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Peterson A, Kishchenko O, Zhou Y, Vasylenko M, Giritch A, Sun J, Borisjuk N, Kuchuk M. Robust Agrobacterium-Mediated Transient Expression in Two Duckweed Species (Lemnaceae) Directed by Non-replicating, Replicating, and Cell-to-Cell Spreading Vectors. Front Bioeng Biotechnol 2021; 9:5. [PMID: 34805101 PMCID: PMC8600122 DOI: 10.3389/fbioe.2021.761073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/21/2021] [Indexed: 11/13/2022] Open
Abstract
Plant-based transient expression systems have recognized potential for use as rapid and cost-effective alternatives to expression systems based on bacteria, yeast, insect, or mammalian cells. The free-floating aquatic plants of the Lemnaceae family (duckweed) have compact architecture and can be vegetatively propagated on low-cost nutrient solutions in aseptic conditions. These features provide an economically feasible opportunity for duckweed-based production of high-value products via transient expression of recombinant products in fully contained, controlled, aseptic and bio-safe conditions in accordance with the requirements for pharmaceutical manufacturing and environmental biosafety. Here, we demonstrated Agrobacterium-mediated high-yield transient expression of a reporter green fluorescent protein using deconstructed vectors based on potato virus X and sweet potato leaf curl virus, as well as conventional binary vectors, in two representatives of the Lemnaceae (Spirodela polyrhiza and Landoltia punctata). Aseptically cultivated duckweed populations yielded reporter protein accumulation of >1 mg/g fresh biomass, when the protein was expressed from a deconstructed potato virus X-based vector, which is capable of replication and cell-to-cell movement of the replicons in duckweed. The expression efficiency demonstrated here places duckweed among the most efficient host organisms for plant-based transient expression systems, with the additional benefits of easy scale-up and full containment.
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Affiliation(s)
- Anton Peterson
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, Jiangsu Collaborative Innovation Centre of Regional Modern Agriculture and Environmental Protection, School of Life Sciences, Huaiyin Normal University, Huai'an, China.,Institute of Cell Biology and Genetic Engineering, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Olena Kishchenko
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, Jiangsu Collaborative Innovation Centre of Regional Modern Agriculture and Environmental Protection, School of Life Sciences, Huaiyin Normal University, Huai'an, China.,Institute of Cell Biology and Genetic Engineering, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Yuzhen Zhou
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, Jiangsu Collaborative Innovation Centre of Regional Modern Agriculture and Environmental Protection, School of Life Sciences, Huaiyin Normal University, Huai'an, China
| | - Maksym Vasylenko
- Institute of Cell Biology and Genetic Engineering, National Academy of Science of Ukraine, Kyiv, Ukraine
| | | | - Jian Sun
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, China
| | - Nikolai Borisjuk
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, Jiangsu Collaborative Innovation Centre of Regional Modern Agriculture and Environmental Protection, School of Life Sciences, Huaiyin Normal University, Huai'an, China
| | - Mykola Kuchuk
- Institute of Cell Biology and Genetic Engineering, National Academy of Science of Ukraine, Kyiv, Ukraine
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Construction of Infectious Clones of Begomoviruses: Strategies, Techniques and Applications. BIOLOGY 2021; 10:biology10070604. [PMID: 34209952 PMCID: PMC8301103 DOI: 10.3390/biology10070604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/21/2021] [Accepted: 06/24/2021] [Indexed: 11/24/2022]
Abstract
Simple Summary Begomovirus has a wide host range and threatens a significant amount of economic damage to many important crops such as tomatoes, beans, cassava, squash and cotton. There are many efforts directed at controlling this disease including the use of insecticides to control the insect vector as well as screening the resistant varieties. The use of synthetic virus or infectious clones approaches has allowed plant virologists to characterize and exploit the genome virus at the molecular and biological levels. By exploiting the DNA of the virus using the infectious clones strategy, the viral genome can be manipulated at specific regions to study functional genes for host–virus interactions. Thus, this review will provide an overview of the strategy to construct infectious clones of Begomovirus. The significance of established infectious clones in Begomovirus study will also be discussed. Abstract Begomovirus has become a potential threat to the agriculture sector. It causes significant losses to several economically important crops. Given this considerable loss, the development of tools to study viral genomes and function is needed. Infectious clones approaches and applications have allowed the direct exploitation of virus genomes. Infectious clones of DNA viruses are the critical instrument for functional characterization of the notable and newly discovered virus. Understanding of structure and composition of viruses has contributed to the evolution of molecular plant pathology. Therefore, this review provides extensive guidelines on the strategy to construct infectious clones of Begomovirus. Also, this technique’s impacts and benefits in controlling and understanding the Begomovirus infection will be discussed.
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Yu Y, Wang X, Sun H, Liang Q, Wang W, Zhang C, Bian X, Cao Q, Li Q, Xie Y, Ma D, Li Z, Sun J. Improving CRISPR-Cas-mediated RNA targeting and gene editing using SPLCV replicon-based expression vectors in Nicotiana benthamiana. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:1993-1995. [PMID: 32289196 PMCID: PMC7539982 DOI: 10.1111/pbi.13384] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 02/27/2020] [Accepted: 03/30/2020] [Indexed: 05/28/2023]
Affiliation(s)
- Yicheng Yu
- Jiangsu Key Laboratory of Phylogenomics and Comparative GenomicsSchool of Life SciencesJiangsu Normal UniversityXuzhouJiangsuChina
| | - Xiao Wang
- Jiangsu Key Laboratory of Phylogenomics and Comparative GenomicsSchool of Life SciencesJiangsu Normal UniversityXuzhouJiangsuChina
| | - Houjun Sun
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai DistrictXuzhouJiangsuChina
| | - Qiang Liang
- Jiangsu Key Laboratory of Phylogenomics and Comparative GenomicsSchool of Life SciencesJiangsu Normal UniversityXuzhouJiangsuChina
| | - Weichi Wang
- Jiangsu Key Laboratory of Phylogenomics and Comparative GenomicsSchool of Life SciencesJiangsu Normal UniversityXuzhouJiangsuChina
| | - Chengling Zhang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai DistrictXuzhouJiangsuChina
| | - Xiaofeng Bian
- Institute of Food CropsProvincial Key Laboratory of AgrobiologyJiangsu Academy of Agricultural SciencesNanjingJiangsuChina
| | - Qinghe Cao
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai DistrictXuzhouJiangsuChina
| | - Qiang Li
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai DistrictXuzhouJiangsuChina
| | - Yiping Xie
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai DistrictXuzhouJiangsuChina
| | - Daifu Ma
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai DistrictXuzhouJiangsuChina
| | - Zongyun Li
- Jiangsu Key Laboratory of Phylogenomics and Comparative GenomicsSchool of Life SciencesJiangsu Normal UniversityXuzhouJiangsuChina
| | - Jian Sun
- Jiangsu Key Laboratory of Phylogenomics and Comparative GenomicsSchool of Life SciencesJiangsu Normal UniversityXuzhouJiangsuChina
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Liu Q, Wang Y, Zhang Z, Lv H, Qiao Q, Qin Y, Zhang D, Tian Y, Wang S, Li J. Diversity of Sweepoviruses Infecting Sweet Potato in China. PLANT DISEASE 2017; 101:2098-2103. [PMID: 30677378 DOI: 10.1094/pdis-04-17-0524-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sweepoviruses (a group of begomoviruses that infect plants in the family Convolvulaceae) have monopartite genomes that consist of a circular, single-stranded DNA molecule. Seventy-three complete genomic sequences of sweepoviruses were characterized from the sweet potato samples collected in China. Eight sweepovirus species, including two novel species with proposed names of Sweet potato leaf curl China virus 2 and Sweet potato leaf curl Sichuan virus 2, were identified among these samples. One species, Sweet potato leaf curl Canary virus, was first identified in China. Among the 13 identified strains of Chinese sweepoviruses, 4 were newly discovered. Sweet potato leaf curl virus had the highest frequency (53.4%) of occurrence in the sweet potato samples from China. The similarities among the 73 sweepovirus genomic sequences were between 77.6 and 100.0%. Multiple recombination events were identified, and 16 recombinant sequences were determined. Recombination was observed between different species and between different strains of the same species. Recombination breakpoints were mainly localized on the intergenic region and in three open reading frames (AC1, AV1, and AV2). This study is the first comprehensive report on the genetic diversity of sweepoviruses in China.
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Affiliation(s)
- Qili Liu
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, P. R. China; College of Plant Protection, China Agricultural University, Beijing 100193; and College of Resources & Environmental Science, Henan Institute of Science and Technology, Xinxiang, P. R. China
| | - Yongjiang Wang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Zhenchen Zhang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Hui Lv
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Qi Qiao
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Yanhong Qin
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Desheng Zhang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Yuting Tian
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Shuang Wang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences; and IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture, Zhengzhou 450002, P. R. China
| | - Jianqiang Li
- College of Plant Protection, China Agricultural University, Beijing
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Bi H, Fan W, Zhang P. C4 Protein of Sweet Potato Leaf Curl Virus Regulates Brassinosteroid Signaling Pathway through Interaction with AtBIN2 and Affects Male Fertility in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2017; 8:1689. [PMID: 29021807 PMCID: PMC5623726 DOI: 10.3389/fpls.2017.01689] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/14/2017] [Indexed: 05/21/2023]
Abstract
Sweepoviruses have been identified globally and cause substantial yield losses and cultivar decline in sweet potato. This study aimed to investigate the interaction between sweepovirus and plant host by analyzing the function of the viral protein C4 of Sweet potato leaf curl virus-Jiangsu (SPLCV-JS), a sweepovirus cloned from diseased sweet potato plants in East China. Ectopic expression of the C4 in Arabidopsis altered plant development drastically with phenotypic changes including leaf curling, seedling twisting, deformation of floral tissues and reduction of pollen fertility, and seed number. Using bimolecular fluorescence complementation analysis, this study demonstrated that the SPLCV-JS C4 protein interacted with brassinosteroid-insensitive 2 (AtBIN2) in the plasma membrane of Nicotiana benthamiana cells. The C4 AtBIN2 interaction was further confirmed by yeast two-hybrid assays. This interaction led to the re-localization of AtBIN2-interacting proteins AtBES1/AtBZR1 into the nucleus which altered the expression of brassinosteroid (BR)-response genes, resulting in the activation of BR-signaling pathway. The interaction of SPLCV-JS C4 and AtBIN2 also led to the down-regulated expression of key genes involved in anther and pollen development, including SPROROCYTELESS/NOZZLE, DEFECTIVE IN TAPEL DEVELOPMENT AND FUNCTION 1, and ABORTED MICROSPORES, which caused abnormal tapetal development, followed by defective exine pattern formation of microspores and pollen release. Consequently, male fertility in the C4 transgenic Arabidopsis was reduced. The present study illustrated how the sweepovirus C4 protein functioned in host cells and affected male fertility by interacting with the key components of BR-signaling pathway.
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Affiliation(s)
- Huiping Bi
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Weijuan Fan
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
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Cuellar WJ, Galvez M, Fuentes S, Tugume J, Kreuze J. Synergistic interactions of begomoviruses with Sweet potato chlorotic stunt virus (genus Crinivirus) in sweet potato (Ipomoea batatas L.). MOLECULAR PLANT PATHOLOGY 2015; 16:459-71. [PMID: 25187172 PMCID: PMC6638456 DOI: 10.1111/mpp.12200] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Three hundred and ninety-four sweet potato accessions from Latin America and East Africa were screened by polymerase chain reaction (PCR) for the presence of begomoviruses, and 46 were found to be positive. All were symptomless in sweet potato and generated leaf curling and/or chlorosis in Ipomoea setosa. The five most divergent isolates, based on complete genome sequences, were used to study interactions with Sweet potato chlorotic stunt virus (SPCSV), known to cause synergistic diseases with other viruses. Co-infections led to increased titres of begomoviruses and decreased titres of SPCSV in all cases, although the extent of the changes varied notably between begomovirus isolates. Symptoms of leaf curling only developed temporarily in combination with isolate StV1 and coincided with the presence of the highest begomovirus concentrations in the plant. Small interfering RNA (siRNA) sequence analysis revealed that co-infection of SPCSV with isolate StV1 led to relatively increased siRNA targeting of the central part of the SPCSV genome and a reduction in targeting of the genomic ends, but no changes to the targeting of StV1 relative to single infection of either virus. These changes were not observed in the interaction between SPCSV and the RNA virus Sweet potato feathery mottle virus (genus Potyvirus), implying specific effects of begomoviruses on RNA silencing of SPCSV in dually infected plants. Infection in RNase3-expressing transgenic plants showed that this protein was sufficient to mediate this synergistic interaction with DNA viruses, similar to RNA viruses, but exposed distinct effects on RNA silencing when RNase3 was expressed from its native virus, or constitutively from a transgene, despite a similar pathogenic outcome.
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Affiliation(s)
- Wilmer J Cuellar
- The Virology Laboratory, International Potato Center (CIP), Av. La Molina 1895, Lima 12, Lima, Peru
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Bi H, Zhang P. Agroinfection of sweet potato by vacuum infiltration of an infectious sweepovirus. Virol Sin 2014; 29:148-54. [PMID: 24903591 DOI: 10.1007/s12250-014-3430-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 05/04/2014] [Indexed: 10/25/2022] Open
Abstract
Sweepovirus is an important monopartite begomovirus that infects plants of the genus Ipomoea worldwide. Development of artificial infection methods for sweepovirus using agroinoculation is a highly efficient means of studying infectivity in sweet potato. Unlike other begomoviruses, it has proven difficult to infect sweet potato plants with sweepoviruses using infectious clones. A novel sweepovirus, called Sweet potato leaf curl virus-Jiangsu (SPLCV-JS), was recently identified in China. In addition, the infectivity of the SPLCV-JS clone has been demonstrated in Nicotiana benthamiana. Here we describe the agroinfection of the sweet potato cultivar Xushu 22 with the SPLCV-JS infectious clone using vacuum infiltration. Yellowing symptoms were observed in newly emerged leaves. Molecular analysis confirmed successful inoculation by the detection of viral DNA. A synergistic effect of SPLCV-JS and the heterologous betasatellite DNA-β of Tomato yellow leaf curl China virus isolate Y10 (TYLCCNV-Y10) on enhanced symptom severity and viral DNA accumulation was confirmed. The development of a routine agroinoculation system in sweet potato with SPLCV-JS using vacuum infiltration should facilitate the molecular study of sweepovirus in this host and permit the evaluation of virus resistance of sweet potato plants in breeding programs.
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Affiliation(s)
- Huiping Bi
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
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Complete genome sequence of a novel monopartite begomovirus infecting sweet potato in China. Arch Virol 2014; 159:1537-40. [PMID: 24378821 DOI: 10.1007/s00705-013-1958-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 11/20/2013] [Indexed: 10/25/2022]
Abstract
The complete genome sequence of a novel monopartite begomovirus, isolate G-YU-12-10, was obtained from sweet potato samples exhibiting severe leaf curl symptoms in Xinxiang, Henan Province, China. The genome sequence consisted of 2766 nucleotides and encoded two open reading frames (ORFs) (AV1 and AV2) in the viral-sense strand and four ORFs (AC1-AC4) in the complementary-sense strand. The genome of isolate G-YU-12-10 was closely related to other sweet-potato-infecting begomoviruses (sweepoviruses) and shared the highest nucleotide sequence identity (89.0 %) with sweet potato leaf curl China Sichuan virus (SPLCCSV, KC488316). Thus, the G-YU-12-10 isolate represents a novel species according to the demarcation criteria of species in the genus Begomovirus, for which the name Sweet potato leaf curl Henan virus (SPLCHnV) is proposed. Interspecific recombination analysis supported the recombination hypothesis, indicating that recombination with other begomoviruses had taken place within AC2 and AC3 ORFs of SPLCHnV and also in the non-coding intergenic region (IR).
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Liu Q, Zhang Z, Qiao Q, Qin Y, Zhang D, Tian Y, Wang S, Wang Y. Complete genome sequence of a novel monopartite begomovirus infecting sweet potato in China. Virus Genes 2013; 47:591-4. [PMID: 24057883 DOI: 10.1007/s11262-013-0982-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 09/12/2013] [Indexed: 12/01/2022]
Abstract
The complete genome sequence of a new monopartite begomovirus isolate SC-1 was obtained from sweet potato samples in Sichuan province, China. The viral genome consists of 2,764 nucleotides (nt) and encodes two open reading frames (ORFs) called AV1 and AV2 genes in the viral-sense strand and four ORFs (AC1-AC4) in the complementary-sense strand. Sequence comparisons revealed that it shared the highest level of nt sequence identity (81.2 %) with Sweet potato leaf curl Georgia virus (AF326775). Phylogenetic analysis showed that the SC-1 genome was in a separate clade from other 29 begomovirus isolates. Thus, the SC-1 isolate is a novel species according to the demarcation criteria of species in the genus Begomovirus, for which the name "Sweet potato leaf curl China Sichuan Virus" (SPLCCSV) is proposed. Recombination analysis suggests that SPLCCSV has sequences derived from recombination between Sweet potato leaf curl virus (SPLCV) isolate GZ01 (JX286653) and SPLCV isolate Merremia N4 (DQ644563).
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Affiliation(s)
- Qili Liu
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, 100193, People's Republic of China
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Natural association of two different betasatellites with Sweet potato leaf curl virus in wild morning glory (Ipomoea purpurea) in India. Virus Genes 2013; 47:184-8. [PMID: 23529301 DOI: 10.1007/s11262-013-0901-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 03/11/2013] [Indexed: 10/27/2022]
Abstract
Wild morning glory (Ipomoea purpurea) was observed to be affected by leaf curl and yellow vein diseases during summer-rainy season of 2009 in New Delhi, India. The virus was experimentally transmitted through whitefly, Bemisia tabaci to I. purpurea that reproduced the two distinct symptoms. Sequence analysis of multiple full-length clones obtained through rolling circle amplification from the leaf curl and yellow vein samples showed 91.8-95.3% sequence identity with Sweet potato leaf curl virus (SPLCV) and the isolates were phylogenetically distinct from those reported from Brazil, China, Japan and USA. Interestingly, two different betasatellites, croton yellow vein mosaic betasatellite and papaya leaf curl betasatellite were found with SPLCV in leaf curl and yellow vein diseases of I. purpurea, respectively. This study is the first report of occurrence of SPLCV in wild morning glory in India. SPLCV was known to infect other species of morning glory; our study revealed that I. purpurea, a new species of morning glory was a natural host of SPLCV. To date, betasatellite associated with SPLCV in Ipomoea spp. is not known. Our study provides evidence of natural association of two different betasatellites with SPLCV in leaf curl and yellow vein diseases of I. purpurea.
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