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Li D, Sujata S, Kang K, Pang H, Li Y, Hou C, Jelkmann W, Wu Y, Zhao L. Polysaccharide Peptide Treatment Eliminates Strawberry Viruses and Promotes Strawberry Plant Growth and Rooting in Tissue Culture Media. PLANT DISEASE 2024; 108:2027-2033. [PMID: 38319628 DOI: 10.1094/pdis-10-23-2226-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Based on our previous finding that polysaccharide peptide (PSP) has substantial antiviral activity, we cultured strawberry plants infected with strawberry mild yellow edge virus (SMYEV) or strawberry vein banding virus (SVBV) in Murashige and Skoog (MS) media supplemented with PSP to test its ability to eliminate these viruses. PSP not only improved the elimination of SMYEV and SVBV but also promoted the growth and rooting of strawberry plants in tissue culture. On the 45th day, the average height of the 'Ningyu' strawberry plants in the 1-mg/ml PSP treatment group was 1.91 cm, whereas that of the plants in the control group was 1.51 cm. After the same time point, the number of new leaves on the tissue culture media supplemented with 1 mg/ml and 500 μg/ml of PSP and without PSP were 4.92, 4.41, and 3.53, respectively. PSP also promoted strawberry rooting and significantly increased both the length and number of roots. In addition, after treatment with the 1-mg/ml PSP treatment in tissue culture for 45 days followed by meristem-shoot-tip culture, the elimination rates of SMYEV and SVBV in regenerated 'Ningyu' strawberry plants ranged from 60 to 100%. This study investigated the use of the antiviral agent PSP for virus elimination. PSP has a low production cost and thus has great application potential for virus elimination in crop plants.
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Affiliation(s)
- Danyang Li
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Shrestha Sujata
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Kun Kang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Hanyu Pang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yin Li
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Caiting Hou
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Wilhelm Jelkmann
- Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Fruit Crops and Viticulture, 69221 Dossenheim, Germany
| | - Yunfeng Wu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Lei Zhao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
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Yang C, Nguyen VA, Nulu NPC, Kalaipandian S, Beveridge FC, Biddle J, Young A, Adkins SW. Towards Pathogen-Free Coconut Germplasm Exchange. PLANTS (BASEL, SWITZERLAND) 2024; 13:1809. [PMID: 38999649 PMCID: PMC11244555 DOI: 10.3390/plants13131809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 06/18/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024]
Abstract
Coconut (Cocos nucifera L.) is an important palm species that serves as the mainstay of several industries and contributes to the livelihoods of millions of smallholder farmers. International exchange of coconut germplasm has been undertaken for several decades to facilitate the conservation of selected varieties within global genebanks and for the distribution to farmers and scientists. In vitro systems are a convenient and an efficient method for the exchange of coconut germplasm. However, it is possible that these tissue culture systems can transfer lethal pathogens causing a threat to the importing countries. In this review, the following topics are discussed: the major disease-causing agents of concern, the various tissues that could be used for coconut germplasm exchange, and the techniques available for the detection and elimination of disease-causing agents from various transmission systems. Additionally, the lack of clear, science-backed guidelines to facilitate the exchange of in vitro coconut materials is raised, along with recommendations for future studies to ensure the safe movement of coconut germplasm without biosecurity risks.
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Affiliation(s)
- Chongxi Yang
- School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia
| | - Van Anh Nguyen
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD 4072, Australia
| | | | - Sundaravelpandian Kalaipandian
- School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD 4072, Australia
- Department of Bioengineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha School of Engineering, Chennai 602105, India
| | - Fernanda Caro Beveridge
- School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia
| | - Julianne Biddle
- School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia
| | - Anthony Young
- School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia
| | - Steve W Adkins
- School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD 4072, Australia
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Abdalla N, Dobránszki J. Meta-Topolin as an Effective Benzyladenine Derivative to Improve the Multiplication Rate and Quality of In Vitro Axillary Shoots of Húsvéti Rozmaring Apple Scion. PLANTS (BASEL, SWITZERLAND) 2024; 13:1568. [PMID: 38891376 PMCID: PMC11174652 DOI: 10.3390/plants13111568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 06/03/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024]
Abstract
In vitro mass propagation of apple plants plays an important role in the rapid multiplication of genetically uniform, disease-free scions and rootstocks with desired traits. Successful micropropagation of apple using axillary shoot cultures is influenced by several factors, the most critical of which is the cytokinin included in the culture medium. The impact of medium composition from single added cytokinins on shoot proliferation of apple scion Húsvéti rozmaring cultured on agar-agar gelled Murashige and Skoog medium fortified with indole butyric acid and gibberellic acid was investigated. The optimum concentration for efficient shoot multiplication differs according to the type of cytokinin. The highest significant multiplication rate (5.40 shoots/explant) was achieved using 2.0 μM thidiazuron while the longest shoots (1.80 cm) were observed on the medium containing benzyladenine at a concentration of 2.0 μM. However, application of either thidiazuron or benzyladenine as cytokinin source in the medium resulted in shoots of low quality, such as stunted and thickened shoots with small leaves. In the case of benzyladenine riboside, the 8 μM concentration was the most effective in increasing the multiplication rate (4.76 shoots/explant) but caused thickened stem development with tiny leaves. In the present study, meta-topolin was shown to be the most effective cytokinin that could be applied to induce sufficient multiplication (3.28 shoots/explant) and high-quality shoots along with shoot lengths of 1.46 cm when it was applied at concentrations of 4 μM. However, kinetin was the least active cytokinin; it practically did not induce the development of new shoots. The superior cytokinin for in vitro axillary shoot development of apple scion Húsvéti rozmaring with high-quality shoots was the meta-topolin, but it may be different depending on the variety/genotype under study.
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Affiliation(s)
- Neama Abdalla
- Plant Biotechnology Department, Biotechnology Research Institute, National Research Centre, 33 El Buhouth St., Dokki, Giza 12622, Egypt
- Centre for Agricultural Genomics and Biotechnology, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, 4400 Nyíregyháza, Hungary
| | - Judit Dobránszki
- Centre for Agricultural Genomics and Biotechnology, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, 4400 Nyíregyháza, Hungary
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Vlasava NB, Michener DC, Kharytonchyk S, Cortés-Ortiz L. Co-Infection of Tobacco Rattle and Cycas Necrotic Stunt Viruses in Paeonia lactiflora: Detection Strategies, Potential Origins of Infection, and Implications for Paeonia Germplasm Conservation. Viruses 2024; 16:893. [PMID: 38932185 PMCID: PMC11209033 DOI: 10.3390/v16060893] [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: 04/30/2024] [Revised: 05/20/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Increasing reports of tobacco rattle virus (TRV) and cycas necrotic stunt virus (CNSV) in herbaceous Paeonia worldwide highlight the importance of conserving the genetic resources of this economically important ornamental and medicinal crop. The unknown origin(s) of infection, differential susceptibility of peony cultivars to these viruses, and elusive disease phenotypes for CNSV in peonies make early detection and management challenging. Here, we report the presence of TRV and CNSV in plants of the University of Michigan living peony collection in the United States and a molecular characterization of their strains. Using sequences of the TRV 194 K RNA polymerase gene, we confirmed TRV infections in seven symptomatic plants (1.07% of all plants in the collection). Using newly developed primers, we recovered sequences of the CNSV RdRp gene and the polyprotein 1 gene region from nine out of twelve samples analyzed, including three from symptomless plants. Four of the nine plants had TRV and CNSV co-infections and showed more severe disease symptoms than plants only infected with TRV. Phylogenetic analyses of isolates from the University of Michigan living peony collection and publicly available isolates point to multiple origins of TRV and CNSV infections in this collection. This is the first report of TRV/CNSV co-infection and of a symptomatic detection of CNSV on cultivated P. lactiflora.
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Affiliation(s)
- Nastassia B. Vlasava
- Matthaei Botanical Gardens and Nichols Arboretum, University of Michigan, Ann Arbor, MI 48105, USA;
- Central Botanical Garden, National Academy of Sciences of Belarus, 220012 Minsk, Belarus
| | - David C. Michener
- Matthaei Botanical Gardens and Nichols Arboretum, University of Michigan, Ann Arbor, MI 48105, USA;
| | - Siarhei Kharytonchyk
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA;
| | - Liliana Cortés-Ortiz
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA;
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Bettoni JC, Wang MR, Li JW, Fan X, Fazio G, Hurtado-Gonzales OP, Volk GM, Wang QC. Application of Biotechniques for In Vitro Virus and Viroid Elimination in Pome Fruit Crops. PHYTOPATHOLOGY 2024; 114:930-954. [PMID: 38408117 DOI: 10.1094/phyto-07-23-0232-kc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Sustainable production of pome fruit crops is dependent upon having virus-free planting materials. The production and distribution of plants derived from virus- and viroid-negative sources is necessary not only to control pome fruit viral diseases but also for sustainable breeding activities, as well as the safe movement of plant materials across borders. With variable success rates, different in vitro-based techniques, including shoot tip culture, micrografting, thermotherapy, chemotherapy, and shoot tip cryotherapy, have been employed to eliminate viruses from pome fruits. Higher pathogen eradication efficiencies have been achieved by combining two or more of these techniques. An accurate diagnosis that confirms complete viral elimination is crucial for developing effective management strategies. In recent years, considerable efforts have resulted in new reliable and efficient virus detection methods. This comprehensive review documents the development and recent advances in biotechnological methods that produce healthy pome fruit plants. [Formula: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Jean Carlos Bettoni
- Independent Researcher, 35 Brasil Correia Street, Videira, SC 89560510, Brazil
| | - Min-Rui Wang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
| | - Jing-Wei Li
- Institute of Vegetable Industry Technology Research, Guizhou University, Guiyang 550025, China
| | - Xudong Fan
- National Center for Eliminating Viruses from Deciduous Fruit Trees, Institute of Pomology of CAAS, Xingcheng 125100, China
| | - Gennaro Fazio
- U.S. Department of Agriculture-Agricultural Research Service Plant Genetic Resources Unit, Geneva, NY 14456, U.S.A
| | - Oscar P Hurtado-Gonzales
- U.S. Department of Agriculture-APHIS Plant Germplasm Quarantine Program, BARC-East, Beltsville, MD 20705, U.S.A
| | - Gayle M Volk
- U.S. Department of Agriculture-Agricultural Research Service National Laboratory for Genetic Resources Preservation, Fort Collins, CO 80521, U.S.A
| | - Qiao-Chun Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling 712100, China
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Feng M, Augstein F, Kareem A, Melnyk CW. Plant grafting: Molecular mechanisms and applications. MOLECULAR PLANT 2024; 17:75-91. [PMID: 38102831 DOI: 10.1016/j.molp.2023.12.006] [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: 10/09/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 12/17/2023]
Abstract
People have grafted plants since antiquity for propagation, to increase yields, and to improve stress tolerance. This cutting and joining of tissues activates an incredible regenerative ability as different plants fuse and grow as one. For over a hundred years, people have studied the scientific basis for how plants graft. Today, new techniques and a deepening knowledge of the molecular basis for graft formation have allowed a range of previously ungraftable combinations to emerge. Here, we review recent developments in our understanding of graft formation, including the attachment and vascular formation steps. We analyze why plants graft and how biotic and abiotic factors influence successful grafting. We also discuss the ability and inability of plants to graft, and how grafting has transformed both horticulture and fundamental plant science. As our knowledge about plant grafting improves, new combinations and techniques will emerge to allow an expanded use of grafting for horticultural applications and to address fundamental research questions.
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Affiliation(s)
- Ming Feng
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
| | - Frauke Augstein
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
| | - Abdul Kareem
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
| | - Charles W Melnyk
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden.
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Khan HA, Baig DI, Bhatti MF. An Overview of Mycoviral Curing Strategies Used in Evaluating Fungal Host Fitness. Mol Biotechnol 2023; 65:1547-1564. [PMID: 36841858 PMCID: PMC9963364 DOI: 10.1007/s12033-023-00695-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 02/11/2023] [Indexed: 02/27/2023]
Abstract
The number of novel mycoviruses is increasing at a high pace due to advancements in sequencing technologies. As a result, an uncountable number of mycoviral sequences are available in public sequence repositories. However, only genomic information is not sufficient to understand the impact of mycoviruses on their host biology. Biological characterization is required to determine the nature of mycoviruses (cryptic, hypervirulent, or hypovirulent) and to search for mycoviruses with biocontrol and therapeutic potential. Currently, no particular selective method is used as the gold standard against these mycoviral infections. Given the importance of curing, we present an overview of procedures used in preparation of isogenic lines, along with their benefits and drawbacks. We concluded that a combination of single-spore isolation and hyphal tipping is the best fit for preparation of isogenic lines. Furthermore, recent bioinformatic approaches should be introduced in the field of mycovirology to predict virus-specific antivirals to get robust results.
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Affiliation(s)
- Haris Ahmed Khan
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12, Islamabad, 44000 Pakistan
- Department of Biotechnology, University of Mianwali, Punjab, 42200 Pakistan
| | - Danish Ilyas Baig
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12, Islamabad, 44000 Pakistan
| | - Muhammad Faraz Bhatti
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), H-12, Islamabad, 44000 Pakistan
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Tarquini G, Dall'Ara M, Ermacora P, Ratti C. Traditional Approaches and Emerging Biotechnologies in Grapevine Virology. Viruses 2023; 15:v15040826. [PMID: 37112807 PMCID: PMC10142720 DOI: 10.3390/v15040826] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 04/29/2023] Open
Abstract
Environmental changes and global warming may promote the emergence of unknown viruses, whose spread is favored by the trade in plant products. Viruses represent a major threat to viticulture and the wine industry. Their management is challenging and mostly relies on prophylactic measures that are intended to prevent the introduction of viruses into vineyards. Besides the use of virus-free planting material, the employment of agrochemicals is a major strategy to prevent the spread of insect vectors in vineyards. According to the goal of the European Green Deal, a 50% decrease in the use of agrochemicals is expected before 2030. Thus, the development of alternative strategies that allow the sustainable control of viral diseases in vineyards is strongly needed. Here, we present a set of innovative biotechnological tools that have been developed to induce virus resistance in plants. From transgenesis to the still-debated genome editing technologies and RNAi-based strategies, this review discusses numerous illustrative studies that highlight the effectiveness of these promising tools for the management of viral infections in grapevine. Finally, the development of viral vectors from grapevine viruses is described, revealing their positive and unconventional roles, from targets to tools, in emerging biotechnologies.
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Affiliation(s)
- Giulia Tarquini
- Department of Agricultural, Environmental, Food and Animal Sciences (Di4A), University of Udine, 33100 Udine, Italy
| | - Mattia Dall'Ara
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, 40127 Bologna, Italy
| | - Paolo Ermacora
- Department of Agricultural, Environmental, Food and Animal Sciences (Di4A), University of Udine, 33100 Udine, Italy
| | - Claudio Ratti
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, 40127 Bologna, Italy
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Wang Y, Sun J, Wang J, Sujata S, Huang Q, Hou C, Wu Y, Zhao L. Efficient Elimination of Actinidia Chlorotic Ringspot-Associated Virus from Infected Kiwifruit Shoots Cultured In Vitro. PLANT DISEASE 2023; 107:34-37. [PMID: 35787011 DOI: 10.1094/pdis-05-22-1101-sc] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, methods of Actinidia chlorotic ringspot-associated virus (AcCRaV) elimination by shoot tip culture, thermotherapy followed by shoot tip culture, and chemotherapy followed by shoot tip culture were explored. The results showed that the AcCRaV elimination rate was 23.3% when the secondary shoot tip culture method was used and when the shoot tip length was less than 0.5 mm. The AcCRaV elimination rate was 100% when thermotherapy (36°C [day] and 32°C [night]) was applied for 20 days followed by shoot tip culture (shoot tip length less than 1.0 mm). When shoot segments were treated with ribavirin at 15 µg/ml for 2 months followed by shoot tip culture, the elimination rate of AcCRaV was 100% (shoot tip length less than 1.0 mm). When shoot segments were treated with ribavirin at 25 µg/ml for 2 months followed by shoot tip culture, the elimination rate of AcCRaV was 100% (shoot tip length less than 1.5 mm). This is the first report on kiwifruit virus elimination methods.
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Affiliation(s)
- Yicheng Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jiaxiu Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jingke Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Shrestha Sujata
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qianru Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Caiting Hou
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yunfeng Wu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Lei Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; and Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
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10
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Wang MR, Bi WL, Ren L, Zhang AL, Ma XY, Zhang D, Volk GM, Wang QC. Micrografting: An Old Dog Plays New Tricks in Obligate Plant Pathogens. PLANT DISEASE 2022; 106:2545-2557. [PMID: 35350886 DOI: 10.1094/pdis-03-22-0475-fe] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Micrografting, which was developed almost 50 years ago, has long been used for virus eradication, micropropagation, regeneration, rejuvenation, and graft compatibility. Recently, micrografting has been used for studies of long-distance trafficking and signaling of molecules between scions and rootstocks. The graft transmissiveness of obligate plant pathogens, such as viruses, viroids, and phytoplasmas, facilitated the use of micrografting to study biological indexing and pathogen transmission, pathogen-induced graft incompatibility, and screening for the pathogen resistance during the past 20 years. The present study provides comprehensive information on the latter subjects. Finally, prospects are proposed to direct further studies.
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Affiliation(s)
- Min-Rui Wang
- College of Life Science, State Key Laboratory of Crop Stress Biology for Arid Region, Yangling 712100, Shaanxi, P.R. China
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Wen-Lu Bi
- Department of Plant Agriculture, Gosling Research Institute for Plant Preservation, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Li Ren
- Institute for Agri-Food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, P.R. China
| | - A-Ling Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Xiao-Yan Ma
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Dong Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Gayle M Volk
- USDA-ARS National Laboratory for Genetic Resources Preservation, 1111 S. Mason Street, Fort Collins, CO 80521, U.S.A
| | - Qiao-Chun Wang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
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Ebrahimi M, Habashi AA, Emadpour M, Kazemi N. Recovery of virus-free Almond (Prunus dulcis) cultivars by somatic embryogenesis from meristem undergone thermotherapy. Sci Rep 2022; 12:14948. [PMID: 36056089 PMCID: PMC9440082 DOI: 10.1038/s41598-022-19269-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/26/2022] [Indexed: 01/06/2023] Open
Abstract
One of the world's main horticulture problems is the contamination of fruit trees with a variety of plant diseases, especially viral and pseudo-viral diseases. Due to the non-sexual propagation of the trees, these diseases have been transmitted to different parts of the world. The main aim of this study was to obtain a new effective method for virus elimination from almond cultivars, which was performed in two phases. In the first phase, we tested various almond cultivars with ELISA and RT-PCR. The results showed the infection of mother plantlets. So, three types of in vitro thermotherapy treatments were performed on infected plants to make them virus-free. The plantlets obtained from 0.5 mm meristem treated with the first type of thermotherapy (TH1: 8 h at 27 °C and 16 h at 38 °C for 18 days) showed the highest percentage of elimination of ApM, ACLS and TRS viruses. In the second phase, meristems were cultured on MS medium containing 0, 0.5, 1 and 2 mg/L 2,4-D with 1 mg/L TDZ and after two weeks, thermotherapy treatments were performed. The results showed, combining three methods of thermotherapy (TH1), meristem culture and somatic embryogenesis induction from meristem on MS medium supplemented with 0.5 mg/L 2,4-D and 1 mg/L TDZ is the most effective and safe technique for virus eradication without meristem size challenges. The samples that were diagnosed as virus-free were proliferated in temporary immersion bioreactor systems, and rooted to be used for later propagation and establishment of mother healthy orchards.
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Affiliation(s)
- Maryam Ebrahimi
- Department of Agricultural Biotechnology, Tarbiat Modares University, Tehran, Iran.
| | - Ali Akbar Habashi
- Agricultural Biotechnology Research Institute of Iran (ABRII), Karaj, Iran
| | - Masoumeh Emadpour
- Department of Agricultural Biotechnology, Tarbiat Modares University, Tehran, Iran
| | - Nooshin Kazemi
- Temperate Fruits Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
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12
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Impact of Thermotherapy on Regeneration of Single Node Setts of Sugarcane Infected by Sugarcane Yellow Leaf Virus. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.3.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Sugarcane is an important cash crop in India, as well as a key raw material in the production of sugar, jaggery, and bioethanol. Sugarcane yellow leaf disease incited by Sugarcane yellow leaf virus (SCYLV) is emerging as a major threat to sugarcane cultivation and the canes infected by SCYLV were found to be frequently invaded by fungal pathogens. SCYLV infected canes when used as seed material recorded low germination and seedling vigour. Hence, the present investigation was undertaken to test the efficacy of thermotherapy followed by carbendazim treatment for enhancing germination of SCYLV infected seed setts and seedling vigour. Single node setts of SCYLV infected canes were subjected to thermotherapy at 50°C, 51°C and 52°C for 10, 20 and 30 minutes in a hot water bath. Single node setts dipped in water or carbendazim (0.1%) solution served as control. Results of the study revealed that sett treatment with hot water at 50°C for 20 min followed by dipping in carbendazim (0.1%) solution for 30 minutes enhanced the sett germination and vigour of virus infected single noded setts. The presence of SCYLV in the seedlings that had emerged was determined using RT-PCR. The virus was found in germinated seedlings even after thermotherapy, suggesting that at the temperatures tested, thermotherapy was ineffective in eliminating the SCYLV sett borne inoculum. Thermotherapy and fungicide treatment, on the other hand, improved the germinability of infected single noded setts, probably due to a reduction in secondary fungal infection.
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13
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Cassava Frogskin Disease: Current Knowledge on a Re-Emerging Disease in the Americas. PLANTS 2022; 11:plants11141841. [PMID: 35890475 PMCID: PMC9318364 DOI: 10.3390/plants11141841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/17/2022]
Abstract
Cassava frogskin disease (CFSD) is a graft-transmissible disease of cassava reported for the first time in the 1970s, in Colombia. The disease is characterized by the formation of longitudinal lip-like fissures on the peel of the cassava storage roots and a progressive reduction in fresh weight and starch content. Since its first report, different pathogens have been identified in CFSD-affected plants and improved sequencing technologies have unraveled complex mixed infections building up in plants with severe root symptoms. The re-emergence of the disease in Colombia during 2019–2020 is again threatening the food security of low-income farmers and the growing local cassava starch industry. Here, we review some results obtained over several years of CFSD pathology research at CIAT, and provide insights on the biology of the disease coming from works on symptoms’ characterization, associated pathogens, means of transmission, carbohydrate accumulation, and management. We expect this work will contribute to a better understanding of the disease, which will reflect on lowering its impact in the Americas and minimize the risk of its spread elsewhere.
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14
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Virome of Grapevine Germplasm from the Anapa Ampelographic Collection (Russia). Viruses 2022; 14:v14061314. [PMID: 35746784 PMCID: PMC9230720 DOI: 10.3390/v14061314] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/07/2022] [Accepted: 06/13/2022] [Indexed: 11/16/2022] Open
Abstract
Grapevine germplasm collections are unique repositories of grape cultivars; therefore, it is necessary to minimize their infection with pathogens, including viruses, and develop various programs to maintain them in a virus-free state. In our study, we examined the virome of the largest Russian grapevine germplasm collection, the Anapa Ampelographic Collection, using high-throughput sequencing of total RNAs. As a result of bioinformatics analysis and validation of its results by reverse transcription PCR (RT-PCR) and quantitative RT-PCR (RT-qPCR), we identified 20 viruses and 3 viroids in 47 libraries. All samples were infected with 2 to 12 viruses and viroids, including those that cause economically significant diseases: leafroll, fleck, and rugose wood complex. For the first time in Russia, we detected Grapevine virus B (GVB), Grapevine virus F (GVF), Grapevine asteroid mosaic-associated virus (GAMaV), Grapevine Red Globe virus (GRGV), Grapevine satellite virus (GV-Sat), Grapevine virga-like virus (GVLV), Grapevine-associated jivivirus 1 (GaJV-1) and Vitis cryptic virus (VCV). A new putative representative of the genus Umbravirus with the provisional name Grapevine umbra-like virus (GULV) was also identified in Russian grape samples.
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15
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Zhao W, Wang L, Liu M, Zhang D, Andika IB, Zhu Y, Sun L. A Reduced Starch Level in Plants at Early Stages of Infection by Viruses Can Be Considered a Broad-Range Indicator of Virus Presence. Viruses 2022; 14:1176. [PMID: 35746648 PMCID: PMC9227243 DOI: 10.3390/v14061176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 02/05/2023] Open
Abstract
The diagnosis of virus infection can facilitate the effective control of plant viral diseases. To date, serological and molecular methods for the detection of virus infection have been widely used, but these methods have disadvantages if applied for broad-range and large-scale detection. Here, we investigated the effect of infection of several different plant RNA and DNA viruses such as cucumber mosaic virus (CMV), tobacco mosaic virus (TMV), potato virus X (PVX), potato virus Y (PVY) and apple geminivirus on starch content in leaves of Nicotiana benthamiana. Analysis showed that virus infection at an early stage was generally associated with a reduction in starch accumulation. Notably, a reduction in starch accumulation was readily apparent even with a very low virus accumulation detected by RT-PCR. Furthermore, we also observed that the infection of three latent viruses in propagative apple materials was associated with a reduction in starch accumulation levels. Analysis of transcriptional expression showed that some genes encoding enzymes involved in starch biosynthesis were downregulated at the early stage of CMV, TMV, PVX and PVY infections, suggesting that virus infection interferes with starch biosynthesis in plants. Our findings suggest that assessing starch accumulation levels potentially serve as a broad-range indicator for the presence of virus infection.
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Affiliation(s)
- Wanying Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Xianyang 712100, China; (W.Z.); (L.W.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310024, China
| | - Li Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Xianyang 712100, China; (W.Z.); (L.W.)
| | - Meizi Liu
- Yangling Sub-Center of National Center for Apple Improvement, College of Horticulture, Northwest A&F University, Yangling, Xianyang 712100, China; (M.L.); (D.Z.)
| | - Dong Zhang
- Yangling Sub-Center of National Center for Apple Improvement, College of Horticulture, Northwest A&F University, Yangling, Xianyang 712100, China; (M.L.); (D.Z.)
| | - Ida Bagus Andika
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China;
| | - Ying Zhu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310024, China
| | - Liying Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Xianyang 712100, China; (W.Z.); (L.W.)
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16
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Lai X, Wang H, Wu C, Zheng W, Leng J, Zhang Y, Yan L. Comparison of Potato Viromes Between Introduced and Indigenous Varieties. Front Microbiol 2022; 13:809780. [PMID: 35602024 PMCID: PMC9114672 DOI: 10.3389/fmicb.2022.809780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 04/12/2022] [Indexed: 11/16/2022] Open
Abstract
Viral disease in potatoes has been a major problem in potato production worldwide. In addition to the potential risk of introducing new diseases in new areas, viral-disease epidemics/pandemics can be initiated by “spillover” of indigenous viruses from infected alternative hosts into introduced cultivars. To investigate the tendency of potential viral infection/resistance, we analyzed the viromes of introduced and indigenous varieties of potatoes among different tissues using RNA-seq libraries. Bioinformatics analyses revealed that potato viruses PVM, PVY, and PVS were dominant and the most frequently identified viruses infecting potato virus-free plants in the field, and showed an infection bias between introduced and indigenous cultivars. PVY and PVS were the major viruses in introduced varieties, whereas PVM showed an extraordinarily high percentage in the indigenous variety. Other three common viruses, PVH, potato mop-top virus, and potato leafroll virus were identified specifically in the indigenous variety. There was a tendency for tissue-specific infection and sequence variation in viruses: underground parts (tubers, roots) harbored more unusual viruses, and tubers harbored relatively more variation with a high frequency of single nucleotide polymorphisms than other tissues. Taken together, our study provides a comprehensive overview of the composition, distribution, and sequence variation of viruses between introduced and indigenous varieties of potatoes.
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Affiliation(s)
- Xianjun Lai
- Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, College of Agricultural Science, Xichang University, Xichang, China
| | - Haiyan Wang
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, College of Life Sciences, Sichuan University, Chengdu, China
| | - Caiyun Wu
- Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, College of Agricultural Science, Xichang University, Xichang, China
| | - Wen Zheng
- Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, College of Agricultural Science, Xichang University, Xichang, China
| | - Jing Leng
- Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, College of Agricultural Science, Xichang University, Xichang, China
| | - Yizheng Zhang
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, College of Life Sciences, Sichuan University, Chengdu, China
| | - Lang Yan
- Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, College of Agricultural Science, Xichang University, Xichang, China
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17
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Bettoni JC, Mathew L, Pathirana R, Wiedow C, Hunter DA, McLachlan A, Khan S, Tang J, Nadarajan J. Eradication of Potato Virus S, Potato Virus A, and Potato Virus M From Infected in vitro-Grown Potato Shoots Using in vitro Therapies. FRONTIERS IN PLANT SCIENCE 2022; 13:878733. [PMID: 35665190 PMCID: PMC9161163 DOI: 10.3389/fpls.2022.878733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
Certain viruses dramatically affect yield and quality of potatoes and have proved difficult to eradicate with current approaches. Here, we describe a reliable and efficient virus eradication method that is high throughput and more efficacious at producing virus-free potato plants than current reported methods. Thermotherapy, chemotherapy, and cryotherapy treatments were tested alone and in combination for ability to eradicate single and mixed Potato virus S (PVS), Potato virus A (PVA), and Potato virus M (PVM) infections from three potato cultivars. Chemotherapy treatments were undertaken on in vitro shoot segments for four weeks in culture medium supplemented with 100 mg L-1 ribavirin. Thermotherapy on in vitro shoot segments was applied for two weeks at 40°C (day) and 28°C (night) with a 16 h photoperiod. Plant vitrification solution 2 (PVS2) and cryotherapy treatments included a shoot tip preculture followed by exposure to PVS2 either without or with liquid nitrogen (LN, cryotherapy) treatment. The virus status of control and recovered plants following therapies was assessed in post-regeneration culture after 3 months and then retested in plants after they had been growing in a greenhouse for a further 3 months. Microtuber production was investigated using in vitro virus-free and virus-infected segments. We found that thermotherapy and cryotherapy (60 min PVS2 + LN) used alone were not effective in virus eradication, while chemotherapy was better but with variable efficacy (20-100%). The most effective result (70-100% virus eradication) was obtained by combining chemotherapy with cryotherapy, or by consecutive chemotherapy, combined chemotherapy and thermotherapy, then cryotherapy treatments irrespective of cultivar. Regrowth following the two best virus eradication treatments was similar ranging from 8.6 to 29% across the three cultivars. The importance of virus removal on yield was reflected in "Dunluce" free of PVS having higher numbers of microtubers and in "V500' free of PVS and PVA having a greater proportion of microtubers > 5 mm. Our improved procedure has potential for producing virus-free planting material for the potato industry. It could also underpin the global exchange of virus-free germplasm for conservation and breeding programs.
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Affiliation(s)
- Jean Carlos Bettoni
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
| | - Liya Mathew
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
| | - Ranjith Pathirana
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
| | - Claudia Wiedow
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
| | - Donald A. Hunter
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
| | - Andrew McLachlan
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
| | - Subuhi Khan
- Plant Health and Environment Laboratory, Ministry for Primary Industries, Auckland, New Zealand
| | - Joe Tang
- Plant Health and Environment Laboratory, Ministry for Primary Industries, Auckland, New Zealand
| | - Jayanthi Nadarajan
- The New Zealand Institute for Plant and Food Research Limited, Food Industry Science Centre, Palmerston North, New Zealand
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18
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Taglienti A, Donati L, Ferretti L, Tomassoli L, Sapienza F, Sabatino M, Di Massimo G, Fiorentino S, Vecchiarelli V, Nota P, Ragno R. In vivo Antiphytoviral Activity of Essential Oils and Hydrosols From Origanum vulgare, Thymus vulgaris, and Rosmarinus officinalis to Control Zucchini Yellow Mosaic Virus and Tomato Leaf Curl New Delhi Virus in Cucurbita pepo L. Front Microbiol 2022; 13:840893. [PMID: 35547120 PMCID: PMC9085358 DOI: 10.3389/fmicb.2022.840893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/15/2022] [Indexed: 11/20/2022] Open
Abstract
In the last decades, the interest in biological activity of natural compounds has been growing. In plant protection, essential oils have been reported to exhibit antiviral, antimycotic, and antiparasitic activities, and are regarded as promising for the formulation of safe antimicrobial agents. Attention has also been focused on hydrosols, the by-products of hydro-distillation of essential oils. Their production is easy, fast, and cheap, and they seem to arise less concern for human health than essential oils. Plant viruses represent a major concern for agricultural crops since no treatment compound is available for virus control. This work was aimed at evaluating the antiphytoviral effectiveness of treatments with three essential oils and corresponding hydrosols extracted from Origanum vulgare, Thymus vulgaris, and Rosmarinus officinalis on Cucurbita pepo plants infected by zucchini yellow mosaic virus or tomato leaf curl New Delhi virus. Treatments were applied either concurrently or after virus inoculation to ascertain an inhibition or curative activity, respectively. Symptoms were observed and samplings were performed weekly. Virus titer and expression levels of phenylalanine ammonia lyase gene (PAL) were measured on treated and untreated infected plants by real-time PCR. PAL gene plays an important role in plant defense response as it is involved in tolerance/resistance to phytopathogens. Results indicated that treatments were effective against tomato leaf curl New Delhi virus whether applied simultaneously with the inoculation or after. A major inhibition was observed with O. vulgare essential oil and hydrosol, resulting in 10–4-fold decrease of virus titer 3 weeks after treatment. Curative activity gave maximum results with all three essential oils and T. vulgaris and R. officinalis hydrosols, recording from 10–2-fold decrease to virus not detected 4 weeks after treatment. An induction of PAL gene expression was recorded at 12 d.p.i. and then was restored to the levels of untreated control. This allows to hypothesize an early plant defense response to virus infection, possibly boosted by treatments. Plant extracts’ composition was characterized by gas chromatography-mass spectrometry. Phenols were largely main components of O. vulgare and T. vulgaris extracts (carvacrol and thymol, respectively), while extracts from R. officinalis were based on monoterpene hydrocarbons (essential oil) and oxygenated monoterpenes (hydrosol).
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Affiliation(s)
- Anna Taglienti
- Research Centre for Plant Protection and Certification, Council for Agricultural Research and Economics, Rome, Italy
| | - Livia Donati
- Research Centre for Plant Protection and Certification, Council for Agricultural Research and Economics, Rome, Italy
| | - Luca Ferretti
- Research Centre for Plant Protection and Certification, Council for Agricultural Research and Economics, Rome, Italy
| | - Laura Tomassoli
- Research Centre for Plant Protection and Certification, Council for Agricultural Research and Economics, Rome, Italy
| | - Filippo Sapienza
- Department of Drug Chemistry and Technology, University "La Sapienza," Rome, Italy
| | - Manuela Sabatino
- Department of Drug Chemistry and Technology, University "La Sapienza," Rome, Italy
| | - Gaia Di Massimo
- Department of Drug Chemistry and Technology, University "La Sapienza," Rome, Italy
| | - Simona Fiorentino
- Centro Appenninico del Terminillo "Carlo Jucci," Perugia University, Rieti, Italy
| | - Valerio Vecchiarelli
- Centro Appenninico del Terminillo "Carlo Jucci," Perugia University, Rieti, Italy
| | - Paolo Nota
- Research Centre for Plant Protection and Certification, Council for Agricultural Research and Economics, Rome, Italy
| | - Rino Ragno
- Department of Drug Chemistry and Technology, University "La Sapienza," Rome, Italy
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19
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Cantabella D, Dolcet-Sanjuan R, Teixidó N. Using plant growth-promoting microorganisms (PGPMs) to improve plant development under in vitro culture conditions. PLANTA 2022; 255:117. [PMID: 35513731 DOI: 10.1007/s00425-022-03897-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
The use of beneficial microorganisms improves the performance of in vitro - cultured plants through the improvement of plant nutrition, the biological control of microbial pathogens or the production of phytohormones that promote plant growth and development. Plant in vitro culture techniques are highly useful to obtain significant amounts of true-to-type and disease-free plant materials. One of these techniques is clonal micropropagation which consists on the establishment of shoot tip cultures, shoot multiplication, in vitro rooting and acclimatization to ex vitro conditions. However, in some cases, the existence of recalcitrant genotypes, with a compromised multiplication and rooting ability, or the difficulties to overcome the overgrowth of endophytic contaminations might seriously limit its efficiency. In this sense, the establishment of beneficial interactions between plants and plant growth-promoting microorganisms (PGPMs) under in vitro culture conditions might represent a valuable approach to efficiently solve those restrictions. During the last years, significant evidence reporting the use of beneficial microorganisms to improve the yield of in vitro multiplication or rooting as well as their acclimatization to greenhouse or soil conditions have been provided. Most of these positive effects are strongly linked to the ability of these microorganisms to provide in vitro plants with nutrients such as nitrogen or phosphorous, to produce plant growth regulators, to control the growth of pathogens or to mitigate stress conditions. The culture of A. thaliana under aseptic conditions has provided high-quality knowledge on the root development signaling pathways, involving hormones, triggered in the presence of PGPMs. Overall, the present article offers a brief overview of the use of microorganisms to improve in vitro plant performance during the in vitro micropropagation stages, as well as the main mechanisms of plant growth promotion associated with these microorganisms.
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Affiliation(s)
- Daniel Cantabella
- IRTA Plant In Vitro Culture Laboratory, Fruticulture Programme, Lleida, Catalonia, Spain
- Postharvest Programme, IRTA Edifici Fruitcentre, Parc Científic I Tecnològic Agroalimentari de Lleida, 25003, Lleida, Catalonia, Spain
| | - Ramon Dolcet-Sanjuan
- IRTA Plant In Vitro Culture Laboratory, Fruticulture Programme, Lleida, Catalonia, Spain
| | - Neus Teixidó
- Postharvest Programme, IRTA Edifici Fruitcentre, Parc Científic I Tecnològic Agroalimentari de Lleida, 25003, Lleida, Catalonia, Spain.
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20
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A Review of Viruses Infecting Yam ( Dioscorea spp.). Viruses 2022; 14:v14040662. [PMID: 35458392 PMCID: PMC9033002 DOI: 10.3390/v14040662] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 03/19/2022] [Accepted: 03/21/2022] [Indexed: 02/06/2023] Open
Abstract
Yam is an important food staple for millions of people globally, particularly those in the developing countries of West Africa and the Pacific Islands. To sustain the growing population, yam production must be increased amidst the many biotic and abiotic stresses. Plant viruses are among the most detrimental of plant pathogens and have caused great losses of crop yield and quality, including those of yam. Knowledge and understanding of virus biology and ecology are important for the development of diagnostic tools and disease management strategies to combat the spread of yam-infecting viruses. This review aims to highlight current knowledge on key yam-infecting viruses by examining their characteristics, genetic diversity, disease symptoms, diagnostics, and elimination to provide a synopsis for consideration in developing diagnostic strategy and disease management for yam.
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21
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Bettoni JC, Fazio G, Carvalho Costa L, Hurtado-Gonzales OP, Rwahnih MA, Nedrow A, Volk GM. Thermotherapy Followed by Shoot Tip Cryotherapy Eradicates Latent Viruses and Apple Hammerhead Viroid from In Vitro Apple Rootstocks. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11050582. [PMID: 35270052 PMCID: PMC8912313 DOI: 10.3390/plants11050582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 05/06/2023]
Abstract
Virus and viroid-free apple rootstocks are necessary for large-scale nursery propagation of apple (Malus domestica) trees. Apple stem grooving virus (ASGV) and Apple chlorotic leaf spot virus (ACLSV) are among the most serious apple viruses that are prevalent in most apple growing regions. In addition to these viruses, a new infectious agent named Apple hammerhead viroid (AHVd) has been identified. We investigated whether thermotherapy or cryotherapy alone or a combination of both could effectively eradicate ACLSV, ASGV, and AHVd from in vitro cultures of four apple rootstocks developed in the Cornell-Geneva apple rootstock breeding program (CG 2034, CG 4213, CG 5257, and CG 6006). For thermotherapy treatments, in vitro plants were treated for four weeks at 36 °C (day) and 32 °C (night). Plant vitrification solution 2 (PVS2) and cryotherapy treatments included a shoot tip preculture in 2 M glycerol + 0.8 M sucrose for one day followed by exposure to PVS2 for 60 or 75 min at 22 °C, either without or with liquid nitrogen (LN, cryotherapy) exposure. Combinations of thermotherapy and PVS2/cryotherapy treatments were also performed. Following treatments, shoot tips were warmed, recovered on growth medium, transferred to the greenhouse, grown, placed in dormancy inducing conditions, and then grown again prior to sampling leaves for the presence of viruses and viroids. Overall, thermotherapy combined with cryotherapy treatment resulted in the highest percentage of virus- and viroid-free plants, suggesting great potential for producing virus- and viroid-free planting materials for the apple industry. Furthermore, it could also be a valuable tool to support the global exchange of apple germplasm.
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Affiliation(s)
- Jean Carlos Bettoni
- The New Zealand Institute for Plant and Food Research Limited, Batchelar Road, Palmerston North 4410, New Zealand
- Correspondence:
| | - Gennaro Fazio
- USDA-ARS Plant Genetic Resources Unit, 630 W. North Street, Geneva, NY 14456, USA; (G.F.); (A.N.)
| | - Larissa Carvalho Costa
- USDA-APHIS Plant Germplasm Quarantine Program, 9901 Powder Mill Road, Bldg 580, BARC-East, Beltsville, MD 20705, USA; (L.C.C.); (O.P.H.-G.)
| | - Oscar P. Hurtado-Gonzales
- USDA-APHIS Plant Germplasm Quarantine Program, 9901 Powder Mill Road, Bldg 580, BARC-East, Beltsville, MD 20705, USA; (L.C.C.); (O.P.H.-G.)
| | - Maher Al Rwahnih
- Department of Plant Pathology, University of California-Davis, Davis, CA 95616, USA;
| | - Abby Nedrow
- USDA-ARS Plant Genetic Resources Unit, 630 W. North Street, Geneva, NY 14456, USA; (G.F.); (A.N.)
| | - Gayle M. Volk
- USDA-ARS National Laboratory for Genetic Resources Preservation, 1111 S. Mason Street, Fort Collins, CO 80521, USA;
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22
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Oberemok V, Laikova K, Golovkin I, Kryukov L, Kamenetsky-Goldstein R. Biotechnology of virus eradication and plant vaccination in phytobiome context. PLANT BIOLOGY (STUTTGART, GERMANY) 2022; 24:3-8. [PMID: 34569131 DOI: 10.1111/plb.13338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
A plant's associated biota plays an integral role in its metabolism, nutrient uptake, stress tolerance, pathogen resistance and other physiological processes. Although a virome is an integral part of the phytobiome, a major contradiction exists between the holobiont approach and the practical need to eradicate pathogens from agricultural crops. In this review, we discuss grapevine virus control, but the issue is also relevant for numerous other crops, including potato, cassava, citrus, cacao and other species. Grapevine diseases, especially viral infections, cause main crop losses. Methods have been developed to eliminate viruses and other microorganisms from plant material, but elimination of viruses from plant material does not guarantee protection from future reinfection. Elimination of viral particles in plant material could create genetic drift, leading in turn to an increase in the occurrence of pathogenic strains of viruses. A possible solution may be a combination of virus elimination and plant propagation in tissue culture with in vitro vaccination. In this context, possible strategies to control viral infections include application of plant resistance inducers, cross protection and vaccination using siRNA, dsRNA and viral replicons during plant 'cleaning' and in vitro propagation. The experience and knowledge accumulated in human immunization can help plant scientists to develop and employ new methods of protection, leading to more sustainable and healthier crop production.
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Affiliation(s)
- V Oberemok
- V.I. Vernadsky Crimean Federal University, Simferopol, Russia
- Nikita Botanical Gardens - National Scientific Centre Russian Academy of Sciences, Yalta, Russia
| | - K Laikova
- V.I. Vernadsky Crimean Federal University, Simferopol, Russia
- Research Institute of Agriculture of Crimea, Simferopol, Russia
| | - I Golovkin
- V.I. Vernadsky Crimean Federal University, Simferopol, Russia
| | - L Kryukov
- V.I. Vernadsky Crimean Federal University, Simferopol, Russia
- Lobachevsky State University of Nizhni Novgorod, Nizhni Novgorod, Russia
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23
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Grapevine Shoot Tip Cryopreservation and Cryotherapy: Secure Storage of Disease-Free Plants. PLANTS 2021; 10:plants10102190. [PMID: 34685999 PMCID: PMC8541583 DOI: 10.3390/plants10102190] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 11/27/2022]
Abstract
Grapevine (Vitis spp.) is one of the most economically important temperate fruit crops. Grapevine breeding programs require access to high-quality Vitis cultivars and wild species, which may be maintained within genebanks. Shoot tip cryopreservation is a valuable technique for the safe, long-term conservation of Vitis genetic resources that complements traditional field and in vitro germplasm collections. Vitis is highly susceptible to virus infections. Virus-free plants are required as propagation material for clonally propagated germplasm, and also for the global exchange of grapevine genetic resources. Shoot tip cryotherapy, a method based on cryopreservation, has proven to be effective in eradicating viruses from infected plants, including grapevine. This comprehensive review outlines/documents the advances in Vitis shoot tip cryopreservation and cryotherapy that have resulted in healthy plants with high regrowth levels across diverse Vitis species.
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Magyar-Tábori K, Mendler-Drienyovszki N, Hanász A, Zsombik L, Dobránszki J. Phytotoxicity and Other Adverse Effects on the In Vitro Shoot Cultures Caused by Virus Elimination Treatments: Reasons and Solutions. PLANTS 2021; 10:plants10040670. [PMID: 33807286 PMCID: PMC8066107 DOI: 10.3390/plants10040670] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/12/2021] [Accepted: 03/22/2021] [Indexed: 12/19/2022]
Abstract
In general, in vitro virus elimination is based on the culture of isolated meristem, and in addition thermotherapy, chemotherapy, electrotherapy, and cryotherapy can also be applied. During these processes, plantlets suffer several stresses, which can result in low rate of survival, inhibited growth, incomplete development, or abnormal morphology. Even though the in vitro cultures survive the treatment, further development can be inhibited; thus, regeneration capacity of treated in vitro shoots or explants play also an important role in successful virus elimination. Sensitivity of genotypes to treatments is very different, and the rate of destruction largely depends on the physiological condition of plants as well. Exposure time of treatments affects the rate of damage in almost every therapy. Other factors such as temperature, illumination (thermotherapy), type and concentration of applied chemicals (chemo- and cryotherapy), and electric current intensity (electrotherapy) also may have a great impact on the rate of damage. However, there are several ways to decrease the harmful effect of treatments. This review summarizes the harmful effects of virus elimination treatments applied on tissue cultures reported in the literature. The aim of this review is to expound the solutions that can be used to mitigate phytotoxic and other adverse effects in practice.
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Affiliation(s)
- Katalin Magyar-Tábori
- Centre for Agricultural Genomics and Biotechnology, Faculty of the Agricultural and Food Science and Environmental Management, University of Debrecen, P.O. Box 12, H-4400 Nyíregyháza, Hungary;
- Correspondence:
| | - Nóra Mendler-Drienyovszki
- Research Institute of Nyíregyháza, Institutes for Agricultural Research and Educational Farm (IAREF), University of Debrecen, P.O. Box 12, H-4400 Nyíregyháza, Hungary; (N.M.-D.); (L.Z.)
| | - Alexandra Hanász
- Kerpely Kálmán Doctoral School of Crop Production and Horticultural Sciences, University of Debrecen, Böszörményi Str. 138, H-4032 Debrecen, Hungary;
| | - László Zsombik
- Research Institute of Nyíregyháza, Institutes for Agricultural Research and Educational Farm (IAREF), University of Debrecen, P.O. Box 12, H-4400 Nyíregyháza, Hungary; (N.M.-D.); (L.Z.)
| | - Judit Dobránszki
- Centre for Agricultural Genomics and Biotechnology, Faculty of the Agricultural and Food Science and Environmental Management, University of Debrecen, P.O. Box 12, H-4400 Nyíregyháza, Hungary;
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Mancilla-Galindo J, Galindo-Sevilla N. Exploring the rationale for thermotherapy in COVID-19. Int J Hyperthermia 2021; 38:202-212. [PMID: 33682604 DOI: 10.1080/02656736.2021.1883127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Increased transmissibility of the pandemic severe acute respiratory coronavirus 2 (SARS-CoV-2) has been noted to occur at lower ambient temperatures. This is seemingly related to a better replication of most respiratory viruses, including SARS-CoV-2, at lower-than-core body temperatures (i.e., 33 °C vs 37 °C). Also, intrinsic characteristics of SARS-CoV-2 make it a heat-susceptible pathogen. Thermotherapy has successfully been used to combat viral infections in plants which could otherwise result in great economic losses; 90% of viruses causing infections in plants are positive-sense single-stranded ribonucleic acid (+ssRNA) viruses, a characteristic shared by SARS-CoV-2. Thus, it is possible to envision the use of heat-based interventions (thermotherapy or mild-temperature hyperthermia) in patients with COVID-19 for which moderate cycles (every 8-12 h) of mild-temperature hyperthermia (1-2 h) have been proposed. However, there are potential safety and mechanistic concerns which could limit the use of thermotherapy only to patients with mild-to-moderate COVID-19 to prevent disease progression rather than to treat patients who have already progressed to severe-to-critical COVID-19. Here, we review the characteristics of SARS-CoV-2 which make it a heat-susceptible virus, potential host mechanisms which could be enhanced at higher temperatures to aid viral clearance, and how thermotherapy could be investigated as a modality of treatment in patients with COVID-19 while taking into consideration potential risks.
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Affiliation(s)
- Javier Mancilla-Galindo
- Facultad de Medicina, División de Investigación, Unidad de Investigación UNAM-INC, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Norma Galindo-Sevilla
- Departamento de Infectología e Inmunología, Instituto Nacional de Perinatología, Mexico City, Mexico
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Tortella GR, Rubilar O, Diez MC, Padrão J, Zille A, Pieretti JC, Seabra AB. Advanced Material Against Human (Including Covid-19) and Plant Viruses: Nanoparticles As a Feasible Strategy. GLOBAL CHALLENGES (HOBOKEN, NJ) 2021; 5:2000049. [PMID: 33614127 PMCID: PMC7883180 DOI: 10.1002/gch2.202000049] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 11/06/2020] [Indexed: 05/03/2023]
Abstract
The SARS-CoV-2 virus outbreak revealed that these nano-pathogens have the ability to rapidly change lives. Undoubtedly, SARS-CoV-2 as well as other viruses can cause important global impacts, affecting public health, as well as, socioeconomic development. But viruses are not only a public health concern, they are also a problem in agriculture. The current treatments are often ineffective, are prone to develop resistance, or cause considerable adverse side effects. The use of nanotechnology has played an important role to combat viral diseases. In this review three main aspects are in focus: first, the potential use of nanoparticles as carriers for drug delivery. Second, its use for treatments of some human viral diseases, and third, its application as antivirals in plants. With these three themes, the aim is to give to readers an overview of the progress in this promising area of biotechnology during the 2017-2020 period, and to provide a glance at how tangible is the effectiveness of nanotechnology against viruses. Future prospects are also discussed. It is hoped that this review can be a contribution to general knowledge for both specialized and non-specialized readers, allowing a better knowledge of this interesting topic.
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Affiliation(s)
- Gonzalo R. Tortella
- Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio AmbienteCIBAMA‐BIORENUniversidad de La FronteraTemuco4811230Chile
| | - Olga Rubilar
- Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio AmbienteCIBAMA‐BIORENUniversidad de La FronteraTemuco4811230Chile
- Chemical Engineering DepartmentUniversidad de La FronteraTemuco4811230Chile
| | - María Cristina Diez
- Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio AmbienteCIBAMA‐BIORENUniversidad de La FronteraTemuco4811230Chile
- Chemical Engineering DepartmentUniversidad de La FronteraTemuco4811230Chile
| | - Jorge Padrão
- Centre for Textile Science and Technology (2C2T)University of MinhoGuimarães4800‐058Portugal
| | - Andrea Zille
- Centre for Textile Science and Technology (2C2T)University of MinhoGuimarães4800‐058Portugal
| | - Joana C. Pieretti
- Center for Natural and Human SciencesUniversidade Federal d ABC (UFABC)Santo André09210‐580Brazil
| | - Amedea B. Seabra
- Center for Natural and Human SciencesUniversidade Federal d ABC (UFABC)Santo André09210‐580Brazil
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Kim Y, Kim YJ, Paek KH. Temperature-specific vsiRNA confers RNAi-mediated viral resistance at elevated temperature in Capsicum annuum. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1432-1448. [PMID: 33165515 DOI: 10.1093/jxb/eraa527] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/02/2020] [Indexed: 05/12/2023]
Abstract
Resistance (R) gene-mediated resistance is a robust and efficient antiviral immune system in the plants. Thus, when R-mediated resistance was suppressed at elevated temperatures, resistance towards viruses was expected to be completely collapsed. Nonetheless, the multiplication of Tobacco mosaic virus pathotype P0 (TMV-P0) was inhibited, and TMV-P0 particles were only occasionally present in the systemic leaves of pepper plants (Capsicum annuum). RNAi-mediated RNA silencing is a well-known antiviral immune mechanism. At elevated temperatures, RNAi-mediated antiviral resistance was induced and virus-derived siRNAs (vsiRNAs) were dramatically increased. Through sRNA-sequencing (sRNA-Seq) analysis, we revealed that vsiRNAs derived from TMV-P0 were greatly increased. Intriguingly, virus-infected plants could select the temperature-specific vsiRNAs for antiviral resistance from the amplified vsiRNAs at elevated temperatures. Pre-application of these temperature-specific vsiRNAs endowed antiviral resistance of the plants. Therefore, plants sustain antiviral resistance by activating RNAi-mediated resistance, based on temperature-specific vsiRNAs at elevated temperatures.
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Affiliation(s)
- Yunsik Kim
- Department of Life Sciences, Korea University, Seoul, Republic of Korea
| | - Young Jin Kim
- Department of Life Sciences, Korea University, Seoul, Republic of Korea
| | - Kyung-Hee Paek
- Department of Life Sciences, Korea University, Seoul, Republic of Korea
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HTS-Based Monitoring of the Efficiency of Somatic Embryogenesis and Meristem Cultures Used for Virus Elimination in Grapevine. PLANTS 2020; 9:plants9121782. [PMID: 33339181 PMCID: PMC7765609 DOI: 10.3390/plants9121782] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/12/2020] [Accepted: 12/14/2020] [Indexed: 11/17/2022]
Abstract
Meristem culture and somatic embryogenesis are effective tools for virus elimination of vegetatively propagated crops including grapevine (Vitis vinifera L.). While both have been shown to be useful to eliminate the main grapevine viruses, their efficiency differs depending on the virus and grapevine variety. In our work, we investigated the efficiency of these two virus elimination methods using small RNA high-throughput sequencing (HTS) and RT-PCR as virus diagnostics. Field grown mother plants of four clones representing three cultivars, infected with different viruses and viroids, were selected for elimination via somatic embryogenesis (SE) and meristem culture (ME). Our results show for the first time that using SE, elimination in mother plants was effective for all viruses, i.e., grapevine rupestris vein feathering virus (GRVFV), grapevine Syrah virus 1 (GSyV-1), Grapevine virus T (GVT) and grapevine Pinot gris virus (GPGV). This study also confirms previous studies showing that SE is a possible strategy for the elimination of GFkV, GRSPaV, HSVd, and GYSVd-1. Our results demonstrate that the efficacy of virus elimination via SE is relatively high while the purging of viroids is lower. Our work provides evidence that the efficiency of SE is comparable to that of the technically difficult ME technique, and that SE will offer a more effective strategy for the production of virus-free grapevine in the future.
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Wilms H, Fanega Sleziak N, Van der Auweraer M, Brands M, Verleije M, Hardeman D, Andre E, Panis B. Development of a fast and user-friendly cryopreservation protocol for sweet potato genetic resources. Sci Rep 2020; 10:14674. [PMID: 32895398 PMCID: PMC7477159 DOI: 10.1038/s41598-020-70869-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/13/2020] [Indexed: 11/10/2022] Open
Abstract
Sweet potato (Ipomoea batatas) is one of the ten most important staple crops and provides a livelihood for many people around the globe. To adapt to ever-changing circumstances farmers and breeders need to have access to a broad diversity of germplasm. This study focuses on the development of a cryopreservation protocol that allows the long term storage of different sweet potato cultivars. For this, a droplet vitrification protocol was optimized, comparing several parameters; preculture method (0.3 M sucrose vs no preculture); meristem position (axillary vs apical); plant age (3 to 9 weeks); regeneration medium (MS + 2.22 µM BA, Hirai and MS); and length of loading solution treatment (20 to 360 min). Two months after cryopreservation, the regeneration rates of the meristems were compared, which resulted in significant differences for the preculture method, meristem position and loading solution. With these new insights an optimized droplet vitrification protocol was developed with the following parameters: use of 3-9 week old axillary meristems, no preculture phase, 20 min LS treatment, 30 min PVS2 treatment, exposure to liquid nitrogen by droplet vitrification, warming treatment in RS for 15 min, 1 day 0.3 M sucrose recuperation culture, 1 month MS + 2.22 µM BA followed by 1 month of MS cultures. This protocol was subsequently tested on 10 representative accessions resulting in a post cryopreservation regeneration rate of more than 40% for 70% of the tested cultivars, showing that this protocol could be implemented for a large portion of existing sweet potato collections.
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Affiliation(s)
- Hannes Wilms
- Dept. Biosystems, Laboratory of Tropical Crop Improvement, KU Leuven, 3001, Leuven, Belgium.
| | | | | | - Martijn Brands
- Dept. Biosystems, Laboratory of Tropical Crop Improvement, KU Leuven, 3001, Leuven, Belgium
| | - Matthijs Verleije
- Dept. Biosystems, Laboratory of Tropical Crop Improvement, KU Leuven, 3001, Leuven, Belgium
| | - Dirk Hardeman
- Dept. Biosystems, Laboratory of Tropical Crop Improvement, KU Leuven, 3001, Leuven, Belgium
| | - Edwige Andre
- Dept. Biosystems, Laboratory of Tropical Crop Improvement, KU Leuven, 3001, Leuven, Belgium
| | - Bart Panis
- Dept. Biosystems, Laboratory of Tropical Crop Improvement, KU Leuven, 3001, Leuven, Belgium
- Bioversity International, Belgian Office at KU Leuven, 3001, Leuven, Belgium
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Cryobiotechnology of Plants: A Hot Topic Not Only for Gene Banks. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10134677] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Agriculture has always been an important part of human evolution. Traditionally, farming is changing and developing with regard to challenges it faces. The major challenges of modern agriculture are food and nutrition safety for the growing world population. Promoting species and genetic diversity in agriculture appears to be an important approach to dealing with those challenges. Gene banks all around the world play a crucial role in preserving plant genetic resources for future crop improvements. The plant germplasm can be preserved in different ways, depending on the species or form of stored plant tissue. This review focuses on a special preservation method—cryopreservation. Cryopreservation is an effective technique for storing living systems at ultra-low temperatures, usually in liquid nitrogen or its vapor phase. This conservation method is crucial for plants that do not produce seeds or that produce non germinating seeds, as well as for plants that propagate vegetatively. Moreover, based on the cryopreservation method, a novel plant biotechnology tool for pathogen eradication called cryotherapy has been developed. The use of liquid nitrogen eliminates plant pathogens such as viruses, phytoplasmas, and bacteria. Our article reviews recent advances in cryo-biotechnologies such as cryopreservation and cryotherapy, with special focus on studies concerning fruit plants.
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Abril S, Jurvansuu J. Season- and caste-specific variation in RNA viruses in the invasive Argentine ant European supercolony. J Gen Virol 2020; 101:322-333. [PMID: 31985392 DOI: 10.1099/jgv.0.001384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The Argentine ant (Linepithema humile, Mayr) is a highly invasive species. Recently, several RNA viruses have been identified in samples from invasive Argentine ant colonies. Using quantitative PCR, we investigated variation in the levels of these viruses in the main European supercolony over the course of a year. We discovered that virus prevalence and amounts of viral RNA were affected by season and caste: ants had more virus types during warm versus cold months, and queens had more virus types and higher virus prevalence than did workers or males. This seasonal variation was largely due to the appearance of positive-strand RNA viruses in the summer and their subsequent disappearance in the winter. The prevalences of positive-strand RNA viruses were positively correlated with worker foraging activity. We hypothesise that during warmer months, ants are more active and more numerous and, as a result, they have more conspecific and heterospecific interactions that promote virus transmission.
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Affiliation(s)
- Sílvia Abril
- Department of Environmental Sciences, University of Girona, Girona, Spain
| | - Jaana Jurvansuu
- Department of Ecology and Genetics, University of Oulu, Oulu, Finland
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Klimenko V, Pavlova I, Volodin V, Gorislavets S. Production of diseases - free plant materials of grapevine from phytoplasma in vitro. BIO WEB OF CONFERENCES 2020. [DOI: 10.1051/bioconf/20202505004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Heat treatment was used as a method of improving the health of grape plants from the phytoplasma. The Binder KBWF 240 growth cabinet was used for thermotherapy, in which plants of the Tsitronny Magaracha variety were cultivated in vitro under simulated conditions with a treatment period of 14 days. The results of repeated testing of samples showed the efficacy of treatment of this grape disease: out of 13 samples of the Tsitronny Magaracha variety, only one revealed the latent form of phytoplasma blackening of grapevine wood Bois noir. To improve the health of grape plants obtained in vitro culture, it is advisable to use the developed technological operations with thermotherapy in the growth cabinet, which allows to rid the planting material of the latent form of phytoplasma associated with blackening of grapevine wood Bois noir.
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Zhao G, Shen W, Tuo D, Cui H, Yan P, Tang Q, Zhu G, Li X, Zhou P, Zhang Y. Rapid detection of two emerging viruses associated with necrotic symptoms in Areca catechu L. by reverse transcription loop-mediated isothermal amplification (RT-LAMP). J Virol Methods 2019; 281:113795. [PMID: 31809783 DOI: 10.1016/j.jviromet.2019.113795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 12/02/2019] [Accepted: 12/02/2019] [Indexed: 01/29/2023]
Abstract
Two reverse-transcription loop-mediated isothermal amplification (RT-LAMP) assays were developed for the detection of areca palm necrotic ringspot virus (ANRSV) and areca palm necrotic spindle-spot virus (ANSSV), respectively. These two emerging viruses both induce necrotic symptoms in areca palms. The coat protein (CP) gene of ANRSV and the 9 K gene of ANSSV were used to design the respective RT-LAMP primers for the assays. Each set of four primers designed for each of these viruses was found to be highly specific in the detection of the respective targeted virus. The optimal incubation conditions for the RT-LAMP assays were 63 °C for 40 min for ANRSV and at 61 °C for 40 min for ANSSV. The sensitivity of the RT-LAMP method for each of these viruses was 10-fold greater than that of the corresponding conventional reverse-transcription polymerase chain reaction (RT-PCR). The RT-LAMP assays may be useful for the rapid early detection of ANSSV and ANRSV in commercial areca palm production.
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Affiliation(s)
- Guangyuan Zhao
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Wentao Shen
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Decai Tuo
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Hongguang Cui
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Pu Yan
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Qinghua Tang
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
| | - Guopeng Zhu
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Xiaoying Li
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Peng Zhou
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
| | - Yindong Zhang
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
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Zhao L, Wang M, Li J, Cui Z, Volk GM, Wang Q. Cryobiotechnology: A Double-Edged Sword for Obligate Plant Pathogens. PLANT DISEASE 2019; 103:1058-1067. [PMID: 30958107 DOI: 10.1094/pdis-11-18-1989-fe] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Pathogen-free stock plants are required as propagation materials in nurseries and healthy materials are needed in germplasm exchange between countries or regions through quarantine programs. In addition, plant gene banks also prefer to maintain pathogen-free germplasm collections. Shoot tip cryotherapy is a novel biotechnology method whereby cryopreservation methods are used to eradicate obligate pathogens from vegetatively propagated plants. Long-term preservation of pathogens is necessary in all types of virus-related basic research and applications such as antigen preparation for virus detection by immunology-based methods, production of plant-based vaccines, genetic transformation to produce virus-derived resistant transgenic plants, and bionanotechnology to produce nano drugs. Obligate plant pathogens such as viruses and viroids are intracellular parasites that colonize only living cells of the hosts. Therefore, their long-term preservation is difficult. Cryotreatments cannot completely eradicate the obligate pathogens that do not infect meristematic cells and certain proportions of plants recovered from cryotreatments are still pathogen-infected. Furthermore, cryotreatments often fail to eradicate the obligate pathogens that infect meristematic cells. Cryopreservation can be used for the long-term cryopreservation of the obligate plant pathogens. Thus, cryobiotechnology functions as a double-edged sword for plant pathogen eradication and cryopreservation. This review provides updated a synthesis of advances in cryopreservation techniques for eradication and cryopreservation of obligate plant pathogens.
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Affiliation(s)
- Lei Zhao
- 1 State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
- 2 College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Minrui Wang
- 1 State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Jingwei Li
- 1 State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
| | - Zhenhua Cui
- 3 College of Horticulture, Qingdao Agricultural University, Qingdao, Shandong, P.R. China
| | - Gayle M Volk
- 4 National Laboratory for Genetic Resources Preservation, Fort Collins, CO 80521, U.S.A
| | - Qiaochun Wang
- 1 State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, P.R. China
- 3 College of Horticulture, Qingdao Agricultural University, Qingdao, Shandong, P.R. China
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Teixeira da Silva JA, Gulyás A, Magyar-Tábori K, Wang MR, Wang QC, Dobránszki J. In vitro tissue culture of apple and other Malus species: recent advances and applications. PLANTA 2019; 249:975-1006. [PMID: 30788577 DOI: 10.1007/s00425-019-03100-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/25/2019] [Indexed: 05/08/2023]
Abstract
Studies on the tissue culture of apple have allowed for molecular, biotechnological and applied breeding research to advance. In the past 8 years, over 100 papers advancing basic biology, genetic transformation and cryobiology have emerged. Apple (Malus × domestica Borkh.; Rosaceae) is an important fruit crop grown mainly in temperate regions of the world. In vitro tissue culture is a biotechnological technique that has been used to genetically improve cultivars (scions) and rootstocks. This updated review presents a synthesis of findings related to the tissue culture of apple and other Malus spp. between 2010 and 2018. Increasingly complex molecular studies that are examining the apple genome, for example, in a bid to identify the cause of epigenetic mutations and the role of transposable elements in this process would benefit from genetically stable source material, which can be produced in vitro. Several notable or curious in vitro culture methods have been reported to improve shoot regeneration and induce the production of tetraploids in apple cultivars and rootstocks. Existing studies have revealed the molecular mechanism underlying the inhibition of adventitious roots by cytokinin. The use of the plant growth correction factor allows hypothetical shoot production from leaf-derived thin cell layers relative to conventional leaf explants to be determined. This updated review will allow novices and established researchers to advance apple and Malus biotechnology and breeding programs.
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Affiliation(s)
- Jaime A Teixeira da Silva
- , P.O. Box 7, Ikenobe, 3011-2, Kagawa-ken, 761-0799, Japan.
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
| | - Andrea Gulyás
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
| | - Katalin Magyar-Tábori
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
| | - Min-Rui Wang
- State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest Agriculture and Forestry University, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Qiao-Chun Wang
- State Key Laboratory of Crop Stress Biology in Arid Region, College of Horticulture, Northwest Agriculture and Forestry University, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Judit Dobránszki
- Research Institute of Nyíregyháza, IAREF, University of Debrecen, P.O. Box 12, Nyíregyháza, 4400, Hungary.
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