab, India
| | - Praveen C. Verma
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research, RanaPratapMarg, Lucknow, India
- * E-mail: (SKU); (PCV); (KC)
| | - K. Chandrashekar
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research, RanaPratapMarg, Lucknow, India
- Indian Agricultural Research Institute-Regional Station, Agricultural College Estate, Shivaji Nagar, Pune, Maharashtra, India
- * E-mail: (SKU); (PCV); (KC)
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