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Xiang S, Wang J, Wang X, Ma X, Peng H, Zhu X, Huang J, Ran M, Ma L, Sun X. A chitosan-coated lentinan-loaded calcium alginate hydrogel induces broad-spectrum resistance to plant viruses by activating Nicotiana benthamiana calmodulin-like (CML) protein 3. PLANT, CELL & ENVIRONMENT 2023; 46:3592-3610. [PMID: 37551976 DOI: 10.1111/pce.14681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/26/2023] [Accepted: 07/29/2023] [Indexed: 08/09/2023]
Abstract
Control of plant virus diseases largely depends on the induced plant defence achieved by the external application of synthetic chemical inducers with the ability to modify defence-signalling pathways. However, most of the molecular mechanisms underlying these chemical inducers remain unknown. Here, we developed a chitosan-coated lentinan-loaded hydrogel and discovered how it protects plants from different virus infections. The hydrogel was synthesized by coating chitosan on the surface of the calcium alginate-lentinan (LNT) hydrogel (SL-gel) to form a CSL-gel. CSL-gels exhibit the capacity to prolong the stable release of lentinan and promote Ca2+ release. Application of CSL-gels on the root of plants induces broad-spectrum resistance against plant viruses (TMV, TRV, PVX and TuMV). RNA-seq analysis identified that Nicotiana benthamiana calmodulin-like protein gene 3 (NbCML3) is upregulated by the sustained release of Ca2+ from the CSL-gel, and silencing and overexpression of NbCML alter the susceptibility and resistance of tobacco to TMV. Our findings provide evidence that this novel and synthetic CSL-gel strongly inhibits the infection of plant viruses by the sustainable release of LNT and Ca2+ . This study uncovers a novel mode of action by which CSL-gels trigger NbCML3 expression through the stable and sustained release of Ca2+ .
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Affiliation(s)
- Shunyu Xiang
- College of Plant Protection, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, China
| | - Jing Wang
- College of Plant Protection, Southwest University, Chongqing, China
| | - Xiaoyan Wang
- College of Plant Protection, Southwest University, Chongqing, China
| | - Xiaozhou Ma
- College of Plant Protection, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, China
| | - Haoran Peng
- College of Plant Protection, Southwest University, Chongqing, China
| | - Xin Zhu
- College of Plant Protection, Southwest University, Chongqing, China
| | - Jin Huang
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, China
| | - Mao Ran
- Chongqing Tobacco Science Research Institute, Chongqing, China
| | - Lisong Ma
- State Key Laboratory of North China Crop Improvement and Regulation, College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Xianchao Sun
- College of Plant Protection, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, China
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2
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Scholthof HB, Scholthof KBG. Plant virology: an RNA treasure trove. TRENDS IN PLANT SCIENCE 2023; 28:1277-1289. [PMID: 37495453 DOI: 10.1016/j.tplants.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/12/2023] [Accepted: 06/27/2023] [Indexed: 07/28/2023]
Abstract
Key principles pertaining to RNA biology not infrequently have their origins in plant virology. Examples have arisen from studies on viral RNA-intrinsic properties and the infection process from gene expression, replication, movement, and defense evasion to biotechnological applications. Since RNA is at the core of the central dogma in molecular biology, how plant virology assisted in the reinforcement or adaptations of this concept, while at other instances shook up elements of the doctrine, is discussed. Moreover, despite the negative effects of viral diseases in agriculture worldwide, plant viruses can be considered a scientific treasure trove. Today they remain tools of discovery for biotechnology, studying evolution, cell biology, and host-microbe interactions.
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Affiliation(s)
- Herman B Scholthof
- Department of Plant Pathology & Microbiology, Texas A&M University, College Station TX 77843, USA.
| | - Karen-Beth G Scholthof
- Department of Plant Pathology & Microbiology, Texas A&M University, College Station TX 77843, USA
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3
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Zheng K, Zhang R, Wan Q, Zhang G, Lu Y, Zheng H, Yan F, Peng J, Wu J. Pepper mild mottle virus can infect and traffick within Nicotiana benthamiana plants in non-virion forms. Virology 2023; 587:109881. [PMID: 37703796 DOI: 10.1016/j.virol.2023.109881] [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: 07/04/2023] [Revised: 08/28/2023] [Accepted: 09/05/2023] [Indexed: 09/15/2023]
Abstract
Virions are responsible for the long-distance transport of many viruses, such as Pepper mild mottle virus (PMMoV). Emerging evidence indicates viral traffic in the form of ribonucleoprotein complexes (RNP), yet comprehensive analysis is scarce. In this study, we inoculated plants with PMMoV-GFP, both with and without the coding sequence for the coat protein (CP). PMMoV-GFP was detected in systemic leaves, even in the absence of the CP, despite the presence of much smaller infection areas. Moreover, using leaf extracts from PMMoV-infected plants to perform a root-irrigation experiment, we confirmed that PMMoV can infect plants through root transmission. Diluting the leaf extracts significantly diminished infectivity, and attempts to compensate for the dilution of other components by adding virions above the original level proved ineffective. Our findings strongly indicate that PMMoV can infect and traffick within plants in non-virion forms. Future studies should aim to identify the specific forms involved.
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Affiliation(s)
- Kaiyue Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Ruihao Zhang
- Horticulture Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, Yunnan, China
| | - Qionglian Wan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China; School of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi, 653100, Yunnan, China
| | - Ge Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Yuwen Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Hongying Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Fei Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Jiejun Peng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China.
| | - Jian Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China.
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4
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Keldysh MA, Kuklina AG, Chervyakova ON, Tkachenko OB. Composition and Extent Adaptability of Fungal Pathogens and Viruses in Invasive Populations of Lupinus polyphyllus Lindl. (Fabaceae). RUSSIAN JOURNAL OF BIOLOGICAL INVASIONS 2023. [DOI: 10.1134/s2075111723010046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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5
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Tottey S, Shoji Y, Mark Jones R, Musiychuk K, Chichester JA, Miura K, Zhou L, Lee SM, Plieskatt J, Wu Y, Long CA, Streatfield SJ, Yusibov V. Engineering of a plant-produced virus-like particle to improve the display of the Plasmodium falciparum Pfs25 antigen and transmission-blocking activity of the vaccine candidate. Vaccine 2023; 41:938-944. [PMID: 36585278 PMCID: PMC9888754 DOI: 10.1016/j.vaccine.2022.12.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 12/04/2022] [Accepted: 12/19/2022] [Indexed: 12/29/2022]
Abstract
Malaria kills around 409,000 people a year, mostly children under the age of five. Malaria transmission-blocking vaccines work to reduce malaria prevalence in a community and have the potential to be part of a multifaceted approach required to eliminate the parasites causing the disease. Pfs25 is a leading malaria transmission-blocking antigen and has been successfully produced in a plant expression system as both a subunit vaccine and as a virus-like particle. This study demonstrates an improved version of the virus-like particle antigen display molecule by eliminating known protease sites from the prior A85 variant. This re-engineered molecule, termed B29, displays three times the number of Pfs25 antigens per virus-like particle compared to the original Pfs25 virus-like particle. An improved purification scheme was also developed, resulting in a substantially higher yield and improved purity. The molecule was evaluated in a mouse model and found to induce improved transmission-blocking activity at lower doses and longer durations than the original molecule.
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Affiliation(s)
- Stephen Tottey
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA
| | - Yoko Shoji
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA
| | - R Mark Jones
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA
| | - Konstantin Musiychuk
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA
| | - Jessica A Chichester
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA
| | - Kazutoyo Miura
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12735 Twinbrook Parkway, Rockville, MD 20852, USA
| | - Luwen Zhou
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12735 Twinbrook Parkway, Rockville, MD 20852, USA
| | - Shwu-Maan Lee
- PATH's Malaria Vaccine Initiative, Washington, DC 20001, USA
| | | | - Yimin Wu
- PATH's Malaria Vaccine Initiative, Washington, DC 20001, USA
| | - Carole A Long
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12735 Twinbrook Parkway, Rockville, MD 20852, USA
| | - Stephen J Streatfield
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA.
| | - Vidadi Yusibov
- Fraunhofer USA Center Mid-Atlantic, Biotechnology Division, 9 Innovation Way, Newark, DE 19711, USA
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THE ROLE OF BIOTIC FACTORS IN <i>LUPINUS POLYPHYLLUS </i>LINDL.(FABACEAE)INVASIVENESS LIMITATION. RUSSIAN JOURNAL OF BIOLOGICAL INVASIONS 2022. [DOI: 10.35885/1996-1499-15-4-10-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
The article presents experimental data on the species composition of fungal and viral pathogens in the conditions of the secondary range of Lupinus polyphyllus . Tobacco mosaic virus, Bean yellow mosaic virus, Bean common mosaic virus and Pea enation mosaic virus were diagnosed on Lupinus polyphyllus for the first time. The issues related to the peculiarities of the adaptability of viruses to invasive plant species are discussed. The preventive role of vectors ( Aphididae ) in the expansion of pathogens and the widening of the spectrum of host plants (susceptible species) is emphasized. Interaction with vectors, including their non-specific species, is one of the mechanisms of virus adaptability, their expansion into new regions and the formation of new pathosystems with invasive plant species. It is concluded that based on the analysis of trophic connections of vectors, it is possible to prognosticate the search for the most effective variants of harmful organisms for the biocontrol of L. polyphyllus .
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7
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Blaze a New Trail: Plant Virus Xylem Exploitation. Int J Mol Sci 2022; 23:ijms23158375. [PMID: 35955508 PMCID: PMC9368924 DOI: 10.3390/ijms23158375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 11/17/2022] Open
Abstract
Viruses are trailblazers in hijacking host systems for their own needs. Plant viruses have been shown to exploit alternative avenues of translocation within a host, including a challenging route through the xylem, to expand their niche and establish systemic spread, despite apparent host-imposed obstacles. Recent findings indicate that plant viruses from many families could successfully hack xylem cells in a broad range of plant hosts, including herbaceous and perennial woody plants. Similar to virus-related structures present in the phloem, virus particles and membrane-containing viral replication complexes are often observed in the xylem. Except for a few single-stranded DNA viruses in the family Geminiviridae and a negative-sense single-stranded RNA rhabdovirus, Lettuce necrotic yellows virus, the majority of the viruses that were detected in the xylem belong to the group of positive-sense RNA viruses. The diversity of the genome organization and virion morphology of those viruses indicates that xylem exploitation appears to be a widely adapted strategy for plant viruses. This review outlines the examples of the xylem-associated viruses and discusses factors that regulate virus inhabitation of the xylem as well as possible strategies of virus introduction into the xylem. In some cases, plant disease symptoms have been shown to be closely related to virus colonization of the xylem. Inhibiting viral xylem invasion could raise potential attractive approaches to manage virus diseases. Therefore, the identification of the host genes mediating virus interaction with the plant xylem tissue and understanding the underlying mechanisms call for more attention.
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Xia X, Shi B, Wang L, Liu Y, Zou Y, Zhou Y, Chen Y, Zheng M, Zhu Y, Duan J, Guo S, Jang HW, Miao Y, Fan K, Bai F, Tao W, Zhao Y, Yan Q, Cheng G, Liu H, Jiao Y, Liu S, Huang Y, Ling D, Kang W, Xue X, Cui D, Huang Y, Cui Z, Sun X, Qian Z, Gu Z, Han G, Yang Z, Leong DT, Wu A, Liu G, Qu X, Shen Y, Wang Q, Lowry GV, Wang E, Liang X, Gardea‐Torresdey J, Chen G, Parak WJ, Weiss PS, Zhang L, Stenzel MM, Fan C, Bush AI, Zhang G, Grof CPL, Wang X, Galbraith DW, Tang BZ, Offler CE, Patrick JW, Song C. From mouse to mouse‐ear cress: Nanomaterials as vehicles in plant biotechnology. EXPLORATION 2021. [DOI: 10.1002/exp.20210002] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xue Xia
- Henan‐Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences Henan University Kaifeng Henan China
- Henan Key Laboratory of Brain Targeted Bio‐nanomedicine, School of Life Sciences & School of Pharmacy Henan University Kaifeng Henan China
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
- School of Environmental and Life Sciences, College of Engineering, Science and Environment University of Newcastle Callaghan New South Wales Australia
| | - Bingyang Shi
- Henan‐Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences Henan University Kaifeng Henan China
- Henan Key Laboratory of Brain Targeted Bio‐nanomedicine, School of Life Sciences & School of Pharmacy Henan University Kaifeng Henan China
| | - Lei Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - Yang Liu
- Henan‐Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences Henan University Kaifeng Henan China
- Henan Key Laboratory of Brain Targeted Bio‐nanomedicine, School of Life Sciences & School of Pharmacy Henan University Kaifeng Henan China
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences Macquarie University Sydney New South Wales Australia
| | - Yan Zou
- Henan‐Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences Henan University Kaifeng Henan China
- Henan Key Laboratory of Brain Targeted Bio‐nanomedicine, School of Life Sciences & School of Pharmacy Henan University Kaifeng Henan China
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences Macquarie University Sydney New South Wales Australia
| | - Yun Zhou
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - Yu Chen
- Materdicine Lab, School of Life Sciences Shanghai University Shanghai China
| | - Meng Zheng
- Henan‐Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences Henan University Kaifeng Henan China
- Henan Key Laboratory of Brain Targeted Bio‐nanomedicine, School of Life Sciences & School of Pharmacy Henan University Kaifeng Henan China
| | - Yingfang Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - Jingjing Duan
- School of Energy and Power Engineering Nanjing University of Science and Technology Nanjing China
| | - Siyi Guo
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - Ho Won Jang
- Department of Material Science and Engineering, Research Institute of Advanced Materials Seoul National University Seoul Republic of Korea
| | - Yuchen Miao
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - Kelong Fan
- Engineering Laboratory for Nanozyme, Institute of Biophysics Chinese Academy of Sciences Beijing China
| | - Feng Bai
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High‐efficiency Display and Lighting Technology, School of Materials Science and Engineering, Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng Henan China
| | - Wei Tao
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
| | - Yong Zhao
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High‐efficiency Display and Lighting Technology, School of Materials Science and Engineering, Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng Henan China
| | - Qingyu Yan
- School of Materials Science and Engineering Nanyang Technological University Singapore Singapore
| | - Gang Cheng
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High‐efficiency Display and Lighting Technology, School of Materials Science and Engineering, Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng Henan China
| | - Huiyu Liu
- Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, State Key Laboratory of Organic‐Inorganic Composites, Bionanomaterials & Translational Engineering Laboratory, Beijing Laboratory of Biomedical Materials Beijing University of Chemical Technology Beijing China
| | - Yan Jiao
- Centre for Materials in Energy and Catalysis (CMEC), School of Chemical Engineering and Advanced Materials The University of Adelaide Adelaide South Australia Australia
| | - Shanhu Liu
- College of Chemistry and Chemical Engineering Henan University Kaifeng Henan China
| | - Yuanyu Huang
- Advanced Research Institute of Multidisciplinary Science, School of Life Science, Institute of Engineering Medicine, Key Laboratory of Molecular Medicine and Biotherapy Beijing Institute of Technology Beijing China
| | - Daishun Ling
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti‐Cancer Drug Research, Hangzhou Institute of Innovative Medicine Zhejiang University Hangzhou China
| | - Wenyi Kang
- Henan Key Laboratory of Brain Targeted Bio‐nanomedicine, School of Life Sciences & School of Pharmacy Henan University Kaifeng Henan China
| | - Xue Xue
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy Nankai University Tianjin China
| | - Daxiang Cui
- Institute of Nano Biomedicine and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Shanghai Engineering Research Center for Intelligent Diagnosis and Treatment Instrument, Department of Instrument Science & Engineering, School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China
| | - Yongwei Huang
- Laboratory for NanoMedical Photonics, School of Basic Medical Science Henan University Kaifeng Henan China
| | - Zongqiang Cui
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega‐Science Chinese Academy of Sciences Wuhan China
| | - Xun Sun
- College of Materials Science and Engineering Sichuan University Chengdu China
| | - Zhiyong Qian
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital Sichuan University Chengdu China
| | - Zhen Gu
- College of Pharmaceutical Sciences Zhejiang University Hangzhou China
| | - Gang Han
- Department of Biochemistry and Molecular Pharmacology University of Massachusetts Medical School Worcester Massachusetts USA
| | - Zhimou Yang
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences Nankai University Tianjin China
| | - David Tai Leong
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore Singapore
| | - Aiguo Wu
- Cixi Institute of Biomedical Engineering, International Cooperation Base of Biomedical Materials Technology and Application, CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Engineering Research Center for Biomedical Materials, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
| | - Gang Liu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine, School of Public Health Xiamen University Xiamen China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin China
| | - Youqing Shen
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Center for Bionanoengineering, and Department of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Qiangbin Wang
- CAS Key Laboratory of Nano‐Bio Interface, Division of Nanobiomedicine and i‐Lab, Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou China
| | - Gregory V. Lowry
- Department of Civil and Environmental Engineering and Center for Environmental Implications of Nano Technology (CEINT) Carnegie Mellon University Pittsburgh Pennsylvania USA
| | - Ertao Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China
| | - Xing‐Jie Liang
- Laboratory of Controllable Nanopharmaceuticals, Center for Excellence in Nanoscience and CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology Chinese Academy of Sciences Beijing China
| | - Jorge Gardea‐Torresdey
- Department of Chemistry and Biochemistry The University of Texas at El Paso El Paso Texas USA
| | - Guoping Chen
- Research Center for Functional Materials National Institute for Materials Science Tsukuba Ibaraki Japan
| | - Wolfgang J. Parak
- Institute of Nano Biomedicine and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Shanghai Engineering Research Center for Intelligent Diagnosis and Treatment Instrument, Department of Instrument Science & Engineering, School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China
- Fachbereich Physik, CHyN University of Hamburg Hamburg Germany
| | - Paul S. Weiss
- California NanoSystems Institute, Department of Chemistry and Biochemistry, Department of Bioengineering, and Department of Materials Science and Engineering University of California Los Angeles California USA
| | - Lixin Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - Martina M. Stenzel
- School of Chemistry University of New South Wales Sydney New South Wales Australia
| | - Chunhai Fan
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai China
| | - Ashley I. Bush
- The Florey Department of Neuroscience and Mental Health The University of Melbourne Melbourne Victoria Australia
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology Henan Academy of Agricultural Sciences Zhengzhou China
| | - Christopher P. L. Grof
- School of Environmental and Life Sciences, College of Engineering, Science and Environment University of Newcastle Callaghan New South Wales Australia
| | - Xuelu Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
| | - David W. Galbraith
- School of Plant Sciences and Bio5 Institute University of Arizona Tucson Arizona USA
| | - Ben Zhong Tang
- Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering The Chinese University of Hong Kong Shenzhen China
| | - Christina E. Offler
- School of Environmental and Life Sciences, College of Engineering, Science and Environment University of Newcastle Callaghan New South Wales Australia
| | - John W. Patrick
- School of Environmental and Life Sciences, College of Engineering, Science and Environment University of Newcastle Callaghan New South Wales Australia
| | - Chun‐Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement Henan University Kaifeng Henan China
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9
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Yang Z, Zhang Y, Wang G, Wen S, Wang Y, Li L, Xiao F, Hong N. The p23 of Citrus Tristeza Virus Interacts with Host FKBP-Type Peptidyl-Prolylcis-Trans Isomerase 17-2 and Is Involved in the Intracellular Movement of the Viral Coat Protein. Cells 2021; 10:934. [PMID: 33920690 PMCID: PMC8073322 DOI: 10.3390/cells10040934] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022] Open
Abstract
Citrus tristeza virus is a member of the genus Closterovirus in the family Closteroviridae. The p23 of citrus tristeza virus (CTV) is a multifunctional protein and RNA silencing suppressor. In this study, we identified a p23 interacting partner, FK506-binding protein (FKBP) 17-2, from Citrus aurantifolia (CaFKBP17-2), a susceptible host, and Nicotiana benthamiana (NbFKBP17-2), an experimental host for CTV. The interaction of p23 with CaFKBP17-2 and NbFKBP17-2 were individually confirmed by yeast two-hybrid (Y2H) and bimolecular fluorescence complementation (BiFC) assays. Subcellular localization tests showed that the viral p23 translocated FKBP17-2 from chloroplasts to the plasmodesmata of epidermal cells of N. benthamiana leaves. The knocked-down expression level of NbFKBP17-2 mRNA resulted in a decreased CTV titer in N. benthamiana plants. Further, BiFC and Y2H assays showed that NbFKBP17-2 also interacted with the coat protein (CP) of CTV, and the complexes of CP/NbFKBP17-2 rapidly moved in the cytoplasm. Moreover, p23 guided the CP/NbFKBP17-2 complexes to move along the cell wall. To the best of our knowledge, this is the first report of viral proteins interacting with FKBP17-2 encoded by plants. Our results provide insights for further revealing the mechanism of the CTV CP protein movement.
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Affiliation(s)
- Zuokun Yang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
| | - Yongle Zhang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
| | - Guoping Wang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
| | - Shaohua Wen
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Yanxiang Wang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
| | - Liu Li
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
| | - Feng Xiao
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
| | - Ni Hong
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Y.); (Y.Z.); (G.W.); (S.W.); (Y.W.); (L.L.); (F.X.)
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan 430070, China
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10
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Leastro MO, Freitas-Astúa J, Kitajima EW, Pallás V, Sánchez-Navarro JA. Unravelling the involvement of cilevirus p32 protein in the viral transport. Sci Rep 2021; 11:2943. [PMID: 33536554 PMCID: PMC7859179 DOI: 10.1038/s41598-021-82453-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 01/13/2021] [Indexed: 12/04/2022] Open
Abstract
Citrus leprosis (CL) is a severe disease that affects citrus orchards mainly in Latin America. It is caused by Brevipalpus-transmitted viruses from genera Cilevirus and Dichorhavirus. Currently, no reports have explored the movement machinery for the cilevirus. Here, we have performed a detailed functional study of the p32 movement protein (MP) of two cileviruses. Citrus leprosis-associated viruses are not able to move systemically in neither their natural nor experimental host plants. However, here we show that cilevirus MPs are able to allow the cell-to-cell and long-distance transport of movement-defective alfalfa mosaic virus (AMV). Several features related with the viral transport were explored, including: (i) the ability of cilevirus MPs to facilitate virus movement on a nucleocapsid assembly independent-manner; (ii) the generation of tubular structures from transient expression in protoplast; (iii) the capability of the N- and C- terminus of MP to interact with the cognate capsid protein (p29) and; (iv) the role of the C-terminus of p32 in the cell-to-cell and long-distance transport, tubule formation and the MP-plasmodesmata co-localization. The MP was able to direct the p29 to the plasmodesmata, whereby the C-terminus of MP is independently responsible to recruit the p29 to the cell periphery. Furthermore, we report that MP possess the capacity to enter the nucleolus and to bind to a major nucleolar protein, the fibrillarin. Based on our findings, we provide a model for the role of the p32 in the intra- and intercellular viral spread.
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Affiliation(s)
- Mikhail Oliveira Leastro
- Unidade Laboratorial de Referência em Biologia Molecular Aplicada, Instituto Biológico, São Paulo, SP, Brazil. .,Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain.
| | - Juliana Freitas-Astúa
- Unidade Laboratorial de Referência em Biologia Molecular Aplicada, Instituto Biológico, São Paulo, SP, Brazil.,Embrapa Mandioca e Fruticultura, Cruz das Almas, BA, Brazil
| | - Elliot Watanabe Kitajima
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP, Brazil
| | - Vicente Pallás
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - Jesús A Sánchez-Navarro
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain.
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11
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Awata LAO, Ifie BE, Tongoona P, Danquah E, Jumbo MB, Gowda M, Marchelo-D'ragga PW, Sitonik C, Suresh LM. Maize lethal necrosis and the molecular basis of variability in concentrations of the causal viruses in co-infected maize plant. ACTA ACUST UNITED AC 2021; 9:JGMV-09-01-0073. [PMID: 33381355 PMCID: PMC7753892 DOI: 10.5897/jgmv2019.0073] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 06/19/2019] [Indexed: 12/13/2022]
Abstract
Maize lethal necrosis (MLN) disease is new to Africa. First report was in Kenya in 2012, since then the disease has rapidly spread to most parts of eastern and central Africa region including Tanzania, Burundi, DRC Congo, Rwanda, Uganda, Ethiopia and similar symptoms were observed in South Sudan. Elsewhere, the disease was caused by infection of Maize Chlorotic Mottle Virus (MCMV) in combination with any of the potyviruses namely; maize dwarf mosaic virus (MDMV), sugarcane mosaic virus (SCMV) and tritimovirus wheat streak mosaic virus (WSMV). In Africa, the disease occurs due to combined infections of maize by MCMV and SCMV, leading to severe yield losses. Efforts to address the disease spread have been ongoing. Serological techniques including enzyme-linked immuno-sorbent assay (ELISA), polymerase chain reaction (PCR), genome-wide association (GWAS) mapping and next generation sequencing have been effectively used to detect and characterize MLN causative pathogens. Various management strategies have been adapted to control MLN including use of resistant varieties, phytosanitary measures and better cultural practices. This review looks at the current knowledge on MLN causative viruses, genetic architecture and molecular basis underlying their synergistic interactions. Lastly, some research gaps towards MLN management will be identified. The information gathered may be useful for developing strategies towards future MLN management and maize improvement in Africa.
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Affiliation(s)
- L A O Awata
- Directorate of Research, Ministry of Agriculture and Food Security, Ministries Complex, Parliament Road, P. O. Box 33, Juba, South Sudan
| | - B E Ifie
- West Africa Centre for Crop Improvement (WACCI), College of Basic and Applied Sciences, University of Ghana, PMB 30, Legon, Ghana
| | - P Tongoona
- West Africa Centre for Crop Improvement (WACCI), College of Basic and Applied Sciences, University of Ghana, PMB 30, Legon, Ghana
| | - E Danquah
- West Africa Centre for Crop Improvement (WACCI), College of Basic and Applied Sciences, University of Ghana, PMB 30, Legon, Ghana
| | - M B Jumbo
- International Maize and Wheat Improvement Center (CIMMYT), World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri. P. O. Box 1041-00621, Nairobi, Kenya
| | - M Gowda
- International Maize and Wheat Improvement Center (CIMMYT), World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri. P. O. Box 1041-00621, Nairobi, Kenya
| | - P W Marchelo-D'ragga
- Department of Agricultural Sciences, College of Natural Resources and Environmental Studies, University of Juba, P. O. Box 82 Juba, South Sudan
| | - Chelang'at Sitonik
- International Maize and Wheat Improvement Center (CIMMYT), World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri. P. O. Box 1041-00621, Nairobi, Kenya.,Department of Plant Breeding and Biotechnology, School of Agriculture and Biotechnology, University of Eldoret, P. O. Box 1125-30100, Eldoret, Kenya
| | - L M Suresh
- International Maize and Wheat Improvement Center (CIMMYT), World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri. P. O. Box 1041-00621, Nairobi, Kenya
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12
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Baslam M, Mitsui T, Sueyoshi K, Ohyama T. Recent Advances in Carbon and Nitrogen Metabolism in C3 Plants. Int J Mol Sci 2020; 22:E318. [PMID: 33396811 PMCID: PMC7795015 DOI: 10.3390/ijms22010318] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/23/2020] [Accepted: 12/23/2020] [Indexed: 12/19/2022] Open
Abstract
C and N are the most important essential elements constituting organic compounds in plants. The shoots and roots depend on each other by exchanging C and N through the xylem and phloem transport systems. Complex mechanisms regulate C and N metabolism to optimize plant growth, agricultural crop production, and maintenance of the agroecosystem. In this paper, we cover the recent advances in understanding C and N metabolism, regulation, and transport in plants, as well as their underlying molecular mechanisms. Special emphasis is given to the mechanisms of starch metabolism in plastids and the changes in responses to environmental stress that were previously overlooked, since these changes provide an essential store of C that fuels plant metabolism and growth. We present general insights into the system biology approaches that have expanded our understanding of core biological questions related to C and N metabolism. Finally, this review synthesizes recent advances in our understanding of the trade-off concept that links C and N status to the plant's response to microorganisms.
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Affiliation(s)
- Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan; (M.B.); (T.M.)
| | - Toshiaki Mitsui
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan; (M.B.); (T.M.)
- Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan;
| | - Kuni Sueyoshi
- Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan;
| | - Takuji Ohyama
- Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan;
- Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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13
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Zhou Y, Ghidey MR, Pruett G, Kearney CM. The use of functionally deficient viral vectors as visualization tools to reveal complementation patterns between plant viruses and the silencing suppressor p19. J Virol Methods 2020; 286:113980. [PMID: 33010375 DOI: 10.1016/j.jviromet.2020.113980] [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: 11/02/2019] [Revised: 08/10/2020] [Accepted: 09/24/2020] [Indexed: 10/23/2022]
Abstract
Plant virus transport complementation is classically observed as a helper virus allowing another virus to regain cell-to-cell or systemic movement through a restrictive host plant (Malyshenko et al., 1989). The complementation effect is usually studied by observing virus infection after co-infection or super-inoculation of the helper virus. We herein demonstrate the utility of functionally deficient viral vectors as tools to determine the contribution of individual viral genes to plant viral transport complementation. Two functionally deficient viral vectors were engineered that derive from foxtail mosaic potexvirus and sunn-hemp mosaic tobamovirus, namely FECT (FoMV Eliminate CP and TGB, (Liu and Kearney, 2010)) and SHEC (SHMV Eliminate CP gene, (Liu and Kearney, 2010)), respectively. FECT had all the ORFs removed except for the replicase and thus is defective for both long-distance and cell-to-cell movement. SHEC lacked only the coat protein ORF and retained the movement protein (MP) and is functional for cell-to-cell movement. When FECT and SHEC vectors were inoculated with the silencing suppressor p19 in different zones of the same leaf, FECT was enabled to express its reporter gene beyond the original inoculation zone. When FECT, SHEC, and p19 were individually inoculated in separate zones, both FECT and SHEC reporter gene expression was observed within the p19 zone, distant from the original virus inoculation points. These observations indicate that SHEC movement protein could create a trafficking network to allow viral RNAs of FECT and SHEC and p19/p19 transcript to move from cell to cell. This system provides a tool to visually monitor the movement of viruses and silencing suppressors as well as to identify the effects of individual viral components on virus movement.
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Affiliation(s)
- Yiyang Zhou
- Institute of Biomedical Studies, Baylor University, Waco, TX, USA
| | - Meron R Ghidey
- Institute of Biomedical Studies, Baylor University, Waco, TX, USA
| | - Grace Pruett
- Department of Biology, Baylor University, Waco, TX, USA
| | - Christopher M Kearney
- Institute of Biomedical Studies, Baylor University, Waco, TX, USA; Department of Biology, Baylor University, Waco, TX, USA.
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14
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Incarbone M, Scheer H, Hily JM, Kuhn L, Erhardt M, Dunoyer P, Altenbach D, Ritzenthaler C. Characterization of a DCL2-Insensitive Tomato Bushy Stunt Virus Isolate Infecting Arabidopsis thaliana. Viruses 2020; 12:E1121. [PMID: 33023227 PMCID: PMC7650723 DOI: 10.3390/v12101121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/29/2020] [Accepted: 09/30/2020] [Indexed: 12/17/2022] Open
Abstract
Tomato bushy stunt virus (TBSV), the type member of the genus Tombusvirus in the family Tombusviridae is one of the best studied plant viruses. The TBSV natural and experimental host range covers a wide spectrum of plants including agricultural crops, ornamentals, vegetables and Nicotiana benthamiana. However, Arabidopsis thaliana, the well-established model organism in plant biology, genetics and plant-microbe interactions is absent from the list of known TBSV host plant species. Most of our recent knowledge of the virus life cycle has emanated from studies in Saccharomyces cerevisiae, a surrogate host for TBSV that lacks crucial plant antiviral mechanisms such as RNA interference (RNAi). Here, we identified and characterized a TBSV isolate able to infect Arabidopsis with high efficiency. We demonstrated by confocal and 3D electron microscopy that in Arabidopsis TBSV-BS3Ng replicates in association with clustered peroxisomes in which numerous spherules are induced. A dsRNA-centered immunoprecipitation analysis allowed the identification of TBSV-associated host components including DRB2 and DRB4, which perfectly localized to replication sites, and NFD2 that accumulated in larger viral factories in which peroxisomes cluster. By challenging knock-out mutants for key RNAi factors, we showed that TBSV-BS3Ng undergoes a non-canonical RNAi defensive reaction. In fact, unlike other RNA viruses described, no 22nt TBSV-derived small RNA are detected in the absence of DCL4, indicating that this virus is DCL2-insensitive. The new Arabidopsis-TBSV-BS3Ng pathosystem should provide a valuable new model for dissecting plant-virus interactions in complement to Saccharomyces cerevisiae.
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Affiliation(s)
- Marco Incarbone
- Institut de Biologie de Moléculaire des Plantes, CNRS, Université de Strasbourg, 67000 Strasbourg, France; (H.S.); (M.E.); (P.D.)
| | - Hélene Scheer
- Institut de Biologie de Moléculaire des Plantes, CNRS, Université de Strasbourg, 67000 Strasbourg, France; (H.S.); (M.E.); (P.D.)
| | - Jean-Michel Hily
- IFV, Le Grau-Du-Roi, Université de Strasbourg, INRAE, SVQV UNR-A 1131, 68000 Colmar, France;
| | - Lauriane Kuhn
- Plateforme protéomique Strasbourg Esplanade FR1589 du CNRS, Université de Strasbourg, 67000 Strasbourg, France;
| | - Mathieu Erhardt
- Institut de Biologie de Moléculaire des Plantes, CNRS, Université de Strasbourg, 67000 Strasbourg, France; (H.S.); (M.E.); (P.D.)
| | - Patrice Dunoyer
- Institut de Biologie de Moléculaire des Plantes, CNRS, Université de Strasbourg, 67000 Strasbourg, France; (H.S.); (M.E.); (P.D.)
| | - Denise Altenbach
- Bioreba AG, Christoph Merian Ring 7, CH-4153 Reinach, Switzerland;
| | - Christophe Ritzenthaler
- Institut de Biologie de Moléculaire des Plantes, CNRS, Université de Strasbourg, 67000 Strasbourg, France; (H.S.); (M.E.); (P.D.)
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15
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Kappagantu M, Collum TD, Dardick C, Culver JN. Viral Hacks of the Plant Vasculature: The Role of Phloem Alterations in Systemic Virus Infection. Annu Rev Virol 2020; 7:351-370. [PMID: 32453971 DOI: 10.1146/annurev-virology-010320-072410] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
For plant viruses, the ability to load into the vascular phloem and spread systemically within a host is an essential step in establishing a successful infection. However, access to the vascular phloem is highly regulated, representing a significant obstacle to virus loading, movement, and subsequent unloading into distal uninfected tissues. Recent studies indicate that during virus infection, phloem tissues are a source of significant transcriptional and translational alterations, with the number of virus-induced differentially expressed genes being four- to sixfold greater in phloem tissues than in surrounding nonphloem tissues. In addition, viruses target phloem-specific components as a means to promote their own systemic movement and disrupt host defense processes. Combined, these studies provide evidence that the vascular phloem plays a significant role in the mediation and control of host responses during infection and as such is a site of considerable modulation by the infecting virus. This review outlines the phloem responses and directed reprograming mechanisms that viruses employ to promote their movement through the vasculature.
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Affiliation(s)
- Madhu Kappagantu
- Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, Maryland 20742, USA;
| | - Tamara D Collum
- Foreign Disease-Weed Science Research Unit, US Department of Agriculture Agricultural Research Service, Frederick, Maryland 21702, USA
| | - Christopher Dardick
- Appalachian Fruit Research Station, US Department of Agriculture Agricultural Research Service, Kearneysville, West Virginia 25430, USA
| | - James N Culver
- Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, Maryland 20742, USA; .,Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20742, USA
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16
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Jabbar B, Iqbal MS, Batcho AA, Nasir IA, Rashid B, Husnain T, Henry RJ. Target prediction of candidate miRNAs from Oryza sativa for silencing the RYMV genome. Comput Biol Chem 2019; 83:107127. [PMID: 31542706 DOI: 10.1016/j.compbiolchem.2019.107127] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 04/02/2019] [Accepted: 09/12/2019] [Indexed: 11/29/2022]
Abstract
In order to maintain a consistent supply of rice globally, control of pathogens affecting crop production is a matter of due concern. Rice yellow mottle virus(RYMV) is known to cause a variety of symptoms which can result in reduced yield. Four ORFs can be identified in the genome of RYMV encoding for P1 (ORF1), Polyprotein (processed to produce VPg, protease, helicase, RdRp4) (ORF2), putative RdRp (ORF3) and capsid/coat protein (ORF4). This research was aimed at identifying genome encoded miRNAs of O. sativa that are targeted to the genome of Rice Yellow Mottle Virus (RYMV). A consensus of four miRNA target prediction algorithms (RNA22, miRanda, TargetFinder and psRNATarget) was computed, followed by calculation of free energies of miRNA-mRNA duplex formation. A phylogenetic tree was constructed to portray the evolutionary relationships between RYMV strains isolated to date. From the consensus of algorithms used, a total of seven O. sativa miRNAs were predicted and conservation of target site was finally evaluated. Predicted miRNAs can be further evaluated by experiments involving the testing of the success of in vitro gene silencing of RYMV genome; this can pave the way for development of RYMV resistant rice varieties in the future.
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Affiliation(s)
- Basit Jabbar
- Center of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan.
| | - Muhammad Shahzad Iqbal
- Center of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan; Queensland Alliance for Agriculture and Food Innovation, University of Queensland, Brisbane, Australia.
| | - Anicet A Batcho
- Center of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan.
| | - Idrees A Nasir
- Center of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan.
| | - Bushra Rashid
- Center of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan.
| | - Tayyab Husnain
- Center of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan.
| | - Robert J Henry
- Queensland Alliance for Agriculture and Food Innovation, University of Queensland, Brisbane, Australia.
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17
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Cody WB, Scholthof HB. Plant Virus Vectors 3.0: Transitioning into Synthetic Genomics. ANNUAL REVIEW OF PHYTOPATHOLOGY 2019; 57:211-230. [PMID: 31185187 DOI: 10.1146/annurev-phyto-082718-100301] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Plant viruses were first implemented as heterologous gene expression vectors more than three decades ago. Since then, the methodology for their use has varied, but we propose it was the merging of technologies with virology tools, which occurred in three defined steps discussed here, that has driven viral vector applications to date. The first was the advent of molecular biology and reverse genetics, which enabled the cloning and manipulation of viral genomes to express genes of interest (vectors 1.0). The second stems from the discovery of RNA silencing and the development of high-throughput sequencing technologies that allowed the convenient and widespread use of virus-induced gene silencing (vectors 2.0). Here, we briefly review the events that led to these applications, but this treatise mainly concentrates on the emerging versatility of gene-editing tools, which has enabled the emergence of virus-delivered genetic queries for functional genomics and virology (vectors 3.0).
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Affiliation(s)
- Will B Cody
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843, USA;
- Shriram Center for Biological and Chemical Engineering, Stanford University, Stanford, California 94305, USA
| | - Herman B Scholthof
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843, USA;
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18
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Zhou X, Lin W, Sun K, Wang S, Zhou X, Jackson AO, Li Z. Specificity of Plant Rhabdovirus Cell-to-Cell Movement. J Virol 2019; 93:e00296-19. [PMID: 31118256 PMCID: PMC6639277 DOI: 10.1128/jvi.00296-19] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 05/15/2019] [Indexed: 12/13/2022] Open
Abstract
Positive-stranded RNA virus movement proteins (MPs) generally lack sequence-specific nucleic acid-binding activities and display cross-family movement complementarity with related and unrelated viruses. Negative-stranded RNA plant rhabdoviruses encode MPs with limited structural and functional relatedness with other plant virus counterparts, but the precise mechanisms of intercellular transport are obscure. In this study, we first analyzed the abilities of MPs encoded by five distinct rhabdoviruses to support cell-to-cell movement of two positive-stranded RNA viruses by using trans-complementation assays. Each of the five rhabdovirus MPs complemented the movement of MP-defective mutants of tomato mosaic virus and potato X virus. In contrast, movement of recombinant MP deletion mutants of sonchus yellow net nucleorhabdovirus (SYNV) and tomato yellow mottle-associated cytorhabdovirus (TYMaV) was rescued only by their corresponding MPs, i.e., SYNV sc4 and TYMaV P3. Subcellular fractionation analyses revealed that SYNV sc4 and TYMaV P3 were peripherally associated with cell membranes. A split-ubiquitin membrane yeast two-hybrid assay demonstrated specific interactions of the membrane-associated rhabdovirus MPs only with their cognate nucleoproteins (N) and phosphoproteins (P). More importantly, SYNV sc4-N and sc4-P interactions directed a proportion of the N-P complexes from nuclear sites of replication to punctate loci at the cell periphery that partially colocalized with the plasmodesmata. Our data show that cell-to-cell movement of plant rhabdoviruses is highly specific and suggest that cognate MP-nucleocapsid core protein interactions are required for intra- and intercellular trafficking.IMPORTANCE Local transport of plant rhabdoviruses likely involves the passage of viral nucleocapsids through MP-gated plasmodesmata, but the molecular mechanisms are not fully understood. We have conducted complementation assays with MPs encoded by five distinct rhabdoviruses to assess their movement specificity. Each of the rhabdovirus MPs complemented the movement of MP-defective mutants of two positive-stranded RNA viruses that have different movement strategies. In marked contrast, cell-to-cell movement of two recombinant plant rhabdoviruses was highly specific in requiring their cognate MPs. We have shown that these rhabdovirus MPs are localized to the cell periphery and associate with cellular membranes, and that they interact only with their cognate nucleocapsid core proteins. These interactions are able to redirect viral nucleocapsid core proteins from their sites of replication to the cell periphery. Our study provides a model for the specific inter- and intracellular trafficking of plant rhabdoviruses that may be applicable to other negative-stranded RNA viruses.
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Affiliation(s)
- Xin Zhou
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Wenye Lin
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Kai Sun
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Shuo Wang
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Xueping Zhou
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Andrew O Jackson
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, California, USA
| | - Zhenghe Li
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, Hangzhou, China
- Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Zhejiang University, Hangzhou, China
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19
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Navarro JA, Sanchez-Navarro JA, Pallas V. Key checkpoints in the movement of plant viruses through the host. Adv Virus Res 2019; 104:1-64. [PMID: 31439146 DOI: 10.1016/bs.aivir.2019.05.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Plant viruses cannot exploit any of the membrane fusion-based routes of entry described for animal viruses. In addition, one of the distinctive structures of plant cells, the cell wall, acts as the first barrier against the invasion of pathogens. To overcome the rigidity of the cell wall, plant viruses normally take advantage of the way of life of different biological vectors. Alternatively, the physical damage caused by environmental stresses can facilitate virus entry. Once inside the cell and taking advantage of the characteristic symplastic continuity of plant cells, viruses need to remodel and/or modify the restricted pore size of the plasmodesmata (channels that connect plant cells). In a successful interaction for the virus, it can reach the vascular tissue to systematically invade the plant. The connections between the different cell types in this path are not designed to allow the passage of molecules with the complexity of viruses. During this process, viruses face different cell barriers that must be overcome to reach the distal parts of the plant. In this review, we highlight the current knowledge about how plant RNA viruses enter plant cells, move between them to reach vascular cells and overcome the different physical and cellular barriers that the phloem imposes. Finally, we update the current research on cellular organelles as key regulator checkpoints in the long-distance movement of plant viruses.
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Affiliation(s)
- Jose A Navarro
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Valencia, Spain
| | - Jesus A Sanchez-Navarro
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Valencia, Spain
| | - Vicente Pallas
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Valencia, Spain.
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Leastro MO, Kitajima EW, Silva MS, Resende RO, Freitas-Astúa J. Dissecting the Subcellular Localization, Intracellular Trafficking, Interactions, Membrane Association, and Topology of Citrus Leprosis Virus C Proteins. FRONTIERS IN PLANT SCIENCE 2018; 9:1299. [PMID: 30254655 PMCID: PMC6141925 DOI: 10.3389/fpls.2018.01299] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 08/17/2018] [Indexed: 05/17/2023]
Abstract
Citrus leprosis (CL) is a re-emergent viral disease affecting citrus crops in the Americas, and citrus leprosis virus C (CiLV-C), belonging to the genus Cilevirus, is the main pathogen responsible for the disease. Despite the economic importance of CL to the citrus industry, very little is known about the performance of viral proteins. Here, we present a robust in vivo study around functionality of p29, p15, p61, MP, and p24 CiLV-C proteins in the host cells. The intracellular sub-localization of all those viral proteins in plant cells are shown, and their co-localization with the endoplasmic reticulum (ER), Golgi complex (GC) (p15, MP, p61 and p24), actin filaments (p29, p15 and p24), nucleus (p15), and plasmodesmata (MP) are described. Several features are disclosed, including i) ER remodeling and redistribution of GC apparatus, ii) trafficking of the p29 and MP along the ER network system, iii) self-interaction of the p29, p15, and p24 and hetero-association between p29-p15, p29-MP, p29-p24, and p15-MP proteins in vivo. We also showed that all proteins are associated with biological membranes; whilst p15 is peripherally associated, p29, p24, and MP are integrally bound to cell membranes. Furthermore, while p24 exposes an N-cytoplasm-C-lumen topology, p29, and p15 are oriented toward the cytoplasmic face of the biological membrane. Based on our findings, we discuss the possible performance of each protein in the context of infection and a hypothetical model encompassing the virus spread and sites for replication and particle assembly is suggested.
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Affiliation(s)
| | - Elliot Watanabe Kitajima
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Marilia Santos Silva
- Laboratório de Bioimagem, Embrapa Recursos Genéticos e Biotecnologia, Brasilia, Brazil
| | | | - Juliana Freitas-Astúa
- Departamento de Bioquímica Fitopatológica, Instituto Biológico, São Paulo, Brazil
- Embrapa Mandioca e Fruticultura, Cruz das Almas, Bahia, Brazil
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21
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Huang YP, Huang YW, Chen IH, Shenkwen LL, Hsu YH, Tsai CH. Plasma membrane-associated cation-binding protein 1-like protein negatively regulates intercellular movement of BaMV. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4765-4774. [PMID: 28992255 PMCID: PMC5853580 DOI: 10.1093/jxb/erx307] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 08/04/2017] [Indexed: 05/13/2023]
Abstract
To establish a successful infection, a virus needs to replicate and move cell-to-cell efficiently. We investigated whether one of the genes upregulated in Nicotiana benthamiana after Bamboo mosaic virus (BaMV) inoculation was involved in regulating virus movement. We revealed the gene to be a plasma membrane-associated cation-binding protein 1-like protein, designated NbPCaP1L. The expression of NbPCaP1L in N. benthamiana was knocked down using Tobacco rattle virus-based gene silencing and consequently the accumulation of BaMV increased significantly to that of control plants. Further analysis indicated no significant difference in the accumulation of BaMV in NbPCaP1L knockdown and control protoplasts, suggesting NbPCaP1L may affect cell-to-cell movement of BaMV. Using a viral vector expressing green fluorescent protein in the knockdown plants, the mean area of viral focus, as determined by fluorescence, was found to be larger in NbPCaP1L knockdown plants. Orange fluorescence protein (OFP)-fused NbPCaP1L, NbPCaP1L-OFP, was expressed in N. benthamiana and reduced the accumulation of BaMV to 46%. To reveal the possible interaction of viral protein with NbPCaP1L, we performed yeast two-hybrid and co-immunoprecipitation experiments. The results indicated that NbPCaP1L interacted with BaMV replicase. The results also suggested that NbPCaP1L could trap the BaMV movement RNP complex via interaction with the viral replicase in the complex and so restricted viral cell-to-cell movement.
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Affiliation(s)
- Ying-Ping Huang
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
| | - Ying-Wen Huang
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
| | - I-Hsuan Chen
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
| | - Lin-Ling Shenkwen
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
| | - Yau-Huei Hsu
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
| | - Ching-Hsiu Tsai
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
- Research Center for Sustainable Energy and Nanotechnology, National Chung Hsing University, Taichung, 402, Taiwan
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22
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Collum TD, Culver JN. Tobacco mosaic virus infection disproportionately impacts phloem associated translatomes in Arabidopsis thaliana and Nicotiana benthamiana. Virology 2017; 510:76-89. [PMID: 28710959 DOI: 10.1016/j.virol.2017.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 06/27/2017] [Accepted: 07/03/2017] [Indexed: 02/07/2023]
Abstract
In this study we use vascular specific promoters and a translating ribosome affinity purification strategy to identify phloem associated translatome responses to infection by tobacco mosaic virus (TMV) in systemic hosts Arabidopsis thaliana ecotype Shahdara and Nicotiana benthamiana. Results demonstrate that in both hosts the number of translatome gene alterations that occurred in response to infection is at least four fold higher in phloem specific translatomes than in non-phloem translatomes. This finding indicates that phloem functions as a key responsive tissue to TMV infection. In addition, host comparisons of translatome alterations reveal both similarities and differences in phloem responses to infection, representing both conserved virus induced phloem alterations involved in promoting infection and virus spread as well as host specific alterations that reflect differences in symptom responses. Combined these results suggest phloem tissues play a disproportion role in the mediation and control of host responses to virus infection.
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Affiliation(s)
- Tamara D Collum
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD 20742, USA; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
| | - James N Culver
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD 20742, USA; Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD 20742, USA.
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23
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Leastro MO, Pallás V, Resende RO, Sánchez-Navarro JA. The functional analysis of distinct tospovirus movement proteins (NS M) reveals different capabilities in tubule formation, cell-to-cell and systemic virus movement among the tospovirus species. Virus Res 2016; 227:57-68. [PMID: 27697453 DOI: 10.1016/j.virusres.2016.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 09/27/2016] [Accepted: 09/29/2016] [Indexed: 12/22/2022]
Abstract
The lack of infectious tospovirus clones to address reverse genetic experiments has compromised the functional analysis of viral proteins. In the present study we have performed a functional analysis of the movement proteins (NSM) of four tospovirus species Bean necrotic mosaic virus (BeNMV), Chrysanthemum stem necrosis virus (CSNV), Tomato chlorotic spot virus (TCSV) and Tomato spotted wilt virus (TSWV), which differ biologically and molecularly, by using the Alfalfa mosaic virus (AMV) model system. All NSM proteins were competent to: i) support the cell-to-cell and systemic transport of AMV, ii) generate tubular structures on infected protoplast and iii) transport only virus particles. However, the NSM of BeNMV (one of the most phylogenetically distant species) was very inefficient to support the systemic transport. Deletion assays revealed that the C-terminal region of the BeNMV NSM, but not that of the CSNV, TCSV and TSWV NSM proteins, was dispensable for cell-to-cell transport, and that all the non-functional C-terminal NSM mutants were unable to generate tubular structures. Bimolecular fluorescence complementation analysis revealed that the C-terminus of the BeNMV NSM was not required for the interaction with the cognate nucleocapsid protein, showing a different protein organization when compared with other movement proteins of the '30K family'. Overall, our results revealed clearly differences in functional aspects among movement proteins from divergent tospovirus species that have a distinct biological behavior.
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Affiliation(s)
- Mikhail O Leastro
- Departamento de Biologia Celular, Universidade de Brasília, 70910-900 Brasília, Brazil.
| | - Vicente Pallás
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Consejo Superior de investigaciones Científicas-Universidad Politécnica de Valencia, Valencia, Spain.
| | - Renato O Resende
- Departamento de Biologia Celular, Universidade de Brasília, 70910-900 Brasília, Brazil.
| | - Jesús A Sánchez-Navarro
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Consejo Superior de investigaciones Científicas-Universidad Politécnica de Valencia, Valencia, Spain.
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Kumari R, Kumar S, Singh L, Hallan V. Movement Protein of Cucumber Mosaic Virus Associates with Apoplastic Ascorbate Oxidase. PLoS One 2016; 11:e0163320. [PMID: 27668429 PMCID: PMC5036820 DOI: 10.1371/journal.pone.0163320] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 09/07/2016] [Indexed: 01/13/2023] Open
Abstract
Plant viral movement proteins facilitate virion movement mainly through interaction with a number of factors from the host. We report the association of a cell wall localized ascorbate oxidase (CsAO4) from Cucumis sativus with the movement protein (MP) of Cucumber mosaic virus (CMV). This was identified first in a yeast two-hybrid screen and validated by in vivo pull down and bimolecular fluorescence complementation (BiFC) assays. The BiFC assay showed localization of the bimolecular complexes of these proteins around the cell wall periphery as punctate spots. The expression of CsAO4 was induced during the initial infection period (up to 72 h) in CMV infected Nicotiana benthamiana plants. To functionally validate its role in viral spread, we analyzed the virus accumulation in CsAO4 overexpressing Arabidopsis thaliana and transiently silenced N. benthamiana plants (through a Tobacco rattle virus vector). Overexpression had no evident effect on virus accumulation in upper non-inoculated leaves of transgenic lines in comparison to WT plants at 7 days post inoculation (dpi). However, knockdown resulted in reduced CMV accumulation in systemic (non-inoculated) leaves of NbΔAO-pTRV2 silenced plants as compared to TRV inoculated control plants at 5 dpi (up to 1.3 fold difference). In addition, functional validation supported the importance of AO in plant development. These findings suggest that AO and viral MP interaction helps in early viral movement; however, it had no major effect on viral accumulation after 7 dpi. This study suggests that initial induction of expression of AO on virus infection and its association with viral MP helps both towards targeting of the MP to the apoplast and disrupting formation of functional AO dimers for spread of virus to nearby cells, reducing the redox defense of the plant during initial stages of infection.
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Affiliation(s)
- Reenu Kumari
- Plant Virology lab, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, Himachal Pradesh, India
- Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India
| | - Surender Kumar
- Plant Virology lab, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, Himachal Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT) Campus, Palampur, India
| | - Lakhmir Singh
- Department of Biotechnology, DAV University, Sarmastpur, Jalandhar, 144012, Punjab, India
| | - Vipin Hallan
- Plant Virology lab, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, Himachal Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT) Campus, Palampur, India
- * E-mail:
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25
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Margaria P, Anderson CT, Turina M, Rosa C. Identification of Ourmiavirus 30K movement protein amino acid residues involved in symptomatology, viral movement, subcellular localization and tubule formation. MOLECULAR PLANT PATHOLOGY 2016; 17:1063-79. [PMID: 26637973 PMCID: PMC6638536 DOI: 10.1111/mpp.12348] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 11/26/2015] [Indexed: 05/03/2023]
Abstract
Several plant viruses encode movement proteins (MPs) classified in the 30K superfamily. Despite a great functional diversity, alignment analysis of MP sequences belonging to the 30K superfamily revealed the presence of a central core region, including amino acids potentially critical for MP structure and functionality. We performed alanine-scanning mutagenesis of the Ourmia melon virus (OuMV) MP, and studied the effects of amino acid substitutions on MP properties and virus infection. We identified five OuMV mutants that were impaired in systemic infection in Nicotiana benthamiana and Arabidopsis thaliana, and two mutants showing necrosis and pronounced mosaic symptoms, respectively, in N. benthamiana. Green fluorescent protein fusion constructs (GFP:MP) of movement-defective MP alleles failed to localize in distinct foci at the cell wall, whereas a GFP fusion with wild-type MP (GFP:MPwt) mainly co-localized with plasmodesmata and accumulated at the periphery of epidermal cells. The movement-defective mutants also failed to produce tubular protrusions in protoplasts isolated from infected leaves, suggesting a link between tubule formation and the ability of OuMV to move. In addition to providing data to support the importance of specific amino acids for OuMV MP functionality, we predict that these conserved residues might be critical for the correct folding and/or function of the MP of other viral species in the 30K superfamily.
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Affiliation(s)
- Paolo Margaria
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Charles T Anderson
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Massimo Turina
- Istituto per la Protezione Sostenibile delle Piante, CNR, 10135, Torino, Italy
| | - Cristina Rosa
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA, 16802, USA
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26
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ORF43 of maize rayado fino virus is dispensable for systemic infection of maize and transmission by leafhoppers. Virus Genes 2016; 52:303-7. [PMID: 26837893 DOI: 10.1007/s11262-016-1287-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 01/02/2016] [Indexed: 10/22/2022]
Abstract
Maize rayado fino virus (MRFV) possesses an open reading frame (ORF43) predicted to encode a 43 kDa protein (p43) that has been postulated to be a viral movement protein. Using a clone of MRFV (pMRFV-US) from which infectious RNA can be produced, point mutations were introduced to either prevent initiation from three potential AUG initiation codons near the 5'-end of ORF43 or prematurely terminate translation of ORF43. Inoculation of maize seed via vascular puncture inoculation (VPI) resulted in plants exhibiting symptoms typical of MRFV infection for all mutants tested. Furthermore, corn leafhoppers (Dalbulus maidis) transmitted the virus mutants to healthy plants at a frequency similar to that for wild-type MRFV-US. Viral RNA recovered from plants infected with mutants both prior to and after leafhopper transmission retained mutations blocking ORF43 expression. The results indicate that ORF43 of MRFV is dispensable for both systemic infection of maize and transmission by leafhoppers.
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Mann KS, Bejerman N, Johnson KN, Dietzgen RG. Cytorhabdovirus P3 genes encode 30K-like cell-to-cell movement proteins. Virology 2016; 489:20-33. [PMID: 26700068 DOI: 10.1016/j.virol.2015.11.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 12/13/2022]
Abstract
Plant viruses encode movement proteins (MP) to facilitate cell-to-cell transport through plasmodesmata. In this study, using trans-complementation of a movement-defective turnip vein-clearing tobamovirus (TVCV) replicon, we show for the first time for cytorhabdoviruses (lettuce necrotic yellows virus (LNYV) and alfalfa dwarf virus (ADV)) that their P3 proteins function as MP similar to the TVCV P30 protein. All three MP localized to plasmodesmata when ectopically expressed. In addition, we show that these MP belong to the 30K superfamily since movement was inhibited by mutation of an aspartic acid residue in the critical 30K-specific LxD/N50-70G motif. We also report that Nicotiana benthamiana microtubule-associated VOZ1-like transcriptional activator interacts with LNYV P3 and TVCV P30 but not with ADV P3 or any of the MP point mutants. This host protein, which is known to interact with P3 of sonchus yellow net nucleorhabdovirus, may be involved in aiding the cell-to-cell movement of LNYV and TVCV.
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Affiliation(s)
- Krin S Mann
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Nicolas Bejerman
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Karyn N Johnson
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Ralf G Dietzgen
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia.
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Tekoah Y, Shulman A, Kizhner T, Ruderfer I, Fux L, Nataf Y, Bartfeld D, Ariel T, Gingis-Velitski S, Hanania U, Shaaltiel Y. Large-scale production of pharmaceutical proteins in plant cell culture-the Protalix experience. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:1199-208. [PMID: 26102075 DOI: 10.1111/pbi.12428] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 05/14/2015] [Accepted: 05/26/2015] [Indexed: 05/07/2023]
Abstract
Protalix Biotherapeutics develops recombinant human proteins and produces them in plant cell culture. Taliglucerase alfa has been the first biotherapeutic expressed in plant cells to be approved by regulatory authorities around the world. Other therapeutic proteins are being developed and are currently at various stages of the pipeline. This review summarizes the major milestones reached by Protalix Biotherapeutics to enable the development of these biotherapeutics, including platform establishment, cell line selection, manufacturing process and good manufacturing practice principles to consider for the process. Examples of the various products currently being developed are also presented.
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Affiliation(s)
| | | | | | | | - Liat Fux
- Protalix Biotherapeutics, Carmiel, Israel
| | | | | | - Tami Ariel
- Protalix Biotherapeutics, Carmiel, Israel
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29
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Schwab F, Zhai G, Kern M, Turner A, Schnoor JL, Wiesner MR. Barriers, pathways and processes for uptake, translocation and accumulation of nanomaterials in plants – Critical review. Nanotoxicology 2015; 10:257-78. [DOI: 10.3109/17435390.2015.1048326] [Citation(s) in RCA: 350] [Impact Index Per Article: 38.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Fabienne Schwab
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA,
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, NC, USA, and
| | - Guangshu Zhai
- Department of Civil and Environmental Engineering, The University of Iowa, Iowa City, IA, USA
| | - Meaghan Kern
- Department of Civil and Environmental Engineering, The University of Iowa, Iowa City, IA, USA
| | - Amalia Turner
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA,
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, NC, USA, and
| | - Jerald L. Schnoor
- Department of Civil and Environmental Engineering, The University of Iowa, Iowa City, IA, USA
| | - Mark R. Wiesner
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA,
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, NC, USA, and
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30
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Patil BL, Fauquet CM. Light intensity and temperature affect systemic spread of silencing signal in transient agroinfiltration studies. MOLECULAR PLANT PATHOLOGY 2015; 16:484-94. [PMID: 25220764 PMCID: PMC6638542 DOI: 10.1111/mpp.12205] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
RNA silencing is a sequence-specific post-transcriptional gene inactivation mechanism that operates in diverse organisms and that can extend beyond its site of initiation, owing to the movement of the silencing signal, called non-autonomous gene silencing. Previous studies have shown that several factors manifest the movement of the silencing signal, such as the size (21 or 24 nucleotides) of the secondary small interfering RNA (siRNA) produced, the steady-state concentration of siRNAs and their cognate messenger RNA (mRNA) or a change in the sink-source status of plant parts affecting phloem translocation. Our study shows that both light intensity and temperature have a significant impact on the systemic movement of the silencing signal in transient agroinfiltration studies in Nicotiana benthamiana. At higher light intensities (≥ 450 μE/m(2)/s) and higher temperatures (≥ 30 °C), gene silencing was localized to leaf tissue that was infiltrated, without any systemic spread. Interestingly, in these light and temperature conditions (≥ 450 μE/m(2) /s and ≥ 30 °C), the N. benthamiana plants showed recovery from the viral symptoms. However, the reduced systemic silencing and reduced viral symptom severity at higher light intensities were caused by a change in the sink-source status of the plant, ultimately affecting the phloem translocation of small RNAs or the viral genome. In contrast, at lower light intensities (<300 μE/m(2)/s) with a constant temperature of 25 °C, there was strong systemic movement of the silencing signal in the N. benthamiana plants and reduced recovery from virus infections. The accumulation of gene-specific siRNAs was reduced at higher temperature as a result of a reduction in the accumulation of transcript on transient agroinfiltration of RNA interference (RNAi) constructs, mostly because of poor T-DNA transfer activity of Agrobacterium, possibly also accompanied by reduced phloem translocation.
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Affiliation(s)
- Basavaprabhu L Patil
- Donald Danforth Plant Science Center, 975 N. Warson Rd., St. Louis, MO, 63132, USA; National Research Centre on Plant Biotechnology, IARI, Pusa Campus, New Delhi, 110012, India
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Liou MR, Hu CC, Chou YL, Chang BY, Lin NS, Hsu YH. Viral elements and host cellular proteins in intercellular movement of Bamboo mosaic virus. Curr Opin Virol 2015; 12:99-108. [PMID: 25951346 DOI: 10.1016/j.coviro.2015.04.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 04/15/2015] [Accepted: 04/17/2015] [Indexed: 12/23/2022]
Abstract
As a member of the genus Potexvirus, Bamboo mosaic virus (BaMV) also belongs to the plant viruses that encode triple gene block proteins (TGBps) for intercellular movement within the host plants. Recent studies of the movement mechanisms of BaMV have revealed similarities and differences between BaMV and other potexviruses. This review focuses on the general aspects of viral and host elements involved in BaMV movement, the interactions among these elements, and the possible pathways for intra- and intercellular trafficking of BaMV. Major features of BaMV trafficking that have not been demonstrated in other potexviruses include: (i) the involvement of replicase, (ii) fine regulation by coat protein phosphorylation, (iii) the key roles played by TGBp3, (iv) the use of virions as the major transported form, and (v) the involvement of specific host factors, such as Ser/Thr kinase-like protein of Nicotiana benthamiana. We also highlight areas for future study that will provide a more comprehensive understanding of the detailed interactions among viral movement proteins and host factors, as well as the regulatory mechanisms of virus movement. Finally, a model based on the current knowledge is proposed to depict the diverse abilities of BaMV to utilize a wide range of mechanisms for efficient intercellular movement.
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Affiliation(s)
- Ming-Ru Liou
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 40227, Taiwan
| | - Chung-Chi Hu
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yuan-Lin Chou
- Institute of Biochemistry, National Chung Hsing University, Taichung 40227, Taiwan
| | - Ban-Yang Chang
- Institute of Biochemistry, National Chung Hsing University, Taichung 40227, Taiwan
| | - Na-Sheng Lin
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 40227, Taiwan; Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Yau-Heiu Hsu
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 40227, Taiwan.
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32
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Zhirnov IV, Trifonova EA, Kochetov AV, Shumny VK. Virus-induced silencing as a method for studying gene functions in higher plants. RUSS J GENET+ 2015. [DOI: 10.1134/s1022795415050099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Leastro M, Pallás V, Resende R, Sánchez-Navarro J. The movement proteins (NSm) of distinct tospoviruses peripherally associate with cellular membranes and interact with homologous and heterologous NSm and nucleocapsid proteins. Virology 2015; 478:39-49. [DOI: 10.1016/j.virol.2015.01.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 01/06/2015] [Accepted: 01/31/2015] [Indexed: 01/26/2023]
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Mushegian AR, Elena SF. Evolution of plant virus movement proteins from the 30K superfamily and of their homologs integrated in plant genomes. Virology 2015; 476:304-315. [DOI: 10.1016/j.virol.2014.12.012] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/04/2014] [Accepted: 12/06/2014] [Indexed: 12/01/2022]
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Kumar D, Kumar R, Hyun TK, Kim JY. Cell-to-cell movement of viruses via plasmodesmata. JOURNAL OF PLANT RESEARCH 2015; 128:37-47. [PMID: 25527904 DOI: 10.1007/s10265-014-0683-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/14/2014] [Indexed: 05/03/2023]
Abstract
Plant viruses utilize plasmodesmata (PD), unique membrane-lined cytoplasmic nanobridges in plants, to spread infection cell-to-cell and long-distance. Such invasion involves a range of regulatory mechanisms to target and modify PD. Exciting discoveries in this field suggest that these mechanisms are executed by the interaction between plant cellular components and viral movement proteins (MPs) or other virus-encoded factors. Striking working analogies exist among endogenous non-cell-autonomous proteins and viral MPs, in which not only do they all use PD to traffic, but also they exploit same regulatory components to exert their functions. Thus, this review discusses on the viral strategies to move via PD and the PD-regulatory mechanisms involved in viral pathogenesis.
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Affiliation(s)
- Dhinesh Kumar
- Division of Applied Life Science (BK21plus), Department of Biochemistry, Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 27-306, 501 Jinju-Daero, Jinju, 660-701, Korea
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Rossi M, Vallino M, Abbà S, Ciuffo M, Balestrini R, Genre A, Turina M. The Importance of the KR-Rich Region of the Coat Protein of Ourmia melon virus for Host Specificity, Tissue Tropism, and Interference With Antiviral Defense. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2015; 28:30-41. [PMID: 25494356 DOI: 10.1094/mpmi-07-14-0197-r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The N-terminal region of the Ourmia melon virus (OuMV) coat protein (CP) contains a short lysine/arginine-rich (KR) region. By alanine scanning mutagenesis, we showed that the KR region influences pathogenicity and virulence of OuMV without altering viral particle assembly. A mutant, called OuMV6710, with three basic residue substitutions in the KR region, was impaired in the ability to maintain the initial systemic infection in Nicotiana benthamiana and to infect both cucumber and melon plants systemically. The integrity of this protein region was also crucial for encapsidation of viral genomic RNA; in fact, certain mutations within the KR region partially compromised the RNA encapsidation efficiency of the CP. In Arabidopsis thaliana Col-0, OuMV6710 was impaired in particle accumulation; however, this phenotype was abolished in dcl2/dcl4 and dcl2/dcl3/dcl4 Arabidopsis mutants defective for antiviral silencing. Moreover, in contrast to CPwt, in situ immunolocalization experiments indicated that CP6710 accumulates efficiently in the spongy mesophyll tissue of infected N. benthamiana and A. thaliana leaves but only occasionally infects palisade tissues. These results provided strong evidence of a crucial role for OuMV CP during viral infection and highlighted the relevance of the KR region in determining tissue tropism, host range, pathogenicity, and RNA affinity, which may be all correlated with a possible CP silencing-suppression activity.
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Gao L, Tuo D, Shen W, Yan P, Li X, Zhou P. NIa-Pro of Papaya ringspot virus interacts with Carica papaya eukaryotic translation initiation factor 3 subunit G (CpeIF3G). Virus Genes 2014; 50:97-103. [PMID: 25416301 DOI: 10.1007/s11262-014-1145-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 11/12/2014] [Indexed: 11/29/2022]
Abstract
The interaction of papaya eukaryotic translation initiation factor 3 subunit G (CpeIF3G) with Papaya ringspot virus (PRSV) NIa-Pro was validated using a bimolecular fluorescence complementation assay in papaya protoplasts based on the previous yeast two-hybrid assay results. The C-terminal (residues 133-239) fragment of PRSV NIa-Pro and the central domain (residues 59-167) of CpeIF3G were required for effective interaction between NIa-Pro and CpeIF3G as shown by a Sos recruitment yeast two-hybrid system with several deletion mutants of NIa-Pro and CpeIF3G. The central domain of CpeIF3G, which contains a C2HC-type zinc finger motif, is required to bind to other eIFs of the translational machinery. In addition, quantitative real-time reverse transcription PCR assay confirmed that PRSV infection leads to a 2- to 4.5-fold up-regulation of CpeIF3G mRNA in papaya. Plant eIF3G is involved in various stress response by enhancing the translation of resistance-related proteins. It is proposed that the NIa-Pro-CpeIF3G interaction may impair translation preinitiation complex assembly of defense proteins and interfere with host defense.
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Affiliation(s)
- Le Gao
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology & Analysis and Testing Center, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
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Groundnut bud necrosis virus encoded NSm associates with membranes via its C-terminal domain. PLoS One 2014; 9:e99370. [PMID: 24919116 PMCID: PMC4053438 DOI: 10.1371/journal.pone.0099370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 05/13/2014] [Indexed: 12/14/2022] Open
Abstract
Groundnut Bud Necrosis Virus (GBNV) is a tripartite ambisense RNA plant virus that belongs to serogroup IV of Tospovirus genus. Non-Structural protein-m (NSm), which functions as movement protein in tospoviruses, is encoded by the M RNA. In this communication, we demonstrate that despite the absence of any putative transmembrane domain, GBNV NSm associates with membranes when expressed in E. coli as well as in N. benthamiana. Incubation of refolded NSm with liposomes ranging in size from 200–250 nm resulted in changes in the secondary and tertiary structure of NSm. A similar behaviour was observed in the presence of anionic and zwitterionic detergents. Furthermore, the morphology of the liposomes was found to be modified in the presence of NSm. Deletion of coiled coil domain resulted in the inability of in planta expressed NSm to interact with membranes. Further, when the C-terminal coiled coil domain alone was expressed, it was found to be associated with membrane. These results demonstrate that NSm associates with membranes via the C-terminal coiled coil domain and such an association may be important for movement of viral RNA from cell to cell.
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Demmig-Adams B, Stewart JJ, Adams WW. Multiple feedbacks between chloroplast and whole plant in the context of plant adaptation and acclimation to the environment. Philos Trans R Soc Lond B Biol Sci 2014; 369:20130244. [PMID: 24591724 DOI: 10.1098/rstb.2013.0244] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This review focuses on feedback pathways that serve to match plant energy acquisition with plant energy utilization, and thereby aid in the optimization of chloroplast and whole-plant function in a given environment. First, the role of source-sink signalling in adjusting photosynthetic capacity (light harvesting, photochemistry and carbon fixation) to meet whole-plant carbohydrate demand is briefly reviewed. Contrasting overall outcomes, i.e. increased plant growth versus plant growth arrest, are described and related to respective contrasting environments that either do or do not present opportunities for plant growth. Next, new insights into chloroplast-generated oxidative signals, and their modulation by specific components of the chloroplast's photoprotective network, are reviewed with respect to their ability to block foliar phloem-loading complexes, and, thereby, affect both plant growth and plant biotic defences. Lastly, carbon export capacity is described as a newly identified tuning point that has been subjected to the evolution of differential responses in plant varieties (ecotypes) and species from different geographical origins with contrasting environmental challenges.
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Affiliation(s)
- Barbara Demmig-Adams
- Department of Ecology and Evolutionary Biology, University of Colorado, , Boulder, CO 80309-0334, USA
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Tatineni S, French R. The C-terminus of Wheat streak mosaic virus coat protein is involved in differential infection of wheat and maize through host-specific long-distance transport. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2014; 27:150-162. [PMID: 24111920 DOI: 10.1094/mpmi-09-13-0272-r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Viral determinants and mechanisms involved in extension of host range of monocot-infecting viruses are poorly understood. Viral coat proteins (CP) serve many functions in almost every aspect of the virus life cycle. The role of the C-terminal region of Wheat streak mosaic virus (WSMV) CP in virus biology was examined by mutating six negatively charged aspartic acid residues at positions 216, 289, 290, 326, 333, and 334. All of these amino acid residues are dispensable for virion assembly, and aspartic acid residues at positions 216, 333, and 334 are expendable for normal infection of wheat and maize. However, mutants D289N, D289A, D290A, DD289/290NA, and D326A exhibited slow cell-to-cell movement in wheat, which resulted in delayed onset of systemic infection, followed by a rapid recovery of genomic RNA accumulation and symptom development. Mutants D289N, D289A, and D326A inefficiently infected maize, eliciting milder symptoms, while D290A and DD289/290NA failed to infect systemically, suggesting that the C-terminus of CP is involved in differential infection of wheat and maize. Mutation of aspartic acid residues at amino acid positions 289, 290, and 326 severely debilitated virus ingress into the vascular system of maize but not wheat, suggesting that these amino acids facilitate expansion of WSMV host range through host-specific long-distance transport.
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Sasaya T, Nakazono-Nagaoka E, Saika H, Aoki H, Hiraguri A, Netsu O, Uehara-Ichiki T, Onuki M, Toki S, Saito K, Yatou O. Transgenic strategies to confer resistance against viruses in rice plants. Front Microbiol 2014; 4:409. [PMID: 24454308 PMCID: PMC3888933 DOI: 10.3389/fmicb.2013.00409] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 12/12/2013] [Indexed: 12/02/2022] Open
Abstract
Rice (Oryza sativa L.) is cultivated in more than 100 countries and supports nearly half of the world's population. Developing efficient methods to control rice viruses is thus an urgent necessity because viruses cause serious losses in rice yield. Most rice viruses are transmitted by insect vectors, notably planthoppers and leafhoppers. Viruliferous insect vectors can disperse their viruses over relatively long distances, and eradication of the viruses is very difficult once they become widespread. Exploitation of natural genetic sources of resistance is one of the most effective approaches to protect crops from virus infection; however, only a few naturally occurring rice genes confer resistance against rice viruses. Many investigators are using genetic engineering of rice plants as a potential strategy to control viral diseases. Using viral genes to confer pathogen-derived resistance against crops is a well-established procedure, and the expression of various viral gene products has proved to be effective in preventing or reducing infection by various plant viruses since the 1990s. RNA interference (RNAi), also known as RNA silencing, is one of the most efficient methods to confer resistance against plant viruses on their respective crops. In this article, we review the recent progress, mainly conducted by our research group, in transgenic strategies to confer resistance against tenuiviruses and reoviruses in rice plants. Our findings also illustrate that not all RNAi constructs against viral RNAs are equally effective in preventing virus infection and that it is important to identify the viral "Achilles' heel" gene to target for RNAi attack when engineering plants.
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Affiliation(s)
- Takahide Sasaya
- NARO Kyushu-Okinawa Agricultural Research CenterKoshi, Kumamoto, Japan
| | | | - Hiroaki Saika
- National Institute of Agrobiological SciencesTsukuba, Ibaraki, Japan
| | - Hideyuki Aoki
- Hokuriku Research Center, NARO Agricultural Research CenterJoetsu, Niigata, Japan
| | - Akihiro Hiraguri
- Graduate School of Agricultural and Life Sciences, The University of Tokyo BunkyoTokyo, Japan
| | - Osamu Netsu
- Graduate School of Agricultural and Life Sciences, The University of Tokyo BunkyoTokyo, Japan
| | | | - Masatoshi Onuki
- NARO Kyushu-Okinawa Agricultural Research CenterKoshi, Kumamoto, Japan
| | - Seichi Toki
- National Institute of Agrobiological SciencesTsukuba, Ibaraki, Japan
| | - Koji Saito
- Hokuriku Research Center, NARO Agricultural Research CenterJoetsu, Niigata, Japan
| | - Osamu Yatou
- Hokuriku Research Center, NARO Agricultural Research CenterJoetsu, Niigata, Japan
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Hyodo K, Kaido M, Okuno T. Host and viral RNA-binding proteins involved in membrane targeting, replication and intercellular movement of plant RNA virus genomes. FRONTIERS IN PLANT SCIENCE 2014; 5:321. [PMID: 25071804 PMCID: PMC4083346 DOI: 10.3389/fpls.2014.00321] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 06/18/2014] [Indexed: 05/10/2023]
Abstract
Many plant viruses have positive-strand RNA [(+)RNA] as their genome. Therefore, it is not surprising that RNA-binding proteins (RBPs) play important roles during (+)RNA virus infection in host plants. Increasing evidence demonstrates that viral and host RBPs play critical roles in multiple steps of the viral life cycle, including translation and replication of viral genomic RNAs, and their intra- and intercellular movement. Although studies focusing on the RNA-binding activities of viral and host proteins, and their associations with membrane targeting, and intercellular movement of viral genomes have been limited to a few viruses, these studies have provided important insights into the molecular mechanisms underlying the replication and movement of viral genomic RNAs. In this review, we briefly overview the currently defined roles of viral and host RBPs whose RNA-binding activity have been confirmed experimentally in association with their membrane targeting, and intercellular movement of plant RNA virus genomes.
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Affiliation(s)
| | | | - Tetsuro Okuno
- *Correspondence: Tetsuro Okuno, Laboratory of Plant Pathology, Graduate School of Agriculture, Kyoto University, Kitashirakawa, Sakyo-ku,Kyoto 606-8502, Japan e-mail:
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43
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Adams III WW, Cohu CM, Amiard V, Demmig-Adams B. Associations between the acclimation of phloem-cell wall ingrowths in minor veins and maximal photosynthesis rate. FRONTIERS IN PLANT SCIENCE 2014; 5:24. [PMID: 24567735 PMCID: PMC3915099 DOI: 10.3389/fpls.2014.00024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 01/21/2014] [Indexed: 05/22/2023]
Abstract
The companion cells (CCs) and/or phloem parenchyma cells (PCs) in foliar minor veins of some species exhibit invaginations that are amplified when plants develop in high light (HL) compared to low light (LL). Leaves of plants that develop under HL also exhibit greater maximal rates of photosynthesis compared to those that develop under LL, suggesting that the increased membrane area of CCs and PCs of HL-acclimated leaves may provide for greater levels of transport proteins facilitating enhanced sugar export. Furthermore, the degree of wall invagination in PCs (Arabidopsis thaliana) or CCs (pea) of fully expanded LL-acclimated leaves increased to the same level as that present in HL-acclimated leaves 7 days following transfer to HL, and maximal photosynthesis rates of transferred leaves of both species likewise increased to the same level as in HL-acclimated leaves. In contrast, transfer of Senecio vulgaris from LL to HL resulted in increased wall invagination in CCs, but not PCs, and such leaves furthermore exhibited only partial upregulation of photosynthetic capacity following LL to HL transfer. Moreover, a significant linear relationship existed between the level of cell wall ingrowths and maximal photosynthesis rates across all three species and growth light regimes. A positive linear relationship between these two parameters was also present for two ecotypes (Sweden, Italy) of the winter annual A. thaliana in response to growth at different temperatures, with significantly greater levels of PC wall ingrowths and higher rates of photosynthesis in leaves that developed at cooler versus warmer temperatures. Treatment of LL-acclimated plants with the stress hormone methyl jasmonate also resulted in increased levels of wall ingrowths in PCs of A. thaliana and S. vulgaris but not in CCs of pea and S. vulgaris. The possible role of PC wall ingrowths in sugar export versus as physical barriers to the movement of pathogens warrants further attention.
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Affiliation(s)
- William W. Adams III
- Department of Ecology and Evolutionary Biology, University of ColoradoBoulder, CO, USA
- *Correspondence: William W. Adams III, Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309-0334, USA e-mail:
| | - Christopher M. Cohu
- Department of Ecology and Evolutionary Biology, University of ColoradoBoulder, CO, USA
| | - Véronique Amiard
- Genomics and Bioinformatics Unit, Agriaquaculture Nutritional Genomic CenterTemuco, Chile
| | - Barbara Demmig-Adams
- Department of Ecology and Evolutionary Biology, University of ColoradoBoulder, CO, USA
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Chloroplast Photoprotection and the Trade-Off Between Abiotic and Biotic Defense. ADVANCES IN PHOTOSYNTHESIS AND RESPIRATION 2014. [DOI: 10.1007/978-94-017-9032-1_28] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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45
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López-López K, Rodríguez-Mora DM, Vaca-Vaca JC. Optimización de las condiciones de inoculación por biobalística de un Begomovirus en tomate y tabaco. REVISTA COLOMBIANA DE BIOTECNOLOGÍA 2013. [DOI: 10.15446/rev.colomb.biote.v15n2.41261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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46
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Spiegelman Z, Golan G, Wolf S. Don't kill the messenger: Long-distance trafficking of mRNA molecules. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2013; 213:1-8. [PMID: 24157202 DOI: 10.1016/j.plantsci.2013.08.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/29/2013] [Accepted: 08/30/2013] [Indexed: 05/22/2023]
Abstract
The phloem sap contains numerous macromolecules such as proteins and RNAs, in addition to photoassimilates, amino acids and other small molecules. The transcription profile of messenger RNA (mRNA) molecules in the sieve tubes is unique and does not reflect the transcript profile in the neighboring companion cells. This discovery suggests tight regulation on cell-to-cell movement of mRNA molecules from the companion cells into the sieve tube. Heterografting experiments and RNA-detection methods have provided unequivocal evidence for the trafficking of several specific mRNA molecules between distant organs. Detection of various plant transcripts in their respective plant parasites further confirms this long-distance movement. The finding that several of these trafficked transcripts are involved in the control of developmental processes as well as responses to growth substances or environmental cues has led to a new paradigm that mRNA molecules act as non-cell-autonomous signaling agents operating in the vascular system. Trafficking of these molecules creates a communication network between distant organs that is required for coordinated development of the whole plant under adverse conditions. The generality of this concept, however, is still under debate, because the raison d'être for long-distance movement of mRNA is not clear. In this review we discuss the identity and potential function of phloem-sap mRNA molecules, the factors facilitating RNA transport, and the rationale for their action as long-distance signaling agents in the control of developmental processes.
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Affiliation(s)
- Ziv Spiegelman
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture and the Otto Warburg Minerva Center for Agricultural Biotechnology, The Hebrew University of Jerusalem. The Robert H. Smith Faculty of Agriculture, Food and Environment, Rehovot, Israel
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Feng Z, Chen X, Bao Y, Dong J, Zhang Z, Tao X. Nucleocapsid of Tomato spotted wilt tospovirus forms mobile particles that traffic on an actin/endoplasmic reticulum network driven by myosin XI-K. THE NEW PHYTOLOGIST 2013; 200:1212-24. [PMID: 24032608 DOI: 10.1111/nph.12447] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 07/11/2013] [Indexed: 05/27/2023]
Abstract
A number of viral proteins from plant viruses, other than movement proteins, have been shown to traffic intracellularly along actin filaments and to be involved in viral infection. However, there has been no report that a viral capsid protein may traffic within a cell by utilizing the actin/endoplasmic reticulum (ER) network. We used Tomato spotted wilt tospovirus (TSWV) as a model virus to study the cell biological properties of a nucleocapsid (N) protein. We found that TSWV N protein was capable of forming highly motile cytoplasmic inclusions that moved along the ER and actin network. The disruption of actin filaments by latrunculin B, an actin-depolymerizing agent, almost stopped the intracellular movement of N inclusions, whereas treatment with a microtubule-depolymerizing reagent, oryzalin, did not. The over-expression of a myosin XI-K tail, functioning in a dominant-negative manner, completely halted the movement of N inclusions. Latrunculin B treatment strongly inhibited the formation of TSWV local lesions in Nicotiana tabacum cv Samsun NN and delayed systemic infection in N. benthamiana. Collectively, our findings provide the first evidence that the capsid protein of a plant virus has the novel property of intracellular trafficking. The findings add capsid protein as a new class of viral protein that traffics on the actin/ER system.
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Affiliation(s)
- Zhike Feng
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
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Huang YP, Chen JS, Hsu YH, Tsai CH. A putative Rab-GTPase activation protein from Nicotiana benthamiana is important for Bamboo mosaic virus intercellular movement. Virology 2013; 447:292-9. [PMID: 24210126 DOI: 10.1016/j.virol.2013.09.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 08/03/2013] [Accepted: 09/21/2013] [Indexed: 12/31/2022]
Abstract
The cDNA-amplified fragment length polymorphism technique was applied to isolate the differentially expressed genes during Bamboo mosaic virus (BaMV) infection on Nicotiana benthamiana plants. One of the upregulated genes was cloned and predicted to contain a TBC domain designated as NbRabGAP1 (Rab GTPase activation protein 1). No significant difference was observed in BaMV accumulation in the NbRabGAP1-knockdown and the control protoplasts. However, BaMV accumulation was 50% and 2% in the inoculated and systemic leaves, respectively, of the knockdown plants to those of the control plants. By measuring the spreading area of BaMV infection foci in the inoculated leaves, we found that BaMV moved less efficiently in the NbRabGAP1-knockdown plants than in the control plants. Transient expression of the wild type NbRabGAP1 significantly increases BaMV accumulation in N. benthamiana. These results suggest that NbRabGAP1 with a functional Rab-GAP activity is involved in virus movement.
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Affiliation(s)
- Ying-Ping Huang
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 402, Taiwan
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49
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Mann K, Meng B. The triple gene block movement proteins of a grape virus in the genus Foveavirus confer limited cell-to-cell spread of a mutant Potato virus X. Virus Genes 2013; 47:93-104. [PMID: 23543158 DOI: 10.1007/s11262-013-0908-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 03/18/2013] [Indexed: 11/29/2022]
Abstract
Grapevine rupestris stem pitting-associated virus (GRSPaV) is a member of the genus Foveavirus in the family Betaflexiviridae. The genome of GRSPaV encodes five proteins, among which are three movement proteins designated the triple gene block (TGB) proteins. The TGB proteins of GRSPaV are highly similar to their counterparts in Potato virus X (PVX), as reflected in size, modular structure, conservation of critical amino acid sequence motifs, as well as similar cellular localization. Based on these similarities, we predicted that the TGB proteins of these two viruses would be interchangeable. To test this hypothesis, we replaced the entire or partial sequence of PVX TGB with the corresponding regions from GRSPaV, creating chimeric viruses that contain the PVX backbone and different sequences from GRSPaV TGB. These chimeric constructs were delivered into plants of Nicotiana benthamiana through agro-infiltration to test whether they were capable of cell-to-cell and systemic movement. To our surprise, viruses derived from pPVX.GFP(CH3) bearing GRSPaV TGB in place of PVX TGB lost the ability to move either cell-to-cell or systemically. Interestingly, another chimeric virus resulting from pPVX.GFP(HY2) containing four TGB genes (TGB1 from PVX and TGB1-3 from GRSPaV), exhibited limited cell-to-cell, but not systemic, movement. Our data question the notion that analogous movement proteins encoded by even distantly related viruses are functionally interchangeable and can be replaced by each other. These data suggest that other factors, besides the TGB proteins, may be required for successful intercellular and/or systemic movement of progeny viruses. This is the first experimental demonstration that the GRSPaV TGB function as movement proteins in the context of a chimeric virus and that four TGB genes were required to support the intercellular movement of the chimeric virus.
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Affiliation(s)
- Krinpreet Mann
- Department of Molecular and Cellular Biology, University of Guelph, 50 Stone Road, Guelph, ON N1G 2W1, Canada
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50
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Agüero J, Vives MC, Velázquez K, Ruiz-Ruiz S, Juárez J, Navarro L, Moreno P, Guerri J. Citrus leaf blotch virus invades meristematic regions in Nicotiana benthamiana and citrus. MOLECULAR PLANT PATHOLOGY 2013; 14:610-6. [PMID: 23560714 PMCID: PMC6638833 DOI: 10.1111/mpp.12031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
To invade systemically host plants, viruses need to replicate in the infected cells, spread to neighbouring cells through plasmodesmata and move to distal parts of the plant via sieve tubes to start new infection foci. To monitor the infection of Nicotiana benthamiana plants by Citrus leaf blotch virus (CLBV), leaves were agroinoculated with an infectious cDNA clone of the CLBV genomic RNA expressing green fluorescent protein (GFP) under the transcriptional control of a duplicate promoter of the coat protein subgenomic RNA. Fluorescent spots first appeared in agroinfiltrated leaves 11-12 days after infiltration, indicating CLBV replication. Then, after entering the phloem vascular system, CLBV was unloaded in the upper parts of the plant and invaded all tissues, including flower organs and meristems. GFP fluorescence was not visible in citrus plants infected with CLBV-GFP. Therefore, to detect CLBV in meristematic regions, Mexican lime (Citrus aurantifolia) plants were graft inoculated with CLBV, with Citrus tristeza virus (CTV), a virus readily eliminated by shoot-tip grafting in vitro, or with both simultaneously. Although CLBV was detected by hybridization and real-time reverse transcription-polymerase chain reaction (RT-PCR) in 0.2-mm shoot tips in all CLBV-inoculated plants, CTV was not detected. These results explain the difficulty in eliminating CLBV by shoot-tip grafting in vitro.
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Affiliation(s)
- Jesús Agüero
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias-IVIA, Moncada, Valencia 46113, Spain
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