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Renukadevi P, Devi RG, Jothika C, Karthikeyan G, Malathi VG, Balakrishnan N, Rajagopal B, Nakkeeran S, Abd-Allah EF. Genomic distinctiveness and recombination in tomato leaf curl New Delhi virus (ToLCNDV-BG) isolates infecting bitter gourd. 3 Biotech 2024; 14:184. [PMID: 39070236 PMCID: PMC11282025 DOI: 10.1007/s13205-024-04009-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 05/14/2024] [Indexed: 07/30/2024] Open
Abstract
There are two begomoviruses, tomato leaf curl New Delhi virus (ToLCNDV) and bitter gourd yellow mosaic virus (BgYMV) infecting bitter gourd in India. An extensive survey conducted from 2019 to 2022 clearly established that infection by ToLCNDV is more predominant (92.43%) than BgYMV (44%). The ToLCNDV isolates infecting bitter gourd shared only 88% identity in the DNA-A component with other ToLCNDV isolates and were found to be a distinct variant. The predicted amino acid sequence of the viral proteins, replication initiation protein, coat protein, and the symptom determinant protein in the study isolates are markedly different. Especially the RCR motif I and RCR motif III are different from other geminiviruses. Infectivity of cloned components of one of the isolates ToLCNDV-BG NP was demonstrated in bitter gourd. Recombination analysis clearly revealed that the study isolates are recombinants with the major parent predicted as squash leaf curl Yunnan virus (GenBank Accession Number: MK064241) and the minor parent as ToLCNDV from Pakistan (GenBank Accession Number: AM747291). Due to distinct genomic features and less than 90% identity with the majority of ToLCNDV isolates, the study isolates deserve to be raised to the status of a distinct strain, designated as ToLCNDV-BG. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-024-04009-3.
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Affiliation(s)
- P. Renukadevi
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - R. Gomathi Devi
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - C. Jothika
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - G. Karthikeyan
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - V. G. Malathi
- GI, Sree Kumaran Hill Crest Apartment, Coimbatore, Tamil Nadu 641046 India
| | - N. Balakrishnan
- Directorate of Research, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641003 India
| | - B. Rajagopal
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641003 India
| | - S. Nakkeeran
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - Elsayed Fathi Abd-Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, 11451 Riyadh, Saudi Arabia
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Khan ZA, Gupta K, Dasgupta I. Transient expression analysis of promoters of okra enation leaf curl virus in Nicotiana benthamiana, cotton and okra plants. Virus Genes 2024; 60:412-422. [PMID: 38727968 DOI: 10.1007/s11262-024-02074-7] [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: 03/25/2024] [Accepted: 04/22/2024] [Indexed: 07/13/2024]
Abstract
Viral promoters can be used to drive heterologous gene expression in transgenic plants. As part of our quest to look for new promoters, we have explored, for the first time, the promoters of okra enation leaf curl virus (OELCuV), a begomovirus infecting okra (Abelmoschus esculentus). The Rep and CP promoters of OELCuV fused with the gfp reporter gene, were expressed transiently in the natural host okra and the laboratory host cotton and Nicotiana benthamiana. The expression levels of the promoters were quantified through confocal laser scanning microscopy and GFP assay in N. benthamiana and okra. The results indicated that the Rep promoter was more active than the CP promoter, whose activity was similar to that of CaMV 35S promoter. Additionally, the Rep and CP promoters showed increase of expression, probably due to transactivation, when assayed following inoculation of OELCuV and betasatellite DNAs in cotton plants. A moderate increase in promoter activity in N. benthamiana was also seen, when assayed following the inoculation of the heterologous begomovirus Sri Lankan cassava mosaic virus.
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Affiliation(s)
- Zainul A Khan
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, 110021, India
| | - Kanika Gupta
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, 110021, India
| | - Indranil Dasgupta
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, 110021, India.
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3
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Martínez-Fajardo C, Navarro-Simarro P, Morote L, Rubio-Moraga Á, Mondéjar-López M, Niza E, Argandoña J, Ahrazem O, Gómez-Gómez L, López-Jiménez AJ. Exploring the viral landscape of saffron through metatranscriptomic analysis. Virus Res 2024; 345:199389. [PMID: 38714217 PMCID: PMC11101869 DOI: 10.1016/j.virusres.2024.199389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 05/03/2024] [Accepted: 05/03/2024] [Indexed: 05/09/2024]
Abstract
Saffron (Crocus sativus L.), a historically significant crop valued for its nutraceutical properties, has been poorly explored from a phytosanitary perspective. This study conducted a thorough examination of viruses affecting saffron samples from Spanish cultivars, using high-throughput sequencing alongside a systematic survey of transcriptomic datasets from Crocus sativus at the Sequence Read Archive. Our analysis unveiled a broad diversity and abundance, identifying 17 viruses across the 52 analyzed libraries, some of which were highly prevalent. This includes known saffron-infecting viruses and previously unreported ones. In addition, we discovered 7 novel viruses from the Alphaflexiviridae, Betaflexiviridae, Potyviridae, Solemoviridae, and Geminiviridae families, with some present in libraries from various locations. These findings indicate that the saffron-associated virome is more complex than previously reported, emphasizing the potential of phytosanitary analysis to enhance saffron productivity.
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Affiliation(s)
- Cristian Martínez-Fajardo
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain
| | - Pablo Navarro-Simarro
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain
| | - Lucía Morote
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain
| | - Ángela Rubio-Moraga
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain; Escuela Técnica Superior de Ingeniería Agronómica y de Montes y Biotecnología. Departamento de Ciencia y Tecnología Agroforestal y Genética. Universidad de Castilla-La Mancha, Albacete, Spain
| | - María Mondéjar-López
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain
| | - Enrique Niza
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain; Facultad de Farmacia. Departamento de Ciencia y Tecnología Agroforestal y Genética. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain
| | - Javier Argandoña
- Escuela Técnica Superior de Ingeniería Agronómica y de Montes y Biotecnología. Departamento de Ciencia y Tecnología Agroforestal y Genética. Universidad de Castilla-La Mancha, Albacete, Spain
| | - Oussama Ahrazem
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain; Escuela Técnica Superior de Ingeniería Agronómica y de Montes y Biotecnología. Departamento de Ciencia y Tecnología Agroforestal y Genética. Universidad de Castilla-La Mancha, Albacete, Spain
| | - Lourdes Gómez-Gómez
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain; Facultad de Farmacia. Departamento de Ciencia y Tecnología Agroforestal y Genética. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain
| | - Alberto José López-Jiménez
- Instituto Botánico. Universidad de Castilla-La Mancha, Campus Universitario s/n, Albacete 02071, Spain; Escuela Técnica Superior de Ingeniería Agronómica y de Montes y Biotecnología. Departamento de Ciencia y Tecnología Agroforestal y Genética. Universidad de Castilla-La Mancha, Albacete, Spain.
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4
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Ramulifho E, Rey C. A Coiled-Coil Nucleotide-Binding Domain Leucine-Rich Repeat Receptor Gene MeRPPL1 Plays a Role in the Replication of a Geminivirus in Cassava. Viruses 2024; 16:941. [PMID: 38932233 PMCID: PMC11209366 DOI: 10.3390/v16060941] [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: 01/19/2024] [Revised: 05/14/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Disease resistance gene (R gene)-encoded nucleotide-binding leucine-rich repeat proteins (NLRs) are critical players in plant host defence mechanisms because of their role as receptors that recognise pathogen effectors and trigger plant effector-triggered immunity (ETI). This study aimed to determine the putative role of a cassava coiled-coil (CC)-NLR (CNL) gene MeRPPL1 (Manes.12G091600) (single allele) located on chromosome 12 in the tolerance or susceptibility to South African cassava mosaic virus (SACMV), one of the causal agents of cassava mosaic disease (CMD). A transient protoplast system was used to knock down the expression of MeRPPL1 by clustered regularly interspaced short palindromic repeats-CRISPR-associated protein 9 (CRISPR-Cas9). The MeRPPL1-targeting CRISPR vectors and/or SACMV DNA A and DNA B infectious clones were used to transfect protoplasts isolated from leaf mesophyll cells from the SACMV-tolerant cassava (Manihot esculenta) cultivar TME3. The CRISPR/Cas9 silencing vector significantly reduced MeRPPL1 expression in protoplasts whether with or without SACMV co-infection. Notably, SACMV DNA A replication was higher in protoplasts with lower MeRPPL1 expression levels than in non-silenced protoplasts. Mutagenesis studies revealed that protoplast co-transfection with CRISPR-MeRPPL1 silencing vector + SACMV and transfection with only SACMV induced nucleotide substitution mutations that led to altered amino acids in the highly conserved MHD motif of the MeRPPL1-translated polypeptide. This may abolish or alter the regulatory role of the MHD motif in controlling R protein activity and could contribute to the increase in SACMV-DNA A accumulation observed in MeRPPL1-silenced protoplasts. The results herein demonstrate for the first time a role for a CNL gene in tolerance to a geminivirus in TME3.
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Affiliation(s)
- Elelwani Ramulifho
- Plant Biotechnology Laboratory, School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg 2001, South Africa;
- Germplasm Development, Agricultural Research Council, Small Grain Institute, Bethlehem 9700, South Africa
| | - Chrissie Rey
- Plant Biotechnology Laboratory, School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg 2001, South Africa;
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Kamal H, Zafar MM, Razzaq A, Parvaiz A, Ercisli S, Qiao F, Jiang X. Functional role of geminivirus encoded proteins in the host: Past and present. Biotechnol J 2024; 19:e2300736. [PMID: 38900041 DOI: 10.1002/biot.202300736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/19/2024] [Accepted: 04/16/2024] [Indexed: 06/21/2024]
Abstract
During plant-pathogen interaction, plant exhibits a strong defense system utilizing diverse groups of proteins to suppress the infection and subsequent establishment of the pathogen. However, in response, pathogens trigger an anti-silencing mechanism to overcome the host defense machinery. Among plant viruses, geminiviruses are the second largest virus family with a worldwide distribution and continue to be production constraints to food, feed, and fiber crops. These viruses are spread by a diverse group of insects, predominantly by whiteflies, and are characterized by a single-stranded DNA (ssDNA) genome coding for four to eight proteins that facilitate viral infection. The most effective means to managing these viruses is through an integrated disease management strategy that includes virus-resistant cultivars, vector management, and cultural practices. Dynamic changes in this virus family enable the species to manipulate their genome organization to respond to external changes in the environment. Therefore, the evolutionary nature of geminiviruses leads to new and novel approaches for developing virus-resistant cultivars and it is essential to study molecular ecology and evolution of geminiviruses. This review summarizes the multifunctionality of each geminivirus-encoded protein. These protein-based interactions trigger the abrupt changes in the host methyl cycle and signaling pathways that turn over protein normal production and impair the plant antiviral defense system. Studying these geminivirus interactions localized at cytoplasm-nucleus could reveal a more clear picture of host-pathogen relation. Data collected from this antagonistic relationship among geminivirus, vector, and its host, will provide extensive knowledge on their virulence mode and diversity with climate change.
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Affiliation(s)
- Hira Kamal
- Department of Plant Pathology, Washington State University, Pullman, Washington, USA
| | - Muhammad Mubashar Zafar
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Abdul Razzaq
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Aqsa Parvaiz
- Department of Biochemistry and Biotechnology, The Women University Multan, Multan, Pakistan
| | - Sezai Ercisli
- Department of Horticulture, Faculty of Agriculture, Ataturk University, Erzurum, Turkey
| | - Fei Qiao
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Xuefei Jiang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
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Kamal H, Zafar MM, Parvaiz A, Razzaq A, Elhindi KM, Ercisli S, Qiao F, Jiang X. Gossypium hirsutum calmodulin-like protein (CML 11) interaction with geminivirus encoded protein using bioinformatics and molecular techniques. Int J Biol Macromol 2024; 269:132095. [PMID: 38710255 DOI: 10.1016/j.ijbiomac.2024.132095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 03/24/2024] [Accepted: 05/03/2024] [Indexed: 05/08/2024]
Abstract
Plant viruses are the most abundant destructive agents that exist in every ecosystem, causing severe diseases in multiple crops worldwide. Currently, a major gap is present in computational biology determining plant viruses interaction with its host. We lay out a strategy to extract virus-host protein interactions using various protein binding and interface methods for Geminiviridae, a second largest virus family. Using this approach, transcriptional activator protein (TrAP/C2) encoded by Cotton leaf curl Kokhran virus (CLCuKoV) and Cotton leaf curl Multan virus (CLCuMV) showed strong binding affinity with calmodulin-like (CML) protein of Gossypium hirsutum (Gh-CML11). Higher negative value for the change in Gibbs free energy between TrAP and Gh-CML11 indicated strong binding affinity. Consensus from gene ontology database and in-silico nuclear localization signal (NLS) tools identified subcellular localization of TrAP in the nucleus associated with Gh-CML11 for virus infection. Data based on interaction prediction and docking methods present evidences that full length and truncated C2 strongly binds with Gh-CML11. This computational data was further validated with molecular results collected from yeast two-hybrid, bimolecular fluorescence complementation system and pull down assay. In this work, we also show the outcomes of full length and truncated TrAP on plant machinery. This is a first extensive report to delineate a role of CML protein from cotton with begomoviruses encoded transcription activator protein.
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Affiliation(s)
- Hira Kamal
- Department of Plant Pathology, Washington State University, Pullman, WA, USA
| | - Muhammad Mubashar Zafar
- Sanya Institute of Breeding and Multiplication/School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Aqsa Parvaiz
- Department of Biochemistry and Biotechnology, The Women University Multan, Multan. Pakistan
| | - Abdul Razzaq
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan..
| | - Khalid M Elhindi
- Plant Production Department, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Sezai Ercisli
- Department of Horticulture, Faculty of Agriculture, Ataturk University, 25240 Erzurum, Turkey
| | - Fei Qiao
- Sanya Institute of Breeding and Multiplication/School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Xuefei Jiang
- Sanya Institute of Breeding and Multiplication/School of Tropical Agriculture and Forestry, Hainan University, Sanya, China..
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7
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Chaowongdee S, Vannatim N, Malichan S, Kuncharoen N, Tongyoo P, Siriwan W. Comparative transcriptomics analysis reveals defense mechanisms of Manihot esculenta Crantz against Sri Lanka Cassava MosaicVirus. BMC Genomics 2024; 25:436. [PMID: 38698332 PMCID: PMC11067156 DOI: 10.1186/s12864-024-10315-0] [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: 12/22/2023] [Accepted: 04/16/2024] [Indexed: 05/05/2024] Open
Abstract
BACKGROUND Cassava mosaic disease (CMD), caused by Sri Lankan cassava mosaic virus (SLCMV) infection, has been identified as a major pernicious disease in Manihot esculenta Crantz (cassava) plantations. It is widespread in Southeast Asia, especially in Thailand, which is one of the main cassava supplier countries. With the aim of restricting the spread of SLCMV, we explored the gene expression of a tolerant cassava cultivar vs. a susceptible cassava cultivar from the perspective of transcriptional regulation and the mechanisms underlying plant immunity and adaptation. RESULTS Transcriptomic analysis of SLCMV-infected tolerant (Kasetsart 50 [KU 50]) and susceptible (Rayong 11 [R 11]) cultivars at three infection stages-that is, at 21 days post-inoculation (dpi) (early/asymptomatic), 32 dpi (middle/recovery), and 67 dpi (late infection/late recovery)-identified 55,699 expressed genes. Differentially expressed genes (DEGs) between SLCMV-infected KU 50 and R 11 cultivars at (i) 21 dpi to 32 dpi (the early to middle stage), and (ii) 32 dpi to 67 dpi (the middle stage to late stage) were then identified and validated by real-time quantitative PCR (RT-qPCR). DEGs among different infection stages represent genes that respond to and regulate the viral infection during specific stages. The transcriptomic comparison between the tolerant and susceptible cultivars highlighted the role of gene expression regulation in tolerant and susceptible phenotypes. CONCLUSIONS This study identified genes involved in epigenetic modification, transcription and transcription factor activities, plant defense and oxidative stress response, gene expression, hormone- and metabolite-related pathways, and translation and translational initiation activities, particularly in KU 50 which represented the tolerant cultivar in this study.
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Affiliation(s)
- Somruthai Chaowongdee
- Center of Excellence on Agricultural Biotechnology (AG-BIO/MHESI), Bangkok, 10900, Thailand
- Center for Agricultural Biotechnology, Kasetsart University, Kamphaengsaen Campus, Nakhon Pathom, 73140, Thailand
| | - Nattachai Vannatim
- Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand
| | - Srihunsa Malichan
- Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand
| | - Nattakorn Kuncharoen
- Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand
| | - Pumipat Tongyoo
- Center of Excellence on Agricultural Biotechnology (AG-BIO/MHESI), Bangkok, 10900, Thailand
- Center for Agricultural Biotechnology, Kasetsart University, Kamphaengsaen Campus, Nakhon Pathom, 73140, Thailand
| | - Wanwisa Siriwan
- Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand.
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de Macedo MA, Gilbertson RL, Rojas MR, Filho AB, Pereira JL, Costa TM, Inoue-Nagata AK. A Tomato-Free Period Delays and Reduces Begomovirus Disease in Processing Tomato Fields in a Complex Agroecosystem in Central Brazil. PLANT DISEASE 2024; 108:887-898. [PMID: 37775922 DOI: 10.1094/pdis-06-23-1154-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/01/2023]
Abstract
A mandatory tomato-free period (TFP) was implemented in the state of Goiás, Brazil, in 2007 to help manage diseases caused by whitefly-transmitted begomoviruses. The impact of the TFP was examined in five locations across three states in Central Brazil from 2013 to 2016. Surveys revealed significant differences in begomovirus disease incidence among locations, i.e., low in Guaíra-TFP and Patos de Minas-TFP; moderate-high in Itaberaí-TFP and Morrinhos-TFP; and high in the non-TFP (NTFP) control, Cristalina-NTFP. PCR tests and DNA sequencing were used to validate the symptoms and showed that all collected symptomatic plant samples were infected with tomato severe rugose virus (ToSRV), a common indigenous bipartite begomovirus. Early season surveys (20 to 40 days after transplants [DAT]) in Itaberaí-TFP and Morrinhos-TFP revealed significantly less begomovirus disease in fields established sooner after the TFP (0 to 2 months) compared with incidences in (i) equivalent early planted fields in the Cristalina-NTFP control and (ii) fields established longer after the end of the TFP (>2 to 5 months). Whitefly infestation of crops was detected year-round in all locations and years, and all tested adults were classified in the Bemisia tabaci MEAM1 cryptic species. Infestation levels were significantly higher during the summer but did not vary significantly among locations. Results of monthly monitoring of adult whiteflies for general begomovirus and ToSRV were positively correlated and were indicators of disease incidence in the field. Notably, ToSRV was not detected in whiteflies collected from nontomato plants during the TFP, and there was a longer lag period before detection in whiteflies collected from processing tomatoes for Itaberaí-TFP and Morrinhos-TFP compared with Cristalina-NTFP. Taken together with the low levels of ToSRV infection detected in potential nontomato reservoir hosts at all locations, our results revealed low levels of primary inoculum during the TFP. Thus, even in a complex agroecosystem with year-round whitefly infestation of crops, the TFP was beneficial due to delayed and reduced begomovirus disease pressure during a critical stage of plant development (first month) and for favoring low levels of primary inoculum. Thus, we concluded that the TFP should be part of a regional integrated pest management (IPM) program targeting ToSRV in Brazil.
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Affiliation(s)
- Mônica Alves de Macedo
- Department of Plant Pathology, University of Brasilia, Brasília, Brazil
- Department of Plant Pathology, University of California Davis, Davis, CA, U.S.A
- Embrapa Vegetables, Federal District, Brazil
| | - Robert L Gilbertson
- Department of Plant Pathology, University of California Davis, Davis, CA, U.S.A
| | - Maria R Rojas
- Department of Plant Pathology, University of California Davis, Davis, CA, U.S.A
| | - Armando Bergamin Filho
- Department of Plant Pathology, Escola Superior de Agronomia Luiz de Queiroz, Piracicaba, SP, Brazil
| | | | | | - Alice Kazuko Inoue-Nagata
- Department of Plant Pathology, University of Brasilia, Brasília, Brazil
- Embrapa Vegetables, Federal District, Brazil
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9
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Srivastava A, Pandey V, Singh N, Marwal A, Shahid MS, Gaur RK. In silico identification of papaya genome-encoded microRNAs to target begomovirus genes in papaya leaf curl disease. Front Microbiol 2024; 15:1340275. [PMID: 38605706 PMCID: PMC11008722 DOI: 10.3389/fmicb.2024.1340275] [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: 11/17/2023] [Accepted: 02/26/2024] [Indexed: 04/13/2024] Open
Abstract
Papaya leaf curl disease (PaLCuD) is widespread and classified in the genus begomovirus (Geminiviridae), disseminated by the vector whitefly Bemisia tabaci. RNA interference (RNAi)-based antiviral innate immunity stands as a pivotal defense mechanism and biological process in limiting viral genomes to manage plant diseases. The current study aims to identify and analyze Carica Papaya locus-derived capa-microRNAs with predicted potential for targeting divergent begomovirus species-encoded mRNAs using a 'four integrative in silico algorithms' approach. This research aims to experimentally activate the RNAi catalytic pathway using in silico-predicted endogenous capa-miRNAs and create papaya varieties capable of assessing potential resistance against begomovirus species and monitoring antiviral capabilities. This study identified 48 predicted papaya locus-derived candidates from 23 miRNA families, which were further investigated for targeting begomovirus genes. Premised all the four algorithms combined, capa-miR5021 was the most anticipated miRNA followed by capa-miR482, capa-miR5658, capa-miR530b, capa-miR3441.2, and capa-miR414 'effective' papaya locus-derived candidate capa-miRNA and respected putative binding sites for targets at the consensus nucleotide position. It was predicted to bind and target mostly to AC1 gene of the complementary strand and the AV1 gene of the virion strand of different begomovirus isolates, which were associated with replication-associated protein and encapsidation, respectively, during PaLCuD. These miRNAs were also found targeting betaC1 gene of betasatellite which were associated with retardation in leaf growth and developmental abnormalities with severe symptoms during begomovirus infection. To validate target prediction accuracy, we created an integrated Circos plot for comprehensive visualization of host-virus interaction. In silico-predicted papaya genome-wide miRNA-mediated begomovirus target gene regulatory network corroborated interactions that permit in vivo analysis, which could provide biological material and valuable evidence, leading to the development of begomovirus-resistant papaya plants. The integrative nature of our research positions it at the forefront of efforts to ensure the sustainable cultivation of papaya, particularly in the face of evolving pathogenic threats. As we move forward, the knowledge gained from this study provides a solid foundation for continued exploration and innovation in the field of papaya virology, and to the best of our knowledge, this study represents a groundbreaking endeavor, undertaken for the first time in the context of PaLCuD research.
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Affiliation(s)
- Aarshi Srivastava
- Department of Biotechnology, Deen Dayal Updhyaya Gorakhpur University, Gorakhpur, India
| | - Vineeta Pandey
- Department of Biotechnology, Deen Dayal Updhyaya Gorakhpur University, Gorakhpur, India
| | - Nupur Singh
- Institute of Agriculture and Natural Sciences, Department of Biotechnology, Deen Dayal Updhyaya Gorakhpur University, Gorakhpur, India
| | - Avinash Marwal
- Department of Biotechnology, Mohanlal Sukhadia University, Udaipur, India
| | - Muhammad Shafiq Shahid
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Oman
| | - R. K. Gaur
- Department of Biotechnology, Deen Dayal Updhyaya Gorakhpur University, Gorakhpur, India
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10
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Nadeem S, Riaz Ahmed S, Luqman T, Tan DKY, Maryum Z, Akhtar KP, Muhy Ud Din Khan S, Tariq MS, Muhammad N, Khan MKR, Liu Y. A comprehensive review on Gossypium hirsutum resistance against cotton leaf curl virus. Front Genet 2024; 15:1306469. [PMID: 38440193 PMCID: PMC10909863 DOI: 10.3389/fgene.2024.1306469] [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: 10/03/2023] [Accepted: 02/01/2024] [Indexed: 03/06/2024] Open
Abstract
Cotton (Gossypium hirsutum L.) is a significant fiber crop. Being a major contributor to the textile industry requires continuous care and attention. Cotton is subjected to various biotic and abiotic constraints. Among these, biotic factors including cotton leaf curl virus (CLCuV) are dominant. CLCuV is a notorious disease of cotton and is acquired, carried, and transmitted by the whitefly (Bemisia tabaci). A cotton plant affected with CLCuV may show a wide range of symptoms such as yellowing of leaves, thickening of veins, upward or downward curling, formation of enations, and stunted growth. Though there are many efforts to protect the crop from CLCuV, long-term results are not yet obtained as CLCuV strains are capable of mutating and overcoming plant resistance. However, systemic-induced resistance using a gene-based approach remained effective until new virulent strains of CLCuV (like Cotton Leaf Curl Burewala Virus and others) came into existence. Disease control by biological means and the development of CLCuV-resistant cotton varieties are in progress. In this review, we first discussed in detail the evolution of cotton and CLCuV strains, the transmission mechanism of CLCuV, the genetic architecture of CLCuV vectors, and the use of pathogen and nonpathogen-based approaches to control CLCuD. Next, we delineate the uses of cutting-edge technologies like genome editing (with a special focus on CRISPR-Cas), next-generation technologies, and their application in cotton genomics and speed breeding to develop CLCuD resistant cotton germplasm in a short time. Finally, we delve into the current obstacles related to cotton genome editing and explore forthcoming pathways for enhancing precision in genome editing through the utilization of advanced genome editing technologies. These endeavors aim to enhance cotton's resilience against CLCuD.
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Affiliation(s)
- Sahar Nadeem
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
| | - Syed Riaz Ahmed
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
- Pakistan Agriculture Research Council (PARC), Horticulture Research Institute Khuzdar Baghbana, Khuzdar, Pakistan
| | - Tahira Luqman
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
| | - Daniel K. Y. Tan
- School of Life and Environmental Sciences, Plant Breeding Institute, Sydney Institute of Agriculture, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - Zahra Maryum
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
| | - Khalid Pervaiz Akhtar
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
| | - Sana Muhy Ud Din Khan
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
| | - Muhammad Sayyam Tariq
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
| | - Nazar Muhammad
- Agriculture and Cooperative Department, Quetta, Pakistan
| | - Muhammad Kashif Riaz Khan
- Nuclear Institute for Agriculture and Biology College, Pakistan Institute of Engineering and Applied Sciences (NIAB-C, PIEAS), Faisalabad, Pakistan
- Plant Breeding and Genetics Division, Cotton Group, Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan
| | - Yongming Liu
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya, China
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Tian Y, Fang Y, Zhang K, Zhai Z, Yang Y, He M, Cao X. Applications of Virus-Induced Gene Silencing in Cotton. PLANTS (BASEL, SWITZERLAND) 2024; 13:272. [PMID: 38256825 PMCID: PMC10819639 DOI: 10.3390/plants13020272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/02/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024]
Abstract
Virus-induced gene silencing (VIGS) is an RNA-mediated reverse genetics technique that has become an effective tool to investigate gene function in plants. Cotton is one of the most important economic crops globally. In the past decade, VIGS has been successfully applied in cotton functional genomic studies, including those examining abiotic and biotic stress responses and vegetative and reproductive development. This article summarizes the traditional vectors used in the cotton VIGS system, the visible markers used for endogenous gene silencing, the applications of VIGS in cotton functional genomics, and the limitations of VIGS and how they can be addressed in cotton.
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Affiliation(s)
- Yue Tian
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
| | - Yao Fang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
| | - Kaixin Zhang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
| | - Zeyang Zhai
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
| | - Yujie Yang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
| | - Meiyu He
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
| | - Xu Cao
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212003, China; (Y.T.); (Y.F.); (K.Z.); (Z.Z.); (Y.Y.); (M.H.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agricultural and Rural Areas, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
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12
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da Silva JPH, Zerbini FM. Taxonomic Classification of Geminiviruses Based on Pairwise Sequence Comparisons. Methods Mol Biol 2024; 2724:21-31. [PMID: 37987895 DOI: 10.1007/978-1-0716-3485-1_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Geminiviridae is the largest and one of the most diverse families of plant viruses, comprising 14 genera demarcated based on host range, type of insect vector, and phylogenetic relationships. The use of unbiased, whole-genome multiple displacement amplification techniques coupled with high-throughput sequencing has greatly expanded our knowledge of geminivirus diversity over the last two decades. As a result, a large number of new species have been described in recent years. Species demarcation criteria in the family are entirely based on sequence comparisons, but the specific cutoff values vary for each genus. The purpose of this chapter is to provide a step-by-step pipeline to classify new species in the family Geminiviridae.
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Affiliation(s)
| | - F Murilo Zerbini
- Dep. de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
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13
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Devika PP, Alex S, Soni KB, Sindura KP, Ayisha R, Manju RV. Nano-PCR for the early detection of tomato leaf curl virus. 3 Biotech 2024; 14:5. [PMID: 38074290 PMCID: PMC10700262 DOI: 10.1007/s13205-023-03842-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 11/02/2023] [Indexed: 01/19/2024] Open
Abstract
Nano-PCR is a potential tool for the early detection of plant viruses. In the current study, different concentrations of silver nanoparticles (20 nm) and magnesium oxide nanoparticles (50 nm) were included in the PCR mixture to improve the sensitivity of PCR for the detection of tomato leaf curl virus. The inclusion of nanoparticles in single or combination in PCR mixture has resulted in improvement of PCR sensitivity. Four-fold improvement was exhibited by the inclusion of 3 ng/µL silver nanoparticles, whereas the combination of silver and magnesium oxide nanoparticles (3 ng/µL and 200 ng/µL, respectively), resulted in a 4.5-fold improvement. The inclusion of 200 ng/µL of magnesium oxide nanoparticles in the PCR mixture exhibited a 7.6-fold increase in PCR sensitivity. Replacement of magnesium chloride with a combination of silver and magnesium oxide nanoparticles (3 ng/µL and 275 ng/µL, respectively) resulted in a 12-fold increase. A 13-fold improvement in PCR sensitivity was observed by the replacement of magnesium chloride in PCR buffer with 275 ng/µL of magnesium oxide nanoparticles. This could also produce detectable amplicon in PCR with a minimum of 25 cycles, resulting in a 26.5% reduction in the duration of PCR. This is the first report on the use of magnesium oxide nanoparticles in PCR for the early detection and better management of tomato leaf curl virus. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03842-2.
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Affiliation(s)
- P. P. Devika
- Department of Molecular Biology and Biotechnology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - Swapna Alex
- Department of Molecular Biology and Biotechnology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - K. B. Soni
- Department of Molecular Biology and Biotechnology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - K. P. Sindura
- Department of Molecular Biology and Biotechnology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - R. Ayisha
- Department of Plant Pathology, College of Agriculture, Vellanikkara, Kerala Agricultural University, Thrissur, Kerala 680656 India
| | - R. V. Manju
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
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Shafiq M, Ondrasek G, Al-Sadi AM, Shahid MS. Molecular Signature of a Novel Alternanthera Yellow Vein Virus Variant Infecting the Ageratum conyzoides Weed in Oman. Viruses 2023; 15:2381. [PMID: 38140622 PMCID: PMC10747960 DOI: 10.3390/v15122381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
Alternanthera yellow vein virus (AlYVV), a monopartite begomovirus, has been identified infecting a diverse range of crops and native plants in Pakistan, India, and China. However, distinctive yellow vein symptoms, characteristic of begomovirus infection, were observed on the Ageratum conyzoides weed in Oman, prompting a thorough genomic characterization in this study. The results unveiled a complete genome sequence of 2745 base pairs and an associated betasatellite spanning 1345 base pairs. In addition, Sequence Demarcation Tool analyses indicated the highest nucleotide identity of 92.8% with a previously reported AlYVV-[IN_abalpur_A_17:LC316182] strain, whereas the betasatellite exhibited a 99.8% nucleotide identity with isolates of tomato leaf curl betasatellite. Thus, our findings propose a novel AlYVV Oman virus (AlYVV-OM) variant, emphasizing the need for additional epidemiological surveillance to understand its prevalence and significance in Oman and the broader region. To effectively manage the spread of AlYVV-OM and minimize its potential harm to (agro)ecosystems, future research should focus on elucidating the genetic diversity of AlYVV-OM and its interactions with other begomoviruses.
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Affiliation(s)
- Muhammad Shafiq
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud, Muscat 123, Oman
| | - Gabrijel Ondrasek
- Faculty of Agriculture, University of Zagreb, Svetosimunska Cesta 25, 10000 Zagreb, Croatia
| | - Abdullah Mohammed Al-Sadi
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud, Muscat 123, Oman
| | - Muhammad Shafiq Shahid
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud, Muscat 123, Oman
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15
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Kumar M, Ghosh A, Jadon KS, Kaur B, Kakani RK, Solanki RK. Association of a novel begomovirus species with fenugreek yellow vein disease in India. Mol Biol Rep 2023; 50:9203-9211. [PMID: 37776416 DOI: 10.1007/s11033-023-08806-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 09/07/2023] [Indexed: 10/02/2023]
Abstract
BACKGROUND Fenugreek (Trigonella foenum-graecum L.) is an annual medicinal and spice crop belonging to the family Fabaceae. The occurrence of a yellow vein disease was recorded in fenugreek in Jodhpur (India) in 2022. The infection of begomoviruses in legume crops results in significant yield loss and major economic loss. The current study reports an association of a novel begomovirus species associated with yellow vein disease in Fenugreek. METHODS AND RESULTS In symptomatic fenugreek plants, geminivirus-like particles were visible under a transmission electron microscope. Further, nucleotide sequence analysis of the rolling circle amplified product revealed 2743 nucleotide DNA-A genome with close relatedness to French bean leaf curl virus (88.21%) and Senna leaf curl virus (87.63%). It was proposed as a new begomovirus species, Fenugreek yellow vein Rajasthan virus. The genome organization suggested the presence of a typical nonanucleotide sequence along with 7 ORFs in DNA-A. A possible recombination event took place in the coat protein (V1) region with Pedilanthus leaf curl virus and Chilli leaf curl virus as major and minor parents. The recombinant virus poses possible threats to several other legume crops. To the best of our knowledge, this is the first report of the association of FeYVRaV with fenugreek yellow vein disease from northwestern India. CONCLUSIONS In conclusion, the presence of a novel begomovirus species associated with yellow vein disease in fenugreek is alarming and needs further studies on its infectivity to prevent its spread to legume crops.
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Affiliation(s)
- Manish Kumar
- Insect Vector Laboratory, Advanced Centre for Plant Virology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Tifton, GA, 31793, USA
| | - Amalendu Ghosh
- Insect Vector Laboratory, Advanced Centre for Plant Virology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India.
| | - Kuldeep Singh Jadon
- ICAR-Central Arid Zone Research Institute, Jodhpur, Rajasthan, 342003, India.
| | - Baljeet Kaur
- Division of Plant Pathology, TEM Facility, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Rajesh K Kakani
- ICAR-Central Arid Zone Research Institute, Jodhpur, Rajasthan, 342003, India
| | - Ramesh K Solanki
- ICAR-Central Arid Zone Research Institute, Jodhpur, Rajasthan, 342003, India
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Nalla MK, Schafleitner R, Pappu HR, Barchenger DW. Current status, breeding strategies and future prospects for managing chilli leaf curl virus disease and associated begomoviruses in Chilli ( Capsicum spp.). FRONTIERS IN PLANT SCIENCE 2023; 14:1223982. [PMID: 37936944 PMCID: PMC10626458 DOI: 10.3389/fpls.2023.1223982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 10/09/2023] [Indexed: 11/09/2023]
Abstract
Chilli leaf curl virus disease caused by begomoviruses, has emerged as a major threat to global chilli production, causing severe yield losses and economic harm. Begomoviruses are a highly successful and emerging group of plant viruses that are primarily transmitted by whiteflies belonging to the Bemisia tabaci complex. The most effective method for mitigating chilli leaf curl virus disease losses is breeding for host resistance to Begomovirus. This review highlights the current situation of chilli leaf curl virus disease and associated begomoviruses in chilli production, stressing the significant issues that breeders and growers confront. In addition, the various breeding methods used to generate begomovirus resistant chilli cultivars, and also the complicated connections between the host plant, vector and the virus are discussed. This review highlights the importance of resistance breeding, emphasising the importance of multidisciplinary approaches that combine the best of traditional breeding with cutting-edge genomic technologies. subsequently, the article highlights the challenges that must be overcome in order to effectively deploy begomovirus resistant chilli varieties across diverse agroecological zones and farming systems, as well as understanding the pathogen thus providing the opportunities for improving the sustainability and profitability of chilli production.
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Affiliation(s)
- Manoj Kumar Nalla
- World Vegetable Center, South and Central Asia Regional Office, Hyderabad, India
| | | | - Hanu R. Pappu
- Department of Plant Pathology, Washington State University, Pullman, WA, United States
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Pfrieme AK, Will T, Pillen K, Stahl A. The Past, Present, and Future of Wheat Dwarf Virus Management-A Review. PLANTS (BASEL, SWITZERLAND) 2023; 12:3633. [PMID: 37896096 PMCID: PMC10609771 DOI: 10.3390/plants12203633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/29/2023] [Accepted: 10/04/2023] [Indexed: 10/29/2023]
Abstract
Wheat dwarf disease (WDD) is an important disease of monocotyledonous species, including economically important cereals. The causative pathogen, wheat dwarf virus (WDV), is persistently transmitted mainly by the leafhopper Psammotettix alienus and can lead to high yield losses. Due to climate change, the periods of vector activity increased, and the vectors have spread to new habitats, leading to an increased importance of WDV in large parts of Europe. In the light of integrated pest management, cultivation practices and the use of resistant/tolerant host plants are currently the only effective methods to control WDV. However, knowledge of the pathosystem and epidemiology of WDD is limited, and the few known sources of genetic tolerance indicate that further research is needed. Considering the economic importance of WDD and its likely increasing relevance in the coming decades, this study provides a comprehensive compilation of knowledge on the most important aspects with information on the causal virus, its vector, symptoms, host range, and control strategies. In addition, the current status of genetic and breeding efforts to control and manage this disease in wheat will be discussed, as this is crucial to effectively manage the disease under changing environmental conditions and minimize impending yield losses.
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Affiliation(s)
- Anne-Kathrin Pfrieme
- Institute for Resistance Research and Stress Tolerance, Julius Kühn Institute (JKI)—Federal Research Centre for Cultivated Plants, 06484 Quedlinburg, Germany; (T.W.); (A.S.)
| | - Torsten Will
- Institute for Resistance Research and Stress Tolerance, Julius Kühn Institute (JKI)—Federal Research Centre for Cultivated Plants, 06484 Quedlinburg, Germany; (T.W.); (A.S.)
| | - Klaus Pillen
- Institute of Agricultural and Nutritional Science, Plant Breeding, Martin-Luther-University Halle-Wittenberg, 06108 Halle (Saale), Germany;
| | - Andreas Stahl
- Institute for Resistance Research and Stress Tolerance, Julius Kühn Institute (JKI)—Federal Research Centre for Cultivated Plants, 06484 Quedlinburg, Germany; (T.W.); (A.S.)
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Dokka N, Marathe A, Sahu B, Kaushal P, Ghosh PK, Sivalingam PN. Cajanus Scarabaeoides Yellow Mosaic Virus, a New Bipartite Begomovirus Causing Yellow Mosaic Disease in Cajanus scarabaeoides in India. PLANT DISEASE 2023; 107:2924-2928. [PMID: 36890129 DOI: 10.1094/pdis-06-22-1473-sc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Yellow mosaic disease of Cajanus scarabaeoides (L.) Thouars (CsYMD) was observed in up to 46% of C. scarabaeoides plants in the mungbean, urdbean, and pigeon pea fields from 22 districts of Chhattisgarh State, India, during 2017 to 2019. The symptoms were characterized by yellow mosaic on green leaves and yellow discoloration of leaves in advanced stages of the disease. Severely infected plants showed shortened internodal length and reduced leaf size. CsYMD was transmissible to healthy C. scarabaeoides and C. cajan by whitefly (Bemisia tabaci). The infected plants developed typical yellow mosaic symptoms on their leaves within 16 and 22 days of inoculation, respectively, suggesting a begomovirus etiology. Molecular analysis revealed that this begomovirus has a bipartite genome composed of DNA-A (2,729 nucleotides) and DNA-B (2,630 nucleotides). Sequence and phylogenetic analyses revealed that the nucleotide sequence of the DNA-A component had the highest identity of 81.1% with DNA-A of Rhynchosia yellow mosaic virus (RhYMV; NC_038885), followed by mungbean yellow mosaic virus (MN602427; 75.3%). DNA-B had the highest identity of 74.0% with DNA-B of RhYMV (NC_038886). As per ICTV guidelines, this isolate had <91% nucleotide identity with DNA-A of any of the begomoviruses reported; so, it is proposed as a new begomovirus species, tentatively named C. scarabaeoides yellow mosaic virus (CsYMV). After agroinoculation with DNA-A and DNA-B clones of CsYMV, all Nicotiana benthamiana plants developed leaf curl symptoms along with light yellowing symptoms 8 to 10 days after inoculation (DAI), while ∼60% of the C. scarabaeoides plants developed yellow mosaic symptoms similar to those observed in the field 18 DAI, thus fulfilling Koch's postulates. From these agro-infected C. scarabaeoides plants, CsYMV was transmissible to healthy C. scarabaeoides plants by B. tabaci. Apart from these hosts, CsYMV also infected and caused symptoms in mungbean and pigeon pea.
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Affiliation(s)
- Narasimham Dokka
- Indian Council of Agricultural Research-National Institute of Biotic Stress Management, Raipur, Chhattisgarh, India
| | - Ashish Marathe
- Indian Council of Agricultural Research-National Institute of Biotic Stress Management, Raipur, Chhattisgarh, India
| | - Bhimeshwari Sahu
- Indian Council of Agricultural Research-National Institute of Biotic Stress Management, Raipur, Chhattisgarh, India
| | - Pankaj Kaushal
- Indian Council of Agricultural Research-National Institute of Biotic Stress Management, Raipur, Chhattisgarh, India
| | - Probir Kumar Ghosh
- Indian Council of Agricultural Research-National Institute of Biotic Stress Management, Raipur, Chhattisgarh, India
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Mo C, Tang Y, Chen J, Cui L, Xie H, Qin B, Cai J, Li Z. Characteristics of the Complete Genome of Ageratum Yellow Vein China Virus Infecting Sonchus oleraceus. PLANT DISEASE 2023; 107:2944-2948. [PMID: 37125842 DOI: 10.1094/pdis-11-22-2688-sc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Sonchus (Sonchus oleraceus) originated from Europe and is now cultivated worldwide. The wild resources of sonchus are very abundant, and it has rich nutritional and medicinal value. In this study, 15 sonchus samples with typical symptoms showing leaf curling, vein thickening, and enations were collected from Guigang and Baise City of Guangxi, China. Diseased sonchus were identified by PCR detection, whole genome sequence amplification, and phylogenetic and recombination analysis. The results showed that all the samples were confirmed infected by begomoviruses, and three full-length viral genomes were obtained from 15 sonchus, named GG7-13, GG8-6, and BS63-5. The full genome lengths were 2,584, 2,735, and 2,746 nt, respectively. The nucleotide identities among the three isolates ranged from 92.67 to 99.93%. All of them shared the highest identities (greater than 91.69%) with other isolates of ageratum yellow vein China virus (AYVCNV) (available on GenBank). According to the guidelines of classification of begomoviruses, the virus isolates obtained in this study are different isolates of AYVCNV; a phylogenetic tree analysis showed that these isolates formed a large branch with three other Guangxi isolates of AYVCNV, indicating their close evolution. The genome structures of GG8-6 and BS63-5 are consistent with the monopartite genome virus of the begomoviruses, and both have six open reading frames (ORFs), while GG7-13 has a 151-nt deletion between C2 and C3, resulting in a mutant strain of only five ORFs. This study is the first report on S. oleraceus infected by ageratum yellow vein China virus.
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Affiliation(s)
- Cuiping Mo
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
| | - Yafei Tang
- Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, Guangdong 510640, China
| | - Jinqing Chen
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
| | - Lixian Cui
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
| | - Huiting Xie
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
| | - Bixia Qin
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
| | - Jianhe Cai
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
| | - Zhanbiao Li
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences; Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs; Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi 530007, China
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Ebrahimi S, Eini O, Baßler A, Hanke A, Yildirim Z, Wassenegger M, Krczal G, Uslu VV. Beet Curly Top Iran Virus Rep and V2 Suppress Post-Transcriptional Gene Silencing via Distinct Modes of Action. Viruses 2023; 15:1996. [PMID: 37896771 PMCID: PMC10611197 DOI: 10.3390/v15101996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/21/2023] [Accepted: 09/23/2023] [Indexed: 10/29/2023] Open
Abstract
Beet curly top Iran virus (BCTIV) is a yield-limiting geminivirus belonging to the becurtovirus genus. The genome organization of BCTIV is unique such that the complementary strand of BCTIV resembles Mastrevirus, whereas the virion strand organization is similar to the Curtovirus genus. Geminiviruses are known to avoid the plant defense system by suppressing the RNA interference mechanisms both at the transcriptional gene silencing (TGS) and post-transcriptional gene silencing (PTGS) levels. Multiple geminivirus genes have been identified as viral suppressors of RNA silencing (VSR) but VSR activity remains mostly elusive in becurtoviruses. We found that BCTIV-V2 and -Rep could suppress specific Sense-PTGS mechanisms with distinct efficiencies depending on the nature of the silencing inducer and the target gene. Local silencing induced by GFP inverted repeat (IR) could not be suppressed by V2 but was partially reduced by Rep. Accordingly, we documented that Rep but not V2 could suppress systemic silencing induced by GFP-IR. In addition, we showed that the VSR activity of Rep was partly regulated by RNA-dependent RNA Polymerase 6 (RDR6), whereas the VSR activity of V2 was independent of RDR6. Domain mapping for Rep showed that an intact Rep protein was required for the suppression of PTGS. In summary, we showed that BCTIV-Rep and -V2 function as silencing suppressors with distinct modes of action.
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Affiliation(s)
- Saeideh Ebrahimi
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
- Department of Plant Protection, University of Zanjan, Zanjan 313, Iran
| | - Omid Eini
- Department of Plant Protection, University of Zanjan, Zanjan 313, Iran
- Department of Phytopathology, Institute for Sugar Beet Research, 37079 Göttingen, Germany
| | - Alexandra Baßler
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
| | - Arvid Hanke
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
- MAPS, COS, Heidelberg University, 69120 Heidelberg, Germany
| | - Zeynep Yildirim
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
| | - Michael Wassenegger
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
| | - Gabi Krczal
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
| | - Veli Vural Uslu
- RLP AgroScience GmbH, Breitenweg 71, 67435 Neustadt an der Weinstraße, Germany
- MAPS, COS, Heidelberg University, 69120 Heidelberg, Germany
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21
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Shakir S, Mubin M, Nahid N, Serfraz S, Qureshi MA, Lee TK, Liaqat I, Lee S, Nawaz-ul-Rehman MS. REPercussions: how geminiviruses recruit host factors for replication. Front Microbiol 2023; 14:1224221. [PMID: 37799604 PMCID: PMC10548238 DOI: 10.3389/fmicb.2023.1224221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/21/2023] [Indexed: 10/07/2023] Open
Abstract
Circular single-stranded DNA viruses of the family Geminiviridae encode replication-associated protein (Rep), which is a multifunctional protein involved in virus DNA replication, transcription of virus genes, and suppression of host defense responses. Geminivirus genomes are replicated through the interaction between virus Rep and several host proteins. The Rep also interacts with itself and the virus replication enhancer protein (REn), which is another essential component of the geminivirus replicase complex that interacts with host DNA polymerases α and δ. Recent studies revealed the structural and functional complexities of geminivirus Rep, which is believed to have evolved from plasmids containing a signature domain (HUH) for single-stranded DNA binding with nuclease activity. The Rep coding sequence encompasses the entire coding sequence for AC4, which is intricately embedded within it, and performs several overlapping functions like Rep, supporting virus infection. This review investigated the structural and functional diversity of the geminivirus Rep.
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Affiliation(s)
- Sara Shakir
- Plant Genetics Lab, Gembloux Agro-Bio Tech, University of Liѐge, Gembloux, Belgium
| | - Muhammad Mubin
- Virology Lab, Center for Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Faisalabad, Pakistan
| | - Nazia Nahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Saad Serfraz
- Virology Lab, Center for Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Faisalabad, Pakistan
| | - Muhammad Amir Qureshi
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea
| | - Taek-Kyun Lee
- Risk Assessment Research Center, Korea Institute of Ocean Science and Technology, Geoje, Republic of Korea
| | - Iram Liaqat
- Microbiology Lab, Department of Zoology, Government College University, Lahore, Pakistan
| | - Sukchan Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea
| | - Muhammad Shah Nawaz-ul-Rehman
- Virology Lab, Center for Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Faisalabad, Pakistan
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22
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Lal A, Shamim A, Kil EJ, Vo TTB, Qureshi MA, Bupi N, Tabassum M, Lee S. Insights into the Differential Composition of Stem-Loop Structures of Nanoviruses and Their Impacts. Microbiol Spectr 2023; 11:e0479822. [PMID: 37367433 PMCID: PMC10434203 DOI: 10.1128/spectrum.04798-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 05/03/2023] [Indexed: 06/28/2023] Open
Abstract
Multipartite viruses package their genomic segments independently and mainly infect plants; few of them target animals. Nanoviridae is a family of multipartite single-stranded DNA (ssDNA) plant viruses that individually encapsidate ssDNAs of ~1 kb and transmit them through aphids without replication in aphid vectors, thereby causing important diseases in host plants, mainly leguminous crops. All of these components constitute an open reading frame to perform a specific role in nanovirus infection. All segments contain conserved inverted repeat sequences, potentially forming a stem-loop structure and a conserved nonanucleotide, TAGTATTAC, within a common region. This study investigated the variations in the stem-loop structure of nanovirus segments and their impact using molecular dynamics (MD) simulations and wet lab approaches. Although the accuracy of MD simulations is limited by force field approximations and simulation time scale, explicit solvent MD simulations were successfully used to analyze the important aspects of the stem-loop structure. This study involves the mutants' design, based on the variations in the stem-loop region and construction of infectious clones, followed by their inoculation and expression analysis, based on nanosecond dynamics of the stem-loop structure. The original stem-loop structures showed more conformational stability than mutant stem-loop structures. The mutant structures were expected to alter the neck region of the stem-loop by adding and switching nucleotides. Changes in conformational stability are suggested expression variations of the stem-loop structures found in host plants with nanovirus infection. However, our results can be a starting point for further structural and functional analysis of nanovirus infection. IMPORTANCE Nanoviruses comprise multiple segments, each with a single open reading frame to perform a specific function and an intergenic region with a conserved stem-loop region. The genome expression of a nanovirus has been an intriguing area but is still poorly understood. We attempted to investigate the variations in the stem-loop structure of nanovirus segments and their impact on viral expression. Our results show that the stem-loop composition is essential in controlling the virus segments' expression level.
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Affiliation(s)
- Aamir Lal
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
- Department of Plant Medicals, College of Life Sciences, Andong National University, Andong, South Korea
- Agricultural Science and Technology Research Institute, Andong National University, Andong, South Korea
| | - Amen Shamim
- Department of Computer Science, University of Agriculture, Faisalabad, Pakistan
| | - Eui-Joon Kil
- Department of Plant Medicals, College of Life Sciences, Andong National University, Andong, South Korea
- Agricultural Science and Technology Research Institute, Andong National University, Andong, South Korea
| | - Thuy T. B. Vo
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Muhammad Amir Qureshi
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Nattanong Bupi
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Marjia Tabassum
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Sukchan Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
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23
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Ashraf S, Ahmad A, Khan SH, Jamil A, Sadia B, Brown JK. LbCas12a mediated suppression of Cotton leaf curl Multan virus. FRONTIERS IN PLANT SCIENCE 2023; 14:1233295. [PMID: 37636103 PMCID: PMC10456881 DOI: 10.3389/fpls.2023.1233295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 07/21/2023] [Indexed: 08/29/2023]
Abstract
Begomoviruses are contagious and severely affect commercially important fiber and food crops. Cotton leaf curl Multan virus (CLCuMuV) is one of the most dominant specie of Begomovirus and a major constraint on cotton yield in Pakistan. Currently, the field of plant genome editing is being revolutionized by the CRISPR/Cas system applications such as base editing, prime editing and CRISPR based gene drives. CRISPR/Cas9 system has successfully been used against biotic and abiotic plant stresses with proof-of-concept studies in both model and crop plants. CRISPR/Cas12 and CRISPR/Cas13 have recently been applied in plant sciences for basic and applied research. In this study, we used a novel approach, multiplexed crRNA-based Cas12a toolbox to target the different ORFs of the CLCuMuV genome at multiple sites simultaneously. This method successfully eliminated the symptoms of CLCuMuV in Nicotiana benthamiana and Nicotiana tabacum. Three individual crRNAs were designed from the CLCuMuV genome, targeting the specific sites of four different ORFs (C1, V1 and overlapping region of C2 and C3). The Cas12a-based construct Cas12a-MV was designed through Golden Gate three-way cloning for precise editing of CLCuMuV genome. Cas12a-MV construct was confirmed through whole genome sequencing using the primers Ubi-intron-F1 and M13-R1. Transient assays were performed in 4 weeks old Nicotiana benthamiana plants, through the agroinfiltration method. Sanger sequencing indicated that the Cas12a-MV constructs made a considerable mutations at the target sites of the viral genome. In addition, TIDE analysis of Sanger sequencing results showed the editing efficiency of crRNA1 (21.7%), crRNA2 (24.9%) and crRNA3 (55.6%). Furthermore, the Cas12a-MV construct was stably transformed into Nicotiana tabacum through the leaf disc method to evaluate the potential of transgenic plants against CLCuMuV. For transgene analysis, the DNA of transgenic plants of Nicotiana tabacum was subjected to PCR to amplify Cas12a genes with specific primers. Infectious clones were agro-inoculated in transgenic and non-transgenic plants (control) for the infectivity assay. The transgenic plants containing Cas12a-MV showed rare symptoms and remained healthy compared to control plants with severe symptoms. The transgenic plants containing Cas12a-MV showed a significant reduction in virus accumulation (0.05) as compared to control plants (1.0). The results demonstrated the potential use of the multiplex LbCas12a system to develop virus resistance in model and crop plants against begomoviruses.
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Affiliation(s)
- Sidra Ashraf
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
- Cotton Biotechnology Lab, Center for Advanced Studies in Agriculture and Food Security (CASAFS), University of Agriculture, Faisalabad, Pakistan
| | - Aftab Ahmad
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
- Cotton Biotechnology Lab, Center for Advanced Studies in Agriculture and Food Security (CASAFS), University of Agriculture, Faisalabad, Pakistan
| | - Sultan Habibullah Khan
- Cotton Biotechnology Lab, Center for Advanced Studies in Agriculture and Food Security (CASAFS), University of Agriculture, Faisalabad, Pakistan
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Pakistan
| | - Amer Jamil
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Bushra Sadia
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Pakistan
| | - Judith K. Brown
- School of Plant Sciences, University of Arizona, Tucson, AZ, United States
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24
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Kumar S, Gupta N, Chakraborty S. Geminiviral betasatellites: critical viral ammunition to conquer plant immunity. Arch Virol 2023; 168:196. [PMID: 37386317 DOI: 10.1007/s00705-023-05776-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/30/2023] [Indexed: 07/01/2023]
Abstract
Geminiviruses have mastered plant cell modulation and immune invasion to ensue prolific infection. Encoding a relatively small number of multifunctional proteins, geminiviruses rely on satellites to efficiently re-wire plant immunity, thereby fostering virulence. Among the known satellites, betasatellites have been the most extensively investigated. They contribute significantly to virulence, enhance virus accumulation, and induce disease symptoms. To date, only two betasatellite proteins, βC1, and βV1, have been shown to play a crucial role in virus infection. In this review, we offer an overview of plant responses to betasatellites and counter-defense strategies deployed by betasatellites to overcome those responses.
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Affiliation(s)
- Sunil Kumar
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Neha Gupta
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Supriya Chakraborty
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
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25
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Kennedy GG, Sharpee W, Jacobson AL, Wambugu M, Mware B, Hanley-Bowdoin L. Genome segment ratios change during whitefly transmission of two bipartite cassava mosaic begomoviruses. Sci Rep 2023; 13:10059. [PMID: 37344614 DOI: 10.1038/s41598-023-37278-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 06/19/2023] [Indexed: 06/23/2023] Open
Abstract
Cassava mosaic disease is caused by a complex of whitefly-transmitted begomoviruses, which often occur in co-infections. These viruses have bipartite genomes consisting of DNA-A and DNA-B that are encapsidated into separate virions. Individual viruses exist in plants and whitefly vectors as populations comprising both genome segments, which can occur at different frequencies. Both segments are required for infection, and must be transmitted for virus spread to occur. Cassava plants infected with African cassava mosaic virus (ACMV) and/or East African cassava mosaic Cameroon virus (EACMCV), in which the ratios of DNA-A:DNA-B titers differed between plants, were used to examine how titers of the segments in a plant relate to their respective probabilities of acquisition by whiteflies and to the titers of each segment acquired and subsequently transmitted by whiteflies. The probabilities of acquiring each segment of ACMV did not reflect their relative titers in the source plant but they did for EACMCV. However, for both viruses, DNA-A:DNA-B ratios acquired by whiteflies differed from those in the source plant and the ratios transmitted by the whitefly did not differ from one - the ratio at which the highest probability of transmitting both segments is expected.
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Grants
- OISE-1545553 to L.H-B., G.G.K., and A.L.J. National Science Foundation
- OISE-1545553 to L.H-B., G.G.K., and A.L.J. National Science Foundation
- OISE-1545553 to L.H-B., G.G.K., and A.L.J. National Science Foundation
- OISE-1545553 to L.H-B., G.G.K., and A.L.J. National Science Foundation
- OISE-1545553 to L.H-B., G.G.K., and A.L.J. National Science Foundation
- OISE-1545553 to L.H-B., G.G.K., and A.L.J. National Science Foundation
- Hatch Project NCO2784 U.S. Department of Agriculture
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Affiliation(s)
- George G Kennedy
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, 27695-7630, USA.
| | - William Sharpee
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, 27695-7630, USA
| | - Alana L Jacobson
- Department of Entomology, Auburn University, Auburn, AL, 36849, USA
| | - Mary Wambugu
- International Livestock Research Institute (BecA), Nairobi, Kenya
| | - Benard Mware
- International Livestock Research Institute (BecA), Nairobi, Kenya
| | - Linda Hanley-Bowdoin
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, 27695, USA
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26
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Mulaudzi PE, Koorsen G, Mwaba I, Mahomed NB, Allie F. The identification of the methylation patterns of tomato curly stunt virus in resistant and susceptible tomato lines. FRONTIERS IN PLANT SCIENCE 2023; 14:1135442. [PMID: 37346143 PMCID: PMC10281181 DOI: 10.3389/fpls.2023.1135442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 05/10/2023] [Indexed: 06/23/2023]
Abstract
Tomato curly stunt virus (ToCSV) is a monopartite begomovirus infecting tomatoes in South Africa, with sequence similarity to tomato yellow leaf curl virus (TYLCV). While there are numerous reports on the mechanism of TYLCV resistance in tomato, the underlying mechanisms in the tomato-ToCSV pathosystem is still relatively unknown. The main aim of this study was to investigate and compare the global methylation profile of ToCSV in two near-isogenic tomato lines, one with a tolerant phenotype (T, NIL396) and one with a susceptible phenotype (S, NIL395). Bisulfite conversion and PCR amplification, coupled with a next-generation sequencing approach, were used to elucidate the global pattern of methylation of ToCSV cytosine residues in T and S leave tissue at 35 days post-infection (dpi). The extent of methylation was more pronounced in tolerant plants compared to susceptible plants in all sequence (CG, CHG and CHH) contexts, however, the overall methylation levels were relatively low (<3%). Notably, a significant interaction (p < 0.05) was observed between the viral genomic region and susceptible vs. tolerant status for CG methylated regions where it was observed that the 3'IR CG methylation was significantly (p < 0.05) higher than CG methylation of other genomic regions in tolerant and susceptible plants. Additionally, statistically significant (EdgeR p < 0.05) differentially methylated cytosines were located primarily in the genomic regions V2/V1 and C4/C1 of ToCSV. The relative expression, using RT-qPCR, was also employed in order to quantify the expression of various key methylation-related genes, MET1, CMT2, KYP4/SUVH4, DML2, RDM1, AGO4 and AGO6 in T vs. S plants at 35dpi. The differential expression between T and S was significant for MET1, KYP4/SUVH4 and RDM1 at p<0.05 which further supports more pronounced methylation observed in ToCSV from T plants vs. S plants. While this study provides new insights into the differences in methylation profiles of ToCSV in S vs. T tomato plants, further research is required to link tolerance and susceptibility to ToCSV.
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27
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Bahar T, Qurashi F, Haider MS, Rahat MA, Akbar F, Israr M, Ali A, Ullah Z, Ullah F, El-Sheikh MA, Casini R, Elansary HO. Unveiling Lathyrus aphaca L. as a Newly Identified Host for Begomovirus Infection: A Comprehensive Study. Genes (Basel) 2023; 14:1221. [PMID: 37372401 DOI: 10.3390/genes14061221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/20/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
The Begomovirus genus of the family Geminiviridae comprises the largest group of geminiviruses. Begomoviruses are transmitted by the whitefly complex (Bemisia tabaci) and infect dicotyledonous plants in tropical and subtropical regions. The list of begomoviruses is continuously increasing as a result of improvements in the methods for identification, especially from weed plants, which are considered a source of new viruses and reservoirs of economically important viruses but are often neglected during diversity studies. Lathyrus aphaca L. weed plants (yellow-flowered pea) with varicose veins and discoloration of the leaves were found. Amplified genomic DNA through rolling circular amplification was subjected to PCR analysis for the detection of the viral genome and associated DNA-satellites (alphasatellites and betasatellites). A full-length sequence (2.8 kb) of a monopartite begomovirus clone was determined; however, we could not find any associated DNA satellites. The amplified full-length clone of Rose leaf curl virus (RoLCuV) reserved all the characteristics and features of an Old World (OW) monopartite begomovirus. Furthermore, it is the first time it has been reported from a new weed host, yellow-flowered pea. Rolling circle amplification and polymerase chain reaction analysis of associated DNA satellites, alphasatellite, and betasatellite, were frequently accomplished but unable to amplify from the begomovirus-infected samples, indicating the presence of only monopartite Old World begomovirus. It is observed that RoLCuV has the capability to infect different hosts individually without the assistance of any DNA satellite component. Recombination in viruses is also a source of begomovirus infection in different hosts.
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Affiliation(s)
- Tehmina Bahar
- Department of Plant Pathology, Faculty of Agricultural Sciences, The University of Punjab, Lahore 54590, Pakistan
- Department of Forestry, Range & Wildlife Management, Faculty of Agriculture & Environment, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Fasiha Qurashi
- Department of Plant Pathology, Faculty of Agricultural Sciences, The University of Punjab, Lahore 54590, Pakistan
- Department of Forestry, Range & Wildlife Management, Faculty of Agriculture & Environment, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
- Department of Physiology, Biological Sciences, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Muhammad Saleem Haider
- Department of Plant Pathology, Faculty of Agricultural Sciences, The University of Punjab, Lahore 54590, Pakistan
| | - Murad Ali Rahat
- Centre for Biotechnology and Microbiology, University of Swat, Swat 01923, Pakistan
| | - Fazal Akbar
- Centre for Biotechnology and Microbiology, University of Swat, Swat 01923, Pakistan
| | - Muhammad Israr
- Department of Forensic Sciences, University of Swat, Swat 01923, Pakistan
| | - Ahmad Ali
- Center for Plant Sciences and Biodiversity, University of Swat, Charbagh, Swat 01923, Pakistan
| | - Zahid Ullah
- Center for Plant Sciences and Biodiversity, University of Swat, Charbagh, Swat 01923, Pakistan
| | - Fazal Ullah
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Mohamed A El-Sheikh
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Ryan Casini
- School of Public Health, University of California, 2121 Berkeley Way, Berkeley, CA 94704, USA
| | - Hosam O Elansary
- Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
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28
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Gnanasekaran P, Gupta N, Ponnusamy K, Devendran R, George B, Chakraborty S. Betasatellite-encoded βC1 protein regulates helper virus accumulation by interfering with the ATP hydrolysis activity of geminivirus-encoded replication initiator protein. J Gen Virol 2023; 104. [PMID: 37326617 DOI: 10.1099/jgv.0.001866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023] Open
Abstract
Geminivirus-betasatellite disease complexes are an epidemic threat to the majority of economically important crops across the world. Plant virus satellites including betasatellites are maintained by their associated helper virus. Geminivirus-betasatellites influence viral pathogenesis by substantially increasing or decreasing their helper virus accumulation. In the present study, we attempted to understand the mechanistic details of the geminivirus-betasatellite interaction. Here, we used tomato leaf curl Gujarat virus (ToLCGV) and tomato leaf curl Patna betasatellite (ToLCPaB) as a model system. This study reveals that ToLCGV can efficiently trans-replicate ToLCPaB in Nicotiana benthamiana plants, but ToLCPaB greatly reduced the accumulation of its helper virus DNA. For the first time, we have identified that the ToLCPaB-encoded βC1 protein is able to interact with ToLCGV-encoded replication initiator protein (Rep). In addition, we demonstrate that the C-terminal region of βC1 interacts with the C-terminus of Rep (RepC) protein. Our previous study had established that βC1 proteins encoded by diverse betasatellites possess a novel ATP hydrolysis activity and the conserved lysine/arginine residues at positions 49 and 91 are necessary for this function. Here, we show that mutating lysine at positions 49 to alanine of βC1 (βC1K49A) protein did not affect its ability to interact with RepC protein. Biochemical studies performed with ATP hydrolysis activity-deficient K49A mutated βC1 (βC1K49A) and RepC proteins revealed that Rep-βC1 interaction interferes with the ATP hydrolysis activity of Rep protein. Further, we demonstrate that βC1 protein is able to interact with D227A and D289A mutated RepC proteins but not with D262A, K272A or D286A mutated RepC proteins, suggesting that the βC1-interacting region of Rep protein encompasses its Walker-B and B' motifs. The results of docking studies supported that the βC1-interacting region of Rep protein encompasses its motifs associated with ATP binding and ATP hydrolysis activities. Docking studies also provided evidence that the Rep-βC1 interaction interferes with the ATP binding activity of Rep protein. Together, our findings suggest that βC1 protein regulates helper virus accumulation by interfering with the ATP hydrolysis activity of helper virus Rep protein.
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Affiliation(s)
- Prabu Gnanasekaran
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi-110 067, India
| | - Neha Gupta
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi-110 067, India
| | - Kalaiarasan Ponnusamy
- Biotechnology Division, National Centre for Disease Control, New Delhi-110 054, India
| | - Ragunathan Devendran
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi-110 067, India
| | - Biju George
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi-110 067, India
| | - Supriya Chakraborty
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi-110 067, India
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29
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Ghosh S, Srinivasan R, Ghanim M. A C2H2 zinc finger transcription factor of the whitefly Bemisia tabaci interacts with the capsid proteins of begomoviruses and inhibits virus retention. INSECT MOLECULAR BIOLOGY 2023; 32:240-250. [PMID: 36571165 DOI: 10.1111/imb.12827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 12/19/2022] [Indexed: 05/15/2023]
Abstract
Begomoviruses are a group of ssDNA viruses exclusively transmitted by the whitefly Bemisia tabaci and constrain vegetable production in the old and new worlds. Although multiple molecular determinants governing the transmission of begomoviruses by whiteflies have been unravelled, factors critical for transmission majorly remain unknown. In this study, a whitefly C2H2 zinc finger (ZF) protein, 100% identical to the vascular endothelial ZF-like gene (vezf) protein was confirmed to interact with the CP of both old- and new-world begomoviruses. This was achieved by a yeast two-hybrid (Y2H) system screening of a whitefly cDNA library using capsid protein (CP) of TYLCV as a bait. In silico annotation of vezf protein revealed that it contains a N-terminal ZF-associated domain (ZAD) alongside multiple C2H2 ZF domains on the C-terminal end. ZAD-ZF proteins form the most abundant class of transcription factors within insects. Herein, we validated the interaction of vezf with four diverse begomoviruses and its functional role in begomovirus transmission. Silencing of the vezf gene of B. tabaci led to increased retention of three diverse begomoviruses tested. Vezf is the first insect transcription factor identified to interact with plant viruses and can be crucial to understand the possible mechanisms by which plant viruses modulate transcription of their insect vectors during transmission.
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Affiliation(s)
- Saptarshi Ghosh
- Department of Entomology, Volcani Center, Rishon Lezion, Israel
- Department of Entomology, University of Georgia, Griffin, Georgia, USA
| | | | - Murad Ghanim
- Department of Entomology, Volcani Center, Rishon Lezion, Israel
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Wahyono A, Murti RH, Hartono S, Nuringtyas TR, Wijonarko A, Mulyantoro M, Firmansyah D, Afifuddin A, Purnama ICG. Current Status and Complexity of Three Begomovirus Species in Pepper Plants in Lowlands and Highlands in Java Island, Indonesia. Viruses 2023; 15:1278. [PMID: 37376578 DOI: 10.3390/v15061278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/21/2023] [Accepted: 05/28/2023] [Indexed: 06/29/2023] Open
Abstract
Three primary species from the Begomovirus genus, Pepper yellow leaf curl Indonesia virus (PepYLCIV), Tomato yellow leaf curl Kanchanaburi virus (TYLCKaV), and Tomato leaf curl New Delhi virus (ToLCNDV), are suspected of spreading throughout pepper production centers, and plants are infected by a single species or a combination of two or three species. This study was conducted to provide complete information about the symptoms, incidence and severity, whitefly biotypes, as well as the dominance status of the three Begomovirus species in pepper-producing areas in Java. A DNA analysis was carried out on leaf samples to identify Begomovirus species and biotypes of B. tabaci collected from 18 areas (16 districts) in lowlands (<400 m asl) and highlands (>700 m asl). The DNA analysis showed that B. tabaci biotype B was the most commonly detected in all locations compared to the A, AN, and Q biotypes. The incidence of begomovirus infection was at a high level, 93% and 88.78% in the lowlands and highlands, respectively. However, the severity of begomovirus infection was significantly higher in the lowlands (54.50%) than in the highlands (38.11%). A single infection of PepYLCIV was most dominant in all locations sampled and caused severe infection, followed by a mixed infection with TYLCKaV. Therefore, the current status of begomovirus infection, especially PepYLCIV, can provide advice to farmers using more tolerant and resistant varieties as well as a breeding strategy for resistant pepper varieties.
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Affiliation(s)
- Andi Wahyono
- Department of Horticulture Crop Research Development, PT BISI International Tbk, Kediri 64293, Indonesia
- Department of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Sleman 55281, Indonesia
| | - Rudi Hari Murti
- Department of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Sleman 55281, Indonesia
| | - Sedyo Hartono
- Department of Plant Protection, Faculty of Agriculture, Universitas Gadjah Mada, Sleman 55281, Indonesia
| | - Tri Rini Nuringtyas
- Department of Tropical Biology, Faculty of Biology, Universitas Gadjah Mada, Sleman 55281, Indonesia
| | - Arman Wijonarko
- Department of Plant Protection, Faculty of Agriculture, Universitas Gadjah Mada, Sleman 55281, Indonesia
| | - Mulyantoro Mulyantoro
- Department of Horticulture Crop Research Development, PT BISI International Tbk, Kediri 64293, Indonesia
| | - Deni Firmansyah
- Department of Horticulture Crop Research Development, PT BISI International Tbk, Kediri 64293, Indonesia
| | - Ahmad Afifuddin
- Department of Biotechnology, PT BISI International Tbk, Kediri 64175, Indonesia
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Fontdevila Pareta N, Khalili M, Maachi A, Rivarez MPS, Rollin J, Salavert F, Temple C, Aranda MA, Boonham N, Botermans M, Candresse T, Fox A, Hernando Y, Kutnjak D, Marais A, Petter F, Ravnikar M, Selmi I, Tahzima R, Trontin C, Wetzel T, Massart S. Managing the deluge of newly discovered plant viruses and viroids: an optimized scientific and regulatory framework for their characterization and risk analysis. Front Microbiol 2023; 14:1181562. [PMID: 37323908 PMCID: PMC10265641 DOI: 10.3389/fmicb.2023.1181562] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/25/2023] [Indexed: 06/17/2023] Open
Abstract
The advances in high-throughput sequencing (HTS) technologies and bioinformatic tools have provided new opportunities for virus and viroid discovery and diagnostics. Hence, new sequences of viral origin are being discovered and published at a previously unseen rate. Therefore, a collective effort was undertaken to write and propose a framework for prioritizing the biological characterization steps needed after discovering a new plant virus to evaluate its impact at different levels. Even though the proposed approach was widely used, a revision of these guidelines was prepared to consider virus discovery and characterization trends and integrate novel approaches and tools recently published or under development. This updated framework is more adapted to the current rate of virus discovery and provides an improved prioritization for filling knowledge and data gaps. It consists of four distinct steps adapted to include a multi-stakeholder feedback loop. Key improvements include better prioritization and organization of the various steps, earlier data sharing among researchers and involved stakeholders, public database screening, and exploitation of genomic information to predict biological properties.
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Affiliation(s)
| | - Maryam Khalili
- Univ. Bordeaux, INRAE, UMR BFP, Villenave d'Ornon, France
- EGFV, Univ. Bordeaux, INRAE, ISVV, Villenave d’Ornon, France
| | | | - Mark Paul S. Rivarez
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
- College of Agriculture and Agri-Industries, Caraga State University, Butuan, Philippines
| | - Johan Rollin
- Plant Pathology Laboratory, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
- DNAVision (Belgium), Charleroi, Belgium
| | - Ferran Salavert
- School of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Coline Temple
- Plant Pathology Laboratory, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Miguel A. Aranda
- Department of Stress Biology and Plant Pathology, Center for Edaphology and Applied Biology of Segura, Spanish National Research Council (CSIC), Murcia, Spain
| | - Neil Boonham
- School of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Marleen Botermans
- Netherlands Institute for Vectors, Invasive Plants and Plant Health (NIVIP), Wageningen, Netherlands
| | | | - Adrian Fox
- School of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom
- Fera Science Ltd, York Biotech Campus, York, United Kingdom
| | | | - Denis Kutnjak
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Armelle Marais
- Univ. Bordeaux, INRAE, UMR BFP, Villenave d'Ornon, France
| | | | - Maja Ravnikar
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Ilhem Selmi
- Plant Pathology Laboratory, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Rachid Tahzima
- Plant Pathology Laboratory, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
- Plant Sciences Unit, Institute for Agricultural, Fisheries and Food Research (ILVO), Merelbeke, Belgium
| | - Charlotte Trontin
- European and Mediterranean Plant Protection Organization, Paris, France
| | - Thierry Wetzel
- DLR Rheinpfalz, Institute of Plant Protection, Neustadt an der Weinstrasse, Germany
| | - Sebastien Massart
- Plant Pathology Laboratory, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
- Bioversity International, Montpellier, France
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Zwolinski AM, Brigden A, Rey MEC. Differences in the 3' intergenic region and the V2 protein of two sequence variants of tomato curly stunt virus play an important role in disease pathology in Nicotiana benthamiana. PLoS One 2023; 18:e0286149. [PMID: 37220127 DOI: 10.1371/journal.pone.0286149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 05/10/2023] [Indexed: 05/25/2023] Open
Abstract
Tomato production in South Africa is threatened by the emergence of tomato curly stunt virus (ToCSV), a monopartite Begomovirus transmitted by the whitefly vector Bemisia tabaci (Genn.). We investigated the role of sequence differences present in the 3' intergenic region (IR) and the V2 coding region on the differing infectivity of ToCSV sequence variant isolates V30 and V22 in the model host Nicotiana benthamiana. Using virus mutant chimeras, we determined that the development of the upward leaf roll symptom phenotype is mediated by sequence differences present in the 3' IR containing the TATA-associated composite element. Sequence differences present in the V2 coding region are responsible for modulating disease severity and symptom recovery in V22-infected plants. Serine substitution of V22 V2 Val27 resulted in a significant increase in disease severity with reduced recovery, the first study to demonstrate the importance of this V2 residue in disease development. Two putative ORFs, C5 and C6, were identified using in silico analysis and detection of an RNA transcript spanning their coding region suggests that these ORFs may be transcribed during infection. Additional virus-derived RNA transcripts spanning multiple ORFs and crossing the boundaries of recognised polycistronic transcripts, as well as the origin of replication within the IR, were detected in ToCSV-infected plants providing evidence of bidirectional readthrough transcription. From our results, we conclude that the diverse responses of the model host to ToCSV infection is influenced by select sequence differences and our findings provide several avenues for further investigation into the mechanisms behind these responses to infection.
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Affiliation(s)
- Alexander M Zwolinski
- School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, South Africa
| | - Alison Brigden
- School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, South Africa
| | - Marie E C Rey
- School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, South Africa
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33
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Atabekova AK, Solovieva AD, Chergintsev DA, Solovyev AG, Morozov SY. Role of Plant Virus Movement Proteins in Suppression of Host RNAi Defense. Int J Mol Sci 2023; 24:ijms24109049. [PMID: 37240394 DOI: 10.3390/ijms24109049] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023] Open
Abstract
One of the systems of plant defense against viral infection is RNA silencing, or RNA interference (RNAi), in which small RNAs derived from viral genomic RNAs and/or mRNAs serve as guides to target an Argonaute nuclease (AGO) to virus-specific RNAs. Complementary base pairing between the small interfering RNA incorporated into the AGO-based protein complex and viral RNA results in the target cleavage or translational repression. As a counter-defensive strategy, viruses have evolved to acquire viral silencing suppressors (VSRs) to inhibit the host plant RNAi pathway. Plant virus VSR proteins use multiple mechanisms to inhibit silencing. VSRs are often multifunctional proteins that perform additional functions in the virus infection cycle, particularly, cell-to-cell movement, genome encapsidation, or replication. This paper summarizes the available data on the proteins with dual VSR/movement protein activity used by plant viruses of nine orders to override the protective silencing response and reviews the different molecular mechanisms employed by these proteins to suppress RNAi.
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Affiliation(s)
- Anastasia K Atabekova
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119992 Moscow, Russia
| | - Anna D Solovieva
- Department of Virology, Biological Faculty, Moscow State University, 119234 Moscow, Russia
| | - Denis A Chergintsev
- Department of Virology, Biological Faculty, Moscow State University, 119234 Moscow, Russia
| | - Andrey G Solovyev
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119992 Moscow, Russia
- Department of Virology, Biological Faculty, Moscow State University, 119234 Moscow, Russia
| | - Sergey Y Morozov
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119992 Moscow, Russia
- Department of Virology, Biological Faculty, Moscow State University, 119234 Moscow, Russia
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Gao L, Anane RF, Chen Z, He Y, Li S, Zi S, Yang Z, Chu B, Wen G, Zhao M. Complete genome sequence analysis of a novel citlodavirus isolated from the leaves of Myrica rubra in Yunnan. Arch Virol 2023; 168:139. [PMID: 37059886 DOI: 10.1007/s00705-023-05762-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/29/2023] [Indexed: 04/16/2023]
Abstract
Through high-throughput sequencing, a novel citlodavirus, tentatively named "Myrica rubra citlodavirus 1" (MRV1, accession no. OP374189), was isolated from the leaves of Myrica rubra in Yunnan exhibiting narrow deformity of leaf tips, shrinkage, and chlorosis along the veins. The complete genome sequence was determined and analyzed using cloning and Sanger sequencing. MRV1 is a single-stranded circular non-enveloped DNA virus with a genome size of 3775 nucleotides and contains six open reading frames (ORFs). The virion-sense genome strand encodes a coat protein (CP, nt 750-1,493, 247 aa), two hypothetical movement proteins (V3, nt 382-666, 94 aa; and V2, nt 461-895, 144 aa), and one movement protein (MP, nt 1,527-2,438, 303 aa). The complementary strand of the genome encodes two replication proteins (RepA, nt 3,712-2,834, 292 aa; Rep, nt 2,867-2,553, 104 aa). The MRV1 genome contains the stem-loop motif 5'-TAATATTAC-3', which is a highly conserved nonanucleotide motif found in the origin of virion-strand replication in geminiviruses. Genome sequence alignment analysis showed that citrus chlorotic dwarf associated virus (CCDaV, accession no. JQ920490) shared the highest nucleotide sequence similarity (66.10% identity) with MRV1. Phylogenetic analysis showed that CCDaV is the closest known relative of MRV1, and that these viruses clustered in a single branch within a clade consisting of citlodaviruses. These results indicate that MRV1 should be regarded as a new species of the genus Citlodavirus in the family Geminiviridae.
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Affiliation(s)
- Like Gao
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China
| | - Rex Frimpong Anane
- Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, 23 Innovation Walk, Clayton, VIC, 3800, Australia
| | - Zeli Chen
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China
- College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
| | - Yueqiu He
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
| | - Shangyun Li
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China
- College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
| | - Shaomei Zi
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China
| | - Zefen Yang
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China
- College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
| | - Bifan Chu
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China
| | - Guosong Wen
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China.
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China.
- College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China.
| | - Mingfu Zhao
- Key Laboratory for Agricultural Biodiversity for Pest Management of China, Ministry of Education, Yunnan Agricultural University, No. 95, Jinhei Road, Panlong District, Kunming, 650201, Yunnan, China.
- Research and Development Center for Health Product, College of Agronomy and Biotechnology, Yunnan Agricultural University, No. 95, Jinhei Road, Kunming, 650201, Yunnan, China.
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Chaowongdee S, Malichan S, Pongpamorn P, Paemanee A, Siriwan W. Metabolic profiles of Sri Lankan cassava mosaic virus-infected and healthy cassava (Manihot esculenta Crantz) cultivars with tolerance and susceptibility phenotypes. BMC PLANT BIOLOGY 2023; 23:178. [PMID: 37020181 PMCID: PMC10074701 DOI: 10.1186/s12870-023-04181-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Cassava mosaic disease (CMD) of cassava (Manihot esculenta Crantz) has expanded across many continents. Sri Lankan cassava mosaic virus (SLCMV; family Geminiviridae), which is the predominant cause of CMD in Thailand, has caused agricultural and economic damage in many Southeast Asia countries such as Vietnam, Loas, and Cambodia. The recent SLCMV epidemic in Thailand was commonly found in cassava plantations. Current understanding of plant-virus interactions for SLCMV and cassava is limited. Accordingly, this study explored the metabolic profiles of SLCMV-infected and healthy groups of tolerant (TME3 and KU50) and susceptible (R11) cultivars of cassava. Findings from the study may help to improve cassava breeding, particularly when combined with future transcriptomic and proteomic research. RESULTS SLCMV-infected and healthy leaves were subjected to metabolite extraction followed by ultra-high-performance liquid chromatography high-resolution mass spectrometry (UHPLC-HRMS/MS). The resulting data were analyzed using Compound Discoverer software, the mzCloud, mzVault, and ChemSpider databases, and published literature. Of the 85 differential compounds (SLCMV-infected vs healthy groups), 54 were differential compounds in all three cultivars. These compounds were analyzed using principal component analysis (PCA), hierarchical clustering dendrogram analysis, heatmap analysis, and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway annotation. Chlorogenic acid, DL-carnitine, neochlorogenic acid, (E)-aconitic acid, and ascorbyl glucoside were differentially expressed only in TME3 and KU50, with chlorogenic acid, (E)-aconitic acid, and neochlorogenic acid being downregulated in both SLCMV-infected TME3 and KU50, DL-carnitine being upregulated in both SLCMV-infected TME3 and KU50, and ascorbyl glucoside being downregulated in SLCMV-infected TME3 but upregulated in SLCMV-infected KU50. Furthermore, 7-hydroxycoumarine was differentially expressed only in TME3 and R11, while quercitrin, guanine, N-acetylornithine, uridine, vorinostat, sucrose, and lotaustralin were differentially expressed only in KU50 and R11. CONCLUSIONS Metabolic profiling of three cassava landrace cultivars (TME3, KU50, and R11) was performed after SLCMV infection and the profiles were compared with those of healthy samples. Certain differential compounds (SLCMV-infected vs healthy groups) in different cultivars of cassava may be involved in plant-virus interactions and could underlie the tolerance and susceptible responses in this important crop.
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Affiliation(s)
- Somruthai Chaowongdee
- Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand
- Center of Excellence on Agricultural Biotechnology (AG-BIO/MHESI), Bangkok, 10900, Thailand
| | - Srihunsa Malichan
- Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand
| | - Pornkanok Pongpamorn
- National Omics Center (NOC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand
| | - Atchara Paemanee
- National Omics Center (NOC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand
| | - Wanwisa Siriwan
- Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand.
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Rosas-Diaz T, Cana-Quijada P, Wu M, Hui D, Fernandez-Barbero G, Macho AP, Solano R, Castillo AG, Wang XW, Lozano-Duran R, Bejarano ER. The transcriptional regulator JAZ8 interacts with the C2 protein from geminiviruses and limits the geminiviral infection in Arabidopsis. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2023. [PMID: 36946519 DOI: 10.1111/jipb.13482] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 03/17/2023] [Indexed: 05/06/2023]
Abstract
Jasmonates (JAs) are phytohormones that finely regulate critical biological processes, including plant development and defense. JASMONATE ZIM-DOMAIN (JAZ) proteins are crucial transcriptional regulators that keep JA-responsive genes in a repressed state. In the presence of JA-Ile, JAZ repressors are ubiquitinated and targeted for degradation by the ubiquitin/proteasome system, allowing the activation of downstream transcription factors and, consequently, the induction of JA-responsive genes. A growing body of evidence has shown that JA signaling is crucial in defending against plant viruses and their insect vectors. Here, we describe the interaction of C2 proteins from two tomato-infecting geminiviruses from the genus Begomovirus, tomato yellow leaf curl virus (TYLCV) and tomato yellow curl Sardinia virus (TYLCSaV), with the transcriptional repressor JAZ8 from Arabidopsis thaliana and its closest orthologue in tomato, SlJAZ9. Both JAZ and C2 proteins colocalize in the nucleus, forming discrete nuclear speckles. Overexpression of JAZ8 did not lead to altered responses to TYLCV infection in Arabidopsis; however, knock-down of JAZ8 favors geminiviral infection. Low levels of JAZ8 likely affect the viral infection specifically, since JAZ8-silenced plants neither display obvious developmental phenotypes nor present differences in their interaction with the viral insect vector. In summary, our results show that the geminivirus-encoded C2 interacts with JAZ8 in the nucleus, and suggest that this plant protein exerts an anti-geminiviral effect.
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Affiliation(s)
- Tabata Rosas-Diaz
- Departamento de Biología Celular, Genética y Fisiología, Facultad de Ciencias, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM-UMA-CSIC), Universidad de Málaga, Málaga, Spain
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602, China
| | - Pepe Cana-Quijada
- Departamento de Biología Celular, Genética y Fisiología, Facultad de Ciencias, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM-UMA-CSIC), Universidad de Málaga, Málaga, Spain
| | - Mengshi Wu
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602, China
| | - Du Hui
- Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Gemma Fernandez-Barbero
- Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, Madrid, 28049, Spain
| | - Alberto P Macho
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602, China
| | - Roberto Solano
- Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, Madrid, 28049, Spain
| | - Araceli G Castillo
- Departamento de Biología Celular, Genética y Fisiología, Facultad de Ciencias, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM-UMA-CSIC), Universidad de Málaga, Málaga, Spain
| | - Xiao-Wei Wang
- Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Rosa Lozano-Duran
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602, China
- Department of Plant Biochemistry, Centre for Plant Molecular Biology, Eberhard Karls University, Tübingen, D-72076, Germany
| | - Eduardo R Bejarano
- Departamento de Biología Celular, Genética y Fisiología, Facultad de Ciencias, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM-UMA-CSIC), Universidad de Málaga, Málaga, Spain
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37
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Gomathi Devi R, Jothika C, Sankari A, Lakshmi S, Malathi VG, Renukadevi P. Seed Transmission of Begomoviruses: A Potential Threat for Bitter Gourd Cultivation. PLANTS (BASEL, SWITZERLAND) 2023; 12:1396. [PMID: 36987084 PMCID: PMC10057619 DOI: 10.3390/plants12061396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Bitter gourd (Momordica charantia L.), one of the valued vegetable crops in India, is severely affected by yellow mosaic disease caused by two begomoviruses, tomato leaf curl New Delhi virus (ToLCNDV) and bitter gourd yellow mosaic virus (BgYMV). The symptoms are yellowing, distortion of leaf, puckering, and malformed fruits. Increased incidence of the disease and appearance of symptoms even in young emerging seedling stage were suggestive of seed transmission of the viruses, which was examined in detail. To study the seed transmission, two sources-seeds of elite hybrids H1, H2, H3, H4, and Co1 procured from a seed market; and seeds from infected plants in the farmer's field were tested. Detection of the virus by DAS-ELISA using polyclonal antibody indicated embryo infection up to 63%, 26%, 20%, and 10% in hybrids H1, H2, H3, and H4, respectively, for market-procured seeds. In PCR analysis with primers specific for ToLCNDV and BgYMV, infection by ToLCNDV was as high as 76% and mixed infection was 24%. In contrast, in seeds derived from field-infected plants, the percentage detection was less. Grow-out tests with market-procured seeds revealed no transmission for BgYMV compared with 5% transmission for ToLCNDV. Whether seed-borne inocula could serve as an inoculum for new infection in a field and further progress of the disease was investigated in a microplot study. The study clearly revealed variation in seed transmission between different sources, lots, cultivars, and viruses. The virus present in symptomatic and asymptomatic plants was easily transmitted by whitefly. In another microplot experiment, the potential of seed-borne virus as inoculum was proved. There was 43.3% initial seed transmission in the microplot, increasing to 70% after release of 60 whiteflies.
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Affiliation(s)
- Ravisankar Gomathi Devi
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
| | - Chinnaraj Jothika
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
| | - Arjunan Sankari
- Department of Vegetable Science, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
| | - Sethuraman Lakshmi
- Department of Seed Science and Technology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
| | - Varagur Ganesan Malathi
- Retired Scientist, ICAR-IARI, GI, Sree Kumaran Hill Crest Apartment, Coimbatore 641046, Tamil Nadu, India
| | - Perumal Renukadevi
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
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Virus-Induced Gene Silencing (VIGS): A Powerful Tool for Crop Improvement and Its Advancement towards Epigenetics. Int J Mol Sci 2023; 24:ijms24065608. [PMID: 36982682 PMCID: PMC10057534 DOI: 10.3390/ijms24065608] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/26/2023] [Accepted: 02/02/2023] [Indexed: 03/17/2023] Open
Abstract
Virus-induced gene silencing (VIGS) is an RNA-mediated reverse genetics technology that has evolved into an indispensable approach for analyzing the function of genes. It downregulates endogenous genes by utilizing the posttranscriptional gene silencing (PTGS) machinery of plants to prevent systemic viral infections. Based on recent advances, VIGS can now be used as a high-throughput tool that induces heritable epigenetic modifications in plants through the viral genome by transiently knocking down targeted gene expression. As a result of the progression of DNA methylation induced by VIGS, new stable genotypes with desired traits are being developed in plants. In plants, RNA-directed DNA methylation (RdDM) is a mechanism where epigenetic modifiers are guided to target loci by small RNAs, which play a major role in the silencing of the target gene. In this review, we described the molecular mechanisms of DNA and RNA-based viral vectors and the knowledge obtained through altering the genes in the studied plants that are not usually accessible to transgenic techniques. We showed how VIGS-induced gene silencing can be used to characterize transgenerational gene function(s) and altered epigenetic marks, which can improve future plant breeding programs.
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Mirtaleb MS, Falak R, Heshmatnia J, Bakhshandeh B, Taheri RA, Soleimanjahi H, Zolfaghari Emameh R. An insight overview on COVID-19 mRNA vaccines: Advantageous, pharmacology, mechanism of action, and prospective considerations. Int Immunopharmacol 2023; 117:109934. [PMID: 36867924 PMCID: PMC9968612 DOI: 10.1016/j.intimp.2023.109934] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/09/2023] [Accepted: 02/21/2023] [Indexed: 03/01/2023]
Abstract
The worldwide spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has urged scientists to present some novel vaccine platforms during this pandemic to provide a rather prolonged immunity against this respiratory viral infection. In spite of many campaigns formed against the administration of mRNA-based vaccines, those platforms were the most novel types, which helped us meet the global demand by developing protection against COVID-19 and reducing the development of severe forms of this respiratory viral infection. Some societies are worry about the COVID-19 mRNA vaccine administration and the potential risk of genetic integration of inoculated mRNA into the human genome. Although the efficacy and long-term safety of mRNA vaccines have not yet been fully clarified, obviously their application has switched the mortality and morbidity of the COVID-19 pandemic. This study describes the structural features and technologies used in producing of COVID-19 mRNA-based vaccines as the most influential factor in controlling this pandemic and a successful pattern for planning to produce other kind of genetic vaccines against infections or cancers.
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Affiliation(s)
- Mona Sadat Mirtaleb
- Department of Energy and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), 14965/161, Tehran, Iran; Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran.
| | - Reza Falak
- Immunology Research Center, Iran University of Medical Sciences, Tehran, Iran; Immunology Department, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Jalal Heshmatnia
- Chronic Respiratory Diseases Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Behnaz Bakhshandeh
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran.
| | - Ramezan Ali Taheri
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Hoorieh Soleimanjahi
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Reza Zolfaghari Emameh
- Department of Energy and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), 14965/161, Tehran, Iran.
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Namuddu A, Seal S, van Brunschot S, Malka O, Kabaalu R, Morin S, Omongo C, Colvin J. Distribution of Bemisia tabaci in different agro-ecological regions in Uganda and the threat of vector-borne pandemics into new cassava growing areas. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2023. [DOI: 10.3389/fsufs.2023.1068109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Previous studies in sub-Saharan Africa have showed the spread of cassava mosaic disease (CMD) and cassava brown streak disease (CBSD) pandemics into different cassava growing regions by high Bemisia tabaci populations. Studies did indicate that there were stark differences in some whitefly species, yet they have not looked extensively across agroecologies. Members of B. tabaci species complex termed sub-Saharan Africa 1 (SSA1) and SSA2 have been linked to the spread of CMD and CBSD viruses. During the period of a severe CMD pandemic in the 1990s, SSA2 was the most predominant until the resurgence of SSA1, particularly SSA1-subgroup1 (SSA1-SG1) from the early 2000s to date. Cassava being a drought resilient crop has become an important food security crop and has been introduced into new areas and regions. Considering the role B. tabaci in the spread of cassava virus pandemics into neighboring regions, we investigated the genetic diversity and distribution of B. tabaci in nine different agro-ecological regions of Uganda in 2017. Adult whiteflies were collected from cassava and 33 other host plants from cassava-growing areas, those with limited cassava and areas with no cassava, where it is being introduced as a food security crop. The partial sequences of the mitochondrial cytochrome oxidase 1 (mtCO1) gene (657 bp) were used to determine the phylogenetic relationships between the sampled B. tabaci. Cassava B. tabaci SSA1 (-SG1, -SG2, -Hoslundia (previously called SSA1-SG1/2), -SG3), SSA2 and SSA3; non-cassava B. tabaci SSA6, SSA10, SSA11, SSA12, SSA13, MED-ASL, MED-Q1, MEAM1, Indian Ocean; and other Bemisia species, Bemisia afer and Bemisia Uganda1 were identified in the study. SSA3, one of the key B. tabaci species that occurs on cassava in West Africa, was identified for the first time in Uganda. The SSA1-SG1 was widely distributed, predominated on cassava and was found on 17 other host-plants. The ability of SSA1-SG1 to exist in environments with limited or no cassava growing poses the risk of continued spread of virus pandemics. Therefore, measures must be put in place to prevent the introduction of diseased materials into new areas, since the vectors exist.
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Fortes IM, Pérez-Padilla V, Romero-Rodríguez B, Fernández-Muñoz R, Moyano C, Castillo AG, De León L, Moriones E. Begomovirus Tomato Leaf Curl New Delhi Virus Is Seedborne but Not Seed Transmitted in Melon. PLANT DISEASE 2023; 107:473-479. [PMID: 35771117 DOI: 10.1094/pdis-09-21-1930-re] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Seed transmission can be of considerable relevance to the dissemination of plant viruses in nature and for their prevalence and perpetuation. Long-distance spread of isolates of the begomovirus species Tomato leaf curl New Delhi virus (genus Begomovirus, family Geminiviridae) has recently occurred from Asia to the Middle East and the Mediterranean Basin. Here, we investigated the possible transmission by melon (Cucumis melo L.) seeds of a tomato leaf curl New Delhi virus (ToLCNDV) isolate of the "Spain" strain widely distributed in the Mediterranean area as an alternative mechanism for long-distance spread. PCR amplification detection of ToLCNDV in floral parts and mature seeds of melon plants reveals that this virus is seedborne. "Seedborne" is defined as the ability of a virus to be carried through seeds, which does not necessarily lead to transmission to the next generation. Treatment with a chemical disinfectant significantly reduced the detectable virus associated with melon seeds, suggesting ToLCNDV contamination of the external portion of the seed coat. Also, when the internal fraction of the mature seed (seed cotyledons + embryo) was analyzed by quantitative PCR amplification, ToLCNDV was detectable at low levels, suggesting the potential for viral contamination or infection of the internal portions of seed. However, grow-out studies conducted with melon progeny plants germinated from mature seeds collected from ToLCNDV-infected plants and evaluated at early (1-leaf) or at late (20-leaf) growth stages did not support the transmission of ToLCNDV from seeds to offspring.
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Affiliation(s)
- Isabel M Fortes
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM), Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental "La Mayora", E-29750 Algarrobo-Costa, Málaga, Spain
| | - Verónica Pérez-Padilla
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. de La Coruña, km 7.5, E-28040 Madrid, Spain
| | - Beatriz Romero-Rodríguez
- IHSM, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Área de Genética, Facultad de Ciencias, Universidad de Málaga, E-29071, Málaga, Spain
| | - Rafael Fernández-Muñoz
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM), Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental "La Mayora", E-29750 Algarrobo-Costa, Málaga, Spain
| | - Cristina Moyano
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. de La Coruña, km 7.5, E-28040 Madrid, Spain
| | - Araceli G Castillo
- IHSM, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Área de Genética, Facultad de Ciencias, Universidad de Málaga, E-29071, Málaga, Spain
| | - Leandro De León
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. de La Coruña, km 7.5, E-28040 Madrid, Spain
| | - Enrique Moriones
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM), Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental "La Mayora", E-29750 Algarrobo-Costa, Málaga, Spain
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Lestari SM, Hidayat SH, Hidayat P, Kil EJ, Lee S, Kim SM, Lee KY. Identification of begomoviruses associated with the insect vector Bemisia tabaci and various host plants on Java Island, Indonesia. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2023; 112:e21984. [PMID: 36397643 DOI: 10.1002/arch.21984] [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: 08/29/2022] [Revised: 10/13/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
Begomoviruses are economically important plant viruses and are transmitted by Bemisia tabaci which is a complex of various cryptic species. However, it is uncertain whether most begomoviruses that infect host plants are transmitted by B. tabaci at a similar rate. We compared the begomovirus profiles that were detected in a total of 37 whitefly populations and 52 host plants on Java Island, Indonesia. Seven begomovirus species were detected in B. tabaci at different rates: pepper yellow leaf curl Indonesia virus (PepYLCIV, 56.8%), tomato yellow leaf curl Kanchanaburi virus (TYLCKaV, 46.0%), tomato leaf curl New Delhi virus (ToLCNDV, 21.6%), squash leaf curl China virus (SLCCNV, 21.6%), ageratum yellow vein China virus (AYVCNV, 2.7%), mungbean yellow mosaic India virus (MYMIV, 2.7%), and okra enation leaf curl virus (OELCuV, 2.7%). The begomoviruses were detected at different rates in three cryptic species of B. tabaci. In addition, six begomovirus species were detected in the various host plants at different rates: PepYLCIV (67.3%), TYLCKaV (53.9%), ToLCNDV (13.5%), MYMIV (11.5%), AYVCNV (3.9%), and Tomato yellow leaf curl Thailand virus (TYLCTHV) (1.9%). By comparing the virus presence between whiteflies and plants, five begomoviruses (AYVCNV, MYMIV, PepYLCIV, ToLCNDV, and TYLCKaV) were detected in both samples, but their sequence similarity was highly variable depending on the begomovirus themselves; TYLCKaV was highest (99.4%-100%) than any other viruses. Our study suggests B. tabaci acquire begomoviruses at different rates from plants. This study provides important information on the potential variation in the begomovirus transmission mechanism.
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Affiliation(s)
- Susanti M Lestari
- Division of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Korea
| | - Sri H Hidayat
- Department of Plant Protection, Faculty of Agriculture, IPB University, Bogor, Indonesia
| | - Purnama Hidayat
- Department of Plant Protection, Faculty of Agriculture, IPB University, Bogor, Indonesia
| | - Eui-Joon Kil
- Department of Plant Medicals, Andong National University, Andong, Korea
| | - Sukchan Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Korea
| | - Sang-Mok Kim
- Plant Quarantine Technology Center, Animal and Plant Quarantine Agency, Gimcheon, Korea
| | - Kyeong-Yeoll Lee
- Division of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Korea
- Institute of Plant Medicine, Kyungpook National University, Daegu, Korea
- Quantum Bio Research Center, Kyungpook National University, Gunwi, Korea
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Naganur P, Shankarappa KS, Mesta RK, Rao CD, Venkataravanappa V, Maruthi MN, Reddy LRCN. Detecting Tomato Leaf Curl New Delhi Virus Causing Ridge Gourd Yellow Mosaic Disease, and Other Begomoviruses by Antibody-Based Methods. PLANTS (BASEL, SWITZERLAND) 2023; 12:490. [PMID: 36771575 PMCID: PMC9919216 DOI: 10.3390/plants12030490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/03/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
The incidence and severity of begomovirus diseases have been increasing around the world recently, and the ridge gourd [Luffa acutangula (Roxb.) L.] is the latest example of a crop that has become highly susceptible to the outbreak of the tomato leaf curl New Delhi virus (ToLCNDV, genus Begomovirus) in India. Accurate diagnosis of causal agents is important in designing disease management strategies. In this study the coat protein (CP) gene from a ToLCNDV-Rg ridge gourd isolate was used to produce polyclonal antibodies (ToLCNDV-Rg-CP-PAb) in a rabbit. The antibodies successfully detected a 30.5 kDa ToLCNDV-Rg-CP in extracts of symptomatic ridge gourd leaf samples by several assays, such as Western Blotting (WB), Dot Immuno Binding Assay (DIBA), Direct Antigen Coating Enzyme Linked Immuno Sorbent Assay (DAC-ELISA), Immuno Capture Polymerase Chain Reaction (IC-PCR), and Immuno Capture Loop-Mediated Isothermal Amplification (IC-LAMP) assays. However, none of the negative samples tested positive in either of the detection methods. Among all the methods tested, the immunocapture assay, IC-LAMP, was the most sensitive in detecting ToLCNDV-Rg. Furthermore, antibodies generated in this study also detected other commonly occurring begomoviruses in South India, such as tomato leaf curl Palampur virus and squash leaf curl China virus in cucurbits. Together, ToLCNDV-Rg-CP-PAb can be used for detecting at least three species of begomoviruses infecting cucurbits. The obtained antibodies will contribute to monitoring disease outbreaks in multiple crops.
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Affiliation(s)
- Priya Naganur
- Department of Plant Pathology, College of Horticulture, University of Horticultural Sciences, Bengaluru 560065, Karnataka, India
- Department of Plant Pathology, College of Horticulture, University of Horticultural Sciences, Bagalkot 587101, Karnataka, India
| | - Kodegandlu Subbanna Shankarappa
- Department of Plant Pathology, College of Horticulture, University of Horticultural Sciences, Bengaluru 560065, Karnataka, India
| | - Raghavendra K. Mesta
- Department of Plant Pathology, College of Horticulture, University of Horticultural Sciences, Bagalkot 587101, Karnataka, India
| | - Chilakalapudi Durga Rao
- Department of Biology, SRM University, Mangalagiri Mandal, Neerukonda, Amaravati 522502, Andhra Pradesh, India
| | - Venkataravanappa Venkataravanappa
- Division of Crop Protection, ICAR-Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bengaluru 560089, Karnataka, India
| | - Midatharahally Narasegowda Maruthi
- Agriculture, Health and Environment Department, Natural Resources Institute, University of Greenwich, Medway Campus, Chatham, Kent ME4 4TB, UK
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Neoh ZY, Lai HC, Lin CC, Suwor P, Tsai WS. Genetic Diversity and Geographic Distribution of Cucurbit-Infecting Begomoviruses in the Philippines. PLANTS (BASEL, SWITZERLAND) 2023; 12:272. [PMID: 36678986 PMCID: PMC9862860 DOI: 10.3390/plants12020272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/18/2022] [Accepted: 12/25/2022] [Indexed: 06/17/2023]
Abstract
Cucurbits are important economic crops worldwide. However, the cucurbit leaf curl disease (CuLCD), caused by whitefly-transmitted begomoviruses constrains their production. In Southeast Asia, three major begomoviruses, Tomato leaf curl New Delhi virus (ToLCNDV), Squash leaf curl China virus (SLCCNV) and Squash leaf curl Philippines virus (SLCuPV) are associated with CuLCD. SLCuPV and SLCCNV were identified in Luzon, the Philippines. Here, the genetic diversity and geographic distribution of CuLCD-associated begomoviruses in the Philippines were studied based on 103 begomovirus detected out of 249 cucurbit samples collected from 60 locations throughout the country in 2018 and 2019. The presence of SLCCNV and SLCuPV throughout the Philippines were confirmed by begomovirus PCR detection and viral DNA sequence analysis. SLCuPV was determined as a predominant CuLCD-associated begomovirus and grouped into two strains. Interestingly, SLCCNV was detected in pumpkin and bottle gourd without associated viral DNA-B and mixed-infected with SLCuPV. Furthermore, the pathogenicity of selected isolates of SLCCNV and SLCuPV was confirmed. The results provide virus genetic diversity associated with CuLCD for further disease management, especially in developing the disease-resistant cultivars in the Philippines as well as Southeast Asia.
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Affiliation(s)
- Zhuan Yi Neoh
- Department of Plant Medicine, National Chiayi University, Chiayi City 600355, Taiwan
| | - Hsuan-Chun Lai
- Department of Plant Medicine, National Chiayi University, Chiayi City 600355, Taiwan
| | | | - Patcharaporn Suwor
- Agriculture Technology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - Wen-Shi Tsai
- Department of Plant Medicine, National Chiayi University, Chiayi City 600355, Taiwan
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García-Rodríguez DA, Partida-Palacios BL, Regla-Márquez CF, Centeno-Leija S, Serrano-Posada H, Bañuelos-Hernández B, Cárdenas-Conejo Y. Sida chlorotic leaf virus: a new recombinant begomovirus found in non-cultivated plants and Cucumis sativus L. PeerJ 2023; 11:e15047. [PMID: 36974135 PMCID: PMC10039651 DOI: 10.7717/peerj.15047] [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: 09/21/2022] [Accepted: 02/21/2023] [Indexed: 03/29/2023] Open
Abstract
Background Begomoviruses are circular single-stranded DNA plant viruses that cause economic losses worldwide. Weeds have been pointed out as reservoirs for many begomoviruses species, especially from members of the Sida and Malvastrum genera. These weeds have the ability to host multiple begomoviruses species simultaneously, which can lead to the emergence of new viral species that can spread to commercial crops. Additionally, begomoviruses have a natural tendency to recombine, resulting in the emergence of new variants and species. Methods To explore the begomoviruses biodiversity in weeds from genera Sida and Malvastrum in Colima, México, we collected symptomatic plants from these genera throughout the state. To identify BGVs infecting weeds, we performed circular DNA genomics (circomics) using the Illumina platform. Contig annotation was conducted with the BLASTn tool using the GenBank nucleotide "nr" database. We corroborated by PCR the presence of begomoviruses in weeds samples and isolated and sequenced the complete genome of a probable new species of begomovirus using the Sanger method. The demarcation process for new species determination followed the International Committee on Taxonomy of Viruses criteria. Phylogenetic and recombination analyses were implemented to infer the evolutionary relationship of the new virus. Results We identified a new begomovirus species from sida and malvastrum plants that has the ability to infect Cucumis sativus L. According to our findings, the novel species Sida chlorotic leaf virus is the result of a recombination event between one member of the group known as the Squash leaf curl virus (SLCV) clade and another from the Abutilon mosaic virus (AbMV) clade. Additionally, we isolated three previously identified begomoviruses species, two of which infected commercial crops: okra (Okra yellow mosaic Mexico virus) and cucumber (Cucumber chlorotic leaf virus). Conclusion These findings support the idea that weeds act as begomovirus reservoirs and play essential roles in begomovirus biodiversity. Therefore, controlling their populations near commercial crops must be considered in order to avoid the harmful effects of these phytopathogens and thus increase agricultural efficiency, ensuring food and nutritional security.
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Affiliation(s)
| | | | | | - Sara Centeno-Leija
- Universidad de Colima, Consejo Nacional de Ciencia y Tecnología-Laboratorio de Biología Sintética, Estructural y Molecular, Colima, México
| | - Hugo Serrano-Posada
- Universidad de Colima, Consejo Nacional de Ciencia y Tecnología-Laboratorio de Biología Sintética, Estructural y Molecular, Colima, México
| | | | - Yair Cárdenas-Conejo
- Universidad de Colima, Consejo Nacional de Ciencia y Tecnología-Laboratorio de Biología Sintética, Estructural y Molecular, Colima, México
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AlHudaib KA, Almaghasla MI, El-Ganainy SM, Arshad M, Drou N, Sattar MN. High-Throughput Sequencing Identified Distinct Bipartite and Monopartite Begomovirus Variants Associated with DNA-Satellites from Tomato and Muskmelon Plants in Saudi Arabia. PLANTS (BASEL, SWITZERLAND) 2022; 12:6. [PMID: 36616136 PMCID: PMC9824426 DOI: 10.3390/plants12010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
The studies on the prevalence and genetic diversity of begomoviruses in Saudi Arabia are minimal. In this study, field-grown symptomatic tomato and muskmelon plants were collected, and initially, begomovirus infection was confirmed by the core coat protein sequences. Four tomato and two muskmelon plants with viral infections were further evaluated for Illumina MiSeq sequencing, and twelve sequences (2.7-2.8 kb) equivalent to the full-length DNA-A or DNA-B components of begomoviruses were obtained along with eight sequences (~1.3-1.4 kb) equivalent to the begomovirus-associated DNA-satellite components. Four begomovirus sequences obtained from tomato plants were variants of tomato yellow leaf curl virus (TYLCV) with nt sequence identities of 95.3-100%. Additionally, two tomato plants showed a mixed infection of TYLCV and cotton leaf curl Gezira virus (CLCuGeV), okra yellow crinkle Cameroon alphasatellite (OYCrCMA), and okra leaf curl Oman betasatellite (OLCuOMB). Meanwhile, from muskmelon plants, two sequences were closely related (99-99.6%) to the tomato leaf curl Palampur virus (ToLCPalV) DNA-A, whereas two other sequences showed 97.9-100% sequence identities to DNA-B of ToLCPalV, respectively. Complete genome sequences of CLCuGeV and associated DNA-satellites were also obtained from these muskmelon plants. The nt sequence identities of the CLCuGeV, OYCrCMA, and OLCuOMB isolates obtained were 98.3-100%, 99.5-100%, and 95.6-99.7% with their respective available variants. The recombination was only detected in TYLCV and OLCuOMB isolates. To our knowledge, this is the first identification of a mixed infection of bipartite and monopartite begomoviruses associated with DNA-satellites from tomato and muskmelon in Saudi Arabia. The begomovirus variants reported in this study were clustered with Iranian isolates of respective begomovirus components in the phylogenetic dendrogram. Thus, the Iranian agroecological route can be a possible introduction of these begomoviruses and/or their associated DNA-satellites into Saudi Arabia.
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Affiliation(s)
- Khalid A. AlHudaib
- Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Pests and Plant Diseases Unit, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
| | - Mostafa I. Almaghasla
- Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Pests and Plant Diseases Unit, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
| | - Sherif M. El-Ganainy
- Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Plant Pathology Research Institute, Agricultural Research Center, Giza 12619, Egypt
| | - Muhammad Arshad
- Bioinformatics Core, Center for Genomics & Systems Biology, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
| | - Nizar Drou
- Bioinformatics Core, Center for Genomics & Systems Biology, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
| | - Muhammad N. Sattar
- Central Laboratories, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
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Multiple begomoviruses infecting soybean; a case study in Faisalabad, Pakistan. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01290-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Melgarejo TA, Chen LF, Rojas MR, Schilder A, Gilbertson RL. Curly Top Disease of Hemp ( Cannabis sativa) in California Is Caused by Mild-Type Strains of Beet curly top virus Often in Mixed Infection. PLANT DISEASE 2022; 106:3022-3026. [PMID: 35549320 DOI: 10.1094/pdis-04-22-0856-sc] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Interest in industrial hemp (Cannabis sativa) as a potential crop led to the establishment of commercial fields in a number of counties in California in 2019 and 2020. Plants in these fields developed different types of virus-like symptoms. The most prevalent type was stunted and bushy plants with distorted, upcurled, and yellowed leaves, which were similar to those associated with curly top disease (CTD) caused by the beet curly top virus (BCTV). This beet leafhopper-vectored virus is endemic in California and can cause economic losses to processing tomato production. Using a multiplex PCR test, BCTV infection was detected in 89% of hemp samples with CTD-like symptoms from Fresno, San Bernardino, and Ventura counties. Other symptom types had low incidence of BCTV infection and were associated with other factors. Hemp plants in California were infected only with the mild-type strains, BCTV-CO and BCTV-Wor, and often in mixed infection (43% of samples). Finally, using an infectious clone of a BCTV-CO isolate from hemp, we demonstrated that agroinoculated hemp plants developed these CTD-like symptoms, thereby fulfilling Koch's postulates for the disease.
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Affiliation(s)
- Tomas A Melgarejo
- Department of Plant Pathology, University of California, Davis, Davis, CA 95616
| | - Li-Fang Chen
- Bayer Vegetables Research and Development, Woodland, CA 95695
| | - Maria R Rojas
- Department of Plant Pathology, University of California, Davis, Davis, CA 95616
| | | | - Robert L Gilbertson
- Department of Plant Pathology, University of California, Davis, Davis, CA 95616
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Lappe RR, Elmore MG, Lozier ZR, Jander G, Miller WA, Whitham SA. Metagenomic identification of novel viruses of maize and teosinte in North America. BMC Genomics 2022; 23:767. [DOI: 10.1186/s12864-022-09001-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/10/2022] [Indexed: 11/25/2022] Open
Abstract
Abstract
Background
Maize-infecting viruses are known to inflict significant agronomic yield loss throughout the world annually. Identification of known or novel causal agents of disease prior to outbreak is imperative to preserve food security via future crop protection efforts. Toward this goal, a large-scale metagenomic approach utilizing high throughput sequencing (HTS) was employed to identify novel viruses with the potential to contribute to yield loss of graminaceous species, particularly maize, in North America.
Results
Here we present four novel viruses discovered by HTS and individually validated by Sanger sequencing. Three of these viruses are RNA viruses belonging to either the Betaflexiviridae or Tombusviridae families. Additionally, a novel DNA virus belonging to the Geminiviridae family was discovered, the first Mastrevirus identified in North American maize.
Conclusions
Metagenomic studies of crop and crop-related species such as this may be useful for the identification and surveillance of known and novel viral pathogens of crops. Monitoring related species may prove useful in identifying viruses capable of infecting crops due to overlapping insect vectors and viral host-range to protect food security.
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50
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Vo TTB, Troiano E, Lal A, Hoang PT, Kil EJ, Lee S, Parrella G. ToLCNDV-ES infection in tomato is enhanced by TYLCV: Evidence from field survey and agroinoculation. Front Microbiol 2022; 13:954460. [PMID: 36425034 PMCID: PMC9679516 DOI: 10.3389/fmicb.2022.954460] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 09/28/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Thuy Thi Bich Vo
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Elisa Troiano
- Institute for Sustainable Plant Protection, National Research Council (IPSP-CNR), Portici, Italy
| | - Aamir Lal
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Phuong Thi Hoang
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Eui-Joon Kil
- Department of Plant Medicals, Andong National University, Andong, South Korea
| | - Sukchan Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Giuseppe Parrella
- Institute for Sustainable Plant Protection, National Research Council (IPSP-CNR), Portici, Italy
- *Correspondence: Giuseppe Parrella,
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