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T D, R P, S G S, S V, S P. Exploring nematicidal biomolecules from Xenorhabdus nematophila as a novel source for Meloidogyne incognita management. Toxicon 2024; 250:108101. [PMID: 39270986 DOI: 10.1016/j.toxicon.2024.108101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 08/23/2024] [Accepted: 09/11/2024] [Indexed: 09/15/2024]
Abstract
Attempts were made to evaluate the purified bioactive compounds of Xenorhabdus nematophila against Meloidogyne incognita. In order to extract the purified compounds, a solid-supported liquid-liquid extraction system with a flow rate (1 mL/min) was used to purify bioactive molecules. Compounds were individually collected concentrated and evaluated against M. incognita. Among 25 fractions the L19 fraction, exhibited 98% inhibition in egg hatching and mortality of juveniles. The biomolecules were identified through Liquid Chromatography- Mass Spectroscopy (LC-MS) technique. To decipher the mode of action of compounds, molecular docking studies were performed with potential protein targets such as acetylcholinesterase, β-1,4-endoglucanase, glutathione S-transferase-1, cytochrome c oxidase, G-protein coupled receptor and Fatty acid and retinol-binding proteins of M. incognita. The results revealed that among eight compounds from the L19 fraction, malonate and pidopidon exhibited greater binding affinity towards the selected protein targets of M. incognita. In vitro studies with malonate and pidopidon against M. incognita showcased a 99% reduction in egg hatching and juvenile mortality. Moreover, greenhouse experiments revealed that malonate compounds not only reduced 94% of the M. incognita population but also enhanced the plant growth parameters in tomato by 60%. Hence the present study stands novel in exploiting the nematicidal compounds from X. nematophila giving limelight to explore pidopidon and malonate as novel nematicidal compounds for the management of M. incognita.
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Affiliation(s)
- Deeikshana T
- Department of Nematology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Lawley Road, Coimbatore, 641 003, Tamil Nadu, India
| | - Poorniammal R
- Department of Agricultural Microbiology, Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Lawley Road, Coimbatore, 641 003, Tamil Nadu, India
| | - Shandeep S G
- Department of Nematology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Lawley Road, Coimbatore, 641 003, Tamil Nadu, India
| | - Vijay S
- Silkworm Seed Production Centre, National Silkworm Seed Organization, Central Silk Board, Dakshin Bhawanipur, West Bengal, 733 132, India
| | - Prabhu S
- Department of Nematology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Lawley Road, Coimbatore, 641 003, Tamil Nadu, India.
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2
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Dos Santos Gomes W, Pereira LL, Rodrigues da Luz JM, Soares da Silva MDC, Reis Veloso TG, Partelli FL. Exploring the microbiome of coffee plants: Implications for coffee quality and production. Food Res Int 2024; 179:113972. [PMID: 38342526 DOI: 10.1016/j.foodres.2024.113972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 12/18/2023] [Accepted: 01/02/2024] [Indexed: 02/13/2024]
Abstract
Coffee stands as one of the world's most popular beverages, and its quality undergoes the influence of numerous pre- and post-harvest procedures. These encompass genetic variety, cultivation environment, management practices, harvesting methods, and post-harvest processing. Notably, microbial communities active during fermentation hold substantial sway over the ultimate quality and sensory characteristics of the final product. The interaction between plants and microorganisms assumes critical significance, with specific microbes assuming pivotal roles in coffee plant growth, fruit development, and, subsequently, the fruit's quality. Microbial activities can synthesize or degrade compounds that influence the sensory profile of the beverage. However, studies on the metabolic products generated by various coffee-related microorganisms and their chemical functionality, especially in building sensory profiles, remain scarce. The primary aim of this study was to conduct a literature review, based on a narrative methodology, on the current understanding of the plant-microorganism interaction in coffee production. Additionally, it aimed to explore the impacts of microorganisms on plant growth, fruit production, and the fermentation processes, directly influencing the ultimate quality of the coffee beverage. Articles were sourced from ScienceDirect, Scopus, Web of Science, and Google Scholar using specific search terms such as "coffee microorganisms", "microorganisms-coffee interactions", "coffee fermentation", "coffee quality", and 'coffee post-harvest processing". The articles used were published in English between 2000 and 2023. Selection criteria involved thoroughly examining articles to ensure their inclusion was based on results about the contribution of microorganisms to both the production and quality of the coffee beverage. The exploration of microorganisms associated with the coffee plant and its fruit presents opportunities for bioprospecting, potentially leading to targeted fermentations via starter cultures, consequently generating new profiles. This study synthesizes existing data on the current understanding of the coffee-associated microbiome, its functionalities within ecosystems, the metabolic products generated by microorganisms, and their impacts on fermentation processes and grain and beverage quality. It highlights the importance of plant-microorganism interactions in the coffee production chain.
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Affiliation(s)
- Willian Dos Santos Gomes
- Genetic Improvement Program, Federal University of Espírito Santo, S/N Guararema, Alegre 29375-000, Brazil
| | - Lucas Louzada Pereira
- Coffee Design Group, Venda Nova Do Imigrante, Federal Institute of Espírito Santo (IFES), Rua Elizabeth Minete Perim, S/N, Bairro São Rafael, Espírito Santo-ES 29375-000, Brazil.
| | - José Maria Rodrigues da Luz
- Department of Microbiology, Mycorrhizal Associations Laboratory - LAMIC Universidade Federal de Viçosa (UFV), Ph Rolfs Avenue S/N, Viçosa, Minas Gerais-MG 6570-000, Brazil
| | - Marliane de Cássia Soares da Silva
- Department of Microbiology, Mycorrhizal Associations Laboratory - LAMIC Universidade Federal de Viçosa (UFV), Ph Rolfs Avenue S/N, Viçosa, Minas Gerais-MG 6570-000, Brazil
| | - Tomás Gomes Reis Veloso
- Department of Microbiology, Mycorrhizal Associations Laboratory - LAMIC Universidade Federal de Viçosa (UFV), Ph Rolfs Avenue S/N, Viçosa, Minas Gerais-MG 6570-000, Brazil
| | - Fábio Luiz Partelli
- Genetic Improvement Program, Federal University of Espírito Santo, S/N Guararema, Alegre 29375-000, Brazil
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Asad S, Priyashantha AKH, Tibpromma S, Luo Y, Zhang J, Fan Z, Zhao L, Shen K, Niu C, Lu L, Promputtha I, Karunarathna SC. Coffee-Associated Endophytes: Plant Growth Promotion and Crop Protection. BIOLOGY 2023; 12:911. [PMID: 37508343 PMCID: PMC10376224 DOI: 10.3390/biology12070911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/15/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023]
Abstract
Endophytic microbes are a ubiquitous group of plant-associated communities that colonize the intercellular or intracellular host tissues while providing numerous beneficial effects to the plants. All the plant species are thought to be associated with endophytes, majorly constituted with bacteria and fungi. During the last two decades, there has been a considerable movement toward the study of endophytes associated with coffee plants. In this review, the main consideration is given to address the coffee-associated endophytic bacteria and fungi, particularly their action on plant growth promotion and the biocontrol of pests. In addition, we sought to identify and analyze the gaps in the available research. Additionally, the potential of endophytes to improve the quality of coffee seeds is briefly discussed. Even though there are limited studies on the subject, the potentiality of coffee endophytes in plant growth promotion through enhancing nitrogen fixation, availability of minerals, nutrient absorption, secretion of phytohormones, and other bioactive metabolites has been well recognized. Further, the antagonistic effect against various coffee pathogenic bacteria, fungi, nematodes, and also insect pests leads to the protection of the crop. Furthermore, it is recognized that endophytes enhance the sensory characteristics of coffee as a new field of study.
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Affiliation(s)
- Suhail Asad
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | | | - Saowaluck Tibpromma
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Yinling Luo
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Jianqiang Zhang
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Zhuqing Fan
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Likun Zhao
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Ke Shen
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Chen Niu
- Spice and Beverage Research Institute, Chinese Academy of Tropical Agriculture Sciences, Haikou 570100, China
| | - Li Lu
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Itthayakorn Promputtha
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Samantha C Karunarathna
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China
- National Institute of Fundamental Studies (NIFS), Hantana Road, Kandy 20000, Sri Lanka
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Streptomyces hydrogenans strain DH-16 alleviates negative impact of Meloidogyne incognita stress by modifying physio-biochemical attributes in Solanum lycopersicum plants. Sci Rep 2022; 12:15214. [PMID: 36076057 PMCID: PMC9458671 DOI: 10.1038/s41598-022-19636-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 08/31/2022] [Indexed: 11/09/2022] Open
Abstract
The current study assessed the nematicidal and plant growth promoting potential of metabolites produced by Streptomyces hydrogenans strain DH-16 on morphological and physiological activities in 60 days old Solanum lycopersicum plants grown under Meloidogyne incognita stress. M. incognita infestation altered the levels of various photosynthetic pigments, various stress markers, enzymatic and non-enzymatic antioxidants in S. lycopersicum plants grown under in-vivo conditions. However, treatment with culture cells, supernatant and extract produced by S. hydrogenans strain DH-16 significantly reduced the number of galls in M. incognita infested plants when compared with untreated M. incognita infected plants. Moreover, the culture cells/ supernatant/ extract remarkably lowered the levels of stress markers (Hydrogen peroxide and Malondialdehyde) in infected plants and enhanced the activities of non-enzymatic antioxidants (glutathione, tocopherol) and enzymatic antioxidants (Catalase, Superoxide dismutase, Ascorbate peroxidase, Guaiacol peroxidase, Gluatathione-S-transferase and Polyphenol oxidase) in metabolites treated M. incognita infected plants. The enhanced level of different photosynthetic attributes were also evaluated by studying gas exchange parameters and different plant pigments. Moreover, an increment in the content of phenolic compounds such as total phenols, anthocyanin and flavonoids were also reflected in treated and nematode infested plants. The present study also evaluated the microscopic analysis depicting cell viability, nuclear damage and hydrogen peroxide localization in differently treated plants. The outcome of the present study therefore endorses the efficacy of DH-16 as a potential biocontrol agent that help plants in mitigating M. incognita stress.
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New discovery on the nematode activity of aureothin and alloaureothin isolated from endophytic bacteria Streptomyces sp. AE170020. Sci Rep 2022; 12:3947. [PMID: 35273247 PMCID: PMC8913828 DOI: 10.1038/s41598-022-07879-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 01/18/2022] [Indexed: 11/08/2022] Open
Abstract
Endophytic bacteria, a rich source of bioactive secondary metabolites, are ideal candidates for environmentally benign agents. In this study, an endophytic strain, Streptomyces sp. AE170020, was isolated and selected for the purification of nematicidal substances based on its high nematicidal activity. Two highly active components, aureothin and alloaureothin, were identified, and their chemical structures were determined using spectroscopic analysis. Both compounds suppressed the growth, reproduction, and behavior of Bursaphelenchus xylophilus. In in vivo experiments, the extracts of strain Streptomyces sp. AE170020 effectively suppressed the development of pine wilt disease in 4-year-old plants of Pinus densiflora. The potency of secondary metabolites isolated from endophytic strains suggests applications in controlling Bursaphelenchus xylophilus and opens an avenue for further research on exploring bioactive substances against the pine wood nematode.
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Asaturova AM, Bugaeva LN, Homyak AI, Slobodyanyuk GA, Kashutina EV, Yasyuk LV, Sidorov NM, Nadykta VD, Garkovenko AV. Bacillusvelezensis Strains for Protecting Cucumber Plants from Root-Knot Nematode Meloidogyne incognita in a Greenhouse. PLANTS (BASEL, SWITZERLAND) 2022; 11:275. [PMID: 35161255 PMCID: PMC8838184 DOI: 10.3390/plants11030275] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
Meloidogyne incognita Kofoid et White is one of the most dangerous root-knot nematodes in greenhouses. In this study, we evaluated two Bacillus strains (Bacillus velezensis BZR 86 and Bacillus velezensis BZR 277) as promising microbiological agents for protecting cucumber plants from the root-knot nematode M. incognita Kof. The morphological and cultural characteristics and enzymatic activity of the strains have been studied and the optimal conditions for its cultivation have been developed. We have shown the nematicidal activity of these strains against M. incognita. Experiments with the cucumber variety Courage were conducted under greenhouse conditions in 2016-2018. We determined the effect of plant damage with M. incognita to plants on the biometric parameters of underground and aboveground parts of cucumber plants, as well as on the gall formation index and yield. It was found that the treatment of plants with Bacillus strains contributed to an increase in the height of cucumber plants by 7.4-43.1%, an increase in leaf area by 2.7-17.8%, and an increase in root mass by 3.2-16.1% compared with the control plants without treatment. The application of these strains was proved to contribute to an increase in yield by 4.6-45.8% compared to control. Our experiments suggest that the treatment of cucumber plants with two Bacillus strains improved plant health and crop productivity in the greenhouse. B. velezensis BZR 86 and B. velezensis BZR 277 may form the basis for bionematicides to protect cucumber plants from the root-knot nematode M. incognita.
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Affiliation(s)
- Anzhela M. Asaturova
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Ludmila N. Bugaeva
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Anna I. Homyak
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Galina A. Slobodyanyuk
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Evgeninya V. Kashutina
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Larisa V. Yasyuk
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Nikita M. Sidorov
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Vladimir D. Nadykta
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Alexey V. Garkovenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya Str. 16/10, 117997 Moscow, Russia;
- Laboratory of Molecular Genetic Research in the Agroindustrial Complex, Department of Biotechnology, Biochemistry and Biophysics, Trubilin Kuban State Agrarian University, Kalinina Str. 13, 350044 Krasnodar, Russia
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Tóthné Bogdányi F, Boziné Pullai K, Doshi P, Erdős E, Gilián LD, Lajos K, Leonetti P, Nagy PI, Pantaleo V, Petrikovszki R, Sera B, Seres A, Simon B, Tóth F. Composted Municipal Green Waste Infused with Biocontrol Agents to Control Plant Parasitic Nematodes-A Review. Microorganisms 2021; 9:2130. [PMID: 34683451 PMCID: PMC8538326 DOI: 10.3390/microorganisms9102130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 11/28/2022] Open
Abstract
The last few years have witnessed the emergence of alternative measures to control plant parasitic nematodes (PPNs). We briefly reviewed the potential of compost and the direct or indirect roles of soil-dwelling organisms against PPNs. We compiled and assessed the most intensively researched factors of suppressivity. Municipal green waste (MGW) was identified and profiled. We found that compost, with or without beneficial microorganisms as biocontrol agents (BCAs) against PPNs, were shown to have mechanisms for the control of plant parasitic nematodes. Compost supports a diverse microbiome, introduces and enhances populations of antagonistic microorganisms, releases nematicidal compounds, increases the tolerance and resistance of plants, and encourages the establishment of a "soil environment" that is unsuitable for PPNs. Our compilation of recent papers reveals that while the scope of research on compost and BCAs is extensive, the role of MGW-based compost (MGWC) in the control of PPNs has been given less attention. We conclude that the most environmentally friendly and long-term, sustainable form of PPN control is to encourage and enhance the soil microbiome. MGW is a valuable resource material produced in significant amounts worldwide. More studies are suggested on the use of MGWC, because it has a considerable potential to create and maintain soil suppressivity against PPNs. To expand knowledge, future research directions shall include trials investigating MGWC, inoculated with BCAs.
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Affiliation(s)
| | - Krisztina Boziné Pullai
- Doctoral School of Plant Sciences, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (K.B.P.); (R.P.)
| | - Pratik Doshi
- ImMuniPot Independent Research Group, H-2100 Gödöllő, Hungary
| | - Eszter Erdős
- Doctoral School of Biological Sciences, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (E.E.); (K.L.)
| | - Lilla Diána Gilián
- Szent István Campus Dormitories, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary;
| | - Károly Lajos
- Doctoral School of Biological Sciences, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (E.E.); (K.L.)
| | - Paola Leonetti
- Bari Unit, Department of Biology, Agricultural and Food Sciences, Institute for Sustainable Plant Protection of the CNR, 70126 Bari, Italy; (P.L.); (V.P.)
| | - Péter István Nagy
- Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (P.I.N.); (A.S.)
| | - Vitantonio Pantaleo
- Bari Unit, Department of Biology, Agricultural and Food Sciences, Institute for Sustainable Plant Protection of the CNR, 70126 Bari, Italy; (P.L.); (V.P.)
| | - Renáta Petrikovszki
- Doctoral School of Plant Sciences, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (K.B.P.); (R.P.)
- Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (P.I.N.); (A.S.)
| | - Bozena Sera
- Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovakia;
| | - Anikó Seres
- Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (P.I.N.); (A.S.)
| | - Barbara Simon
- Department of Soil Science, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary;
| | - Ferenc Tóth
- Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life Sciences, H-2103 Gödöllő, Hungary; (P.I.N.); (A.S.)
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Kumar KK, Dara SK. Fungal and Bacterial Endophytes as Microbial Control Agents for Plant-Parasitic Nematodes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:4269. [PMID: 33920580 PMCID: PMC8073158 DOI: 10.3390/ijerph18084269] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 04/08/2021] [Accepted: 04/15/2021] [Indexed: 02/08/2023]
Abstract
Endophytes are symbiotic microorganisms that colonize plant tissues and benefit plants in multiple ways including induced systemic resistance to biotic and abiotic stresses. Endophytes can be sustainable alternatives to chemical nematicides and enhance plant health in a variety of cropping and natural environments. Several in vitro and in vivo studies demonstrated the potential of multiple species of Fusarium and Bacillus against plant-parasitic nematodes in horticultural, agricultural, and fodder crops and in forestry. While there were efforts to commercialize some of the endophytes as bionematicides, a lack of good formulations with consistent field efficacy has been a major hurdle in commercializing endophytes for nematode control. Identification of efficacious and environmentally resilient strains, a thorough understanding of their modes of action, interactions with various biotic and abiotic factors, and developing strategies that improve their effectiveness are critical areas to advance the commercialization of bionematicides based on fungal and bacterial endophytes.
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Affiliation(s)
- K. Kiran Kumar
- ICAR-Central Citrus Research Institute, Nagpur 440033, Maharashtra, India;
| | - Surendra K. Dara
- University of California Cooperative Extension, 2156 Sierra Way, Ste. C, San Luis Obispo, CA 93401, USA
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Duong B, Marraccini P, Maeght JL, Vaast P, Lebrun M, Duponnois R. Coffee Microbiota and Its Potential Use in Sustainable Crop Management. A Review. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2020. [DOI: 10.3389/fsufs.2020.607935] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Intensive coffee production is accompanied by several environmental issues, including soil degradation, biodiversity loss, and pollution due to the wide use of agrochemical inputs and wastes generated by processing. In addition, climate change is expected to decrease the suitability of cultivated areas while potentially increasing the distribution and impact of pests and diseases. In this context, the coffee microbiota has been increasingly studied over the past decades in order to improve the sustainability of the coffee production. Therefore, coffee associated microorganisms have been isolated and characterized in order to highlight their useful characteristics and study their potential use as sustainable alternatives to agrochemical inputs. Indeed, several microorganisms (including bacteria and fungi) are able to display plant growth-promoting capacities and/or biocontrol abilities toward coffee pests and diseases. Despite that numerous studies emphasized the potential of coffee-associated microorganisms under controlled environments, the present review highlights the lack of confirmation of such beneficial effects under field conditions. Nowadays, next-generation sequencing technologies allow to study coffee associated microorganisms with a metabarcoding/metagenomic approach. This strategy, which does not require cultivating microorganisms, now provides a deeper insight in the coffee-associated microbial communities and their implication not only in the coffee plant fitness but also in the quality of the final product. The present review aims at (i) providing an extensive description of coffee microbiota diversity both at the farming and processing levels, (ii) identifying the “coffee core microbiota,” (iii) making an overview of microbiota ability to promote coffee plant growth and to control its pests and diseases, and (iv) highlighting the microbiota potential to improve coffee quality and waste management sustainability.
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10
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Duong B, Nguyen HX, Phan HV, Colella S, Trinh PQ, Hoang GT, Nguyen TT, Marraccini P, Lebrun M, Duponnois R. Identification and characterization of Vietnamese coffee bacterial endophytes displaying in vitro antifungal and nematicidal activities. Microbiol Res 2020; 242:126613. [PMID: 33070050 DOI: 10.1016/j.micres.2020.126613] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/25/2020] [Accepted: 09/27/2020] [Indexed: 12/16/2022]
Abstract
The endophytic bacteria were isolated from coffee roots and seeds in Vietnam and identified with 16S rDNA sequencing as belonging to the Actinobacteria, Firmicutes and Proteobacteria phyla with the Nocardia, Bacillus and Burkholderia as dominant genera, respectively. Out of the thirty genera recovered from Coffea canephora and Coffea liberica, twelve were reported for the first time in endophytic association with coffee including members of the genera Brachybacterium, Caballeronia, Kitasatospora, Lechevalieria, Leifsonia, Luteibacter, Lysinibacillus, Mycolicibacterium, Nakamurella, Paracoccus, Sinomonas and Sphingobium. A total of eighty bacterial endophytes were characterized in vitro for several plant growth promoting and biocontrol traits including: the phosphate solubilization, the indolic compounds, siderophores, HCN, esterase, lipase, gelatinase and chitinase production. A subset of fifty selected bacteria were tested for their potential as biocontrol agents with in vitro confrontations with the fungal pathogen Fusarium oxysporum as well as the coffee parasitic nematodes Radopholus duriophilus and Pratylenchus coffeae. The three most efficient isolates on F. oxysporum belonging to the Bacillus, Burkholderia, and Streptomyces genera displayed a growth inhibition rate higher than 40%. Finally, five isolates from the Bacillus genus were able to lead to 100% of mortality in 24 h on both R. duriophilus and P. coffeae.
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Affiliation(s)
- Benoit Duong
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France; LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam.
| | | | | | - Stefano Colella
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France.
| | - Phap Quang Trinh
- Institute of Ecology and Biological Resources, VAST, Hanoi, Viet Nam; Graduate Univ. of Science and Technology, VAST, Hanoi, Viet Nam.
| | - Giang Thi Hoang
- LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam; National Key Laboratory for Plant Cell Biotechnology, AGI, Hanoi, Viet Nam.
| | | | - Pierre Marraccini
- LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam; IPME, Univ. Montpellier, CIRAD, IRD, Montpellier, France.
| | - Michel Lebrun
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France; LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam.
| | - Robin Duponnois
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France.
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11
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Evaluation of Stratiolaelaps scimitus (Acari: Laelapidae) for controlling the root-knot nematode, Meloidogyne incognita (Tylenchida: Heteroderidae). Sci Rep 2020; 10:5645. [PMID: 32221411 PMCID: PMC7101305 DOI: 10.1038/s41598-020-62643-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 03/17/2020] [Indexed: 11/27/2022] Open
Abstract
Root-knot nematodes are one of the most harmful plant-parasitic nematodes (PPNs). In this paper, the predation of Stratiolaelaps scimitus against Meloidogyne incognita was tested in an individual arena, and the control efficiency of the mite on the nematode in the water spinach (Ipomoea aquatica) rhizosphere was studied with a pot experiment. The results showed that S. scimitus could develop normally and complete its life cycle by feeding on second-stage juveniles of M. incognita (Mi-J2). The consumption rate of a 24 h starving female mite on Mi-J2 increased with the increase of prey density at 25 °C. Among the starvation treatments, the nematode consumption rate of a female mite starved for 96 h at 25 °C was highest; and among temperature treatments, the maximum consumption rate of a 24 h starving female mite on Mi-J2 was at 28 °C. The number of M. incognita in the spinach rhizosphere could be reduced effectively by releasing S. scimitus into rhizosphere soil, and 400 mites per pot was the optimum releasing density in which the numbers of root knots and egg masses decreased by 50.9% and 62.8%, respectively. Though we have gained a greater understanding of S. scimitus as a predator of M. incognita, the biocontrol of M. incognita using S. scimitus under field conditions remains unknown and requires further study.
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12
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Occurrence of endophytic bacteria in Vietnamese Robusta coffee roots and their effects on plant parasitic nematodes. Symbiosis 2019. [DOI: 10.1007/s13199-019-00649-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Munif A, Supramana S, Herliyana EN, Pradana AP. Endophytic Bacterial Consortium Originated from Forestry Plant Roots and Their Nematicidal Activity against Meloidogyne incognita Infestation in Greenhouse. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2019. [DOI: 10.11118/actaun201967051171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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14
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Plant growth promotion and fungal antagonism of endophytic bacteria for the sustainable production of black pepper (Piper nigrum L.). RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03972-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Ponpandian LN, Rim SO, Shanmugam G, Jeon J, Park YH, Lee SK, Bae H. Phylogenetic characterization of bacterial endophytes from four Pinus species and their nematicidal activity against the pine wood nematode. Sci Rep 2019; 9:12457. [PMID: 31462655 PMCID: PMC6713757 DOI: 10.1038/s41598-019-48745-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 07/31/2019] [Indexed: 11/16/2022] Open
Abstract
Recently, bacterial endophytes (BEs) have gained importance in the agricultural sector for their use as biocontrol agents to manage plant pathogens. Outbreak of the pine wilt disease (PWD) in Korea has led researchers to test the feasibility of BEs in controlling the pine wood nematode (PWN) Bursaphelenchus xylophilus. In this study, we have reported the diversity and biocontrol activity of BEs against the PWN. By employing a culture-dependent approach, 1,622 BEs were isolated from the needle, stem, and root tissues of P. densiflora, P. rigida, P. thunbergii, and P. koraiensis across 18 sampling sites in Korea. We classified 389 members based on 16S rDNA analysis and taxonomic binning, of which, 215 operational taxonomic units (OTUs) were determined. Using Shannon’s indices, diversity across the Pinus species and tissues was estimated to reveal the composition of BEs and their tissue-specific preferences. When their ethyl acetate crude extracts were analysed for biocontrol activity, 44 candidates with nematicidal activity were obtained. Among these, Stenotrophomonas and Bacillus sp. exhibited significant inhibitory activity against PWN during their developmental stages. Altogether, our study furnishes a basic comprehension of bacterial communities found in the Pinus species and highlights the potential of BEs as biocontrol agents to combat PWD.
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Affiliation(s)
| | - Soon Ok Rim
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Gnanendra Shanmugam
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Junhyun Jeon
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Young-Hwan Park
- Nakdonggang National Institute of Biological Resources, Sangju, 37242, Republic of Korea
| | - Sun-Keun Lee
- Division of Forest Insect Pests and Diseases, National Institute of Forest Science, Seoul, 02455, Republic of Korea
| | - Hanhong Bae
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
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Li X, Hu HJ, Li JY, Wang C, Chen SL, Yan SZ. Effects of the Endophytic Bacteria Bacillus cereus BCM2 on Tomato Root Exudates and Meloidogyne incognita Infection. PLANT DISEASE 2019; 103:1551-1558. [PMID: 31059388 DOI: 10.1094/pdis-11-18-2016-re] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Root-knot nematodes (Meloidogyne spp.) cause serious crop losses worldwide. The colonization of tomato roots by endophytic bacteria Bacillus cereus BCM2 can greatly reduce Meloidogyne incognita damage, and tomato roots carrying BCM2 were repellent to M. incognita second-stage juveniles (J2). Here, the effects of BCM2 colonization on the composition of tomato root exudates was evaluated and potential mechanisms for BCM2-mediated M. incognita control explored using a linked twin-pot assay and GC-MS. On water agar plates, J2 preferentially avoided filter paper treated with tomato root exudates (organic phase only) from plants inoculated with BCM2, visiting these 67.1% less than controls. In a linked twin-pot assay, BCM2 treatment resulted in a 42.0% reduction in the number of nematodes in the soil, a 43.3% reduction in the number of galls and a 47.7% decrease in the density of M. incognita in root tissues. Analysis of root exudate composition revealed that BCM2 inoculation increased the number of components in exudates. Among these, 2,4-di-tert-butylphenol, 3,3-dimethyloctane, and n-tridecane secretions markedly increased. In repellency trials on water agar plates, J2 avoided 2,4-di-tert-butylphenol, n-tridecane, and 3,3-dimethyloctane at concentrations of 4 mmol/liter. In a linked twin-pot assay, inoculation with 2,4-di-tert-butylphenol or 3,3-dimethyloctane reduced the number of nematodes in the soil (by 54.9 and 70.6%, respectively), the number of galls (by 53.7 and 52.4%), and the number of M. incognita in root tissues (by 67.5 and 36.3%). BCM2 colonization in tomato roots affected the composition of root exudates, increasing the secretion of substances that appear to be repellent, thus decreasing M. incognita J2 infection of roots.
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Affiliation(s)
- Xia Li
- 1 Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China
| | - Hai-Jing Hu
- 1 Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China
- 2 School of Life Science, Nanjing University, Nanjing, China
| | - Jing-Yu Li
- 1 Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China
| | - Cong Wang
- 1 Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China
| | - Shuang-Lin Chen
- 1 Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China
| | - Shu-Zhen Yan
- 1 Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China
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Hu H, Wang C, Li X, Tang Y, Wang Y, Chen S, Yan S. RNA-Seq identification of candidate defense genes targeted by endophytic Bacillus cereus-mediated induced systemic resistance against Meloidogyne incognita in tomato. PEST MANAGEMENT SCIENCE 2018; 74:2793-2805. [PMID: 29737595 DOI: 10.1002/ps.5066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 04/25/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The endophytic bacteria Bacillus cereus BCM2 has shown great potential as a defense against the parasitic nematode Meloidogyne incognita. Here, we studied endophytic bacteria-mediated plant defense against M. incognita and searched for defense-related candidate genes using RNA-Seq. RESULTS The induced systemic resistance of BCM2 against M. incognita was tested using the split-root method. Pre-inoculated BCM2 on the inducer side was associated with a dramatic reduction in galls and egg masses on the responder side, but inoculated BCM2 alone did not produce the same effect. In order to investigate which plant defense-related genes are specifically activated by BCM2, four RNA samples from tomato roots were sequenced, and four high-quality total clean bases were obtained, ranging from 6.64 to 6.75 Gb, with an average of 21 558 total genes. The 34 candidate defense-related genes were identified by pair-wise comparison among libraries, representing the targets for BCM2 priming resistance against M. incognita. Functional characterization revealed that the plant-pathogen interaction pathway (ID: ko04626) was significantly enriched for BCM2-mediated M. incognita resistance. CONCLUSION This study demonstrates that B. cereus BCM2 maintains a harmonious host-microbe relationship with tomato, but appeared to prime the plant, resulting in more vigorous defense response toward the infection nematode. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Haijing Hu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
- School of Life Sciences, Nanjing University, Nanjing, China
| | - Cong Wang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xia Li
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Yunyun Tang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Yufang Wang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Shuanglin Chen
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Shuzhen Yan
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China
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18
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Plant-Parasitic Nematode Problems in Organic Agriculture. SUSTAINABLE DEVELOPMENT AND BIODIVERSITY 2016. [DOI: 10.1007/978-3-319-26803-3_5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Abebe E, Mekete T, Seid A, Meressa BH, Wondafrash M, Addis T, Getaneh G, Abate BA. Research on plant-parasitic and entomopathogenic nematodes in Ethiopia: a review of current state and future direction. NEMATOLOGY 2015. [DOI: 10.1163/15685411-00002919] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Food self-sufficiency is Ethiopia’s national priority goal. Given that pest management seriously impacts agriculture, research on crop diseases is of paramount significance to the national goal. Here we provide a comprehensive account of research on plant-parasitic and entomopathogenic nematodes in Ethiopia. We show that the limited information available indicates that plant-parasitic nematodes impact crop production. There exists a serious gap in knowledge with regard to the effects of plant-parasitic nematodes on almost all major crops. This gap includes surveys with appropriate levels of identification, distribution, and yield loss and damage threshold studies on target crops. The current state of knowledge hinders the nation’s ability to design and implement appropriate control strategies for plant-parasitic nematodes. We propose a strategic assessment of plant-parasitic nematodes of all major crops, the need for systematic manpower training and continued search for entomopathogenic nematodes in the major agro-ecological zones of the nation and further research on those entomopathogenic nematodes already identified.
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Affiliation(s)
- Eyualem Abebe
- Elizabeth City State University, Elizabeth City, NC 27909, USA
| | - Tesfamariam Mekete
- Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA
| | - Awol Seid
- Haramaya University, College of Agriculture and Environmental Sciences, School of Plant Sciences, P.O. Box 138, Dire Dawa, Ethiopia
| | - Beira H. Meressa
- Julius Kühn-Institut, Federal Research Center for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Toppheideweg 88, 48161 Münster, Germany
| | - Mesfin Wondafrash
- Haramaya University, College of Agriculture and Environmental Sciences, School of Plant Sciences, P.O. Box 138, Dire Dawa, Ethiopia
- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South Africa
| | - Temesgen Addis
- Faculty of Agricultural and Nutritional Sciences, Christian-Albrechts-University Kiel, Hermann-Rodewald-Str. 4, 24118 Kiel, Germany
| | - Gezahegn Getaneh
- College of Veterinary Medicine and Agriculture, Salale Campus, Addis Ababa University P.O. Box 245, Fitche, Ethiopia
| | - Birhan A. Abate
- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South Africa
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