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Dhobale KV, Sahoo L. Identification of mungbean yellow mosaic India virus and susceptibility-related metabolites in the apoplast of mung bean leaves. PLANT CELL REPORTS 2024; 43:173. [PMID: 38877163 DOI: 10.1007/s00299-024-03247-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 06/16/2024]
Abstract
KEY MESSAGE The investigation of MYMIV-infected mung bean leaf apoplast revealed viral genome presence, increased EVs secretion, and altered stress-related metabolite composition, providing comprehensive insights into plant-virus interactions. The apoplast, an extracellular space around plant cells, plays a vital role in plant-microbe interactions, influencing signaling, defense, and nutrient transport. While the involvement of apoplast and extracellular vesicles (EVs) in RNA virus infection is documented, the role of the apoplast in plant DNA viruses remains unclear. This study explores the apoplast's role in mungbean yellow mosaic India virus (MYMIV) infection. Our findings demonstrate the presence of MYMIV genomic components in apoplastic fluid, suggesting potential begomovirus cell-to-cell movement via the apoplast. Moreover, MYMIV infection induces increased EVs secretion into the apoplast. NMR-based metabolomics reveals altered metabolic profiles in both apoplast and symplast in response to MYMIV infection, highlighting key metabolites associated with stress and defense mechanisms. The data show an elevation of α- and β-glucose in both apoplast and symplast, suggesting a shift in glucose utilization. Interestingly, this increase in glucose does not contribute to the synthesis of phenolic compounds, potentially influencing the susceptibility of mung bean to MYMIV. Fructose levels increase in the symplast, while apoplastic sucrose levels rise significantly. Symplastic aspartate levels increase, while proline exhibits elevated concentration in the apoplast and reduced concentration in the cytosol, suggesting a role in triggering a hypersensitive response. These findings underscore the critical role of the apoplast in begomovirus infection, providing insights for targeted viral disease management strategies.
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Affiliation(s)
- Kiran Vilas Dhobale
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Lingaraj Sahoo
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
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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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4
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Cao X, Tang L, Song J. Circular Single-Stranded DNA: Discovery, Biological Effects, and Applications. ACS Synth Biol 2024; 13:1038-1058. [PMID: 38501391 DOI: 10.1021/acssynbio.4c00040] [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: 03/20/2024]
Abstract
The field of nucleic acid therapeutics has witnessed a significant surge in recent times, as evidenced by the increasing number of approved genetic drugs. However, current platform technologies containing plasmids, lipid nanoparticle-mRNAs, and adeno-associated virus vectors encounter various limitations and challenges. Thus, we are devoted to finding a novel nucleic acid vector and have directed our efforts toward investigating circular single-stranded DNA (CssDNA), an ancient form of nucleic acid. CssDNAs are ubiquitous, but generally ignored. Accumulating evidence suggests that CssDNAs possess exceptional properties as nucleic acid vectors, exhibiting great potential for clinical applications in genetic disorders, gene editing, and immune cell therapy. Here, we comprehensively review the discovery and biological effects of CssDNAs as well as their applications in the field of biomedical research for the first time. Undoubtedly, as an ancient form of DNA, CssDNA holds immense potential and promises novel insights for biomedical research.
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Affiliation(s)
- Xisen Cao
- Institute of Nano Biomedicine and Engineering, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Linlin Tang
- Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - Jie Song
- Institute of Nano Biomedicine and Engineering, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
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Wang D, Yin Y, Zhang X, Ye J. An Interspecies Recombinant Sida Yellow Mosaic China Virus Isolate and Betasatellite Cause a Leaf Curl Disease in Tobacco in Hainan, China. PLANT DISEASE 2024; 108:877-886. [PMID: 37743589 DOI: 10.1094/pdis-07-23-1346-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: 09/26/2023]
Abstract
Tobacco (Nicotiana tabacum) is an herbaceous crop. Cigar tobacco, a group of tobacco cultivars, has recently been planted in a few provinces in China. Since its introduction, symptoms such as leaf curling and vein thickening have appeared. Here we report a begomovirus, Sida yellow mosaic China virus-Hainan isolate (designated SiYMCNV-HN), associated with the betasatellite (designated SiYMCNB-HN) as the causal agent of a leaf curl disease in cigar tobacco (N. tabacum cv. Haiyan101) in Hainan Province, China. Phylogenetic and recombination analyses indicate that SiYMCNV-HN is an interspecies recombinant with a SiYMCNV isolate as the major parent and a Sida yellow vein Vietnam virus isolate as the minor parent. Full-length infectious clones of SiYMCNV-HN and SiYMCNB-HN were generated, which were highly infectious and induced high pathogenicity through agroinfiltration in Nicotiana benthamiana and N. tabacum. This newly reported recombinant begomovirus poses potential threats to tobacco plantations in the region.
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Affiliation(s)
- Duan Wang
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuteng Yin
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuan Zhang
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jian Ye
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
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Schafleitner R, Chen-Yu L, Laenoi S, Shu-Mei H, Srimat S, Gi-An L, Chatchawankanphanich O, Dhillon NPS. Molecular markers associated with resistance to squash leaf curl China virus and tomato leaf curl New Delhi virus in tropical pumpkin (Cucurbita moschata Duchesne ex Poir.) breeding line AVPU1426. Sci Rep 2024; 14:6793. [PMID: 38514827 PMCID: PMC10957999 DOI: 10.1038/s41598-024-57348-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 03/18/2024] [Indexed: 03/23/2024] Open
Abstract
Virus diseases are a major production constraint for pumpkin. Recessive resistance to squash leaf curl China virus and tomato leaf curl New Delhi virus has been mapped in Cucurbita moschata (Duchesne ex Poir.) breeding line AVPU1426 to chromosomes 7 and 8, respectively. Molecular markers tightly associated with the resistance loci have been developed and were able to correctly predict resistance and susceptibility with an accuracy of 99% for squash leaf curl China virus resistance and 94.34% for tomato leaf curl New Delhi virus in F2 and back cross populations derived from the original resistance source AVPU1426. The markers associated with resistance are recommended for use in marker-assisted breeding.
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Affiliation(s)
| | - Lin Chen-Yu
- World Vegetable Center, 60 Yi-Min Liao, Shanhua, 74151, Tainan, Taiwan
| | - Suwannee Laenoi
- World Vegetable Center, East and Southeast Asia, Kasetsart University, Kamphaeng Saen, Nakhon Pathom, 73140, Thailand
| | - Huang Shu-Mei
- World Vegetable Center, 60 Yi-Min Liao, Shanhua, 74151, Tainan, Taiwan
| | - Supornpun Srimat
- World Vegetable Center, 60 Yi-Min Liao, Shanhua, 74151, Tainan, Taiwan
| | - Lee Gi-An
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 54874, Republic of Korea
| | - Orawan Chatchawankanphanich
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand
| | - Narinder P S Dhillon
- World Vegetable Center, East and Southeast Asia, Kasetsart University, Kamphaeng Saen, Nakhon Pathom, 73140, Thailand
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Wei S, Liu L, Chen G, Yang H, Huang L, Gong G, Luo P, Zhang M. Molecular evolution and phylogeographic analysis of wheat dwarf virus. Front Microbiol 2024; 15:1314526. [PMID: 38419641 PMCID: PMC10901289 DOI: 10.3389/fmicb.2024.1314526] [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: 10/10/2023] [Accepted: 01/23/2024] [Indexed: 03/02/2024] Open
Abstract
Wheat dwarf virus (WDV) has caused considerable economic loss in the global production of grain crops. Knowledge of the evolutionary biology and population history of the pathogen remain poorly understood. We performed molecular evolution and worldwide phylodynamic analyses of the virus based on the genes in the protein-coding region of the entire viral genome. Our results showed that host-driven and geography-driven adaptation are major factors that affects the evolution of WDV. Bayesian phylogenetic analysis estimates that the average WDV substitution rate was 4.240 × 10-4 substitutions/site/year (95% credibility interval, 2.828 × 10-4-5.723 × 10-4), and the evolutionary rates of genes encoding proteins with virion-sense transcripts and genes encoding proteins with complementary-sense transcripts were different. The positively selected sites were detected in only two genes encoding proteins with complementary-sense, and WDV-barley are subject to stronger purifying selection than WDV-wheat. The time since the most recent common WDV ancestor was 1746 (95% credibility interval, 1517-1893) CE. Further analyses identified that the WDV-barley population and WDV-wheat population experienced dramatic expansion-decline episodes, and the expansion time of the WDV-barley population was earlier than that of the WDV-wheat population. Our phylogeographic analysis showed that the WDV population originating in Iran was subsequently introduced to Europe, and then spread from Eastern Europe to China.
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Affiliation(s)
- Shiqing Wei
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Linwen Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Guoliang Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Hui Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Liang Huang
- State Key Laboratory for the Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - PeiGao Luo
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
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Kim JH, Yu J, Kim JY, Park YJ, Bae S, Kang KK, Jung YJ. Phenotypic characterization of pre-harvest sprouting resistance mutants generated by the CRISPR/Cas9-geminiviral replicon system in rice. BMB Rep 2024; 57:79-85. [PMID: 38303561 PMCID: PMC10910094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/02/2023] [Accepted: 12/03/2023] [Indexed: 02/03/2024] Open
Abstract
Pre-harvest sprouting is a critical phenomenon involving germination of seeds in the mother plant before harvest under relative humid conditions and reduced dormancy. In this paper, we generated HDR mutant lines with one region SNP (C/T) and an insertion of 6 bp (GGT/GGTGGCGGC) in OsERF1 genes for pre-harvest sprouting (PHS) resistance using CRISPR/Cas9 and a geminiviral replicon system. The incidence of HDR was 2.6% in transformed calli. T1 seeds were harvested from 12 HDR-induced calli and named ERF1-hdr line. Molecular stability, key agronomic properties, physiological properties, and biochemical properties of target genes in the ERF1-hdr line were investigated for three years. The ERF1-hdr line showed significantly enhanced seed dormancy and pre-harvest sprouting resistance. qRT-PCR analysis suggested that enhanced ABA signaling resulted in a stronger phenotype of PHS resistance. These results indicate that efficient HDR can be achieved through SNP/InDel replacement using a single and modular configuration applicable to different rice targets and other crops. This work demonstrates the potential to replace all genes with elite alleles within one generation and greatly expands our ability to improve agriculturally important traits. [BMB Reports 2024; 57(2): 79-85].
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Affiliation(s)
- Jong Hee Kim
- Division of Horticultural Biotechnology, School of Biotechnology, Hankyong National University, Anseong 17579, Korea
- Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea
| | - Jihyeon Yu
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Jin Young Kim
- Division of Horticultural Biotechnology, School of Biotechnology, Hankyong National University, Anseong 17579, Korea
| | - Yong Jin Park
- Department of Plant Resources, College of Industrial Sciences, Kongju National University, Yesan 32439, Korea
| | - Sangsu Bae
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Kwon Kyoo Kang
- Division of Horticultural Biotechnology, School of Biotechnology, Hankyong National University, Anseong 17579, Korea
- Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea
| | - Yu Jin Jung
- Division of Horticultural Biotechnology, School of Biotechnology, Hankyong National University, Anseong 17579, Korea
- Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea
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Ye X, Ding D, Chen Y, Liu C, Li Z, Lou B, Zhou Y. Identification of RNA silencing suppressor encoded by citrus chlorotic dwarf-associated virus. Front Microbiol 2024; 15:1328289. [PMID: 38333582 PMCID: PMC10850569 DOI: 10.3389/fmicb.2024.1328289] [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: 10/26/2023] [Accepted: 01/04/2024] [Indexed: 02/10/2024] Open
Abstract
Introduction Citrus chlorotic dwarf-associated virus (CCDaV) is an economically important citrus virus associated with leaf curling, deformation, and chlorosis found in China. Plants have evolved RNA silencing to defend against viral infections; however, the mechanism by which CCDaV suppresses RNA silencing in citrus remains unknown. Methods Six proteins encoded by CCDaV were ectopically expressed in Nicotiana benthamiana 16c using the pCHF3 vector to identify RNA-silencing suppression activities. Results V2 protein encoded by CCDaV suppressed local RNA silencing and systemic RNA silencing triggered by GFP RNA, but did not impede short-distance movement of the RNA silencing signal in N. benthamiana 16c. GFP fluorescence observations showed that the ability of V2 protein to suppress RNA silencing was weaker than tomato bushy stunt virus P19. Deletion analysis showed that the putative nuclear localization signal (NLS, 25-54 aa) was involved in the RNA silencing suppression activity of V2 protein. Furthermore, V2 protein cannot block dsRNA-triggered RNA silencing. The subcellular localization assay suggested that V2 protein was localized to nucleus of N. benthamiana. Conclusion Overall, the results of this study demonstrate that CCDaV-V2 acts as an activity of silencing suppression. This is the first reported RNA-silencing suppressor encoded by Citlodavirus and will be valuable in revealing the molecular mechanism of CCDaV infection.
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Affiliation(s)
- Xiao Ye
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City/Citrus Research Institute, Southwest University, Chongqing, China
| | - Dongdong Ding
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City/Citrus Research Institute, Southwest University, Chongqing, China
| | - Yuan Chen
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City/Citrus Research Institute, Southwest University, Chongqing, China
| | - Chuang Liu
- Lemon Industry Development Center, Anyue, Sichuan, China
| | - Zhongan Li
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City/Citrus Research Institute, Southwest University, Chongqing, China
| | - Binghai Lou
- Guangxi Citrus Breeding and Cultivation Research Center of Engineering Technology/Guangxi Academy of Specialty Crops, Guilin, Guangxi, China
| | - Yan Zhou
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City/Citrus Research Institute, Southwest University, Chongqing, China
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Han TT, Tang JX, Fang M, Zhang P, Han PY, Yin ZN, Ma Y, Zhang J, Lu QY. Two genes encoded by mulberry crinkle leaf virus (MCLV): The V4 gene enhances viral replication, and the V5 gene is needed for MCLV infection in Nicotiana benthamiana. Virus Res 2024; 339:199288. [PMID: 38043724 PMCID: PMC10751690 DOI: 10.1016/j.virusres.2023.199288] [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: 05/06/2023] [Revised: 11/21/2023] [Accepted: 11/26/2023] [Indexed: 12/05/2023]
Abstract
Mulberry crinkle leaf virus (MCLV) is a member of the genus Mulcrilevirus, family Geminiviridae. The expression and functions of the V4 and V5 genes encoded by the MCLV genome remain unknown. Here, we confirmed the expression of V4 and V5 by analyzing the V4 and V5 mRNAs and the promoter activity of individual ORFs upstream sequences. The functions of V4 and V5 were investigated by constructing Agrobacterium-mediated infectious clones of wild-type MCLV variant П (MCLV vII), MCLVwt and MCLV vП mutants, such as MCLVmV4 (start codon of V4 ORF mutated), MCLVdV4 (5'-end partial deletion of V4 ORF sequence) and MCLVmV5 (V5 ORF start codon mutated). Although MCLVwt, MCLVmV4, and MCLVdV4 could infect natural host mulberry and experimental tomato plants systematically, the replication of the MCLVmV4 and MCLVdV4 genomes was obviously reduced compared to MCLVwt in both mulberry and tomato plants. MCLV vП expressing V5 could infect Nicotiana benthamiana plants systematically, but MCLVmV5 could not, implying that V5 is needed for MCLV vП to infect N. benthamiana plants. Taken together, V4 is involved in replication of the MCLV genome in host plants, and V5 potentially might extend the host range. Our findings lay a foundation for in-depth insight into the functions of MCLV-encoded proteins and provide a novel perspective for the subsequent study of MCLV-host plant interactions.
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Affiliation(s)
- Tao-Tao Han
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Jia-Xuan Tang
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Miao Fang
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Peng Zhang
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Pei-Yu Han
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Zhen-Ni Yin
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Yu Ma
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
| | - Jian Zhang
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China; Key Laboratory of Genetic Improvement of Silkworm and Mulberry, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, Jiangsu 212100, China
| | - Quan-You Lu
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China; Key Laboratory of Genetic Improvement of Silkworm and Mulberry, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, Jiangsu 212100, China.
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11
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Nayaka SN, Mondal F, Ranjan JK, Roy A, Mandal B. Bottle gourd IC-0262269, a super-susceptible genotype to tomato leaf curl Palampur virus. 3 Biotech 2024; 14:8. [PMID: 38074288 PMCID: PMC10709538 DOI: 10.1007/s13205-023-03838-y] [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: 07/10/2023] [Accepted: 10/29/2023] [Indexed: 01/19/2024] Open
Abstract
While conducting field trial of 82 genotypes of bottle gourd at Delhi during 2020-2021, a particular genotype, IC-0262269 was found to be affected by chlorotic curly stunt disease (CCSD). The affected plants were severely stunted and bearing very small chlorotic and crinkle leaves. The disease incidence in the said genotype was as high as 80% among different replicated trial blocks. The application of PCR using a generic primers specific to begomoviruses, as well as species-specific PCR diagnostics to six tomato-infecting begomoviruses: tomato leaf curl New Delhi virus (ToLCNDV), tomato leaf curl Palampur virus (ToLCPalV), tomato leaf curl Joydebpur virus (ToLCJoV), tomato leaf curl Gujrat virus (ToLCGuV), tomato leaf curl Bangalore virus (ToLCBV), and chilli leaf curl virus (ChiLCV) showed that, only ToLCPalV could be detected in the genotype IC-0262269. Following, rolling circle amplification, cloning and sequencing of full-length DNA-A and DNA-B genome of an isolate BoG1-ND from the genotype IC-0262269 revealed association of ToLCPalV with the disease. The successful agro-infection of the cloned genome of BoG1-ND (DNA-A and DNA-B) in the plants of Nicotiana benthamiana and bottle gourd demonstrated that ToLCPalV is the causal begomovirus of CCSD. The study provides the first evidence of the natural occurrence of ToLCPalV in bottle gourd crop and also showed that the bottle gourd genotype IC-0262269 is super-susceptible to ToLCPalV. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03838-y.
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Affiliation(s)
- S. Naveen Nayaka
- Advanced Centre for Plant Virology, Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Firoz Mondal
- Advanced Centre for Plant Virology, Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Jeetendra Kumar Ranjan
- Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Anirban Roy
- Advanced Centre for Plant Virology, Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Bikash Mandal
- Advanced Centre for Plant Virology, Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi, India
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12
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Jammes M, Golyaev V, Fuentes A, Laboureau N, Urbino C, Plissonneau C, Peterschmitt M, Pooggin MM. Transcriptome and small RNAome profiling uncovers how a recombinant begomovirus evades RDRγ-mediated silencing of viral genes and outcompetes its parental virus in mixed infection. PLoS Pathog 2024; 20:e1011941. [PMID: 38215155 PMCID: PMC10810479 DOI: 10.1371/journal.ppat.1011941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 01/25/2024] [Accepted: 01/03/2024] [Indexed: 01/14/2024] Open
Abstract
Tomato yellow leaf curl virus (TYLCV, genus Begomovirus, family Geminiviridae) causes severe disease of cultivated tomatoes. Geminiviruses replicate circular single-stranded genomic DNA via rolling-circle and recombination-dependent mechanisms, frequently generating recombinants in mixed infections. Circular double-stranded intermediates of replication also serve as templates for Pol II bidirectional transcription. IS76, a recombinant derivative of TYLCV with a short sequence in the bidirectional promoter/origin-of-replication region acquired from a related begomovirus, outcompetes TYLCV in mixed infection and breaks disease resistance in tomato Ty-1 cultivars. Ty-1 encodes a γ-clade RNA-dependent RNA polymerase (RDRγ) implicated in Dicer-like (DCL)-mediated biogenesis of small interfering (si)RNAs directing gene silencing. Here, we profiled transcriptome and small RNAome of Ty-1 resistant and control susceptible plants infected with TYLCV, IS76 or their combination at early and late infection stages. We found that RDRγ boosts production rates of 21, 22 and 24 nt siRNAs from entire genomes of both viruses and modulates DCL activities in favour of 22 and 24 nt siRNAs. Compared to parental TYLCV, IS76 undergoes faster transition to the infection stage favouring rightward transcription of silencing suppressor and coat protein genes, thereby evading RDRγ activity and facilitating its DNA accumulation in both single and mixed infections. In coinfected Ty-1 plants, IS76 efficiently competes for host replication and transcription machineries, thereby impairing TYLCV replication and transcription and forcing its elimination associated with further increased siRNA production. RDRγ is constitutively overexpressed in Ty-1 plants, which correlates with begomovirus resistance, while siRNA-generating DCLs (DCL2b/d, DCL3, DCL4) and genes implicated in siRNA amplification (α-clade RDR1) and function (Argonaute2) are upregulated to similar levels in TYLCV- and IS76-infected susceptible plants. Collectively, IS76 recombination facilitates replication and promotes expression of silencing suppressor and coat proteins, which allows the recombinant virus to evade the negative impact of RDRγ-boosted production of viral siRNAs directing transcriptional and posttranscriptional silencing.
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Affiliation(s)
- Margaux Jammes
- PHIM Plant Health Institute, University Montpellier, CIRAD, INRAE, IRD, Institute Agro, Montpellier, France
| | - Victor Golyaev
- PHIM Plant Health Institute, University Montpellier, CIRAD, INRAE, IRD, Institute Agro, Montpellier, France
| | | | - Nathalie Laboureau
- PHIM Plant Health Institute, University Montpellier, CIRAD, INRAE, IRD, Institute Agro, Montpellier, France
| | - Cica Urbino
- PHIM Plant Health Institute, University Montpellier, CIRAD, INRAE, IRD, Institute Agro, Montpellier, France
| | | | - Michel Peterschmitt
- PHIM Plant Health Institute, University Montpellier, CIRAD, INRAE, IRD, Institute Agro, Montpellier, France
| | - Mikhail M. Pooggin
- PHIM Plant Health Institute, University Montpellier, CIRAD, INRAE, IRD, Institute Agro, Montpellier, France
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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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14
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Iqbal Z, Shafiq M, Briddon RW. Cotton leaf curl Multan betasatellite impaired ToLCNDV ability to maintain cotton leaf curl Multan alphasatellite. BRAZ J BIOL 2024; 84:e260922. [DOI: 10.1590/1519-6984.260922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 05/13/2022] [Indexed: 11/21/2022] Open
Abstract
Abstract Alphasatellites (family Alphasatellitidae) are circular, single-stranded (ss) DNA molecules of ~1350 nucleotide in size that have been characterized in both the Old and New Worlds. Alphasatellites have inherent ability to self-replicate, which is accomplished by a single protein, replication-associated protein (Rep). Although the precise function of alphasatellite is yet unknown, and these consider dispensable for infectivity, however, their Rep protein functions as a suppressor of host defence. While alphasatellites are most frequently associated with begomoviruses, particularly with monopartite than bipartite begomoviruses, they have recently been found associated with mastreviruses. The in planta maintenance of alphasatellites by helper geminivirus is still an enigma, with no available study on the topic. This study aimed to investigate whether a widely distributed bipartite begomovirus, tomato leaf curl New Delhi virus (ToLCNDV), can maintain cotton leaf curl Multan alphasatellite (CLCuMuA) in the presence or absence of cotton leaf curl Multan betasatellite (CLCuMuB). The findings of this study demonstrated that ToLCNDV or its DNA A could maintain CLCuMuA in Nicotiana benthamiana plants. However, the presence of CLCuMuB interferes with the maintenance of CLCuMuA, and mutations in the CP of ToLCNDV further reduces it. Our study highlighted that the maintenance of alphasatellites is impaired in the presence of a betasatellite by ToLCNDV. Further investigation is needed to unravel all the interactions between a helper virus and an alphasatellites.
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Affiliation(s)
- Z. Iqbal
- National Institute for Biotechnology and Genetic Engineering, Pakistan; King Faisal University, Saudi Arabia
| | - M. Shafiq
- National Institute for Biotechnology and Genetic Engineering, Pakistan; University of Sialkot, Pakistan
| | - R. W. Briddon
- National Institute for Biotechnology and Genetic Engineering, Pakistan
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15
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Ascencio-Ibáñez JT, Dallas MM, Hanley-Bowdoin L. Begomovirus Inoculation in Arabidopsis and Cassava. Methods Mol Biol 2024; 2724:71-79. [PMID: 37987899 DOI: 10.1007/978-1-0716-3485-1_6] [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
The use of infectious clones to inoculate plant viruses allows for controlled studies that lead to a better understanding of plant-virus interactions. The main methods used for laboratory inoculation of geminiviruses are agroinoculation and biolistics. We describe how to successfully inoculate geminiviruses, focusing on Arabidopsis as a model plant and cassava as a crop.
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Affiliation(s)
- José T Ascencio-Ibáñez
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, USA.
| | - Mary M Dallas
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, USA
| | - Linda Hanley-Bowdoin
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, USA
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16
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Romero-Rodríguez B, Petek M, Jiao C, Križnik M, Zagorščak M, Fei Z, Bejarano ER, Gruden K, Castillo AG. Transcriptional and epigenetic changes during tomato yellow leaf curl virus infection in tomato. BMC PLANT BIOLOGY 2023; 23:651. [PMID: 38110861 PMCID: PMC10726652 DOI: 10.1186/s12870-023-04534-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 10/17/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND Geminiviruses are DNA plant viruses that cause highly damaging diseases affecting crops worldwide. During the infection, geminiviruses hijack cellular processes, suppress plant defenses, and cause a massive reprogramming of the infected cells leading to major changes in the whole plant homeostasis. The advances in sequencing technologies allow the simultaneous analysis of multiple aspects of viral infection at a large scale, generating new insights into the molecular mechanisms underlying plant-virus interactions. However, an integrative study of the changes in the host transcriptome, small RNA profile and methylome during a geminivirus infection has not been performed yet. Using a time-scale approach, we aim to decipher the gene regulation in tomato in response to the infection with the geminivirus, tomato yellow leaf curl virus (TYLCV). RESULTS We showed that tomato undergoes substantial transcriptional and post-transcriptional changes upon TYLCV infection and identified the main altered regulatory pathways. Interestingly, although the principal plant defense-related processes, gene silencing and the immune response were induced, this cannot prevent the establishment of the infection. Moreover, we identified extra- and intracellular immune receptors as targets for the deregulated microRNAs (miRNAs) and established a network for those that also produced phased secondary small interfering RNAs (phasiRNAs). On the other hand, there were no significant genome-wide changes in tomato methylome at 14 days post infection, the time point at which the symptoms were general, and the amount of viral DNA had reached its maximum level, but we were able to identify differentially methylated regions that could be involved in the transcriptional regulation of some of the differentially expressed genes. CONCLUSION We have conducted a comprehensive and reliable study on the changes at transcriptional, post-transcriptional and epigenetic levels in tomato throughout TYLCV infection. The generated genomic information is substantial for understanding the genetic, molecular and physiological changes caused by TYLCV infection in tomato.
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Affiliation(s)
- Beatriz Romero-Rodríguez
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM "La Mayora"), Universidad de Málaga-Consejo Superior de Investigaciones Científicas (UMA-CSIC), Boulevard Louis Pasteur, 49, Málaga, 29010, Spain
| | - Marko Petek
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna Pot 111, 1000, Ljubljana, Slovenia
| | - Chen Jiao
- Boyce Thompson Institute, Cornell University, Ithaca, NY, USA
- The Key Lab of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Maja Križnik
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna Pot 111, 1000, Ljubljana, Slovenia
| | - Maja Zagorščak
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna Pot 111, 1000, Ljubljana, Slovenia
| | - Zhangjun Fei
- Boyce Thompson Institute, Cornell University, Ithaca, NY, USA
| | - Eduardo R Bejarano
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM "La Mayora"), Universidad de Málaga-Consejo Superior de Investigaciones Científicas (UMA-CSIC), Boulevard Louis Pasteur, 49, Málaga, 29010, Spain
| | - Kristina Gruden
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna Pot 111, 1000, Ljubljana, Slovenia
| | - Araceli G Castillo
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" (IHSM "La Mayora"), Universidad de Málaga-Consejo Superior de Investigaciones Científicas (UMA-CSIC), Boulevard Louis Pasteur, 49, Málaga, 29010, Spain.
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Zhang W, Liu S, Xie G, Li X, Zhai Y, Lin W, Wu Z, Du Z, Zhang J. Size Restriction Is Required for Proper Functioning of a Bipartite Begomovirus AC4 Protein. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2023; 36:774-778. [PMID: 37665597 DOI: 10.1094/mpmi-02-23-0020-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: 09/05/2023]
Abstract
Many geminiviruses, including members of the genus Begomovirus, produce a protein known as C4 or AC4. Whereas C4/AC4 typically consists of more than 80 amino acid residues, a few are much shorter. The significance of these shorter C4/AC4 proteins in viral infection and why the virus maintains their abbreviated length is not yet understood. The AC4 of the begomovirus Tomato leaf curl Hsinchu virus contains only 65 amino acids, but it extends to 96 amino acids when the natural termination codon is replaced with a normal codon. We discovered that both interrupting and extending AC4 were harmful to tomato leaf curl Hsinchu virus (ToLCHsV). The extended AC4 (EAC4) also showed a reduced ability to promote the infection of the heterologous virus Potato virus X than the wild-type AC4. When the wild-type AC4 was fused with yellow fluorescent protein (AC4-YFP), it was predominantly found in chloroplasts, whereas EAC4-YFP was mainly localized to the cell periphery. These results suggest that ToLCHsV's AC4 protein is important for viral infection, and the virus may benefit from the abbreviated length, because it may lead to chloroplast localization. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Wenwen Zhang
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shunmin Liu
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Citrus Research Institute, Zhejiang Academy of Agricultural Sciences, Taizhou 318020, China
| | - Guohui Xie
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiuyu Li
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yingying Zhai
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wenzhong Lin
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zujian Wu
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhenguo Du
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jie Zhang
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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18
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Iqbal Z, Shafiq M, Sattar MN, Ali I, Khurshid M, Farooq U, Munir M. Genetic Diversity, Evolutionary Dynamics, and Ongoing Spread of Pedilanthus Leaf Curl Virus. Viruses 2023; 15:2358. [PMID: 38140599 PMCID: PMC10747432 DOI: 10.3390/v15122358] [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: 10/28/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Pedilanthus leaf curl virus (PeLCV) is a monopartite begomovirus (family Geminiviridae) discovered just a few decades ago. Since then, it has become a widely encountered virus, with reports from ca. 25 plant species across Pakistan and India, indicative of its notable evolutionary success. Viruses mutate at such a swift rate that their ecological and evolutionary behaviors are inextricably linked, and all of these behaviors are imprinted on their genomes as genetic diversity. So, all these imprints can be mapped by computational methods. This study was designed to map the sequence variation dynamics, genetic heterogeneity, regional diversity, phylogeny, and recombination events imprinted on the PeLCV genome. Phylogenetic and network analysis grouped the full-length genome sequences of 52 PeLCV isolates into 7 major clades, displaying some regional delineation but lacking host-specific demarcation. The progenitor of PeLCV was found to have originated in Multan, Pakistan, in 1977, from where it spread concurrently to India and various regions of Pakistan. A high proportion of recombination events, distributed unevenly throughout the genome and involving both inter- and intraspecies recombinants, were inferred. The findings of this study highlight that the PeLCV population is expanding under a high degree of genetic diversity (π = 0.073%), a high rate of mean nucleotide substitution (1.54 × 10-3), demographic selection, and a high rate of recombination. This sets PeLCV apart as a distinctive begomovirus among other begomoviruses. These factors could further exacerbate the PeLCV divergence and adaptation to new hosts. The insights of this study that pinpoint the emergence of PeLCV are outlined.
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Affiliation(s)
- Zafar Iqbal
- Central Laboratories, King Faisal University, Al-Ahsa P.O. Box 55110, Saudi Arabia;
| | - Muhammad Shafiq
- Department of Biotechnology, University of Management and Technology, Sialkot Campus, Sialkot P.O. Box 51340, Pakistan;
| | | | - Irfan Ali
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad P.O. Box 38000, Pakistan;
| | - Muhammad Khurshid
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore P.O. Box 54590, Pakistan;
| | - Umer Farooq
- Department of Biotechnology, University of Sialkot, Sialkot P.O. Box 51340, Pakistan;
| | - Muhammad Munir
- Date Palm Research Center of Excellence, King Faisal University, Al-Ahsa P.O. Box 31982, Saudi Arabia;
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19
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Mei Y, Cai L, Wang Y, Li F, Yang X, Yang J, Zhou X. Molecular characterization and pathogenicity of an infectious clone of tomato leaf curl New Delhi virus isolate infecting Cucumis melo. STRESS BIOLOGY 2023; 3:51. [PMID: 37994930 PMCID: PMC10667179 DOI: 10.1007/s44154-023-00128-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 10/22/2023] [Indexed: 11/24/2023]
Abstract
Tomato leaf curl New Delhi virus (ToLCNDV) is a member of the genus Begomovirus, and causes devastating disease in the world. In recent years, ToLCNDV was rapidly spreading in China and induces severe economic losses in agriculture. In this study, we sequenced and characterized the complete genome of ToLCNDV isolates from melon plants showing leaf curling and stunting symptoms in Jiangsu Province of China. We constructed a full-length infectious cDNA clone of ToLCNDV, which could induce systemic infection with typical symptoms in Nicotiana benthamiana, Citrullus melo, and Citrullus lanatus plants through agrobacterium-mediated inoculation. Further experimental evidence demonstrated that the virions produced in plants infected with the infectious clone of ToLCNDV are biologically active and sap-transmissible. We also evaluated the resistance of commercial melon cultivars to ToLCNDV and found all testing melon cultivars were susceptible to ToLCNDV. Collectively, the reverse genetic system developed herein will facilitate further research on biological functions of proteins encoded by ToLCNDV and plant-ToLCNDV interactions, which might provide new insights into breeding resistance germplasm in crops.
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Affiliation(s)
- Yuzhen Mei
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Lingmin Cai
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China
| | - Yaqin Wang
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Fangfang Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Xiuling Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Jinghua Yang
- Laboratory of Germplasm Innovation and Molecular Breeding, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.
- Yazhou Bay Science and Technology City, Hainan Institute, Zhejiang University, Sanya, 572025, China.
| | - Xueping Zhou
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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20
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Wang Z, Castillo-González CM, Zhao C, Tong CY, Li C, Zhong S, Liu Z, Xie K, Zhu J, Wu Z, Peng X, Jacob Y, Michaels SD, Jacobsen SE, Zhang X. H3.1K27me1 loss confers Arabidopsis resistance to Geminivirus by sequestering DNA repair proteins onto host genome. Nat Commun 2023; 14:7484. [PMID: 37980416 PMCID: PMC10657422 DOI: 10.1038/s41467-023-43311-1] [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: 10/05/2022] [Accepted: 11/06/2023] [Indexed: 11/20/2023] Open
Abstract
The H3 methyltransferases ATXR5 and ATXR6 deposit H3.1K27me1 to heterochromatin to prevent genomic instability and transposon re-activation. Here, we report that atxr5 atxr6 mutants display robust resistance to Geminivirus. The viral resistance is correlated with activation of DNA repair pathways, but not with transposon re-activation or heterochromatin amplification. We identify RAD51 and RPA1A as partners of virus-encoded Rep protein. The two DNA repair proteins show increased binding to heterochromatic regions and defense-related genes in atxr5 atxr6 vs wild-type plants. Consequently, the proteins have reduced binding to viral DNA in the mutant, thus hampering viral amplification. Additionally, RAD51 recruitment to the host genome arise via BRCA1, HOP2, and CYCB1;1, and this recruitment is essential for viral resistance in atxr5 atxr6. Thus, Geminiviruses adapt to healthy plants by hijacking DNA repair pathways, whereas the unstable genome, triggered by reduced H3.1K27me1, could retain DNA repairing proteins to suppress viral amplification in atxr5 atxr6.
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Affiliation(s)
- Zhen Wang
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
- Molecular and Environmental Plant Sciences, Texas A&M University, College Station, TX, 77843, USA
| | | | - Changjiang Zhao
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Chun-Yip Tong
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Changhao Li
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Songxiao Zhong
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Zhiyang Liu
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Kaili Xie
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Jiaying Zhu
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Zhongshou Wu
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Xu Peng
- Department of Molecular Physiology, College of Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Yannick Jacob
- Department of Molecular, Cellular & Developmental Biology, Yale University, New Haven, CT, 06511, USA
| | - Scott D Michaels
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Steven E Jacobsen
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Xiuren Zhang
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA.
- Molecular and Environmental Plant Sciences, Texas A&M University, College Station, TX, 77843, USA.
- Department of Biology, Texas A&M University, College Station, TX, 77843, USA.
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21
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Rosemarie Q, Sugden B. Five families of diverse DNA viruses comprehensively restructure the nucleus. PLoS Biol 2023; 21:e3002347. [PMID: 37930945 PMCID: PMC10627436 DOI: 10.1371/journal.pbio.3002347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023] Open
Abstract
Many viruses have evolved ways to restructure their host cell's nucleus profoundly and unexpectedly upon infection. In particular, DNA viruses that need to commandeer their host's cellular synthetic functions to produce their progeny can induce the condensation and margination of host chromatin during productive infection, a phenomenon known as virus-induced reorganization of cellular chromatin (ROCC). These ROCC-inducing DNA viruses belong to 5 families (herpesviruses, baculoviruses, adenoviruses, parvoviruses, and geminiviruses) that infect a wide range of hosts and are important for human and ecosystem health, as well as for biotechnology. Although the study of virus-induced ROCC is in its infancy, investigations are already raising important questions, such as why only some DNA viruses that replicate their genomes in the nucleus elicit ROCC. Studying the shared and distinct properties of ROCC-inducing viruses will provide valuable insights into viral reorganization of host chromatin that could have implications for future therapies that target the viral life cycle.
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Affiliation(s)
- Quincy Rosemarie
- Department of Oncology, McArdle Laboratory for Cancer Research, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Bill Sugden
- Department of Oncology, McArdle Laboratory for Cancer Research, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
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22
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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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23
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Bonnamy M, Blanc S, Michalakis Y. Replication mechanisms of circular ssDNA plant viruses and their potential implication in viral gene expression regulation. mBio 2023; 14:e0169223. [PMID: 37695133 PMCID: PMC10653810 DOI: 10.1128/mbio.01692-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023] Open
Abstract
The replication of members of the two circular single-stranded DNA (ssDNA) virus families Geminiviridae and Nanoviridae, the only ssDNA viruses infecting plants, is believed to be processed by rolling-circle replication (RCR) and recombination-dependent replication (RDR) mechanisms. RCR is a ubiquitous replication mode for circular ssDNA viruses and involves a virus-encoded Replication-associated protein (Rep) which fulfills multiple functions in the replication mechanism. Two key genomic elements have been identified for RCR in Geminiviridae and Nanoviridae: (i) short iterative sequences called iterons which determine the specific recognition of the viral DNA by the Rep and (ii) a sequence enabling the formation of a stem-loop structure which contains a conserved motif and constitutes the origin of replication. In addition, studies in Geminiviridae provided evidence for a second replication mode, RDR, which has also been documented in some double-stranded DNA viruses. Here, we provide a synthesis of the current understanding of the two presumed replication modes of Geminiviridae and Nanoviridae, and we identify knowledge gaps and discuss the possibility that these replication mechanisms could regulate viral gene expression through modulation of gene copy number.
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Affiliation(s)
- Mélia Bonnamy
- PHIM, Univ Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France
- MIVEGEC, CNRS, IRD, Univ Montpellier, Montpellier, France
| | - Stéphane Blanc
- PHIM, Univ Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France
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24
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Naveed H, Islam W, Jafir M, Andoh V, Chen L, Chen K. A Review of Interactions between Plants and Whitefly-Transmitted Begomoviruses. PLANTS (BASEL, SWITZERLAND) 2023; 12:3677. [PMID: 37960034 PMCID: PMC10648457 DOI: 10.3390/plants12213677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/22/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023]
Abstract
The transmission of plant viruses from infected to healthy host plants is a process in which insects play a major role, using various transmission strategies. Environmental factors have an impact on the transmission of viruses and the subsequent development of infections or diseases. When viruses are successful, plant virus diseases can reach epidemic proportions. Many plants across different regions are vulnerable to viral infections transmitted by the whitefly vector. Begomoviruses, which are transmitted by whiteflies, represent a significant threat to agriculture worldwide. The review highlights the mechanisms of virus acquisition and transmission by whiteflies and explores the factors influencing these interactions. Understanding the impacts of these changes is crucial for managing the spread of pests and mitigating damage to crops. It underscores the need for continued research to elucidate the mechanisms driving plant-insect-virus interactions and to identify new approaches for sustainable pest management.
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Affiliation(s)
- Hassan Naveed
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China;
| | - Waqar Islam
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
| | - Muhammad Jafir
- Department of Ecology, School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China;
| | - Vivian Andoh
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China;
| | - Liang Chen
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China;
| | - Keping Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China;
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25
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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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26
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Rajabu CA, Dallas MM, Chiunga E, De León L, Ateka EM, Tairo F, Ndunguru J, Ascencio-Ibanez JT, Hanley-Bowdoin L. SEGS-1 a cassava genomic sequence increases the severity of African cassava mosaic virus infection in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2023; 14:1250105. [PMID: 37915512 PMCID: PMC10616593 DOI: 10.3389/fpls.2023.1250105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/04/2023] [Indexed: 11/03/2023]
Abstract
Cassava is a major crop in Sub-Saharan Africa, where it is grown primarily by smallholder farmers. Cassava production is constrained by Cassava mosaic disease (CMD), which is caused by a complex of cassava mosaic begomoviruses (CMBs). A previous study showed that SEGS-1 (sequences enhancing geminivirus symptoms), which occurs in the cassava genome and as episomes during viral infection, enhances CMD symptoms and breaks resistance in cassava. We report here that SEGS-1 also increases viral disease severity in Arabidopsis thaliana plants that are co-inoculated with African cassava mosaic virus (ACMV) and SEGS-1 sequences. Viral disease was also enhanced in Arabidopsis plants carrying a SEGS-1 transgene when inoculated with ACMV alone. Unlike cassava, no SEGS-1 episomal DNA was detected in the transgenic Arabidopsis plants during ACMV infection. Studies using Nicotiana tabacum suspension cells showed that co-transfection of SEGS-1 sequences with an ACMV replicon increases viral DNA accumulation in the absence of viral movement. Together, these results demonstrated that SEGS-1 can function in a heterologous host to increase disease severity. Moreover, SEGS-1 is active in a host genomic context, indicating that SEGS-1 episomes are not required for disease enhancement.
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Affiliation(s)
- Cyprian A. Rajabu
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
- Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Mary M. Dallas
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
| | - Evangelista Chiunga
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
- Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Leandro De León
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, United States
| | - Elijah M. Ateka
- Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Fred Tairo
- Tanzania Agricultural Research Institute-Mikocheni, Dar Es Salaam, Tanzania
| | - Joseph Ndunguru
- Tanzania Agricultural Research Institute-Mikocheni, Dar Es Salaam, Tanzania
| | - Jose T. Ascencio-Ibanez
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, United States
| | - Linda Hanley-Bowdoin
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
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27
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Nogueira AM, Barbosa TMC, Quadros AFF, Orílio AF, Bigão MCJ, Xavier CAD, Ferro CG, Zerbini FM. Specific Nucleotides in the Common Region of the Begomovirus Tomato Rugose Mosaic Virus (ToRMV) Are Responsible for the Negative Interference over Tomato Severe Rugose Virus (ToSRV) in Mixed Infection. Viruses 2023; 15:2074. [PMID: 37896851 PMCID: PMC10611410 DOI: 10.3390/v15102074] [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: 09/04/2023] [Revised: 10/08/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
Mixed infection between two or more begomoviruses is commonly found in tomato fields and can affect disease outcomes by increasing symptom severity and viral accumulation compared with single infection. Viruses that affect tomato include tomato severe rugose virus (ToSRV) and tomato rugose mosaic virus (ToRMV). Previous work showed that in mixed infection, ToRMV negatively affects the infectivity and accumulation of ToSRV. ToSRV and ToRMV share a high degree of sequence identity, including cis-elements in the common region (CR) and their specific recognition sites (iteron-related domain, IRD) within the Rep gene. Here, we investigated if divergent sites in the CR and IRD are involved in the interaction between these two begomoviruses. ToSRV clones were constructed containing the same nucleotides as ToRMV in the CR (ToSRV-A(ToR:CR)), IRD (ToSRV-A(ToR:IRD)) and in both regions (ToSRV-A(ToR:CR+IRD)). When plants were co-inoculated with ToRMV and ToSRV-A(ToR:IRD), the infectivity and accumulation of ToSRV were negatively affected. In mixed inoculation of ToRMV with ToSRV-A(ToR:CR), high infectivity of both viruses and high DNA accumulation of ToSRV-A(ToR:CR) were observed. A decrease in viral accumulation was observed in plants inoculated with ToSRV-A(ToR:CR+IRD). These results indicate that differences in the CR, but not the IRD, are responsible for the negative interference of ToRMV on ToSRV.
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Affiliation(s)
- Angélica M. Nogueira
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
- Departamento de Proteção Vegetal, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista (UNESP), Botucatu 18610-307, SP, Brazil
| | - Tarsiane M. C. Barbosa
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
- Departamento de Entomologia e Acarologia, ESALQ, Universidade de São Paulo, Piracicaba 13418-900, SP, Brazil
| | - Ayane F. F. Quadros
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Anelise F. Orílio
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Marcela C. J. Bigão
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - César A. D. Xavier
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA
| | - Camila G. Ferro
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
- Departamento de Fitopatologia e Nematologia, ESALQ, Universidade de São Paulo, Piracicaba 13418-900, SP, Brazil
| | - Francisco Murilo Zerbini
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil; (A.M.N.); (T.M.C.B.); (A.F.F.Q.); (A.F.O.); (M.C.J.B.); (C.A.D.X.); (C.G.F.)
- Instituto de Biotecnologia Aplicada à Agropecuária (BIOAGRO), Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
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28
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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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29
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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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30
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Wang Y, Hu T, He Y, Su C, Wang Z, Zhou X. N-terminal acetylation of the βC1 protein encoded by the betasatellite of tomato yellow leaf curl China virus is critical for its viral pathogenicity. Virology 2023; 586:1-11. [PMID: 37473501 DOI: 10.1016/j.virol.2023.07.003] [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: 05/15/2023] [Revised: 06/19/2023] [Accepted: 07/04/2023] [Indexed: 07/22/2023]
Abstract
N-terminal acetylation (N-acetylation) is one of the most common protein modifications and plays crucial roles in viability and stress responses in animals and plants. However, very little is known about N-acetylation of viral proteins. Here, we identified the Thr residue at position 2 (Thr-2) in the βC1 protein encoded by the betasatellite of tomato yellow leaf curl China virus (TYLCCNB-βC1) as a novel N-acetylation site. Furthermore, the effects of TYLCCNB-βC1 N-acetylation on its function as a pathogenicity factor were determined via N-acetylation mutants in Nicotiana benthamiana plants. We found that N-acetylation of TYLCCNB-βC1 is critical for its self-interaction in the nucleus and viral pathogenesis, and that removal of N-acetylation of TYLCCNB-βC1 attenuated tomato yellow leaf curl China virus-induced symptoms and led to accelerated degradation of TYLCCNB-βC1 through the ubiquitin-proteasome system. Our data reveal a protective effect of N-acetylation of TYLCCNB-βC1 on its pathogenesis and demonstrate an antagonistic crosstalk between N-acetylation and ubiquitination in this geminiviral protein.
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Affiliation(s)
- Yaqin Wang
- State Key Laboratory of Rice Biology and Breeding, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Tao Hu
- State Key Laboratory of Rice Biology and Breeding, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yuting He
- State Key Laboratory of Rice Biology and Breeding, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Chenlu Su
- State Key Laboratory of Rice Biology and Breeding, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Zhanqi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000, China.
| | - Xueping Zhou
- State Key Laboratory of Rice Biology and Breeding, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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31
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Kasi Viswanath K, Hamid A, Ateka E, Pappu HR. CRISPR/Cas, Multiomics, and RNA Interference in Virus Disease Management. PHYTOPATHOLOGY 2023; 113:1661-1676. [PMID: 37486077 DOI: 10.1094/phyto-01-23-0002-v] [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: 07/25/2023]
Abstract
Plant viruses infect a wide range of commercially important crop plants and cause significant crop production losses worldwide. Numerous alterations in plant physiology related to the reprogramming of gene expression may result from viral infections. Although conventional integrated pest management-based strategies have been effective in reducing the impact of several viral diseases, continued emergence of new viruses and strains, expanding host ranges, and emergence of resistance-breaking strains necessitate a sustained effort toward the development and application of new approaches for virus management that would complement existing tactics. RNA interference-based techniques, and more recently, clustered regularly interspaced short palindromic repeats (CRISPR)-based genome editing technologies have paved the way for precise targeting of viral transcripts and manipulation of viral genomes and host factors. In-depth knowledge of the molecular mechanisms underlying the development of disease would further expand the applicability of these recent methods. Advances in next-generation/high-throughput sequencing have made possible more intensive studies into host-virus interactions. Utilizing the omics data and its application has the potential to expedite fast-tracking traditional plant breeding methods, as well as applying modern molecular tools for trait enhancement, including virus resistance. Here, we summarize the recent developments in the CRISPR/Cas system, transcriptomics, endogenous RNA interference, and exogenous application of dsRNA in virus disease management.
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Affiliation(s)
| | - Aflaq Hamid
- Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A
| | - Elijah Ateka
- Department of Horticulture and Food Security, Jomo Kenyatta University of Agriculture and Technology, Juja, Kenya
| | - Hanu R Pappu
- Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A
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Zhao S, Gong P, Liu J, Liu H, Lozano-Durán R, Zhou X, Li F. Geminivirus C5 proteins mediate formation of virus complexes at plasmodesmata for viral intercellular movement. PLANT PHYSIOLOGY 2023; 193:322-338. [PMID: 37306279 DOI: 10.1093/plphys/kiad338] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 04/21/2023] [Accepted: 05/16/2023] [Indexed: 06/13/2023]
Abstract
Movement proteins (MPs) encoded by plant viruses deliver viral genomes to plasmodesmata (PD) to ensure intracellular and intercellular transport. However, how the MPs encoded by monopartite geminiviruses are targeted to PD is obscure. Here, we demonstrate that the C5 protein of tomato yellow leaf curl virus (TYLCV) anchors to PD during the viral infection following trafficking from the nucleus along microfilaments in Nicotiana benthamiana. C5 could move between cells and partially complement the traffic of a movement-deficient turnip mosaic virus (TuMV) mutant (TuMV-GFP-P3N-PIPO-m1) into adjacent cells. The TYLCV-C5 null mutant (TYLCV-mC5) attenuates viral pathogenicity and decreases viral DNA and protein accumulation, and ectopic overexpression of C5 enhances viral DNA accumulation. Interaction assays between TYLCV-C5 and the other eight viral proteins described in TYLCV reveal that C5 associates with C2 in the nucleus and with V2 in the cytoplasm and at PD. The V2 protein is mainly localized in the nucleus and cytoplasmic granules when expressed alone; in contrast, V2 forms small punctate granules at PD when co-expressed with C5 or in TYLCV-infected cells. The interaction of V2 and C5 also facilitates their nuclear export. Furthermore, C5-mediated PD localization of V2 is conserved in two other geminiviruses. Therefore, this study solves a long-sought-after functional connection between PD and the geminivirus movement and improves our understanding of geminivirus-encoded MPs and their potential cellular and molecular mechanisms.
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Affiliation(s)
- Siwen Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Pan Gong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jie Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hui Liu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Rosa Lozano-Durán
- Department of Plant Biochemistry, Centre for Plant Molecular Biology (ZMBP), Eberhard Karls University, Tübingen D-72076, Germany
| | - Xueping Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Fangfang Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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Fan Y, Zhong Y, Pan L, Wang X, Ding M, Liu S. A shift of vector specificity acquired by a begomovirus through natural homologous recombination. MOLECULAR PLANT PATHOLOGY 2023; 24:882-895. [PMID: 37191666 PMCID: PMC10346445 DOI: 10.1111/mpp.13351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 04/26/2023] [Accepted: 04/26/2023] [Indexed: 05/17/2023]
Abstract
Recombination is common in plant viruses such as geminiviruses, but the ecological and pathogenic consequences have been explored only in a few cases. Here, we found that a new begomovirus, tomato yellow leaf curl Shuangbai virus (TYLCSbV), probably originated from the recombination of Ageratum yellow vein China virus (AYVCNV) and tobacco curl shoot virus (TbCSV). Agrobacterium-mediated inoculation showed that TYLCSbV and AYVCNV have similar levels of infectivity on tomato and tobacco plants. However, the two viruses exhibit contrasting specificities for vector transmission, that is, TYLCSbV was efficiently transmitted by the whitefly Bemisia tabaci Mediterranean (MED) rather than by the whitefly B. tabaci Middle East-Asia Minor 1 (MEAM1), whereas AYVCNV was more efficiently transmitted by MEAM1. We also showed that the transmission efficiencies of TYLCSbV and AYVCNV are positively correlated with the accumulation of the viruses in whitefly whole bodies and organs/tissues. The key coat protein amino acids that determine their accumulation are between positions 147 and 256. Moreover, field surveys suggest that MED has displaced MEAM1 in some regions where TYLCSbV was collected. Viral competition assays indicated that TYLCSbV outcompeted AYVCNV when transmitted by MED, while the outcome was the opposite when transmitted by MEAM1. Our findings suggest that recombination has resulted in a shift of vector specificity that could provide TYLCSbV with a potential selective transmission advantage, and the population shift of whitefly cryptic species could have influenced virus evolution towards an extended trajectory of transmission.
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Affiliation(s)
- Yun‐Yun Fan
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect Sciences, Zhejiang UniversityHangzhouChina
| | - Yu‐Wei Zhong
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect Sciences, Zhejiang UniversityHangzhouChina
| | - Li‐Long Pan
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect Sciences, Zhejiang UniversityHangzhouChina
| | - Xiao‐Wei Wang
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect Sciences, Zhejiang UniversityHangzhouChina
| | - Ming Ding
- Biotechnology and Germplasm Resources InstituteYunnan Academy of Agricultural SciencesKunmingChina
| | - Shu‐Sheng Liu
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect Sciences, Zhejiang UniversityHangzhouChina
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Dhobale KV, Murugan B, Deb R, Kumar S, Sahoo L. Molecular Epidemiology of Begomoviruses Infecting Mungbean from Yellow Mosaic Disease Hotspot Regions of India. Appl Biochem Biotechnol 2023; 195:5158-5179. [PMID: 36853442 DOI: 10.1007/s12010-023-04402-3] [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] [Accepted: 02/17/2023] [Indexed: 03/01/2023]
Abstract
The major threat to mungbean (Vigna radiata L.) cultivation in the Indian subcontinent is yellow mosaic diseases (YMD), caused by Begomovirus containing bipartite genomes (DNA-A and DNA-B). In the current study, we address the epidemiology of begomoviruses infecting mungbean plants in three YMD hotspot regions of India. Full-length genomic components of the viruses from the symptomatic leaves were cloned by rolling circle amplification (RCA) and sequenced. Mungbean yellow mosaic virus (MYMV) was detected in Bihar and mungbean yellow mosaic India virus (MYMIV) in Assam and Orissa. Furthermore, we studied the population structure and genetic diversity of MYMV and MYMIV isolates of Vigna species reported to date from India. Interestingly, based on phylogenetics, we observed independent evolution of DNA-A and coevolution of DNA-B of MYMV and MYMIV. This finding is supported by the high mutation rate and recombination events in DNA-B, particularly in BV1 and BC1 genes over DNA-A, with high transition/transversion bias (R) for DNA-A over DNA-B. To investigate the effect of Begomovirus infection in plants, we constructed infectious clones (i.e. MYMV and MYMIV) and inoculated them to eight mungbean genotypes, cowpea (Vigna unguiculata L.) and tobacco (Nicotiana benthamiana) through agroinfiltration. The infected plants developed varying degrees of typical YMD symptoms. Based on the disease severity score and viral titre, mungbean genotypes were categorized as highly susceptible to MYMV (ML267) and MYMIV (K851) and immune to MYMV (PDM139, SML668) and MYMIV (Pusa Vishal). Conclusively, our findings may help prevent an epidemic of YMD in Vigna species and develop mungbean genotypes resistant to YMD via breeding programs.
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Affiliation(s)
- Kiran Vilas Dhobale
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Bharatheeswaran Murugan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Rishav Deb
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Sanjeev Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Lingaraj Sahoo
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India.
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Soler-Garzón A, Goldoff D, Thornton A, Swisher Grimm KD, Hart JP, Song Q, Strausbaugh CA, Miklas PN. A robust SNP-haplotype assay for Bct gene region conferring resistance to beet curly top virus in common bean ( Phaseolus vulgaris L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1215950. [PMID: 37521933 PMCID: PMC10382175 DOI: 10.3389/fpls.2023.1215950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 06/12/2023] [Indexed: 08/01/2023]
Abstract
Beet curly top virus (BCTV), which is synonymous with curly top virus (CTV), causes significant yield loss in common bean (snap and dry beans) cultivars and several other important crops. Common bean cultivars have been found to be resistant to CTV, but screening for resistance is challenging due to the cyclical nature of epidemics and spotty feeding by the leafhopper that vectors the virus. We used an SNP dataset for the Snap Bean Association Panel (SnAP) agro-inoculated with CTV-Logan (CA/Logan) strain to locate the Bct gene region to a 1.7-Mb interval on chromosome Pv07 using genome-wide association study (GWAS) analysis. Recombinant lines from the SnAP were used to further narrow the Bct region to a 58.0-kb interval. A missense SNP (S07_2970381) in candidate gene Phvul.007G036300 Exonuclease V (EXO5) was identified as the most likely causal mutation, and it was the most significant SNP detected by GWAS in a dry bean population (DBP) naturally infected by the CTV-Worland (Wor) strain. Tm-shift assay markers developed for SNP S07_2970381 and two linked SNPs, S07_2970276 and S07_2966197, were useful for tracking different origins of the Bct EXO5 candidate gene resistance to CTV in common bean. The three SNPs identified four haplotypes, with haplotype 3-1 (Haplo3-1) of Middle American origin associated with the highest levels of CTV resistance. This SNP-haplotype assay will enable breeders to track resistance sources and to develop cultivars with better CTV resistance.
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Affiliation(s)
- Alvaro Soler-Garzón
- Irrigated Agriculture Research and Extension Center, Washington State University, Prosser, WA, United States
| | - Deidrah Goldoff
- Global Pathology Support Platform, HM Clause Seed Company, Davis, CA, United States
| | - Alyson Thornton
- Global Pathology Support Platform, HM Clause Seed Company, Davis, CA, United States
| | - Kylie D. Swisher Grimm
- Temperate Tree Fruit and Vegetable Research Unit, United States Department of Agriculture Agricultural Research Service (USDA-ARS), Prosser, WA, United States
| | - John P. Hart
- Tropical Agriculture Research Station, United States Department of Agriculture Agricultural Research Service (USDA-ARS), Mayagüez, Puerto Rico
| | - Qijian Song
- Soybean Genomics and Improvement Laboratory, United States Department of Agriculture Agricultural Research Service (USDA-ARS), Beltsville, MD, United States
| | - Carl A. Strausbaugh
- Northwest Irrigation and Soils Research Laboratory, United States Department of Agriculture Agricultural Research Service (USDA-ARS), Kimberly, ID, United States
| | - Phillip N. Miklas
- Grain Legume Genetics and Physiology Research Unit, United States Department of Agriculture Agricultural Research Service (USDA-ARS), Prosser, WA, United States
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Namgial T, Singh AK, Singh NP, Francis A, Chattopadhyay D, Voloudakis A, Chakraborty S. Differential expression of genes during recovery of Nicotiana tabacum from tomato leaf curl Gujarat virus infection. PLANTA 2023; 258:37. [PMID: 37405593 PMCID: PMC10322791 DOI: 10.1007/s00425-023-04182-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 06/10/2023] [Indexed: 07/06/2023]
Abstract
MAIN CONCLUSION Nicotiana tabacum exhibits recovery response towards tomato leaf curl Gujarat virus. Transcriptome analysis revealed the differential expression of defense-related genes. Genes encoding for cysteine protease inhibitor, hormonal- and stress-related to DNA repair mechanism are found to be involved in the recovery process. Elucidating the role of host factors in response to viral infection is crucial in understanding the plant host-virus interaction. Begomovirus, a genus in the family Geminiviridae, is reported throughout the globe and is known to cause serious crop diseases. Tomato leaf curl Gujarat virus (ToLCGV) infection in Nicotiana tabacum resulted in initial symptom expression followed by a quick recovery in the systemic leaves. Transcriptome analysis using next-generation sequencing (NGS) revealed a large number of differentially expressed genes both in symptomatic as well as recovered leaves when compared to mock-inoculated plants. The virus infected N. tabacum results in alteration of various metabolic pathways, phytohormone signaling pathway, defense related protein, protease inhibitor, and DNA repair pathway. RT-qPCR results indicated that Germin-like protein subfamily T member 2 (NtGLPST), Cysteine protease inhibitor 1-like (NtCPI), Thaumatin-like protein (NtTLP), Kirola-like (NtKL), and Ethylene-responsive transcription factor ERF109-like (NtERTFL) were down-regulated in symptomatic leaves when compared to recovered leaves of ToLCGV-infected plants. In contrast, the Auxin-responsive protein SAUR71-like (NtARPSL) was found to be differentially down-regulated in recovered leaves when compared to symptomatic leaves and the mock-inoculated plants. Lastly, Histone 2X protein like (NtHH2L) gene was found to be down-regulated, whereas Uncharacterized (NtUNCD) was up-regulated in both symptomatic as well as recovered leaves compared to the mock-inoculated plants. Taken together, the present study suggests potential roles of the differentially expressed genes that might govern tobacco's susceptibility and/or recovery response towards ToLCGV infection.
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Affiliation(s)
- T Namgial
- Laboratory of Plant Breeding and Biometry, Department of Crop Science, Agricultural University of Athens, Athens, 11855, Greece
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - A K Singh
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - N P Singh
- Laboratory of Plant Molecular Biology, National Institute of Plant Genome Research, New Delhi, 110067, India
| | - A Francis
- Laboratory of Plant Molecular Biology, National Institute of Plant Genome Research, New Delhi, 110067, India
| | - D Chattopadhyay
- Laboratory of Plant Molecular Biology, National Institute of Plant Genome Research, New Delhi, 110067, India
| | - A Voloudakis
- Laboratory of Plant Breeding and Biometry, Department of Crop Science, Agricultural University of Athens, Athens, 11855, Greece.
| | - S Chakraborty
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
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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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Jeevalatha A, Siddappa S, Kumar R, Tiwari RK, Lal MK, Sharma S, Chakrabarti SK, Singh BP. RNA-seq analysis reveals an early defense response to tomato leaf curl New Delhi virus in potato cultivar Kufri Bahar. Funct Integr Genomics 2023; 23:215. [PMID: 37389664 DOI: 10.1007/s10142-023-01138-5] [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: 05/06/2023] [Revised: 06/06/2023] [Accepted: 06/15/2023] [Indexed: 07/01/2023]
Abstract
Potatoes in India are very susceptible to apical leaf curl disease, which causes severe symptoms and greater yield losses. Because the majority of potato cultivars are susceptible to the virus, it is crucial to discover sources of resistance and investigate the mechanism of resistance/susceptibility in potato cultivars. In this study, the gene expression profile of two potato cultivars, Kufri Bahar (resistant) and Kufri Pukhraj (susceptible), varying in their level of resistance to ToLCNDV, was analyzed using RNA-Seq. The Ion ProtonTM system was used to sequence eight RiboMinus RNA libraries from inoculated and uninoculated potato plants at 15 and 20 days after inoculation (DAI). The findings indicated that the majority of differentially expressed genes (DEGs) were cultivar-or time-specific. These DEGs included genes for proteins that interact with viruses, genes linked with the cell cycle, genes for proteins involved in defense, transcription and translation initiation factors, and plant hormone signaling pathway genes. Interestingly, defense responses were generated early in Kufri Bahar, at 15 DAI, which may have impeded the replication and spread of ToLCNDV. This research provides a genome-wide transcriptional analysis of two potato cultivars with variable levels of ToLCNDV resistance. At an early stage, we observed suppression of genes that interact with viral proteins, induction of genes associated with restriction of cell division, genes encoding defense proteins, AP2/ERF transcription factors, and altered expression of zinc finger protein genes, HSPs, JA, and SA pathway-related genes. Our findings add to a greater comprehension of the molecular basis of potato resistance to ToLCNDV and may aid in the development of more effective disease management techniques.
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Affiliation(s)
- Arjunan Jeevalatha
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India
- ICAR- Indian Institute of Spices Research, Kozhikode, 673 012, Kerala, India
| | - Sundaresha Siddappa
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India
| | - Ravinder Kumar
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India.
| | - Rahul Kumar Tiwari
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India.
| | - Milan Kumar Lal
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India
| | - Sanjeev Sharma
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India
| | | | - Bir Pal Singh
- ICAR- Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India
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Mastrochirico M, Spanò R, De Miccolis Angelini RM, Mascia T. Molecular Characterization of a Recombinant Isolate of Tomato Leaf Curl New Delhi Virus Associated with Severe Outbreaks in Zucchini Squash in Southern Italy. PLANTS (BASEL, SWITZERLAND) 2023; 12:2399. [PMID: 37446959 DOI: 10.3390/plants12132399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/07/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023]
Abstract
The molecular characterization of a tomato leaf curl New Delhi virus (ToLCNDV) isolate, denoted ToLCNDV-Le, is reported. The virus was associated with severe and recurrent outbreaks in protected crops of zucchini squash grown in the Province of Lecce (Apulia, southern Italy). The fully sequenced genome of ToLCNDV-Le consists of two genomic components named DNA-A and DNA-B of 2738 and 2683 nt in size, respectively. Like other ToLCNDV isolates, ToLCNDV-Le DNA-A contains the AV2 and AV1 open reading frames (ORFs) in the virion-sense orientation and five additional ORFs named AC1, AC2, AC3, AC4 and AC5 in the complementary-sense orientation. The DNA-B contains BV1 ORF in the virion-sense orientation and BC1 ORF in the complementary-sense orientation. No DNA betasatellites were found associated with ToLCNDV-Le in naturally infected samples. Phylogenetic analysis clustered ToLCNDV-Le with the ToLCNDV-ES strain of western Mediterranean Basin isolates. Consequently, the ToLCNDV-ES-[IT-Zu-Le18] name is proposed as the descriptor for ToLCNDV-Le. Using recombination detection program RDP4, one putative recombination breakpoint (Rbp) was identified close to nucleotide positions 2197-2727, covering approximately half of the AC1 region, including the AC4 ORF and the 3' UTR. RDP4 indicated the event represents an Rbp of an isolate similar to ToLCNDV [Pk-06] (Acc. No. EF620534) found in Luffa acutangula in Pakistan and identified as putative minor parent into the background of ToLCNDV [BG-Jes-Svr-05] (Acc. No. AJ875157), found in tomato in Bangladesh, and identified as putative major parent. To the best of our knowledge, this is the first report of a ToLCNDV-ES recombinant isolate in the AC1-AC4 region in Italy.
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Affiliation(s)
| | - Roberta Spanò
- Department of Soil, Plant and Food Sciences, University of Bari "Aldo Moro", 70126 Bari, Italy
| | | | - Tiziana Mascia
- Department of Soil, Plant and Food Sciences, University of Bari "Aldo Moro", 70126 Bari, Italy
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Liu H, Chang Z, Zhao S, Gong P, Zhang M, Lozano-Durán R, Yan H, Zhou X, Li F. Functional identification of a novel C7 protein of tomato yellow leaf curl virus. Virology 2023; 585:117-126. [PMID: 37331112 DOI: 10.1016/j.virol.2023.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/20/2023]
Abstract
Tomato yellow leaf curl virus (TYLCV) is a monopartite geminivirus, and one of the most devastating plant viruses in the world. TYLCV is traditionally known to encode six viral proteins in bidirectional and partially overlapping open reading frames (ORFs). However, recent studies have shown that TYLCV encodes additional small proteins with specific subcellular localizations and potential virulence functions. Here, a novel protein named C7, encoded by a newly-described ORF in the complementary strand, was identified as part of the TYLCV proteome using mass spectrometry. The C7 protein localized to the nucleus and cytoplasm, both in the absence and presence of the virus. C7 was found to interact with two other TYLCV-encoded proteins: with C2 in the nucleus, and with V2 in the cytoplasm, forming conspicuous granules. Mutation of C7 start codon ATG to ACG to block the translation of C7 delayed the onset of viral infection, and the mutant virus caused milder virus symptoms and less accumulations of viral DNAs and proteins. Using the potato virus X (PVX)-based recombinant vector, we found that ectopic overexpression of C7 resulted in more severe mosaic symptoms and promoted a higher accumulation of PVX-encoded coat protein in the late virus infection stage. In addition, C7 was also found to inhibit GFP-induced RNA silencing moderately. This study demonstrates that the novel C7 protein encoded by TYLCV is a pathogenicity factor and a weak RNA silencing suppressor, and that it plays a critical role during TYLCV infection.
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Affiliation(s)
- He Liu
- College of Plant Protection, Hebei Agricultural University, Baoding, Hebei, 071000, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Zhaoyang Chang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Siwen Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Pan Gong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Mingzhen Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Rosa Lozano-Durán
- Department of Plant Biochemistry, Centre for Plant Molecular Biology (ZMBP), Eberhard Karls University, D-72076 Tübingen, Germany
| | - Hongfei Yan
- College of Plant Protection, Hebei Agricultural University, Baoding, Hebei, 071000, China.
| | - Xueping Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China; State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
| | - Fangfang Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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Chang HH, Gustian D, Chang CJ, Jan FJ. Virus-virus interactions alter the mechanical transmissibility and host range of begomoviruses. FRONTIERS IN PLANT SCIENCE 2023; 14:1092998. [PMID: 37332697 PMCID: PMC10275492 DOI: 10.3389/fpls.2023.1092998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 05/05/2023] [Indexed: 06/20/2023]
Abstract
Introduction Begomoviruses are mainly transmitted by whiteflies. However, a few begomoviruses can be transmitted mechanically. Mechanical transmissibility affects begomoviral distribution in the field. Materials and methods In this study, two mechanically transmissible begomoviruses, tomato leaf curl New Delhi virus-oriental melon isolate (ToLCNDV-OM) and tomato yellow leaf curl Thailand virus (TYLCTHV), and two nonmechanically transmissible begomoviruses, ToLCNDV-cucumber isolate (ToLCNDV-CB) and tomato leaf curl Taiwan virus (ToLCTV), were used to study the effects of virus-virus interactions on mechanical transmissibility. Results Nicotiana benthamiana and host plants were coinoculated through mechanical transmission with inoculants derived from plants that were mix-infected or inoculants derived from individually infected plants, and the inoculants were mixed immediately before inoculation. Our results showed that ToLCNDV-CB was mechanically transmitted with ToLCNDV-OM to N. benthamiana, cucumber, and oriental melon, whereas ToLCTV was mechanically transmitted with TYLCTHV to N. benthamiana and tomato. For crossing host range inoculation, ToLCNDV-CB was mechanically transmitted with TYLCTHV to N. benthamiana and its nonhost tomato, while ToLCTV with ToLCNDV-OM was transmitted to N. benthamiana and its nonhost oriental melon. For sequential inoculation, ToLCNDV-CB and ToLCTV were mechanically transmitted to N. benthamiana plants that were either preinfected with ToLCNDV-OM or TYLCTHV. The results of fluorescence resonance energy transfer analyses showed that the nuclear shuttle protein of ToLCNDV-CB (CBNSP) and the coat protein of ToLCTV (TWCP) localized alone to the nucleus. When coexpressed with movement proteins of ToLCNDV-OM or TYLCTHV, CBNSP and TWCP relocalized to both the nucleus and the cellular periphery and interacted with movement proteins. Discussion Our findings indicated that virus-virus interactions in mixed infection circumstances could complement the mechanical transmissibility of nonmechanically transmissible begomoviruses and alter their host range. These findings provide new insight into complex virus-virus interactions and will help us to understand the begomoviral distribution and to reevaluate disease management strategies in the field.
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Affiliation(s)
- Ho-Hsiung Chang
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Deri Gustian
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Chung-Jan Chang
- Department of Plant Pathology, University of Georgia, Griffin, GA, United States
| | - Fuh-Jyh Jan
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
- Advanced Plant and Food Crop Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
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Dye AE, Muga B, Mwangi J, Hoyer JS, Ly V, Rosado Y, Sharpee W, Mware B, Wambugu M, Labadie P, Deppong D, Jackai L, Jacobson A, Kennedy G, Ateka E, Duffy S, Hanley-Bowdoin L, Carbone I, Ascencio-Ibáñez JT. Cassava begomovirus species diversity changes during plant vegetative cycles. Front Microbiol 2023; 14:1163566. [PMID: 37303798 PMCID: PMC10248227 DOI: 10.3389/fmicb.2023.1163566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/17/2023] [Indexed: 06/13/2023] Open
Abstract
Cassava is a root crop important for global food security and the third biggest source of calories on the African continent. Cassava production is threatened by Cassava mosaic disease (CMD), which is caused by a complex of single-stranded DNA viruses (family: Geminiviridae, genus: Begomovirus) that are transmitted by the sweet potato whitefly (Bemisia tabaci). Understanding the dynamics of different cassava mosaic begomovirus (CMB) species through time is important for contextualizing disease trends. Cassava plants with CMD symptoms were sampled in Lake Victoria and coastal regions of Kenya before transfer to a greenhouse setting and regular propagation. The field-collected and greenhouse samples were sequenced using Illumina short-read sequencing and analyzed on the Galaxy platform. In the field-collected samples, African cassava mosaic virus (ACMV), East African cassava mosaic virus (EACMV), East African cassava mosaic Kenya virus (EACMKV), and East African cassava mosaic virus-Uganda variant (EACMV-Ug) were detected in samples from the Lake Victoria region, while EACMV and East African mosaic Zanzibar virus (EACMZV) were found in the coastal region. Many of the field-collected samples had mixed infections of EACMV and another begomovirus. After 3 years of regrowth in the greenhouse, only EACMV-like viruses were detected in all samples. The results suggest that in these samples, EACMV becomes the dominant virus through vegetative propagation in a greenhouse. This differed from whitefly transmission results. Cassava plants were inoculated with ACMV and another EACMV-like virus, East African cassava mosaic Cameroon virus (EACMCV). Only ACMV was transmitted by whiteflies from these plants to recipient plants, as indicated by sequencing reads and copy number data. These results suggest that whitefly transmission and vegetative transmission lead to different outcomes for ACMV and EACMV-like viruses.
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Affiliation(s)
- Anna E. Dye
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
| | - Brenda Muga
- Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Jenniffer Mwangi
- Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - J. Steen Hoyer
- Department of Ecology, Evolution and Natural Resources, Rutgers University, New Brunswick, NJ, United States
| | - Vanessa Ly
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, United States
| | - Yamilex Rosado
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, United States
| | - William Sharpee
- International Livestock Research Institute (ILRI), Nairobi, Kenya
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, United States
| | - Benard Mware
- International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Mary Wambugu
- International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Paul Labadie
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, United States
| | - David Deppong
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
| | - Louis Jackai
- Department of Natural Resources and Environmental Design, North Carolina Agricultural and Technical State University, Greensboro, NC, United States
| | - Alana Jacobson
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, United States
| | - George Kennedy
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, United States
| | - Elijah Ateka
- Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Siobain Duffy
- Department of Ecology, Evolution and Natural Resources, Rutgers University, New Brunswick, NJ, United States
| | - Linda Hanley-Bowdoin
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
| | - Ignazio Carbone
- Center for Integrated Fungal Research, Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, United States
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43
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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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Ren R, Zheng L, Han J, Perdoncini Carvalho C, Miyashita S, Zhang D, Qu F. Intracellular bottlenecking permits no more than three tomato yellow leaf curl virus genomes to initiate replication in a single cell. PLoS Pathog 2023; 19:e1011365. [PMID: 37126519 PMCID: PMC10174518 DOI: 10.1371/journal.ppat.1011365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 05/11/2023] [Accepted: 04/17/2023] [Indexed: 05/02/2023] Open
Abstract
Viruses are constantly subject to natural selection to enrich beneficial mutations and weed out deleterious ones. However, it remains unresolved as to how the phenotypic gains or losses brought about by these mutations cause the viral genomes carrying the very mutations to become more or less numerous. Previous investigations by us and others suggest that viruses with plus strand (+) RNA genomes may compel such selection by bottlenecking the replicating genome copies in each cell to low single digits. Nevertheless, it is unclear if similarly stringent reproductive bottlenecks also occur in cells invaded by DNA viruses. Here we investigated whether tomato yellow leaf curl virus (TYLCV), a small virus with a single-stranded DNA genome, underwent population bottlenecking in cells of its host plants. We engineered a TYLCV genome to produce two replicons that express green fluorescent protein and mCherry, respectively, in a replication-dependent manner. We found that among the cells entered by both replicons, less than 65% replicated both, whereas at least 35% replicated either of them alone. Further probability computation concluded that replication in an average cell was unlikely to have been initiated with more than three replicon genome copies. Furthermore, sequential inoculations unveiled strong mutual exclusions of these two replicons at the intracellular level. In conclusion, the intracellular population of the small DNA virus TYLCV is actively bottlenecked, and such bottlenecking may be a virus-encoded, evolutionarily conserved trait that assures timely selection of new mutations emerging through error-prone replication.
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Affiliation(s)
- Ruifan Ren
- Longping Branch, College of Biology, Hunan University, Changsha, China
- Department of Plant Pathology, The Ohio State University, Wooster, Ohio, United States of America
- Hunan Plant Protection Institute, Changsha, China
| | - Limin Zheng
- Department of Plant Pathology, The Ohio State University, Wooster, Ohio, United States of America
| | - Junping Han
- Department of Plant Pathology, The Ohio State University, Wooster, Ohio, United States of America
| | | | - Shuhei Miyashita
- Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Deyong Zhang
- Longping Branch, College of Biology, Hunan University, Changsha, China
- Hunan Plant Protection Institute, Changsha, China
| | - Feng Qu
- Department of Plant Pathology, The Ohio State University, Wooster, Ohio, United States of America
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Nair A, Harshith CY, Narjala A, Shivaprasad PV. Begomoviral βC1 orchestrates organellar genomic instability to augment viral infection. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 114:934-950. [PMID: 36919198 DOI: 10.1111/tpj.16186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/04/2023] [Accepted: 03/10/2023] [Indexed: 05/27/2023]
Abstract
Chloroplast is the site for transforming light energy to chemical energy. It also acts as a production unit for a variety of defense-related molecules. These defense moieties are necessary to mount a successful counter defense against pathogens, including viruses. Previous studies indicated disruption of chloroplast homeostasis as a basic strategy of Begomovirus for its successful infection leading to the production of vein-clearing, mosaic, and chlorotic symptoms in infected plants. Although begomoviral pathogenicity determinant protein Beta C1 (βC1) was implicated for pathogenicity, the underlying mechanism was unclear. Here we show that, begomoviral βC1 directly interferes with the host plastid homeostasis. βC1 induced DPD1, an organelle-specific nuclease, implicated in nutrient salvage and senescence, as well as modulated the function of a major plastid genome maintainer protein RecA1, to subvert plastid genome. We show that βC1 was able to physically interact with bacterial RecA and its plant homolog RecA1, resulting in its altered activity. We observed that knocking-down DPD1 during virus infection significantly reduced virus-induced necrosis. These results indicate the presence of a strategy in which a viral protein alters host defense by targeting modulators of chloroplast DNA. We predict that the mechanism identified here might have similarities in other plant-pathogen interactions.
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Affiliation(s)
- Ashwin Nair
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK Campus, Bellary Road, Bangalore, 560065, India
- SASTRA University, Thirumalaisamudram, Thanjavur, 613401, India
| | - Chitthavalli Y Harshith
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK Campus, Bellary Road, Bangalore, 560065, India
| | - Anushree Narjala
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK Campus, Bellary Road, Bangalore, 560065, India
- SASTRA University, Thirumalaisamudram, Thanjavur, 613401, India
| | - Padubidri V Shivaprasad
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK Campus, Bellary Road, Bangalore, 560065, India
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Malavika M, Prakash V, Chakraborty S. Recovery from virus infection: plant's armory in action. PLANTA 2023; 257:103. [PMID: 37115475 DOI: 10.1007/s00425-023-04137-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 04/14/2023] [Indexed: 05/26/2023]
Abstract
MAIN CONCLUSION This review focuses on different factors involved in promoting symptom recovery in plants post-virus infection such as epigenetics, transcriptional reprogramming, phytohormones with an emphasis on RNA silencing as well as role of abiotic factors such as temperature on symptom recovery. Plants utilize several different strategies to defend themselves in the battle against invading viruses. Most of the viral proteins interact with plant proteins and interfere with molecular dynamics in a cell which eventually results in symptom development. This initial symptom development is countered by the plant utilizing various factors including the plant's adaptive immunity to develop a virus tolerant state. Infected plants can specifically target and impede the transcription of viral genes as well as degrade the viral transcripts to restrict their proliferation by the production of small-interfering RNA (siRNA) generated from the viral nucleic acid, known as virus-derived siRNA (vsiRNA). To further escalate the degradation of viral nucleic acid, secondary siRNAs are generated. The production of virus-activated siRNA (vasiRNA) from the host genome causes differential regulation of the host transcriptome which plays a major role in establishing a virus tolerant state within the infected plant. The systemic action of vsiRNAs, vasiRNA, and secondary siRNAs with the help of defense hormones like salicylic acid can curb viral proliferation, and thus the newly emerged leaves develop fewer symptoms, maintaining a state of tolerance.
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Affiliation(s)
- M Malavika
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Ved Prakash
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
- Department of Plant Pathology, Kansas State University, Manhattan, KS, 66506, USA
| | - Supriya Chakraborty
- Molecular Virology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
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Venkataravanappa V, Ashwathappa KV, Kallingappa P, Shridhar H, Hemachandra Reddy P, Reddy MK, Reddy CNL. Diversity and phylogeography of begomoviruses and DNA satellites associated with the leaf curl and mosaic disease complex of eggplant. Microb Pathog 2023; 180:106127. [PMID: 37119939 DOI: 10.1016/j.micpath.2023.106127] [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: 01/12/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/01/2023]
Abstract
Eggplant is one of the important vegetable crops grown across the world, and its production is threatened by both biotic and abiotic stresses. Diseases caused by viruses are becoming major limiting factors for its successful cultivation. A survey for begomovirus-like symptoms in 72 eggplant fields located in six different Indian states revealed a prevalence of disease ranging from 5.2 to 40.2%, and the symptoms recorded were mosaic, mottling, petiole bending, yellowing, and upward curling, vein thickening, and enation of the leaves, and stunting of plants. The causal agent associated with these plants was transmitted from infected leaf samples to healthy eggplant seedlings via grafting and whiteflies (Bemisia tabaci). The presence of begomovirus was confirmed in 72 infected eggplant samples collected from the surveyed fields exhibiting leaf curl and mosaic disease by PCR using begomovirus specifc primers (DNA-A componet), which resulted in an expected amplicon of 1.2 kb. The partial genome sequence obtained from amplified 1.2 kb from all samples indicated that they are closely related begomovirus species, tomato leaf Karnataka virus (ToLCKV, two samples), tomato leaf curl Palampur virus (ToLCPalV, fifty eggplant samples), and chilli leaf curl virus (ChLCuV, twenty samples). Based on the partial genome sequence analysis, fourteen representative samples were selected for full viral genome amplification by the rolling circle DNA amplification (RCA) technique. Analyses of fourteen eggplant isolates genome sequences using the Sequence Demarcation Tool (SDT) indicated that one isolate had the maximum nucleotide (nt) identity with ToLCKV and eight isolates with ToLCPalV. Whereas, four isolates four isolates (BLC1-CH, BLC2-CH, BLC3-CH, BLC4-CH) are showing nucleotide identity of less than 91% with chilli infecting viruses begomoviruses with chilli infecting begomoviruses and as per the guidelines given by the ICTV study group for the classification of begomoviruses these isolates are considered as one novel begomovirus species, for which name, Eggplant leaf curl Chhattisgarh virus (EgLCuChV) is proposed. For DNA-B component, seven eggplant isolates had the highest nt identity with ToLCPalV infecting other crops. Further, DNA satellites sequence analysis indicated that four betasatellites identified shared maximum nucleotide identity with the tomato leaf curl betasatellite and five alphasatellites shared maximum nucleotide identity with the ageratum enation alphasatellite. Recombination and GC plot analyses indicated that the bulk of begomovirus genome and associated satellites presumably originated from of previously known mono and bipartite begomoviruses and DNA satellites. To the best of our knowledge, this is India's first report of ToLCKV and a noval virus, eggplant leaf curl Chhattisgarh virus associated with eggplant leaf curl disease.
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Affiliation(s)
- V Venkataravanappa
- Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, 560089, Karnataka, India.
| | - K V Ashwathappa
- Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, 560089, Karnataka, India
| | | | - Hiremath Shridhar
- Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, GKVK, Bengaluru, 560 065, Karnataka, India
| | - P Hemachandra Reddy
- Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, 560089, Karnataka, India
| | - M Krishna Reddy
- Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, 560089, Karnataka, India
| | - C N Lakshminarayana Reddy
- Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, GKVK, Bengaluru, 560 065, Karnataka, India.
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Majumdar A, Sharma A, Belludi R. Natural and Engineered Resistance Mechanisms in Plants against Phytoviruses. Pathogens 2023; 12:pathogens12040619. [PMID: 37111505 PMCID: PMC10143959 DOI: 10.3390/pathogens12040619] [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: 03/09/2023] [Revised: 04/14/2023] [Accepted: 04/16/2023] [Indexed: 04/29/2023] Open
Abstract
Plant viruses, as obligate intracellular parasites, rely exclusively on host machinery to complete their life cycle. Whether a virus is pathogenic or not depends on the balance between the mechanisms used by both plants and viruses during the intense encounter. Antiviral defence mechanisms in plants can be of two types, i.e., natural resistance and engineered resistance. Innate immunity, RNA silencing, translational repression, autophagy-mediated degradation, and resistance to virus movement are the possible natural defence mechanisms against viruses in plants, whereas engineered resistance includes pathogen-derived resistance along with gene editing technologies. The incorporation of various resistance genes through breeding programmes, along with gene editing tools such as CRISPR/Cas technologies, holds great promise in developing virus-resistant plants. In this review, different resistance mechanisms against viruses in plants along with reported resistance genes in major vegetable crops are discussed.
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Affiliation(s)
- Anik Majumdar
- Department of Plant Pathology, College of Agriculture, Punjab Agricultural University, Ludhiana 141004, Punjab, India
| | - Abhishek Sharma
- Department of Vegetable Science, College of Horticulture and Forestry, Punjab Agricultural University, Ludhiana 141004, Punjab, India
| | - Rakesh Belludi
- Department of Plant Pathology, College of Agriculture, Punjab Agricultural University, Ludhiana 141004, Punjab, India
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Wang Y, Mei Y, Su C, Wang Z, Li F, Hu T, Wang Z, Liu S, Li F, Zhou X. GPIBase: A comprehensive resource for geminivirus-plant-insect research. MOLECULAR PLANT 2023; 16:647-649. [PMID: 36809879 DOI: 10.1016/j.molp.2023.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/07/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Affiliation(s)
- Yaqin Wang
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yang Mei
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Chenlu Su
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Zuoqi Wang
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Fangfang Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Tao Hu
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Zhanqi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou 313000, China
| | - Shusheng Liu
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Fei Li
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Xueping Zhou
- State Key Laboratory of Rice Biology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Al-Roshdi MR, Ammara U, Khan J, Al-Sadi AM, Shahid MS. Artificial microRNA-mediated resistance against Oman strain of tomato yellow leaf curl virus. FRONTIERS IN PLANT SCIENCE 2023; 14:1164921. [PMID: 37063229 PMCID: PMC10098008 DOI: 10.3389/fpls.2023.1164921] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
Tomato yellow leaf curl virus (TYLCV) is a global spreading begomovirus that is exerting a major restraint on global tomato production. In this transgenic approach, an RNA interference (RNAi)-based construct consisting of sequences of an artificial microRNA (amiRNA), a group of small RNA molecules necessary for plant cell development, signal transduction, and stimulus to biotic and abiotic disease was engineered targeting the AC1/Rep gene of the Oman strain of TYLCV-OM. The Rep-amiRNA constructs presented an effective approach in regulating the expression of the Rep gene against TYLCV as a silencing target to create transgenic Solanum lycopersicum L. plant tolerance against TYLCV infection. Molecular diagnosis by PCR followed by a Southern hybridization analysis were performed to confirm the effectiveness of agrobacterium-mediated transformation in T0/T1-transformed plants. A substantial decrease in virus replication was observed when T1 transgenic tomato plants were challenged with the TYLCV-OM infectious construct. Although natural resistance options against TYLCV infection are not accessible, the current study proposes that genetically transformed tomato plants expressing amiRNA could be a potential approach for engineering tolerance in plants against TYLCV infection and conceivably for the inhibition of viral diseases against different strains of whitefly-transmitted begomoviruses in Oman.
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