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Luo X, Fang G, Chen K, Song Y, Lu T, Tomberlin JK, Zhan S, Huang Y. A gut commensal bacterium promotes black soldier fly larval growth and development partly via modulation of intestinal protein metabolism. mBio 2023; 14:e0117423. [PMID: 37706881 PMCID: PMC10653789 DOI: 10.1128/mbio.01174-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 06/22/2023] [Indexed: 09/15/2023] Open
Abstract
IMPORTANCE Black solider fly larvae and the gut microbiota can recycle nutrients from various organic wastes into valuable insect biomass. We found that Citrobacter amalonaticus, a gut commensal bacterium of the insect, exerts beneficial effects on larval growth and development and that the expression of many metabolic larval genes was significantly impacted by the symbiont. To identify the larval genes involved in the host-symbiont interaction, we engineered the symbiont to produce double-strand RNA and enabled the strain to silence host genes in the larval gut environment where the interaction takes place. With this approach, we confirmed that two intestinal protease families are involved in the interaction and provided further evidence that intestinal protein metabolism plays a role in the interaction. This work expands the genetic toolkits available to study the insect functional genomics and host-symbiont interaction and provide the prospective for the future application of gut microbiota on the large-scale bioconversion.
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Affiliation(s)
- Xingyu Luo
- Key Laboratory of Insect Developmental and Evolutionary Biology, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Gangqi Fang
- Key Laboratory of Insect Developmental and Evolutionary Biology, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Kuangqin Chen
- Key Laboratory of Insect Developmental and Evolutionary Biology, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Yu Song
- Key Laboratory of Insect Developmental and Evolutionary Biology, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Tianyi Lu
- Key Laboratory of Insect Developmental and Evolutionary Biology, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | | | - Shuai Zhan
- Key Laboratory of Insect Developmental and Evolutionary Biology, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Yongping Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
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Ahmad S, Jamil M, Fahim M, Zhang S, Ullah F, Lyu B, Luo Y. RNAi-Mediated Knockdown of Imaginal Disc Growth Factors (IDGFs) Genes Causes Developmental Malformation and Mortality in Melon Fly, Zeugodacus cucurbitae. Front Genet 2021; 12:691382. [PMID: 34290744 PMCID: PMC8287652 DOI: 10.3389/fgene.2021.691382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/10/2021] [Indexed: 01/13/2023] Open
Abstract
This study reports the first successful use of oral feeding dsRNA technique for functional characterization of imaginal disc growth factors (IDGFs) genes (IDGF1, IDGF3_1, IDGF4_0, IDGF4_1, and IDGF6) in melon fly Zeugodacus cucurbitae. Phylogenetic and domain analysis indicates that these genes had high similarity with other Tephritidae fruit flies homolog and contain only one conserved domain among these five genes, which is glyco-18 domain (glyco-hydro-18 domain). Gene expression analysis at different developmental stages revealed that these genes were expressed at larval, pupal, and adult stages. To understand their role in different developmental stages, larvae were fed dsRNA-corresponding to each of the five IDGFs, in an artificial diet. RNAi-mediated knockdown of IDGF1 shows no phenotypic effects but caused mortality (10.4%), while IDGF4_0 caused malformed pharate at the adult stage where insects failed to shed their old cuticle and remained attached with their body, highest mortality (49.2%) was recorded compared to dsRNA-green fluorescent protein (GFP) or DEPC. Silencing of IDGF3_1 and IDGF4_1 cause lethal phenotype in larvae, (17.2%) and (40%) mortality was indexed in Z. cucurbitae. IDGF6 was mainly expressed in pupae and adult stages, and its silencing caused a malformation in adult wings. The developmental defects such as malformation in wings, larval–larval lethality, pupal–adult malformation, and small body size show that IDGFs are key developmental genes in the melon fly. Our results provide a baseline for the melon fly management and understanding of IDGFs specific functions in Z. cucurbitae.
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Affiliation(s)
- Shakil Ahmad
- School of Plant Protection, Hainan University, Haikou, China
| | - Momana Jamil
- School of Plant Protection, Hainan University, Haikou, China
| | - Muhammad Fahim
- Centre for Omic Sciences, Islamia College University, Peshawar, Pakistan
| | - Shujing Zhang
- School of Plant Protection, Hainan University, Haikou, China
| | - Farman Ullah
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Baoqian Lyu
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou, China
| | - Yanping Luo
- School of Plant Protection, Hainan University, Haikou, China
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3
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Kolge H, Kadam K, Galande S, Lanjekar V, Ghormade V. New Frontiers in Pest Control: Chitosan Nanoparticles-Shielded dsRNA as an Effective Topical RNAi Spray for Gram Podborer Biocontrol. ACS APPLIED BIO MATERIALS 2021; 4:5145-5157. [PMID: 35006998 DOI: 10.1021/acsabm.1c00349] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chickpea pod borer, Helicoverpa armigera, displays resistance to chemical insecticides and transgenics. The potential nontransformative RNAi approach of specific gene silencing by mRNA breakdown through exogenous double-stranded (dsRNA) delivery to Helicoverpa faces problems of degradation by nucleases and insect gut pH. We demonstrate that chitosan nanoparticles (CNPs) effectively mediate specific dsRNA delivery against Helicoverpa armigera juvenile hormone methyltransferase (JHAMT) and acetylcholine esterase (ACHE) target genes. Ionotropically synthesized cationic CNPs (100 nm size, +32 mV charge) loaded dsRNA efficiently and protected it effectively from degradation by nucleases and insect gut pH. Tagging CNPs with Calcofluor fluorescence illustrated its efficient uptake in columnar insect gut cells. The potential of CNPs-mediated dsRNA delivery was elucidated with effective silencing of green fluorescent protein transformed Sf9 cells. Furthermore, CNPs-dsRNA complexes were stable for 5 d on leaf surfaces, and their ingestion with leaf effectively silenced H. armigera JHAMT and ACHE genes to suppress related enzyme activities and caused 100% insect mortality. Further, in planta bioassay with CNPs-dsRNA spray confirmed the RNAi induced insect mortality. Moreover, CNPs-dsRNA fed nontarget insects Spodoptera litura and Drosophila melanogaster were unaffected, and no toxicity was observed for CNPs in cell line studies. Remarkably, only two low dose (0.028 g/ha) topical CNPs-ache-dsRNA sprays on chickpea displayed reduced pod damage with high yields on par with chemical control in the field, which was followed by CNPs-jhamt-dsRNA nanoformulation. These studies can pave the way for the development of topical application of CNPs-dsRNA spray as a safe, specific, innovative insecticide for sustainable crop protection.
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Affiliation(s)
- Henry Kolge
- Nanobioscience Group, Agharkar Research Institute, Pune 411004, India.,Savitribai Phule Pune University, Pune 411007, India
| | - Kartiki Kadam
- Nanobioscience Group, Agharkar Research Institute, Pune 411004, India
| | - Sharad Galande
- Agricultural Entomology Section, College of Agriculture, Mahatma Phule Krishi Vidyapeeth, Pune 411005, India
| | - Vikram Lanjekar
- Biodiversity and Bioenergy, Agharkar Research Institute, Pune 411004, India
| | - Vandana Ghormade
- Nanobioscience Group, Agharkar Research Institute, Pune 411004, India.,Savitribai Phule Pune University, Pune 411007, India
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Mohan C, Shibao PYT, de Paula FFP, Toyama D, Vieira MAS, Figueira A, Scotton D, Soares-Costa A, Henrique-Silva F. hRNAi-mediated knock-down of Sphenophorus levis V-ATPase E in transgenic sugarcane (Saccharum spp interspecific hybrid) affects the insect growth and survival. PLANT CELL REPORTS 2021; 40:507-516. [PMID: 33389048 DOI: 10.1007/s00299-020-02646-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Transgenic sugarcane expressing V-ATPase subunit E dsRNA affects growth and survival of Sphenophorus levis. Plants being sessile organisms are constantly confronted with several biotic and abiotic stresses. Sugarcane (Saccharum spp) is a major tropical crop widely cultivated for its sugar and other by-products. In Brazil, sugarcane plantations account for significant production losses due to Sphenophorus levis (sugarcane weevil) infestations. With the existing control measures being less effective, there arises a necessity for advanced strategies. Our bioassay injection experiments with V-ATPase E dsRNA in S. levis larvae showed significant mortality and reduction in transcription levels. Furthermore, we down-regulated the V-ATPase E gene of S. levis in transgenic sugarcane using an RNAi approach. The resultant RNAi transgenic lines exhibited reduction in larval growth and survival, without compromising plant performance under controlled environment. Our results illustrate that RNAi-mediated down-regulation of key genes is a promising approach in imparting resistance to sugarcane weevil.
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Affiliation(s)
- Chakravarthi Mohan
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, SP, Brazil
| | | | | | - Danyelle Toyama
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, SP, Brazil
| | | | - Antonio Figueira
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, Brazil
| | - Danielle Scotton
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, Brazil
| | - Andrea Soares-Costa
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Flavio Henrique-Silva
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, SP, Brazil.
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Jaiwal A, Natarajaswamy K, Rajam MV. RNA silencing of hormonal biosynthetic genes impairs larval growth and development in cotton bollworm, Helicoverpa armigera. J Biosci 2020. [DOI: 10.1007/s12038-020-00079-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dias NP, Cagliari D, Dos Santos EA, Smagghe G, Jurat-Fuentes JL, Mishra S, Nava DE, Zotti MJ. Insecticidal Gene Silencing by RNAi in the Neotropical Region. NEOTROPICAL ENTOMOLOGY 2020; 49:1-11. [PMID: 31749122 DOI: 10.1007/s13744-019-00722-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 09/22/2019] [Indexed: 06/10/2023]
Abstract
Insecticidal gene silencing by RNA interference (RNAi) involves a post-transcriptional mechanism with great potential for insect control. Here, we aim to summarize the progress on RNAi research toward control of insect pests in the Neotropical region and discuss factors determining its efficacy and prospects for pest management. We include an overview of the available RNAi information for Neotropical pests in the Lepidoptera, Coleoptera, Diptera, and Hemiptera orders. Emphasis is put on significant findings in the use of RNAi against relevant Neotropical pests, including diamondback moth (Plutella xylostella L.), Asian citrus psyllid (Diaphorina citri Kuwayama), and the cotton boll weevil (Anthonomus grandis Boheman). We also examine the main factors involved in insecticidal RNAi efficiency and major advances to improve screening of lethal genes, formulation, and delivery. Few studies detail resistance mechanisms to RNAi, demonstrating a need for more research. Advances in formulation, delivery, and resistance management tools for insecticidal RNAi in the Neotropics can provide a basis for efficient field application.
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Affiliation(s)
- N P Dias
- Dept of Crop Protection, Federal Univ of Pelotas, Pelotas, Brazil.
| | - D Cagliari
- Dept of Crop Protection, Federal Univ of Pelotas, Pelotas, Brazil
| | - E A Dos Santos
- Dept of Crop Protection, Federal Univ of Pelotas, Pelotas, Brazil
| | - G Smagghe
- Dept of Plants and Crops, Ghent Univ, Ghent, Belgium
| | - J L Jurat-Fuentes
- Dept of Entomology and Plant Pathology, The Univ of Tennessee, Knoxville, USA
| | - S Mishra
- Dept of Entomology and Plant Pathology, The Univ of Tennessee, Knoxville, USA
| | - D E Nava
- Entomology Lab, EmbrapaClima Temperado, Pelotas, Brasil
| | - M J Zotti
- Dept of Crop Protection, Federal Univ of Pelotas, Pelotas, Brazil.
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Rana S, Rajurkar AB, Kumar KK, Mohankumar S. Comparative Analysis of Chitin SynthaseA dsRNA Mediated RNA Interference for Management of Crop Pests of Different Families of Lepidoptera. FRONTIERS IN PLANT SCIENCE 2020; 11:427. [PMID: 32362904 PMCID: PMC7182115 DOI: 10.3389/fpls.2020.00427] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 03/24/2020] [Indexed: 05/10/2023]
Abstract
RNA interference (RNAi) is a sequence-specific down-regulation in the expression of a particular gene, induced by double-stranded RNA (dsRNA). Feeding of dsRNA either directly or through transgenic plants expressing dsRNA of insect genes has been proven successful against lepidopteran and coleopteran pests, establishing an additional alternative to control insect pests. Lepidopteran crop pests including Spodoptera litura (Fabricius) (Noctuidae), Chilo partellus (Swinhoe) (Crambidae), Plutella xylostella (Linnaeus) (Plutellidae), and Maruca vitrata (Fabricius) (Pyralidae) are the devastating pests of a variety of crops. To tap the potential of RNAi against insect pests, a gene coding for the key enzyme in chitin biosynthesis in arthropods, the chitin synthaseA (CHSA), has been targeted through an exogenous delivery of dsRNA and plant-mediated RNAi. The introduction of dsCHSA caused "Half ecdysis" and "Black body" type lethal phenotypes and a significant reduction in larval body weight. Subsequent RT-qPCR analysis demonstrated the down-regulation of CHSA gene transcripts from 1.38- to 8.33-fold in the four target species. Meanwhile, when S. litura larvae fed with leaves of transgenic tobacco plants expressing dsSlCHSA, the mRNA abundance of CHSA gene was significantly decreased resulting in lethal phenotypes like "Double head formation," "Half ecdysis," and "Black body." In addition, abnormalities in pupal-adult and adult stage were also documented, strongly suggesting the RNAi effect of CHSA gene at late developmental stages. Overall, the results demonstrated that CHSA gene expression in Lepidopteran crop pests could be suppressed by application of dsRNA either as feeding or through transgenic crop plants.
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8
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Sharath Chandra G, Asokan R, Manamohan M, Krishna Kumar N. Enhancing RNAi by using concatemerized double-stranded RNA. PEST MANAGEMENT SCIENCE 2019; 75:506-514. [PMID: 30039906 DOI: 10.1002/ps.5149] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 05/11/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND RNA interference (RNAi) is a potential tool for functional characterization of genes and also in the management of insect pests. Accumulated literature reveals that the RNAi efficiency varies among insect species and is reported to be less efficient in lepidopteran insects. RESULTS We attempted to enhance RNAi efficiency by concatemerizing short double-stranded RNA (dsRNA) sequence. Then the effectiveness of concatemerized dsRNAs (C-dsRNAs) was compared with non-concatemerized long dsRNA (NCL-dsRNA) in silencing of acetylcholinesterase (AChE) in the diamondback moth, Plutella xylostella (Lepidoptera), a major pest on cruciferous vegetables. Results revealed that the C-dsRNAs enhanced the RNAi efficiency in terms of higher target gene silencing and consequently resulted in lower larval weight gain and higher mortality compared to the NCL-dsRNA treatment. Even the lower concentration (0.5 µg) of C-dsRNAs had a relatively similar effect to that of higher concentrations (2 µg) of NCL-dsRNA. The enhanced RNAi efficiency with C-dsRNAs was plausibly due to the higher expression of core RNAi pathway genes, Dicer-2 and Argonaute-2 (Ago-2), which are known to govern the efficiency of RNAi. CONCLUSION Overall, C-dsRNA enhanced the RNAi activity over routinely used long dsRNA in P. xylostella and this strategy may be applied for effective management of insect pests. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Gaddelapati Sharath Chandra
- Division of Biotechnology, Indian Institute of Horticultural Research (IIHR), Hesaraghatta Lake (PO), Bengaluru, India
| | - Ramaswamy Asokan
- Division of Biotechnology, Indian Institute of Horticultural Research (IIHR), Hesaraghatta Lake (PO), Bengaluru, India
| | - Maligeppagol Manamohan
- Division of Biotechnology, Indian Institute of Horticultural Research (IIHR), Hesaraghatta Lake (PO), Bengaluru, India
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Bally J, Fishilevich E, Bowling AJ, Pence HE, Narva KE, Waterhouse PM. Improved insect-proofing: expressing double-stranded RNA in chloroplasts. PEST MANAGEMENT SCIENCE 2018; 74:1751-1758. [PMID: 29377554 PMCID: PMC6055657 DOI: 10.1002/ps.4870] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/19/2018] [Accepted: 01/19/2018] [Indexed: 05/11/2023]
Abstract
RNA interference (RNAi) was discovered almost 20 years ago and has been exploited worldwide to silence genes in plants and animals. A decade later, it was found that transforming plants with an RNAi construct targeting an insect gene could protect the plant against feeding by that insect. Production of double-stranded RNA (dsRNA) in a plant to affect the viability of a herbivorous animal is termed trans-kingdom RNAi (TK-RNAi). Since this pioneering work, there have been many further examples of successful TK-RNAi, but also reports of failed attempts and unrepeatable experiments. Recently, three laboratories have shown that producing dsRNA in a plant's chloroplast, rather than in its cellular cytoplasm, is a very effective way of delivering TK-RNAi. Our review examines this potentially game-changing approach and compares it with other transgenic insect-proofing schemes. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Julia Bally
- Centre for Tropical Crops and BiocommoditiesQUT, Brisbane, QLDAustralia
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Chen QW, Jin S, Zhang L, Shen QD, Wei P, Wei ZM, Wang SG, Tang B. Regulatory functions of trehalose-6-phosphate synthase in the chitin biosynthesis pathway in Tribolium castaneum (Coleoptera: Tenebrionidae) revealed by RNA interference. BULLETIN OF ENTOMOLOGICAL RESEARCH 2018; 108:388-399. [PMID: 28920565 DOI: 10.1017/s000748531700089x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
RNA interference (RNAi) is a very effective technique for studying gene function and may be an efficient method for controlling pests. Trehalose-6-phosphate synthase (TPS), which plays a key role in the synthesis of trehalose and insect development, was cloned in Tribolium castaneum (Herbst) (TcTPS) and the putative functions were studied using RNAi via the injection of double-stranded RNA (dsRNA) corresponding to conserved TPS and trehalose-6-phosphate phosphatase domains. Expression analyses show that TcTPS is expressed higher in the fat body, while quantitative real-time polymerase chain reaction results show that the expression of four trehalase isoforms was significantly suppressed by dsTPS injection. Additionally, the expression of six chitin synthesis-related genes, such as hexokinase 2 and glutamine-fructose-6-phosphate aminotransferase, was suppressed at 48 and 72 h post-dsTPS-1 and dsTPS-2 RNA injection, which were two dsTPS fragments that had been designed for two different locations in TcTPS open reading frame, and that trehalose content and trehalase 1 activity decreased significantly at 72 h post-dsRNA injection. Furthermore, T. castaneum injected with dsTPS-1 and dsTPS-2 RNA displayed significantly lower levels of chitin and could not complete the molting process from larvae to pupae, revealing abnormal molting phenotypes. These results demonstrate that silencing TPS gene leads to molting deformities and high mortality rates via regulation of gene expression in the chitin biosynthetic pathway, and may be a promising approach for pest control in the future.
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Affiliation(s)
- Q W Chen
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
| | - S Jin
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
| | - L Zhang
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
| | - Q D Shen
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
| | - P Wei
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
| | - Z M Wei
- College of Life Sciences,Shaanxi Normal University,Xi'an,Shaanxi 710119,China
| | - S G Wang
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
| | - B Tang
- Hangzhou Key Laboratory of Animal Adaptation and Evolution,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou,Zhejiang 310036,China
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Saini RP, Raman V, Dhandapani G, Malhotra EV, Sreevathsa R, Kumar PA, Sharma TR, Pattanayak D. Silencing of HaAce1 gene by host-delivered artificial microRNA disrupts growth and development of Helicoverpa armigera. PLoS One 2018; 13:e0194150. [PMID: 29547640 PMCID: PMC5856398 DOI: 10.1371/journal.pone.0194150] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 02/26/2018] [Indexed: 01/19/2023] Open
Abstract
The polyphagous insect-pest, Helicoverpa armigera, is a serious threat to a number of economically important crops. Chemical application and/or cultivation of Bt transgenic crops are the two strategies available now for insect-pest management. However, environmental pollution and long-term sustainability are major concerns against these two options. RNAi is now considered as a promising technology to complement Bt to tackle insect-pests menace. In this study, we report host-delivered silencing of HaAce1 gene, encoding the predominant isoform of H. armigera acetylcholinesterase, by an artificial microRNA, HaAce1-amiR1. Arabidopsis pre-miRNA164b was modified by replacing miR164b/miR164b* sequences with HaAce1-amiR1/HaAce1-amiR1* sequences. The recombinant HaAce1-preamiRNA1 was put under the control of CaMV 35S promoter and NOS terminator of plant binary vector pBI121, and the resultant vector cassette was used for tobacco transformation. Two transgenic tobacco lines expressing HaAce1-amiR1 was used for detached leaf insect feeding bioassays. Larval mortality of 25% and adult deformity of 20% were observed in transgenic treated insect group over that control tobacco treated insect group. The reduction in the steady-state level of HaAce1 mRNA was 70-80% in the defective adults compared to control. Our results demonstrate promise for host-delivered amiRNA-mediated silencing of HaAce1 gene for H. armigera management.
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Affiliation(s)
- Ravi Prakash Saini
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Venkat Raman
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Gurusamy Dhandapani
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Era Vaidya Malhotra
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Rohini Sreevathsa
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | | | - Tilak R. Sharma
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Debasis Pattanayak
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
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12
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Vatanparast M, Kazzazi M, Mirzaie-Asl A, Hosseininaveh V. RNA interference-mediated knockdown of some genes involved in digestion and development of Helicoverpa armigera. BULLETIN OF ENTOMOLOGICAL RESEARCH 2017; 107:777-790. [PMID: 28482938 DOI: 10.1017/s0007485317000293] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Helicoverpa armigera is a significant agricultural pest and particularly notorious for its resistance to many types of common insecticides. RNA interference (RNAi) is a mechanism of post-transcriptional gene silencing and trigged by double-strand RNA (dsRNA), has become a widely used reverse genetics and potent tool for insect pest control. In this study, the effect of ingestion and injection delivery methods of dsRNA related two important enzyme genes, α-amylase (HaAMY48, Ha-AMY49) and juvenile hormone esterase (Ha-JHE), were examined on growth and development of H. armigera. After 24, 48, 72 and 96 h of feeding bioassay, significant down regulation was observed about; 56, 68, 78, 80.75% for HaAMY48, 60, 70, 86.5 and 96.75%, for Ha-AMY49 and 14, 27.5, 23 and 31.7% for Ha-JHE, respectively. The results for injection assay was 61.5, 71.5, 74 and 95.8% for Ha-AMY48; 70, 88, 91.5 and 97.7% for Ha-AMY49 and 22, 61, 75 and 74% for Ha-JHE after 24, 48 and 72 h of last injecting, respectively. Larvae that treated with dsRNA, fed or injected, lost more than half of their weight. 50% mortality in treated larvae was observed in the case injection bioassay with dsHa-JHE and 59% of larvae that fed of dsRNA-treated cubes survived. DsHa-AMY48 and 49 have significant mortality, but mixing of them is more effective in both bioassays. Injection bioassay has a potent inhibitory effect on α-amylase-specific activity about more than 87% in treated larvae with mix of dsHa-AMY48 and 49. Adult malformation percent was evaluated for feeding (28, 35.5 and 43% for Ha-AMY48, 49 and Ha-JHE, respectively) and injection bioassay (23, 42 and 29% for Ha-AMY48, 49 and Ha-JHE, respectively). All these finding suggest that Ha-AMY48, Ha-AMY49 and Ha-JHE can be new candidates to scheming effective dsRNAs pesticide for H. armigera control.
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Affiliation(s)
- M Vatanparast
- Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - M Kazzazi
- Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - A Mirzaie-Asl
- Department of Biotechnology, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - V Hosseininaveh
- Department of Plant Protection, College of Agriculture, University of Tehran, Karaj, Iran
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Double-Stranded RNA-Mediated Suppression of Trypsin-Like Serine Protease (t-SP) Triggers Over-Expression of Another t-SP Isoform in Helicoverpa armigera. Appl Biochem Biotechnol 2017; 184:746-761. [DOI: 10.1007/s12010-017-2584-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 08/15/2017] [Indexed: 10/19/2022]
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Israni B, Rajam MV. Silencing of ecdysone receptor, insect intestinal mucin and sericotropin genes by bacterially produced double-stranded RNA affects larval growth and development in Plutella xylostella and Helicoverpa armigera. INSECT MOLECULAR BIOLOGY 2017; 26:164-180. [PMID: 27883266 DOI: 10.1111/imb.12277] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
RNA interference mediated gene silencing, which is triggered by double-stranded RNA (dsRNA), has become a important tool for functional genomics studies in various systems, including insects. Bacterially produced dsRNA employs the use of a bacterial strain lacking in RNaseIII activity and harbouring a vector with dual T7 promoter sites, which allow the production of intact dsRNA molecules. Here, we report an assessment of the functional relevance of the ecdysone receptor, insect intestinal mucin and sericotropin genes through silencing by dsRNA in two lepidopteran insect pests, Helicoverpa armigera and Plutella xylostella, both of which cause serious crop losses. Oral feeding of dsRNA led to significant reduction in transcripts of the target insect genes, which caused significant larval mortality with various moulting anomalies and an overall developmental delay. We also found a significant decrease in reproductive potential in female moths, with a drop in egg laying and compromised egg hatching from treated larvae as compared to controls. dsRNA was stable in the insect gut and was efficiently processed into small interfering RNAs (siRNAs), thus accounting for the phenotypes observed in the present work. The study revealed the importance of these genes in core insect processes, which are essential for insect development and survival.
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Affiliation(s)
- B Israni
- Department of Genetics, University of Delhi South Campus, New Delhi, India
| | - M V Rajam
- Department of Genetics, University of Delhi South Campus, New Delhi, India
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15
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Chikate YR, Dawkar VV, Barbole RS, Tilak PV, Gupta VS, Giri AP. RNAi of selected candidate genes interrupts growth and development of Helicoverpa armigera. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2016; 133:44-51. [PMID: 27742360 DOI: 10.1016/j.pestbp.2016.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 03/10/2016] [Accepted: 03/16/2016] [Indexed: 06/06/2023]
Abstract
Helicoverpa armigera is one of the major crop pests and is less amenable to current pest control approaches. RNA interference (RNAi) is emerging as a potent arsenal for the insect pest control over current methods. Here, we examined the effect on growth and development in H. armigera by targeting various enzymes/proteins such as proteases like trypsins (HaTry2, 3, 4 and 6), chymotrypsin (HaChy4) and cysteine protease like cathepsin (HaCATHL); glutathione S-transferases (HaGST1a, 6 and 8); esterases (HaAce4, HaJHE); catalase (HaCAT); super-oxide-dismutase (HaCu/ZnSOD); fatty acid binding protein (HaFabp) and chitin deacetylase (HaCda5b) through dsRNA approach. Significant downregulation of cognate mRNA expression and reduced activity of trypsin and GST-like enzyme were evident upon feeding candidate dsRNAs to the larvae. Among these, the highest mortality was observed in HaAce4 dsRNA fed larvae followed by HaJHE; HaCAT; HaCuZnSOD; HaFabp and HaTry3 whereas remaining ones showed relatively lower mortality. Furthermore, the dsRNA fed larvae showed significant reduction in the larval mass and abnormalities at the different stages of H. armigera development compared to their control diets. For example, malformed larvae, pupae and moth at a dose of 60μg/day were evident in high number of individual insects fed on dsRNA containing diets. Moreover, the growth and development of insects and moths were retarded in dsRNA fed larvae. These findings might provide potential new candidates for designing effective dsRNA as pesticide in crop protection.
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Affiliation(s)
- Yojana R Chikate
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, (MS), India
| | - Vishal V Dawkar
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, (MS), India
| | - Ranjit S Barbole
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, (MS), India
| | - Priyadarshini V Tilak
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, (MS), India
| | - Vidya S Gupta
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, (MS), India
| | - Ashok P Giri
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, (MS), India.
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16
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Fu KY, Li Q, Zhou LT, Meng QW, Lü FG, Guo WC, Li GQ. Knockdown of juvenile hormone acid methyl transferase severely affects the performance of Leptinotarsa decemlineata (Say) larvae and adults. PEST MANAGEMENT SCIENCE 2016; 72:1231-1241. [PMID: 26299648 DOI: 10.1002/ps.4103] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Revised: 07/22/2015] [Accepted: 08/13/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Juvenile hormone (JH) plays a critical role in the regulation of metamorphosis in Leptinotarsa decemlineata, a notorious defoliator of potato. JH acid methyltransferase (JHAMT) is involved in one of the final steps of JH biosynthesis. RESULTS A putative JHAMT cDNA (LdJHAMT) was cloned. Two double-stranded RNAs (dsRNAs) (dsJHAMT1 and dsJHAMT2) against LdJHAMT were constructed and bacterially expressed. Experiments were conducted to investigate the effectiveness of RNAi in both second- and fourth-instar larvae. Dietary introduction of dsJHAMT1 and dsJHAMT2 successfully knocked down the target gene, lowered JH titre in the haemolymph and reduced the transcript of Krüppel homologue 1 gene. Ingestion of dsJHAMT caused larval death and weight loss, shortened larval developmental period and impaired pupation. Moreover, the dsJHAMT-fed pupae exhibited lower adult emergence rates. The resulting adults weighed an average of 50 mg less than the control group, and the females did not deposit eggs. Application of pyriproxyfen to the dsJHAMT-fed insects rescued all the negative effects. CONCLUSIONS LdJHAMT expresses functional JHAMT enzyme. The RNAi targeting LdJHAMT could be used for control of L. decemlineata. © 2015 Society of Chemical Industry.
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Affiliation(s)
- Kai-Yun Fu
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qian Li
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Li-Tao Zhou
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qing-Wei Meng
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Feng-Gong Lü
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Wen-Chao Guo
- Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Guo-Qing Li
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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Lim ZX, Robinson KE, Jain RG, Chandra GS, Asokan R, Asgari S, Mitter N. Diet-delivered RNAi in Helicoverpa armigera--Progresses and challenges. JOURNAL OF INSECT PHYSIOLOGY 2016; 85:86-93. [PMID: 26549127 DOI: 10.1016/j.jinsphys.2015.11.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/02/2015] [Accepted: 11/04/2015] [Indexed: 05/03/2023]
Abstract
Helicoverpa armigera (the cotton bollworm) is a significant agricultural pest endemic to Afro-Eurasia and Oceania. Gene suppression via RNA interference (RNAi) presents a potential avenue for management of the pest, which is highly resistant to traditional insecticide sprays. This article reviews current understanding on the fate of ingested double-stranded RNA in H. armigera. Existing in vivo studies on diet-delivered RNAi and their effects are summarized and followed by a discussion on the factors and hurdles affecting the efficacy of diet-delivered RNAi in H. armigera.
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Affiliation(s)
- Zhi Xian Lim
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Karl E Robinson
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Ritesh G Jain
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St Lucia, Queensland 4072, Australia
| | - G Sharath Chandra
- Division of Biotechnology, Indian Institute of Horticultural Research (IIHR), Hesaraghatta Lake Post, Bengaluru 560 089, India
| | - R Asokan
- Division of Biotechnology, Indian Institute of Horticultural Research (IIHR), Hesaraghatta Lake Post, Bengaluru 560 089, India
| | - Sassan Asgari
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Neena Mitter
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St Lucia, Queensland 4072, Australia.
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Mamta, Reddy KRK, Rajam MV. Targeting chitinase gene of Helicoverpa armigera by host-induced RNA interference confers insect resistance in tobacco and tomato. PLANT MOLECULAR BIOLOGY 2016; 90:281-92. [PMID: 26659592 DOI: 10.1007/s11103-015-0414-y] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 11/27/2015] [Indexed: 05/03/2023]
Abstract
Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is a devastating agricultural insect pest with broad spectrum of host range, causing million dollars crop loss annually. Limitations in the present conventional and transgenic approaches have made it crucial to develop sustainable and environmental friendly methods for crop improvement. In the present study, host-induced RNA interference (HI-RNAi) approach was used to develop H. armigera resistant tobacco and tomato plants. Chitinase (HaCHI) gene, critically required for insect molting and metamorphosis was selected as a potential target. Hair-pin RNAi construct was prepared from the conserved off-target free partial HaCHI gene sequence and was used to generate several HaCHI-RNAi tobacco and tomato plants. Northern hybridization confirmed the production of HaCHI gene-specific siRNAs in HaCHI-RNAi tobacco and tomato lines. Continuous feeding on leaves of RNAi lines drastically reduced the target gene transcripts and consequently, affected the overall growth and survival of H. armigera. Various developmental deformities were also manifested in H. armigera larvae after feeding on the leaves of RNAi lines. These results demonstrated the role of chitinase in insect development and potential of HI-RNAi for effective management of H. armigera.
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Affiliation(s)
- Mamta
- Department of Genetics, University of Delhi South Campus, Benito Juarez Marg, New Delhi, 110021, India
| | - K R K Reddy
- Sri Biotech Laboratory India Ltd., Street No. 2, Sagar Society, Road No. 2, Banjara Hills, Hyderabad, 500034, India
| | - M V Rajam
- Department of Genetics, University of Delhi South Campus, Benito Juarez Marg, New Delhi, 110021, India.
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Sharath Chandra G, Asokan R, Manamohan M, Krishna Kumar NK, Sita T. Evaluation of reference genes for quantitative real-time PCR normalization in cotton bollworm Helicoverpa armigera. Mol Biol 2014. [DOI: 10.1134/s0026893314060156] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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20
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Nandety RS, Kamita SG, Hammock BD, Falk BW. Sequencing and de novo assembly of the transcriptome of the glassy-winged sharpshooter (Homalodisca vitripennis). PLoS One 2013; 8:e81681. [PMID: 24339955 PMCID: PMC3858241 DOI: 10.1371/journal.pone.0081681] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 10/15/2013] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The glassy-winged sharpshooter Homalodisca vitripennis (Hemiptera: Cicadellidae), is a xylem-feeding leafhopper and important vector of the bacterium Xylella fastidiosa; the causal agent of Pierce's disease of grapevines. The functional complexity of the transcriptome of H. vitripennis has not been elucidated thus far. It is a necessary blueprint for an understanding of the development of H. vitripennis and for designing efficient biorational control strategies including those based on RNA interference. RESULTS Here we elucidate and explore the transcriptome of adult H. vitripennis using high-throughput paired end deep sequencing and de novo assembly. A total of 32,803,656 paired-end reads were obtained with an average transcript length of 624 nucleotides. We assembled 32.9 Mb of the transcriptome of H. vitripennis that spanned across 47,265 loci and 52,708 transcripts. Comparison of our non-redundant database showed that 45% of the deduced proteins of H. vitripennis exhibit identity (e-value ≤1(-5)) with known proteins. We assigned Gene Ontology (GO) terms, Kyoto Encyclopedia of Genes and Genomes (KEGG) annotations, and potential Pfam domains to each transcript isoform. In order to gain insight into the molecular basis of key regulatory genes of H. vitripennis, we characterized predicted proteins involved in the metabolism of juvenile hormone, and biogenesis of small RNAs (Dicer and Piwi sequences) from the transcriptomic sequences. Analysis of transposable element sequences of H. vitripennis indicated that the genome is less expanded in comparison to many other insects with approximately 1% of the transcriptome carrying transposable elements. CONCLUSIONS Our data significantly enhance the molecular resources available for future study and control of this economically important hemipteran. This transcriptional information not only provides a more nuanced understanding of the underlying biological and physiological mechanisms that govern H. vitripennis, but may also lead to the identification of novel targets for biorationally designed control strategies.
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Affiliation(s)
- Raja Sekhar Nandety
- Department of Plant Pathology, University of California Davis, Davis, California, United States of America
| | - Shizuo G. Kamita
- Department of Entomology and UC Davis Comprehensive Cancer Research Center, University of California Davis, Davis, California, United States of America
| | - Bruce D. Hammock
- Department of Entomology and UC Davis Comprehensive Cancer Research Center, University of California Davis, Davis, California, United States of America
| | - Bryce W. Falk
- Department of Plant Pathology, University of California Davis, Davis, California, United States of America
- * E-mail:
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