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Yiallouris A, Pana ZD, Marangos G, Tzyrka I, Karanasios S, Georgiou I, Kontopyrgia K, Triantafyllou E, Seidel D, Cornely OA, Johnson EO, Panagiotou S, Filippou C. Fungal diversity in the soil Mycobiome: Implications for ONE health. One Health 2024; 18:100720. [PMID: 38699438 PMCID: PMC11064618 DOI: 10.1016/j.onehlt.2024.100720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 04/02/2024] [Indexed: 05/05/2024] Open
Abstract
Today, over 300 million individuals worldwide are afflicted by severe fungal infections, many of whom will perish. Fungi, as a result of their plastic genomes have the ability to adapt to new environments and extreme conditions as a consequence of globalization, including urbanization, agricultural intensification, and, notably, climate change. Soils and the impact of these anthropogenic environmental factors can be the source of pathogenic and non-pathogenic fungi and subsequent fungal threats to public health. This underscores the growing understanding that not only is fungal diversity in the soil mycobiome a critical component of a functioning ecosystem, but also that soil microbial communities can significantly contribute to plant, animal, and human health, as underscored by the One Health concept. Collectively, this stresses the importance of investigating the soil microbiome in order to gain a deeper understanding of soil fungal ecology and its interplay with the rhizosphere microbiome, which carries significant implications for human health, animal health and environmental health.
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Affiliation(s)
- Andreas Yiallouris
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
| | - Zoi D. Pana
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
| | | | | | | | | | | | | | - Danila Seidel
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), Cologne, Germany
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) and Excellence Center for Medical Mycology (ECMM), Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Oliver A. Cornely
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), Cologne, Germany
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) and Excellence Center for Medical Mycology (ECMM), Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Elizabeth O. Johnson
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
| | - Stavros Panagiotou
- School of Medicine, European University, Cyprus
- Division of Medical Education, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester
| | - Charalampos Filippou
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
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Wojtasik W, Dymińska L, Hanuza J, Burgberger M, Boba A, Szopa J, Kulma A, Mierziak J. Endophytic non-pathogenic Fusarium oxysporum reorganizes the cell wall in flax seedlings. FRONTIERS IN PLANT SCIENCE 2024; 15:1352105. [PMID: 38590745 PMCID: PMC10999547 DOI: 10.3389/fpls.2024.1352105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/13/2024] [Indexed: 04/10/2024]
Abstract
Introduction Flax (Linum usitatissimum) is a crop producing valuable products like seeds and fiber. However, its cultivation faces challenges from environmental stress factors and significant yield losses due to fungal infections. The major threat is Fusarium oxysporum f.sp lini, causing fusarium wilt of flax. Interestingly, within the Fusarium family, there are non-pathogenic strains known as biocontrols, which protect plants from infections caused by pathogenic strains. When exposed to a non-pathogenic strain, flax exhibits defense responses similar to those seen during pathogenic infections. This sensitization process activates immune reactions, preparing the plant to better combat potential pathogenic strains. The plant cell wall is crucial for defending against pathogens. It serves as the primary barrier, blocking pathogen entry into plant cells. Methods The aim of the study was to investigate the effects of treating flax with a non-pathogenic Fusarium oxysporum strain, focusing on cell wall remodeling. The infection's progress was monitored by determining the fungal DNA content and microscopic observation. The plant defense response was confirmed by an increase in the level of Pathogenesis-Related (PR) genes transcripts. The reorganization of flax cell wall during non-pathogenic Fusarium oxysporum strain infection was examined using Infrared spectroscopy (IR), determination of cell wall polymer content, and analysis of mRNA level of genes involved in their metabolism. Results and discussion IR analysis revealed reduced cellulose content in flax seedlings after treatment with Fo47 and that the cellulose chains were shorter and more loosely bound. Hemicellulose content was also reduced but only after 12h and 36h. The total pectin content remained unchanged, while the relative share of simple sugars and uronic acids in the pectin fractions changed over time. In addition, a dynamic change in the level of methylesterification of carboxyl groups of pectin was observed in flax seedlings treated with Fo47 compared to untreated seedlings. The increase in lignin content was observed only 48 hours after the treatment with non-pathogenic Fusarium oxysporum. Analysis of mRNA levels of cell wall polymer metabolism genes showed significant changes over time in all analyzed genes. In conclusion, the research suggests that the rearrangement of the cell wall is likely one of the mechanisms behind flax sensitization by the non-pathogenic Fusarium oxysporum strain. Understanding these processes could help in developing strategies to enhance flax's resistance to fusarium wilt and improve its overall yield and quality.
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Affiliation(s)
- Wioleta Wojtasik
- Department of Genetic Biochemistry, Faculty of Biotechnology, Wroclaw University, Wroclaw, Poland
| | - Lucyna Dymińska
- Department of Bioorganic Chemistry, Wrocław University of Economics and Business, Wrocław, Poland
| | - Jerzy Hanuza
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
| | - Marta Burgberger
- Department of Genetic Biochemistry, Faculty of Biotechnology, Wroclaw University, Wroclaw, Poland
| | - Aleksandra Boba
- Department of Genetic Biochemistry, Faculty of Biotechnology, Wroclaw University, Wroclaw, Poland
| | - Jan Szopa
- Department of Genetic Biochemistry, Faculty of Biotechnology, Wroclaw University, Wroclaw, Poland
| | - Anna Kulma
- Department of Genetic Biochemistry, Faculty of Biotechnology, Wroclaw University, Wroclaw, Poland
| | - Justyna Mierziak
- Department of Genetic Biochemistry, Faculty of Biotechnology, Wroclaw University, Wroclaw, Poland
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Xu H, Zhu M, Chen X. Fungal epiphytes differentially regulate salt tolerance of invasive Ipomoea cairica according to salt stress levels. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:4797-4807. [PMID: 38105332 DOI: 10.1007/s11356-023-31540-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 12/10/2023] [Indexed: 12/19/2023]
Abstract
Fungal symbionts can improve plant tolerance to salt stress. However, the interaction of epiphytic Fusarium oxysporum and Fusarium fujikuroi with the tolerance of the invasive plant Ipomoea cairica against saline coastal habitats is largely unknown. This study aimed to investigate the interaction of the mixture of the two epiphytic fungi with salt tolerance of I. cairica. Surface-sterilized I. cairica cuttings inoculated (E+) and non-inoculated (E-) with the fungal mixture were cultivated with 2, 3, and 5 parts per thousand (PPT) of NaCl solutions to simulate mild, moderate, and severe salt stress, respectively. The hydroponic experiment showed that the growth inhibition and peroxidation damages of E+ and E- cuttings were aggravated with salinity. Noteworthily, E+ cuttings had higher peroxidase (POD) and catalase (CAT) activities, chlorophyll content, total biomass, aboveground biomass, total shoot length and secondary shoot number, but lower root-to-shoot ratio than E- cuttings under 2 and 3 PPT NaCl conditions. Moreover, E+ had higher superoxide dismutase (SOD) activity and proline content but lower belowground biomass and malondialdehyde (MDA) content than E- cuttings under 3 PPT NaCl condition. However, lower SOD, POD, and CAT activities, and chlorophyll content, but higher MDA content occurred in E+ cuttings than in E- cuttings under 5 PPT NaCl condition. These findings suggested that the mixture of the two epiphytic fungi increased salt tolerance of I. cairica mainly through increasing its antioxidation ability and chlorophyll stability under mildly and moderately saline conditions, but decreased salt tolerance of this plant in an opposite way under severely saline conditions.
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Affiliation(s)
- Hua Xu
- School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan, 430048, China
| | - Minjie Zhu
- Hunan Polytechnic of Environment and Biology, Hengyang, 421005, China
| | - Xuhui Chen
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110161, China.
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Iakovidis M, Chung EH, Saile SC, Sauberzweig E, El Kasmi F. The emerging frontier of plant immunity's core hubs. FEBS J 2023; 290:3311-3335. [PMID: 35668694 DOI: 10.1111/febs.16549] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/20/2022] [Accepted: 06/06/2022] [Indexed: 12/15/2022]
Abstract
The ever-growing world population, increasingly frequent extreme weather events and conditions, emergence of novel devastating crop pathogens and the social strive for quality food products represent a huge challenge for current and future agricultural production systems. To address these challenges and find realistic solutions, it is becoming more important by the day to understand the complex interactions between plants and the environment, mainly the associated organisms, but in particular pathogens. In the past several years, research in the fields of plant pathology and plant-microbe interactions has enabled tremendous progress in understanding how certain receptor-based plant innate immune systems function to successfully prevent infections and diseases. In this review, we highlight and discuss some of these new ground-breaking discoveries and point out strategies of how pathogens counteract the function of important core convergence hubs of the plant immune system. For practical reasons, we specifically place emphasis on potential applications that can be detracted by such discoveries and what challenges the future of agriculture has to face, but also how these challenges could be tackled.
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Affiliation(s)
- Michail Iakovidis
- Horticultural Genetics and Biotechnology Department, Mediterranean Agricultural Institute of Chania, Greece
| | - Eui-Hwan Chung
- Department of Plant Biotechnology, College of Life Sciences & Biotechnology, Korea University, Seoul, Korea
| | - Svenja C Saile
- Centre for Plant Molecular Biology, University of Tübingen, Germany
| | - Elke Sauberzweig
- Centre for Plant Molecular Biology, University of Tübingen, Germany
| | - Farid El Kasmi
- Centre for Plant Molecular Biology, University of Tübingen, Germany
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5
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Toppo P, Kagatay LL, Gurung A, Singla P, Chakraborty R, Roy S, Mathur P. Endophytic fungi mediates production of bioactive secondary metabolites via modulation of genes involved in key metabolic pathways and their contribution in different biotechnological sector. 3 Biotech 2023; 13:191. [PMID: 37197561 PMCID: PMC10183385 DOI: 10.1007/s13205-023-03605-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 05/03/2023] [Indexed: 05/19/2023] Open
Abstract
Endophytic fungi stimulate the production of an enormous number of bioactive metabolites in medicinal plants and affect the different steps of biosynthetic pathways of these secondary metabolites. Endophytic fungi possess a number of biosynthetic gene clusters that possess genes for various enzymes, transcription factors, etc., in their genome responsible for the production of secondary metabolites. Additionally, endophytic fungi also modulate the expression of various genes responsible for the synthesis of key enzymes involved in metabolic pathways of such as HMGR, DXR, etc. involved in the production of a large number of phenolic compounds as well as regulate the expression of genes involved in the production of alkaloids and terpenoids in different plants. This review aims to provide a comprehensive overview of gene expression related to endophytes and their impact on metabolic pathways. Additionally, this review will emphasize the studies done to isolate these secondary metabolites from endophytic fungi in large quantities and assess their bioactivity. Due to ease in synthesis of secondary metabolites and their huge application in the medical industry, these bioactive metabolites are now being extracted from strains of these endophytic fungi commercially. Apart from their application in the pharmaceutical industry, most of these metabolites extracted from endophytic fungi also possess plant growth-promoting ability, bioremediation potential, novel bio control agents, sources of anti-oxidants, etc. The review will comprehensively shed a light on the biotechnological application of these fungal metabolites at the industrial level.
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Affiliation(s)
- Prabha Toppo
- Microbiology Laboratory, Department of Botany, University of North Bengal, Rajarammohunpur, Dist. Darjeeling, Siliguri, West Bengal India
| | - Lahasang Lamu Kagatay
- Microbiology Laboratory, Department of Botany, University of North Bengal, Rajarammohunpur, Dist. Darjeeling, Siliguri, West Bengal India
| | - Ankita Gurung
- Microbiology Laboratory, Department of Botany, University of North Bengal, Rajarammohunpur, Dist. Darjeeling, Siliguri, West Bengal India
| | - Priyanka Singla
- Department of Botany, Mount Carmel College, Bengaluru, Karnataka India
| | - Rakhi Chakraborty
- Department of Botany, Acharya Prafulla Chandra Roy Government College, Dist. Darjeeling, Siliguri, West Bengal India
| | - Swarnendu Roy
- Plant Biochemistry Laboratory, Department of Botany, University of North Bengal, Rajarammohunpur, Dist. Darjeeling, Siliguri, West Bengal India
| | - Piyush Mathur
- Microbiology Laboratory, Department of Botany, University of North Bengal, Rajarammohunpur, Dist. Darjeeling, Siliguri, West Bengal India
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Martínez-Soto D, Yu H, Allen KS, Ma LJ. Differential Colonization of the Plant Vasculature Between Endophytic Versus Pathogenic Fusarium oxysporum Strains. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2023; 36:4-13. [PMID: 36279112 PMCID: PMC10052776 DOI: 10.1094/mpmi-08-22-0166-sc] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Plant xylem colonization is the hallmark of vascular wilt diseases caused by phytopathogens within the Fusarium oxysporum species complex. Recently, xylem colonization has also been reported among endophytic F. oxysporum strains, resulting in some uncertainty. This study compares xylem colonization processes by pathogenic versus endophytic strains in Arabidopsis thaliana and Solanum lycopersicum, using Arabidopsis pathogen Fo5176, tomato pathogen Fol4287, and the endophyte Fo47, which can colonize both plant hosts. We observed that all strains were able to advance from epidermis to endodermis within 3 days postinoculation (dpi) and reached the root xylem at 4 dpi. However, this shared progression was restricted to lateral roots and the elongation zone of the primary root. Only pathogens reached the xylem above the primary-root maturation zone (PMZ). Related to the distinct colonization patterns, we also observed stronger induction of callose at the PMZ and lignin deposition at primary-lateral root junctions by the endophyte in both plants. This observation was further supported by stronger induction of Arabidopsis genes involved in callose and lignin biosynthesis during the endophytic colonization (Fo47) compared with the pathogenic interaction (Fo5176). Moreover, both pathogens encode more plant cell wall-degrading enzymes than the endophyte Fo47. Therefore, observed differences in callose and lignin deposition could be the combination of host production and the subsequent fungal degradation. In summary, this study demonstrates spatial differences between endophytic and pathogenic colonization, strongly suggesting that further investigations of molecular arm-races are needed to understand how plants differentiate friend from foe. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Zheng X, Xiao R, Chen M, Wu H, Gao X, Wang J. An avirulent Ralstonia solanacearum strain FJAT1458 outcompetes with virulent strain and induces tomato plant resistance against bacterial wilt. PEST MANAGEMENT SCIENCE 2022; 78:5002-5013. [PMID: 36053816 DOI: 10.1002/ps.7123] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/22/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Bacterial wilt (BW) caused by Ralstonia solanacearum (RS) is considered as one of the most destructive plant diseases. An avirulent strain of RS, FJAT1458, is a potential biocontrol agent of BW. In this study, the mechanism of FJAT1458 against BW was evaluated. RESULTS FJAT1458 was tagged with the red fluorescent protein gene, and the resulting strain was named as FJAT1458-RFP. When FJAT1458-RFP and FJAT91-GFP (a virulent strain of RS labelled with the green fluorescent protein gene), were co-inoculated in potted tomato plants, the colonization of FJAT91-GFP reached an almost undetectable level at 7 days post-inoculation (dpi) in the roots and at 9 dpi in rhizosphere soil. When they were co-inoculated in a hydroponic tomato growing system, numbers of the two strains were similar at 3 dpi in the root tissues; however, FJAT91-GFP was not detected at 9 dpi while FJAT1458-RFP maintained 1.77 × 105 CFU g-1 . The inoculation of FJAT1458-RFP alone or combination with FJAT91-GFP significantly increased tomato root activity. Moreover, expression levels of the defense-related genes PR-1a, GLUA, and CHI3 in tomato roots were significantly up-regulated by FJAT1458-RFP and co-inoculation of FJAT1458-RFP and FJAT91-GFP at 5 dpi, compared to the control (water, CK) treatment. Noteworthy, expression levels of GLUA in the treatments of FJAT1458-RFP and FJAT1458-RFP + FJAT91-GFP were 12.22- and 12.05-fold higher than that in the CK at 5 dpi, respectively. CONCLUSIONS The results suggested that the avirulent strain FJAT1458-RFP could suppress colonization of the virulent strain in tomato roots, and induce tomato plant resistance against BW. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Xuefang Zheng
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Rongfeng Xiao
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Meichun Chen
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Huijun Wu
- Key Laboratory of Integrated and Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xuewen Gao
- Key Laboratory of Integrated and Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jieping Wang
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
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8
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The Improved Biocontrol Agent, F1-35, Protects Watermelon against Fusarium Wilt by Triggering Jasmonic Acid and Ethylene Pathways. Microorganisms 2022; 10:microorganisms10091710. [PMID: 36144312 PMCID: PMC9501610 DOI: 10.3390/microorganisms10091710] [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: 07/17/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
Watermelon Fusarium wilt, caused by Fusarium oxysporum f. sp. niveum (FON), is one of the most important diseases, and has become a major limiting factor to watermelon production worldwide. Previous research has found that the improved biocontrol agent, F1-35, had a high control efficiency to watermelon Fusarium wilt. In this study, the control efficiency of F1-35 to watermelon Fusarium wilt was firstly tested, and the control efficiency was 61.7%. Then, we investigated the mode of action of F1-35 in controlling watermelon Fusarium wilt. Using a pairing assay, we found that F1-35 did not inhibit the normal growth of FON. To know more about the interaction between F1-35 and watermelon root, the protein expressions of roots after 12, 24, and 48 h post-inoculation were examined. A total of 1109 differentially expressed proteins were obtained. KEGG analysis found that the most differentially expressed proteins occurred in alpha-linolenic acid metabolism, cysteine and methionine metabolism, plant–pathogen interaction, and the MAPK signaling pathway to the plant. A further analysis of differentially expressed proteins showed that F1-35 triggered the jasmonic acid and ethylene pathways in watermelon. To validate our results, the qRT-PCR was used to analyze the gene expression levels of PAL, LOX1, and CTR1. The gene expression results showed that those genes, which were positive correlated with the JA pathway, were up-expressed, including PAL and LOX1, and the negative associated gene, CTR1, was down-expressed. In conclusion, the improved biocontrol agent, F1-35, improves the resistance of watermelons to FON by triggering the JA and ET pathways.
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Redkar A, Sabale M, Schudoma C, Zechmann B, Gupta YK, López-Berges MS, Venturini G, Gimenez-Ibanez S, Turrà D, Solano R, Di Pietro A. Conserved secreted effectors contribute to endophytic growth and multihost plant compatibility in a vascular wilt fungus. THE PLANT CELL 2022; 34:3214-3232. [PMID: 35689625 PMCID: PMC9421472 DOI: 10.1093/plcell/koac174] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 06/03/2022] [Indexed: 05/04/2023]
Abstract
Fungal interactions with plant roots, either beneficial or detrimental, have a crucial impact on agriculture and ecosystems. The cosmopolitan plant pathogen Fusarium oxysporum (Fo) provokes vascular wilts in more than a hundred different crops. Isolates of this fungus exhibit host-specific pathogenicity, which is conferred by lineage-specific Secreted In Xylem (SIX) effectors encoded on accessory genomic regions. However, such isolates also can colonize the roots of other plants asymptomatically as endophytes or even protect them against pathogenic strains. The molecular determinants of endophytic multihost compatibility are largely unknown. Here, we characterized a set of Fo candidate effectors from tomato (Solanum lycopersicum) root apoplastic fluid; these early root colonization (ERC) effectors are secreted during early biotrophic growth on main and alternative plant hosts. In contrast to SIX effectors, ERCs have homologs across the entire Fo species complex as well as in other plant-interacting fungi, suggesting a conserved role in fungus-plant associations. Targeted deletion of ERC genes in a pathogenic Fo isolate resulted in reduced virulence and rapid activation of plant immune responses, while ERC deletion in a nonpathogenic isolate led to impaired root colonization and biocontrol ability. Strikingly, some ERCs contribute to Fo infection on the nonvascular land plant Marchantia polymorpha, revealing an evolutionarily conserved mechanism for multihost colonization by root infecting fungi.
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Affiliation(s)
| | - Mugdha Sabale
- Departamento de Genética, Universidad de Córdoba, 14071 Córdoba, Spain
| | | | - Bernd Zechmann
- Baylor University, Center for Microscopy and Imaging, Waco, Texas 76798, USA
| | - Yogesh K Gupta
- The Sainsbury Laboratory, Norwich Research Park, Norwich NR4 7UH, UK
| | | | | | - Selena Gimenez-Ibanez
- Plant Molecular Genetics Department, Centro Nacional de Biotecnologıa-CSIC (CNB-CSIC), 28049 Madrid, Spain
| | - David Turrà
- Department of Agriculture and Center for Studies on Bioinspired Agro-enviromental Technology, Università di Napoli Federico II, 80055 Portici, Italy
| | - Roberto Solano
- Plant Molecular Genetics Department, Centro Nacional de Biotecnologıa-CSIC (CNB-CSIC), 28049 Madrid, Spain
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Byregowda R, Prasad SR, Oelmüller R, Nataraja KN, Prasanna Kumar MK. Is Endophytic Colonization of Host Plants a Method of Alleviating Drought Stress? Conceptualizing the Hidden World of Endophytes. Int J Mol Sci 2022; 23:ijms23169194. [PMID: 36012460 PMCID: PMC9408852 DOI: 10.3390/ijms23169194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 11/16/2022] Open
Abstract
In the wake of changing climatic conditions, plants are frequently exposed to a wide range of biotic and abiotic stresses at various stages of their development, all of which negatively affect their growth, development, and productivity. Drought is one of the most devastating abiotic stresses for most cultivated crops, particularly in arid and semiarid environments. Conventional breeding and biotechnological approaches are used to generate drought-tolerant crop plants. However, these techniques are costly and time-consuming. Plant-colonizing microbes, notably, endophytic fungi, have received increasing attention in recent years since they can boost plant growth and yield and can strengthen plant responses to abiotic stress. In this review, we describe these microorganisms and their relationship with host plants, summarize the current knowledge on how they “reprogram” the plants to promote their growth, productivity, and drought tolerance, and explain why they are promising agents in modern agriculture.
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Affiliation(s)
- Roopashree Byregowda
- Department of Seed Science and Technology, University of Agricultural Sciences, Bangalore 560065, India
- Department of Plant Physiology, Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany, Friedrich-Schiller-University, 07743 Jena, Germany
| | | | - Ralf Oelmüller
- Department of Plant Physiology, Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany, Friedrich-Schiller-University, 07743 Jena, Germany
- Correspondence:
| | - Karaba N. Nataraja
- Department of Crop Physiology, University of Agricultural Sciences, Bangalore 560065, India
| | - M. K. Prasanna Kumar
- Department of Plant Pathology, University of Agricultural Sciences, Bangalore 560065, India
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11
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Pantazi XE, Lagopodi AL, Tamouridou AA, Kamou NN, Giannakis I, Lagiotis G, Stavridou E, Madesis P, Tziotzios G, Dolaptsis K, Moshou D. Diagnosis of Induced Resistance State in Tomato Using Artificial Neural Network Models Based on Supervised Self-Organizing Maps and Fluorescence Kinetics. SENSORS (BASEL, SWITZERLAND) 2022; 22:5970. [PMID: 36015731 PMCID: PMC9416397 DOI: 10.3390/s22165970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/04/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
The aim of this study was to develop three supervised self-organizing map (SOM) models for the automatic recognition of a systemic resistance state in plants after application of a resistance inducer. The pathosystem Fusarium oxysporum f. sp. radicis-lycopersici (FORL) + tomato was used. The inorganic, defense inducer, Acibenzolar-S-methyl (benzo-[1,2,3]-thiadiazole-7-carbothioic acid-S-methyl ester, ASM), reported to induce expression of defense genes in tomato, was applied to activate the defense mechanisms in the plant. A handheld fluorometer, FluorPen FP 100-MAX-LM by SCI, was used to assess the fluorescence kinetics response of the induced resistance in tomato plants. To achieve recognition of resistance induction, three models of supervised SOMs, namely SKN, XY-F, and CPANN, were used to classify fluorescence kinetics data, in order to determine the induced resistance condition in tomato plants. To achieve this, a parameterization of fluorescence kinetics curves was developed corresponding to fluorometer variables of the Kautsky Curves. SKN was the best supervised SOM, achieving 97.22% to 100% accuracy. Gene expression data were used to confirm the accuracy of the supervised SOMs.
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Affiliation(s)
- Xanthoula Eirini Pantazi
- Laboratory of Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Anastasia L. Lagopodi
- Laboratory of Plant Pathology, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Afroditi Alexandra Tamouridou
- Laboratory of Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Nathalie Nephelie Kamou
- Laboratory of Plant Pathology, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ioannis Giannakis
- Laboratory of Plant Pathology, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Georgios Lagiotis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thermi, 57001 Thessaloniki, Greece or
| | - Evangelia Stavridou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thermi, 57001 Thessaloniki, Greece or
| | - Panagiotis Madesis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thermi, 57001 Thessaloniki, Greece or
- Laboratory of Molecular Biology of Plants, School of Agricultural Sciences, University of Thessaly, 38221 Volos, Greece
| | - Georgios Tziotzios
- Laboratory of Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Konstantinos Dolaptsis
- Laboratory of Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Dimitrios Moshou
- Laboratory of Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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12
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Kim B, Park AR, Song CW, Song H, Kim JC. Biological Control Efficacy and Action Mechanism of Klebsiella pneumoniae JCK-2201 Producing Meso-2,3-Butanediol Against Tomato Bacterial Wilt. Front Microbiol 2022; 13:914589. [PMID: 35910601 PMCID: PMC9333516 DOI: 10.3389/fmicb.2022.914589] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/15/2022] [Indexed: 11/13/2022] Open
Abstract
Bacterial wilt caused by Ralstonia solanacearum is a fatal disease that affects the production of tomatoes and many other crops worldwide. As an effective strategy to manage bacterial wilt, biological control agents using plant growth-promoting rhizobacteria (PGPR) are being developed. In this study, we screened 2,3-butanediol (BDO)-producing PGPR to control tomato bacterial wilt and investigated the action mechanism of the disease control agent. Of the 943 strains isolated from soil, Klebsiella pneumoniae strain JCK-2201 produced the highest concentration of 2,3-BDO. The culture broth of K. pneumoniae JCK-2201 did not show any direct activity on R. solanacearum in vitro, but a 100-fold dilution effectively controlled tomato bacterial wilt with a control value of 77% in vivo. Fermentation utilizing K. pneumoniae JCK-2201 was optimized to produce 48 g/L of meso-2,3-BDO, which is 50% of the sucrose conversion efficiency. In addition, the control efficacy and mechanism of meso-2,3-BDO produced by JCK-2201 in tomato bacterial wilt were determined by comparative analysis with Bacillus licheniformis DSM13 producing meso-2,3-BDO and B. licheniformis DSM13 ΔalsS that did not produce 2,3-BDO, as the step of converting pyruvate to α-acetolactate was omitted. Tomato seedlings treated with the K. pneumoniae JCK-2201 (500-fold dilution) and B. licheniformis DSM13 (100-fold dilution) culture broth produced meso-2,3-BDO that significantly reduced R. solanacearum-induced disease severity with control values of 55% and 63%, respectively. The formulated meso-2,3-BDO 9% soluble concentrate (SL; 1,000-fold dilution) showed 87% control against tomato bacterial wilt in the field condition. Klebsiella pneumoniae JCK-2201 and B. licheniformis DSM13 treatment induced the expression of plant defense marker genes, such as LePR1, LePR2, LePR5, LePR3, and PI-II, in the salicylic acid and jasmonic acid signaling pathways at 4 days after inoculation. These results show that 2,3-BDO-producing bacteria and 2,3-BDO are potential biological control agents that act through induction of resistance for controlling tomato bacterial wilt.
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Affiliation(s)
- Bora Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju, South Korea
| | - Ae Ran Park
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju, South Korea
| | - Chan Woo Song
- Research and Department Center, GS Caltex Corporation, Daejeon, South Korea
| | - Hyohak Song
- Research and Department Center, GS Caltex Corporation, Daejeon, South Korea
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju, South Korea
- *Correspondence: Jin-Cheol Kim,
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13
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Park AR, Kim J, Kim B, Ha A, Son JY, Song CW, Song H, Kim JC. Exogenous Bio-Based 2,3-Butanediols Enhanced Abiotic Stress Tolerance of Tomato and Turfgrass under Drought or Chilling Stress. J Microbiol Biotechnol 2022; 32:582-593. [PMID: 35484968 PMCID: PMC9628875 DOI: 10.4014/jmb.2201.01025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 04/09/2022] [Accepted: 04/11/2022] [Indexed: 12/15/2022]
Abstract
Among abiotic stresses in plants, drought and chilling stresses reduce the supply of moisture to plant tissues, inhibit photosynthesis, and severely reduce plant growth and yield. Thus, the application of water stress-tolerant agents can be a useful strategy to maintain plant growth under abiotic stresses. This study assessed the effect of exogenous bio-based 2,3-butanediol (BDO) application on drought and chilling response in tomato and turfgrass, and expression levels of several plant signaling pathway-related gene transcripts. Bio-based 2,3-BDOs were formulated to levo-2,3-BDO 0.9% soluble concentrate (levo 0.9% SL) and meso-2,3-BDO 9% SL (meso 9% SL). Under drought and chilling stress conditions, the application of levo 0.9% SL in creeping bentgrass and meso 9% SL in tomato plants significantly reduced the deleterious effects of abiotic stresses. Interestingly, pretreatment with levo-2,3-BDO in creeping bentgrass and meso-2,3-BDO in tomato plants enhanced JA and SA signaling pathway-related gene transcript expression levels in different ways. In addition, all tomato plants treated with acibenzolar-S-methyl (as a positive control) withered completely under chilling stress, whereas 2,3-BDO-treated tomato plants exhibited excellent cold tolerance. According to our findings, bio-based 2,3-BDO isomers as sustainable water stress-tolerant agents, levo- and meso-2,3-BDOs, could enhance tolerance to drought and/or chilling stresses in various plants through somewhat different molecular activities without any side effects.
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Affiliation(s)
- Ae Ran Park
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jongmun Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Bora Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Areum Ha
- Plant Healthcare Research Institute, JAN153 Biotech Incorporated, Gwangju 61186, Republic of Korea
| | - Ji-Yeon Son
- Plant Healthcare Research Institute, JAN153 Biotech Incorporated, Gwangju 61186, Republic of Korea
| | - Chan Woo Song
- Research and Development Center, GS Caltex Corporation, Daejeon 34122, Republic of Korea
| | - Hyohak Song
- Research and Development Center, GS Caltex Corporation, Daejeon 34122, Republic of Korea
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea,Plant Healthcare Research Institute, JAN153 Biotech Incorporated, Gwangju 61186, Republic of Korea,Corresponding author Phone: +82-62-530-2132 Fax: +82-62-530-2139 E-mail:
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14
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Stavridou E, Giannakis I, Karamichali I, Kamou NN, Lagiotis G, Madesis P, Emmanouil C, Kungolos A, Nianiou-Obeidat I, Lagopodi AL. Biosolid-Amended Soil Enhances Defense Responses in Tomato Based on Metagenomic Profile and Expression of Pathogenesis-Related Genes. PLANTS (BASEL, SWITZERLAND) 2021; 10:2789. [PMID: 34961260 PMCID: PMC8709368 DOI: 10.3390/plants10122789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/12/2021] [Accepted: 12/13/2021] [Indexed: 05/28/2023]
Abstract
Biosolid application is an effective strategy, alternative to synthetic chemicals, for enhancing plant growth and performance and improving soil properties. In previous research, biosolid application has shown promising results with respect to tomato resistance against Fusarium oxysporum f. sp. radicis-lycopersici (Forl). Herein, we aimed at elucidating the effect of biosolid application on the plant-microbiome response mechanisms for tomato resistance against Forl at a molecular level. More specifically, plant-microbiome interactions in the presence of biosolid application and the biocontrol mechanism against Forl in tomato were investigated. We examined whether biosolids application in vitro could act as an inhibitor of growth and sporulation of Forl. The effect of biosolid application on the biocontrol of Forl was investigated based on the enhanced plant resistance, measured as expression of pathogen-response genes, and pathogen suppression in the context of soil microbiome diversity, abundance, and predicted functions. The expression of the pathogen-response genes was variably induced in tomato plants in different time points between 12 and 72 h post inoculation in the biosolid-enriched treatments, in the presence or absence of pathogens, indicating activation of defense responses in the plant. This further suggests that biosolid application resulted in a successful priming of tomato plants inducing resistance mechanisms against Forl. Our results have also demonstrated that biosolid application alters microbial diversity and the predicted soil functioning, along with the relative abundance of specific phyla and classes, as a proxy for disease suppression. Overall, the use of biosolid as a sustainable soil amendment had positive effects not only on plant health and protection, but also on growth of non-pathogenic antagonistic microorganisms against Forl in the tomato rhizosphere and thus, on plant-soil microbiome interactions, toward biocontrol of Forl.
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Affiliation(s)
- Evangelia Stavridou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, 57001 Thessaloniki, Greece; (E.S.); (I.K.); (G.L.); (P.M.)
- Laboratory of Genetics and Plant Breeding, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ioannis Giannakis
- School of Civil Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.G.); (A.K.)
| | - Ioanna Karamichali
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, 57001 Thessaloniki, Greece; (E.S.); (I.K.); (G.L.); (P.M.)
| | - Nathalie N. Kamou
- Laboratory of Plant Pathology, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - George Lagiotis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, 57001 Thessaloniki, Greece; (E.S.); (I.K.); (G.L.); (P.M.)
| | - Panagiotis Madesis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, 57001 Thessaloniki, Greece; (E.S.); (I.K.); (G.L.); (P.M.)
- Laboratory of Molecular Biology of Plants, School of Agricultural Sciences, University of Thessaly, 38221 Volos, Greece
| | - Christina Emmanouil
- School of Spatial Planning and Development, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - Athanasios Kungolos
- School of Civil Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.G.); (A.K.)
| | - Irini Nianiou-Obeidat
- Laboratory of Genetics and Plant Breeding, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Anastasia L. Lagopodi
- Laboratory of Plant Pathology, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
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15
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Elsharkawy MM, Khedr AA, Mehiar F, El-Kady EM, Baazeem A, Shimizu M. Suppression of Pseudomonas syringae pv. tomato infection by rhizosphere fungi. PEST MANAGEMENT SCIENCE 2021; 77:4350-4356. [PMID: 33955671 DOI: 10.1002/ps.6468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 04/22/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Induced resistance against several plant pathogens was reported using different beneficial plant growth-promoting microorganisms. The potential of five fungal isolates, Trichoderma harzianum GT 3-2, Fusarium equiseti GF 18-3, F. equiseti GF 19-1, Phoma sp. GS 10-1 and Phoma sp. GS 14-1, to stimulate tomato growth and resistance against bacterial speck disease caused by Pseudomonas syringae pathovar (pv.) tomato DC3000 was evaluated. RESULTS Based on the results of disease severity and growth promotion experiments, GF 18-3 exhibited the best results among all fungal isolates. Treatment with barley grain inocula (BGI) and culture filtrate (CF) of the isolates promoted tomato growth and suppressed the pathogen in pot trials. Furthermore, expressions of the pathogenesis-related genes (PR-1, β-1,3-glucanase A, β-1,3-glucanase B and LOX) were relatively higher than the control in the leaves of tomato plants treated with both BGI and CF. The transcription levels remained consistently higher than the control plants for 6 days post-inoculation with pathogen. CONCLUSION Taken together, the results indicate that the tested fungal isolates have the potential to promote tomato growth and induce systemic resistance against the bacterial speck disease. Analysis of certain PR gene expression revealed significant activation in both BGI and CF treatments, leading to stimulated resistance against the pathogen. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Mohsen M Elsharkawy
- Department of Agricultural Botany, Faculty of Agriculture, Kafrelsheikh University, Kafr Elsheikh, Egypt
| | - Amr A Khedr
- Department of Agricultural Botany, Faculty of Agriculture, Kafrelsheikh University, Kafr Elsheikh, Egypt
| | - Farid Mehiar
- Department of Agricultural Botany, Faculty of Agriculture, Kafrelsheikh University, Kafr Elsheikh, Egypt
| | - Elsayed M El-Kady
- Department of Agricultural Botany, Faculty of Agriculture, Kafrelsheikh University, Kafr Elsheikh, Egypt
| | - Alaa Baazeem
- Department of Biology, College of Science, Taif University, Taif, Saudi Arabia
| | - Masafumi Shimizu
- Faculty of Applied Biological Sciences, Gifu University, Gifu-shi, Japan
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16
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Wang Y, Yao J, Xia X, Li Z, Zhou S, Liu W, Wu H. Genomic Sequence Resource of Kabatiella zeae, the Causative Pathogen of Corn Eyespot Disease. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:1223-1226. [PMID: 34142852 DOI: 10.1094/mpmi-04-21-0083-a] [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: 06/12/2023]
Abstract
Kabatiella zeae is the causative pathogen of corn eyespot disease, which is an important leaf disease that damages corn (Zea mays L.) worldwide. In this study, we provided an annotated draft of the assembled genome of the K. zeae field strain KZ1 through PacBio and Illumina sequencing. The assembled KZ1 genome size is 23,602,820 bp, and its GC content is 50.71%. The completeness of the assembled genome is 97.6% in this study. The assembly obtained in this study has 94 contigs and the length of N50 is 720,243 bp. This study is the first report of the K. zeae genome, which contributes to further research on the genetic variation and pathogenic mechanism of this important fungal pathogen.[Formula: see text] Copyright © 2021 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)
- Yafei Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, 440307, Shenzhen, China
| | - Jinai Yao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests/Institute of Plant Protection, Fujian Academy of Agricultural Sciences, 350013, Fuzhou, China
| | - Xinyao Xia
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
| | - Zhiqiang Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
| | - Shaoqun Zhou
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, 440307, Shenzhen, China
| | - Wende Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
| | - Hanxiang Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
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17
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Silicon and cadmium interaction of maize (Zea mays L.) plants cultivated in vitro. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00799-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Guo L, Yu H, Wang B, Vescio K, Delulio GA, Yang H, Berg A, Zhang L, Edel-Hermann V, Steinberg C, Kistler HC, Ma LJ. Metatranscriptomic Comparison of Endophytic and Pathogenic Fusarium-Arabidopsis Interactions Reveals Plant Transcriptional Plasticity. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:1071-1083. [PMID: 33856230 PMCID: PMC9048145 DOI: 10.1094/mpmi-03-21-0063-r] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Plants are continuously exposed to beneficial and pathogenic microbes, but how plants recognize and respond to friends versus foes remains poorly understood. Here, we compared the molecular response of Arabidopsis thaliana independently challenged with a Fusarium oxysporum endophyte Fo47 versus a pathogen Fo5176. These two F. oxysporum strains share a core genome of about 46 Mb, in addition to 1,229 and 5,415 unique accessory genes. Metatranscriptomic data reveal a shared pattern of expression for most plant genes (about 80%) in responding to both fungal inoculums at all timepoints from 12 to 96 h postinoculation (HPI). However, the distinct responding genes depict transcriptional plasticity, as the pathogenic interaction activates plant stress responses and suppresses functions related to plant growth and development, while the endophytic interaction attenuates host immunity but activates plant nitrogen assimilation. The differences in reprogramming of the plant transcriptome are most obvious in 12 HPI, the earliest timepoint sampled, and are linked to accessory genes in both fungal genomes. Collectively, our results indicate that the A. thaliana and F. oxysporum interaction displays both transcriptome conservation and plasticity in the early stages of infection, providing insights into the fine-tuning of gene regulation underlying plant differential responses to fungal endophytes and pathogens.[Formula: see text] Copyright © 2021 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)
- Li Guo
- MOE Key Laboratory for Intelligent Networks & Network Security, Faculty of Electronic and Information Engineering, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049 China
| | - Houlin Yu
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Bo Wang
- MOE Key Laboratory for Intelligent Networks & Network Security, Faculty of Electronic and Information Engineering, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049 China
| | - Kathryn Vescio
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Gregory A. Delulio
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - He Yang
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Andrew Berg
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Lili Zhang
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Véronique Edel-Hermann
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Christian Steinberg
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
| | - H. Corby Kistler
- USDA ARS Cereal Disease Laboratory, University of Minnesota, St. Paul, MN 55108, U.S.A
| | - Li-Jun Ma
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
- Corresponding author: L.-J. Ma;
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19
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Tian GL, Bi YM, Jiao XL, Zhang XM, Li JF, Niu FB, Gao WW. Application of vermicompost and biochar suppresses Fusarium root rot of replanted American ginseng. Appl Microbiol Biotechnol 2021; 105:6977-6991. [PMID: 34436649 DOI: 10.1007/s00253-021-11464-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 07/18/2021] [Accepted: 07/20/2021] [Indexed: 11/27/2022]
Abstract
Soil sterilization integrated with agronomic measures is an effective method to reduce soilborne replant diseases. However, the effect of vermicompost or biochar application after soil sterilization on soilborne diseases is poorly understood. A pot experiment was conducted in American ginseng to investigate the effects of vermicompost (VF), biochar (BF), and a combination of vermicompost and biochar (VBF) applied after soil sterilization on the incidence of Fusarium root rot using natural recovery (F) as control. After one growing season, the disease index of root rot, the phenolic acids, and the microbial communities of American ginseng rhizosphere soil were analyzed. The disease index of VF, BF, and VBF decreased by 33.32%, 19.03%, and 80.96%, respectively, compared with F. The highest bacterial richness and diversity were observed in the rhizosphere soil of VBF. Besides, VF and VBF significantly increased the relative abundance of beneficial bacteria (Pseudomonas, Lysobacter, and Chryseolinea) in the rhizosphere soil. Higher concentrations of vanillin, one of the phenolic acids in the roots exudates, were recorded in the rhizosphere soils of BF and VBF. The vanillin concentration showed a significant negative correlation with the disease index. To conclude, vermicompost improved the beneficial bacteria of the rhizosphere soil, while biochar regulated the allelopathic effect of the phenolic acids. The study proposes a combined application of biochar and vermicompost to the rhizosphere soil to control Fusarium root rot of replanted American ginseng effectively. KEY POINTS: Vermicompost improves the relative abundance of rhizosphere beneficial bacteria. Biochar inhibits the degradation of phenolic acids by adsorption. The combination of vermicompost and biochar enhances the disease control effect.
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Affiliation(s)
- Gei-Lin Tian
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
- College of Agricultural and Biological Engineering, Heze University, Shandong Province, Heze, 274000, China
| | - Yan-Meng Bi
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, 300384, China
| | - Xiao-Lin Jiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Xi-Mei Zhang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Jun-Fei Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Fang-Bing Niu
- College of Business Administration, Heze University, Shandong Province, Heze, 274000, China
| | - Wei-Wei Gao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
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20
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Gonçalves DR, Pena R, Zotz G, Albach DC. Effects of fungal inoculation on the growth of Salicornia (Amaranthaceae) under different salinity conditions. Symbiosis 2021. [DOI: 10.1007/s13199-021-00783-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AbstractEndophytic fungi are known to be present in roots of salt marsh plants, but their ecological role in this symbiosis is still largely unknown. Generally considered parasitic or saprophytic, they may still be mutualistic, at least under certain circumstances. Among salt marsh plants, Salicornia spp. are recognized as particularly salt-tolerant and their frequent colonization by root endophytes has also been reported. This study aimed to investigate whether the inoculation of Salicornia with different root endophytes isolated from field-collected Salicornia affects biomass production, nutrient uptake and photosynthesis (assessed via chlorophyll fluorescence). In addition, we investigated whether fungal inoculation confers tolerance to salt stress given that endophytes are suggested to increase salt tolerance and improve plant fitness in other less salt-tolerant plants. The inoculation of Salicornia with an isolate of the genus Stemphylium positively influenced total biomass production and nitrogen concentration in roots at optimum salinity condition (150 mM NaCl). However, under salt stress (650 mM NaCl), no significant effects of fungal inoculation on biomass production and photosynthesis were observed. Further, positive and negative effects of fungal inoculation on nutrient concentrations were observed in roots and shoots, respectively. Our results indicate that different endophytic fungi and their interaction result in distinct fungal species-specific plant growth responses of Salicornia under different growth conditions.
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21
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Andreadelli A, Petrakis S, Tsoureki A, Tsiolas G, Michailidou S, Baltzopoulou P, van Merkestein R, Hodgson P, Sceats M, Karagiannakis G, Makris AM. Effects of Magnesium Oxide and Magnesium Hydroxide Microparticle Foliar Treatment on Tomato PR Gene Expression and Leaf Microbiome. Microorganisms 2021; 9:microorganisms9061217. [PMID: 34199815 PMCID: PMC8228823 DOI: 10.3390/microorganisms9061217] [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: 04/19/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 11/20/2022] Open
Abstract
Recently, metal oxides and magnesium hydroxide nanoparticles (NPs) with high surface-to-volume ratios were shown to possess antibacterial properties with applications in biomedicine and agriculture. To assess recent observations from field trials on tomatoes showing resistance to pathogen attacks, porous micron-scale particles composed of nano-grains of MgO were hydrated and sprayed on the leaves of healthy tomato (Solanum lycopersicum) plants in a 20-day program. The results showed that the spray induced (a) a modest and selective stress gene response that was consistent with the absence of phytotoxicity and the production of salicylic acid as a signalling response to pathogens; (b) a shift of the phylloplane microbiota from near 100% dominance by Gram (−) bacteria, leaving extremophiles and cyanobacteria to cover the void; and (c) a response of the fungal leaf phylloplane that showed that the leaf epiphytome was unchanged but the fungal load was reduced by about 70%. The direct microbiome changes together with the low level priming of the plant’s immune system may explain the previously observed resistance to pathogen assaults in field tomato plants sprayed with the same hydrated porous micron-scale particles.
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Affiliation(s)
- Aggeliki Andreadelli
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (A.A.); (S.P.); (A.T.); (G.T.); (S.M.)
| | - Spyros Petrakis
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (A.A.); (S.P.); (A.T.); (G.T.); (S.M.)
| | - Antiopi Tsoureki
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (A.A.); (S.P.); (A.T.); (G.T.); (S.M.)
| | - George Tsiolas
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (A.A.); (S.P.); (A.T.); (G.T.); (S.M.)
| | - Sofia Michailidou
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (A.A.); (S.P.); (A.T.); (G.T.); (S.M.)
| | - Penelope Baltzopoulou
- Chemical Process & Energy Resources Institute, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (P.B.); (G.K.)
| | | | - Philip Hodgson
- Calix Limited, Pymble, NSW 2073, Australia; (R.v.M.); (P.H.); (M.S.)
| | - Mark Sceats
- Calix Limited, Pymble, NSW 2073, Australia; (R.v.M.); (P.H.); (M.S.)
| | - George Karagiannakis
- Chemical Process & Energy Resources Institute, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (P.B.); (G.K.)
| | - Antonios M. Makris
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece; (A.A.); (S.P.); (A.T.); (G.T.); (S.M.)
- Correspondence: ; Tel.: +30-2311-257-541
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22
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Samaras A, Roumeliotis E, Ntasiou P, Karaoglanidis G. Bacillus subtilis MBI600 Promotes Growth of Tomato Plants and Induces Systemic Resistance Contributing to the Control of Soilborne Pathogens. PLANTS 2021; 10:plants10061113. [PMID: 34072940 PMCID: PMC8229581 DOI: 10.3390/plants10061113] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/26/2021] [Accepted: 05/26/2021] [Indexed: 11/16/2022]
Abstract
Bacillus subtilis MBI600 (Bs MBI600) is a recently commercialized plant-growth-promoting rhizobacterium (PGPR). In this study, we investigated the effects of Bs MBI600 on the growth of tomato and its biocontrol efficacy against three main soilborne tomato pathogens (Rhizoctonia solani, Pythium ultimum, and Fusarium oxysporum f.sp. radicis-lycopersici-Forl). Furthermore, the root colonization ability of the Bs MBI600 strain on tomato roots was analyzed in vivo with a yellow fluorescence protein (yfp)-labeled strain, revealing strong colonization ability, which was affected by the root growth substrate. The application of Bs MBI600 on tomato plants resulted in significant increases in shoot and root lengths. Transcriptional activation of two auxin-related genes (SiPin6 and SiLax4) was observed. Single applications of Bs MBI600 on inoculated tomato plants with pathogens revealed satisfactory control efficacy compared to chemical treatment. Transcriptomic analysis of defense-related genes used as markers of the salicylic acid (SA) signaling pathway (PR-1A and GLUA) or jasmonic acid/ethylene (JA/ET) signaling pathway (CHI3, LOXD, and PAL) showed increased transcription patterns in tomato plants treated with Bs MBI600 or Forl. These results indicate the biochemical and molecular mechanisms that are activated after the application of Bs MBI600 on tomato plants and suggest that induction of systemic resistance (ISR) occurred.
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Affiliation(s)
- Anastasios Samaras
- Plant Pathology Laboratory, Forestry and Natural Environment, Faculty of Agriculture, Aristotle University of Thessaloniki, P.O. Box 269, 54124 Thessaloniki, Greece; (A.S.); (P.N.)
| | - Efstathios Roumeliotis
- Department of Agriculture, Theodoropoulou Terma, University of Patras, 27200 Amaliada, Greece;
| | - Panagiota Ntasiou
- Plant Pathology Laboratory, Forestry and Natural Environment, Faculty of Agriculture, Aristotle University of Thessaloniki, P.O. Box 269, 54124 Thessaloniki, Greece; (A.S.); (P.N.)
| | - George Karaoglanidis
- Plant Pathology Laboratory, Forestry and Natural Environment, Faculty of Agriculture, Aristotle University of Thessaloniki, P.O. Box 269, 54124 Thessaloniki, Greece; (A.S.); (P.N.)
- Correspondence:
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23
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The Non-Pathogenic Fusarium oxysporum Fo47 Induces Distinct Responses in Two Closely Related Solanaceae Plants against the Pathogen Verticillium dahliae. J Fungi (Basel) 2021; 7:jof7050344. [PMID: 33925134 PMCID: PMC8146752 DOI: 10.3390/jof7050344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/24/2021] [Accepted: 04/27/2021] [Indexed: 11/16/2022] Open
Abstract
The non-pathogenic Fusarium oxysporum Fo47 is able to protect Capsicum annuum (pepper) but not in Solanum lycopersicum (tomato) against the pathogen Verticillium dahliae. Transcriptomics of the plant during the interaction with Fo47 shows the induction of distinct set of genes in pepper and tomato. The number of differentially expressed (DE) genes in pepper (231 DE genes) is greater than the number of DE genes in tomato (39 DE genes) at 2 days after the treatment with Fo47. Ethylene related genes were present among the DE genes in both plants, and the up-regulation of ethylene biosynthetic genes was observed to be triggered during the interaction of both plants with Fo47. The treatment with MCP (1-Methylcyclopropene, an ethylene-competitive inhibitor) reduced the Fo47 protection in pepper against Verticillium dahliae. Intriguingly, Fo47 was able to protect the ethylene-insensitive tomato mutant Never-ripe (Nr) against Verticillium dahliae, but not the tomato wilt type cv Pearson. Overall, ethylene is shown to be an important player in the response to Fo47, but its role depends on the host species.
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24
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Babilonia K, Wang P, Liu Z, Jamieson P, Mormile B, Rodrigues O, Zhang L, Lin W, Danmaigona Clement C, Menezes de Moura S, Alves-Ferreira M, Finlayson SA, Loring Nichols R, Wheeler TA, Dever JK, Shan L, He P. A nonproteinaceous Fusarium cell wall extract triggers receptor-like protein-dependent immune responses in Arabidopsis and cotton. THE NEW PHYTOLOGIST 2021; 230:275-289. [PMID: 33314087 DOI: 10.1111/nph.17146] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Fusarium wilt caused by the ascomycete fungus Fusarium oxysporum is a devastating disease of many economically important crops. The mechanisms underlying plant responses to F. oxysporum infections remain largely unknown. We demonstrate here that a water-soluble, heat-resistant and nonproteinaceous F. oxysporum cell wall extract (FoCWE) component from multiple F. oxysporum isolates functions as a race-nonspecific elicitor, also termed pathogen-associated molecular pattern (PAMP). FoCWE triggers several demonstrated immune responses, including mitogen-activated protein (MAP) kinase phosphorylation, reactive oxygen species (ROS) burst, ethylene production, and stomatal closure, in cotton and Arabidopsis. Pretreated FoCWE protects cotton seeds against infections by virulent F. oxysporum f. sp. vasinfectum (Fov), and Arabidopsis plants against the virulent bacterium, Pseudomonas syringae, suggesting the potential application of FoCWEs in crop protection. Host-mediated responses to FoCWE do not appear to require LYKs/CERK1, BAK1 or SOBIR1, which are commonly involved in PAMP perception and/or signalling. However, FoCWE responses and Fusarium resistance in cotton partially require two receptor-like proteins, GhRLP20 and GhRLP31. Transcriptome analysis suggests that FoCWE preferentially activates cell wall-mediated defence, and Fov has evolved virulence mechanisms to suppress FoCWE-induced defence. These findings suggest that FoCWE is a classical PAMP that is potentially recognised by a novel pattern-recognition receptor to regulate cotton resistance to Fusarium infections.
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Affiliation(s)
- Kevin Babilonia
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
- Molecular and Environmental Plant Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Ping Wang
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
| | - Zunyong Liu
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Pierce Jamieson
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
| | - Brendan Mormile
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
| | - Olivier Rodrigues
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
| | - Lin Zhang
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
| | - Wenwei Lin
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
| | | | - Stéfanie Menezes de Moura
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
- Department of Genetics, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, R.J. 21941, Brazil
| | - Marcio Alves-Ferreira
- Department of Genetics, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, R.J. 21941, Brazil
| | - Scott A Finlayson
- Molecular and Environmental Plant Sciences, Texas A&M University, College Station, TX, 77843, USA
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Robert Loring Nichols
- Agricultural and Environmental Sciences, Cotton Incorporated, 6399 Weston Parkway, Cary, NC, 27513, USA
| | - Terry A Wheeler
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
- Texas A&M AgriLife Research, 1102 East Drew St., Lubbock, TX, 79403, USA
| | - Jane K Dever
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, 77843, USA
- Texas A&M AgriLife Research, 1102 East Drew St., Lubbock, TX, 79403, USA
| | - Libo Shan
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
- Molecular and Environmental Plant Sciences, Texas A&M University, College Station, TX, 77843, USA
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, 77843, USA
| | - Ping He
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843, USA
- Molecular and Environmental Plant Sciences, Texas A&M University, College Station, TX, 77843, USA
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25
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Mastan A, Rane D, Dastager SG, Vivek Babu CS. Molecular insights of fungal endophyte co-inoculation with Trichoderma viride for the augmentation of forskolin biosynthesis in Coleus forskohlii. PHYTOCHEMISTRY 2021; 184:112654. [PMID: 33461046 DOI: 10.1016/j.phytochem.2021.112654] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 06/12/2023]
Abstract
To understand the compatibility of three native endophytic fungi Phialemoniopsis cornearis (SF1), Macrophomina pseudophaseolina (SF2) and Fusarium redolens (RF1) with Trichoderma viride (TV1) on Coleus forskohlii in enhancing plant growth and forskolin content, field experiments were conducted. Co-inoculation of RF1+TV1 showed significant improvement in plant growth (52%), root biomass (67%), and in-planta forskolin content (94%), followed by treatment with SF2+TV1 and SF1+TV1. qRT-PCR was carried out to quantify expression of five key forskolin biosynthetic pathway genes (CfTPS2, CfTPS3, CfTPS4, CfCYP76AH15, and CfACT1-8) in RF1+TV1 treated C. forskohlii plants. Elevated expression of CfTPS2, CfTPS4, CfCYP76AH15 and CfACT1-8 genes was observed with RF1+TV1 combination as compared to uninoculated C. forskohlii plants. Besides, RF1+TV1 treatment considerably reduced the severity of nematode infection of C. forskohlii plants under field conditions. Thus, congruent properties of F. redolens (RF1) were witnessed with co-inoculation of T. viride (TV1) under field conditions which resulted in enhanced forskolin content, root biomass, and reduced nematode infections in C. forskohlii. Overall, this approach could be an economical and sustainable step towards cultivation of commercially important medicinal plants.
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Affiliation(s)
- Anthati Mastan
- Microbial Technology Laboratory, CSIR- Central Institute of Medicinal and Aromatic Plants, Research Center, Bangalore, 560065, India; Academy of Scientific and Innovative Research, CSIR-CIMAP Campus, Lucknow, Uttar Pradesh, 226015, India
| | - Digeshwar Rane
- NCIM Resource Center, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Syed G Dastager
- NCIM Resource Center, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - C S Vivek Babu
- Microbial Technology Laboratory, CSIR- Central Institute of Medicinal and Aromatic Plants, Research Center, Bangalore, 560065, India; Academy of Scientific and Innovative Research, CSIR-CIMAP Campus, Lucknow, Uttar Pradesh, 226015, India; Present address: Food Protectants & Infestation Control (FPIC) Department, CSIR-Central Food Technological Research Institute (CSIR-CFTRI), Mysuru, 570 020, Karnataka, India.
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26
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Evaluation of Mycotoxin Production and Phytopathogenicity of the Entomopathogenic Fungi Fusarium caatingaense and F. pernambucanum from Brazil. Curr Microbiol 2021; 78:1218-1226. [PMID: 33625571 DOI: 10.1007/s00284-021-02387-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 02/07/2021] [Indexed: 12/11/2022]
Abstract
Fusarium incarnatum-equiseti species complex (FIESC) is considered as one of the richest insecticolous species. Fusarium species synthesize toxic secondary metabolites that are not fully understood. Mycotoxin production and pathogenicity on germinating seeds, seedlings, and leaves must be carefully studied for the use of Fusarium species in the biological control of insect pests. In this study, we evaluated the mycotoxin production and phytopathogenic potential of entomopathogenic strains of Fusarium sulawesiensis (1), F. pernambucanum (3), and F. caatingaense (23). The phytopathogenicity tests of F. caatingaense (URM 6776, URM 6777, URM 6778, URM 6779, and URM 6782) were performed during the development of bean (Phaseolus vulgaris, Vigna unguiculata, and Phaseolus lunatus), and corn (Zea mays) seedlings, using four treatments (soil infestation with the inoculum, spraying on leaves, root dip, and negative control). The mycotoxins, monoacetyl-deoxynivalenols (AcDON), deoxynivalenol (DON), beauvericin (BEA), fusarenone-X (FUS), T-2 toxin (T2), diacetoxyscirpenol (DAS), and zearalenone (ZEA), were detected in the study; BEA (detected in 25 strains) and FUS (detected in 21 strains) were found to be predominant. None of the strains showed any ability to cause disease or virulence in beans and corn. The FIESC strains showed a highly variable production of mycotoxins without the potential to be used as phytopathogenic agents for the cultures tested.
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27
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Arazoe T. CRISPR-based pathogenic fungal genome editing for control of infection and disease. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2021; 179:161-196. [PMID: 33785176 DOI: 10.1016/bs.pmbts.2020.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fungi play important roles in many aspects of human life, such as in various food, beverage, agricultural, chemical, and pharmaceutical industries. Meanwhile, some fungal species cause several severe diseases in plants, humans and animals. Fungal and fungal-like diseases pose a severe threat to human health, food security, and ecosystem health worldwide. This chapter introduces CRISPR-based genome editing technologies for pathogenic fungi and their application in controlling fungal diseases.
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Affiliation(s)
- Takayuki Arazoe
- Faculty of Science and Technology, Department of Applied Biological Science, Tokyo University of Science, Noda-shi, Chiba, Japan.
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28
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de Lamo FJ, Šimkovicová M, Fresno DH, de Groot T, Tintor N, Rep M, Takken FLW. Pattern-triggered immunity restricts host colonization by endophytic fusaria, but does not affect endophyte-mediated resistance. MOLECULAR PLANT PATHOLOGY 2021; 22:204-215. [PMID: 33205901 PMCID: PMC7814963 DOI: 10.1111/mpp.13018] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/17/2020] [Accepted: 10/21/2020] [Indexed: 05/06/2023]
Abstract
Fusarium oxysporum (Fo) is best known as a host-specific vascular pathogen causing major crop losses. Most Fo strains, however, are root endophytes potentially conferring endophyte-mediated resistance (EMR). EMR is a mechanistically poorly understood root-specific induced resistance response induced by endophytic or nonhost pathogenic Fo strains. Like other types of induced immunity, such as systemic acquired resistance or induced systemic resistance, EMR has been proposed to rely on the activation of the pattern-triggered immunity (PTI) system of the plant. PTI is activated upon recognition of conserved microbe-associated molecular patterns (MAMPs) of invading microbes. Here, we investigated the role of PTI in controlling host colonization by Fo endophytes and their ability to induce EMR to the tomato pathogen Fo f. sp. lycopersici (Fol). Transgenic tomato and Arabidopsis plants expressing the Fo effector gene Avr2 are hypersusceptible to bacterial and fungal infection. Here we show that these plants are PTI-compromised and are nonresponsive to bacterial- (flg22) and fungal- (chitosan) MAMPs. We challenged the PTI-compromised tomato mutants with the EMR-conferring Fo endophyte Fo47, the nonhost pathogen Fom (a melon pathogen), and with Fol. Compared to wild-type plants, Avr2-tomato plants became hypercolonized by Fo47 and Fom. Surprisingly, however, EMR towards Fol, induced by either Fo47 or Fom, was unaffected in these plants. These data show that EMR-based disease resistance is independent from the conventional defence pathways triggered by PTI, but that PTI is involved in restricting host colonization by nonpathogenic Fo isolates.
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Affiliation(s)
- Francisco J. de Lamo
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
| | - Margarita Šimkovicová
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
| | - David H. Fresno
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
| | - Tamara de Groot
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
| | - Nico Tintor
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
| | - Martijn Rep
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
| | - Frank L. W. Takken
- Molecular Plant PathologyFaculty of ScienceSwammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdamNetherlands
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29
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Secretion-Based Modes of Action of Biocontrol Agents with a Focus on Pseudozyma aphidis. PLANTS 2021; 10:plants10020210. [PMID: 33499173 PMCID: PMC7912694 DOI: 10.3390/plants10020210] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/19/2021] [Accepted: 01/19/2021] [Indexed: 01/18/2023]
Abstract
Plant pathogens challenge our efforts to maximize crop production due to their ability to rapidly develop resistance to pesticides. Fungal biocontrol agents have become an important alternative to chemical fungicides, due to environmental concerns related to the latter. Here we review the complex modes of action of biocontrol agents in general and epiphytic yeasts belonging to the genus Pseudozyma specifically and P. aphidis in particular. Biocontrol agents act through multiple direct and indirect mechanisms, which are mainly based on their secretions. We discuss the direct modes of action, such as antibiosis, reactive oxygen species-producing, and cell wall-degrading enzyme secretions which can also play a role in mycoparasitism. In addition, we discuss indirect modes of action, such as hyperbiotrophy, induced resistance and growth promotion based on the secretion of effectors and elicitors from the biocontrol agent. Due to their unique characteristics, epiphytic yeasts hold great potential for use as biocontrol agents, which may be more environmentally friendly than conventional pesticides and provide a way to reduce our dependency on fungicides based on increasingly expensive fossil fuels. No less important, the complex mode of action of Pseudozyma-based biocontrol agents can also reduce the frequency of resistance developed by pathogens to these agents.
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30
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Tan J, Ameye M, Landschoot S, De Zutter N, De Saeger S, De Boevre M, Abdallah MF, Van der Lee T, Waalwijk C, Audenaert K. At the scene of the crime: New insights into the role of weakly pathogenic members of the fusarium head blight disease complex. MOLECULAR PLANT PATHOLOGY 2020; 21:1559-1572. [PMID: 32977364 PMCID: PMC7694684 DOI: 10.1111/mpp.12996] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 05/13/2023]
Abstract
Plant diseases are often caused by a consortium of pathogens competing with one another to gain a foothold in the infection niche. Nevertheless, studies are often limited to a single pathogen on its host. In Europe, fusarium head blight (FHB) of wheat is caused by multiple Fusarium species, including Fusarium graminearum and F. poae. Here, we combined a time series of (co)inoculations, monitored by multispectral imaging, transcriptional, and mycotoxin analyses, to study the temporal interaction between both species and wheat. Our results showed coinoculation of F. graminearum and F. poae inhibited symptom development but did not alter mycotoxin accumulation compared to a single inoculation with F. graminearum. In contrast, preinoculation of F. poae reduced both FHB symptoms and mycotoxin levels compared to a single F. graminearum infection. Interestingly, F. poae exhibited increased growth in dual infections, demonstrating that this weak pathogen takes advantage of its co-occurrence with F. graminearum. Quantitative reverse transcription PCR revealed that F. poae induces LOX and ICS gene expression in wheat. We hypothesize that the early induction of salicylic and jasmonic acid-related defences by F. poae hampers a subsequent F. graminearum infection. This study is the first to report on the defence mechanisms of the plant involved in a tripartite interaction between two species of a disease complex and their host.
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Affiliation(s)
- Jiang Tan
- Laboratory of Applied Mycology and PhenomicsDepartment of Plants and CropsFaculty of Bioscience EngineeringGhent UniversityGhentBelgium
| | - Maarten Ameye
- Laboratory of Applied Mycology and PhenomicsDepartment of Plants and CropsFaculty of Bioscience EngineeringGhent UniversityGhentBelgium
| | - Sofie Landschoot
- Laboratory of Applied Mycology and PhenomicsDepartment of Plants and CropsFaculty of Bioscience EngineeringGhent UniversityGhentBelgium
| | - Noémie De Zutter
- Laboratory of Applied Mycology and PhenomicsDepartment of Plants and CropsFaculty of Bioscience EngineeringGhent UniversityGhentBelgium
| | - Sarah De Saeger
- Centre of Excellence in Mycotoxicology and Public HealthDepartment of BioanalysisFaculty of Pharmaceutical SciencesGhent UniversityGhentBelgium
| | - Marthe De Boevre
- Centre of Excellence in Mycotoxicology and Public HealthDepartment of BioanalysisFaculty of Pharmaceutical SciencesGhent UniversityGhentBelgium
| | - Mohamed F. Abdallah
- Laboratory of Applied Mycology and PhenomicsDepartment of Plants and CropsFaculty of Bioscience EngineeringGhent UniversityGhentBelgium
- Centre of Excellence in Mycotoxicology and Public HealthDepartment of BioanalysisFaculty of Pharmaceutical SciencesGhent UniversityGhentBelgium
| | | | - Cees Waalwijk
- Wageningen University and Research CentreWageningenNetherlands
| | - Kris Audenaert
- Laboratory of Applied Mycology and PhenomicsDepartment of Plants and CropsFaculty of Bioscience EngineeringGhent UniversityGhentBelgium
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31
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Jaber R, Planchon A, Mathieu-Rivet E, Kiefer-Meyer MC, Zahid A, Plasson C, Pamlard O, Beaupierre S, Trouvé JP, Guillou C, Driouich A, Follet-Gueye ML, Mollet JC. Identification of two compounds able to improve flax resistance towards Fusarium oxysporum infection. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 301:110690. [PMID: 33218648 DOI: 10.1016/j.plantsci.2020.110690] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/17/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
Plants are surrounded by a diverse range of microorganisms that causes serious crop losses and requires the use of pesticides. Flax is a major crop in Normandy used for its fibres and is regularly challenged by the pathogenic fungus Fusarium oxysporum (Fo) f. sp. lini. To protect themselves, plants use "innate immunity" as a first line of defense level against pathogens. Activation of plant defense with elicitors could be an alternative for crop plant protection. A previous work was conducted by screening a chemical library and led to the identification of compounds able to activate defense responses in Arabidopsis thaliana. Four compounds were tested for their abilities to improve resistance of two flax varieties against Fo. Two of them, one natural (holaphyllamine or HPA) and one synthetic (M4), neither affected flax nor Fo growth. HPA and M4 induced oxidative burst and callose deposition. Furthermore, HPA and M4 caused changes in the expression patterns of defense-related genes coding a glucanase and a chitinase-like. Finally, plants pre-treated with HPA or M4 exhibited a significant decrease in the disease symptoms. Together, these findings demonstrate that HPA and M4 are able to activate defense responses in flax and improve its resistance against Fo infection.
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Affiliation(s)
- Rim Jaber
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
| | - Aline Planchon
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
| | - Elodie Mathieu-Rivet
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
| | | | - Abderrakib Zahid
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
| | - Carole Plasson
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
| | - Olivier Pamlard
- Unité de catalyse et chimie du solide, UMR CNRS 8181, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Sandra Beaupierre
- Institut de Chimie des Substances Naturelles, UPR CNRS 2301, Université Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France.
| | | | - Catherine Guillou
- Institut de Chimie des Substances Naturelles, UPR CNRS 2301, Université Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France.
| | - Azeddine Driouich
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
| | - Marie-Laure Follet-Gueye
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France; Normandie Univ, UNIROUEN, PRIMACEN, IRIB, 76000, Rouen, France.
| | - Jean-Claude Mollet
- Normandie Univ, UNIROUEN, Glyco-MEV, EA4358, SFR NORVEGE FED 4277, I2C Carnot, IRIB, 76000, Rouen, France.
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Fujikawa I, Takehara Y, Ota M, Imada K, Sasaki K, Kajihara H, Sakai S, Jogaiah S, Ito SI. Magnesium oxide induces immunity against Fusarium wilt by triggering the jasmonic acid signaling pathway in tomato. J Biotechnol 2020; 325:100-108. [PMID: 33186662 DOI: 10.1016/j.jbiotec.2020.11.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 12/21/2022]
Abstract
Fusarium wilt, caused by Fusarium oxysporum f. sp. lycopersici (FOL), is a worldwide tomato disease. Although Fusarium wilt management remains unsuccessful, enhancing host FOL resistance using magnesium oxide to activate plant immunity may enable effective control. We demonstrated that MgO-pretreatment of roots induced FOL resistance in susceptible tomato plants. Resistance was not induced in tomato mutants deficient in the jasmonic acid (JA) signaling pathway, whereas the opposite trend was observed in mutants deficient in the salicylic acid and ethylene signaling pathways, suggesting that JA signaling activation is essential for MgO-induced FOL immunity. Quantitative real-time polymerase chain reaction analysis of MgO-pretreated tomato plants, and challenge-inoculated with FOL, revealed that MYELOCYTOMATOSIS ONCOGENE HOMOLOG 2 (MYC2), the master regulator of JA signaling, as well as MYC2-targeted transcription factors that directly regulate the JA-induced transcription of late defense genes and their downstream wound-responsive genes were preferentially upregulated in both roots and stems. Moreover, in MgO-pretreated tomato plants challenge-inoculated with FOL, the late wound-responsive THREONINE DEAMINASE 2 (TD) gene was expressed earlier than its upstream genes, including MYC2, suggesting that a primed state for defense was established in MgO-pretreated plants. We conclude that MgO is a promising agent for the control of Fusarium wilt.
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Affiliation(s)
- Isamu Fujikawa
- Department of Biological and Environmental Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - Yushi Takehara
- Department of Biological and Environmental Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - Makiko Ota
- Department of Biological and Environmental Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - Kiyoshi Imada
- Department of Biological and Environmental Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - Kazunori Sasaki
- Department of Biological and Environmental Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8515, Japan; Research Center for Thermotolerant Microbial Resources (RCTMR), Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - Hiroshi Kajihara
- Yamaguchi Prefectural Agriculture and Forestry General Engineering Center, Yamaguchi, Yamaguchi, 753-0214, Japan
| | - Shoji Sakai
- Yamaguchi TLO, Ube, Yamaguchi, 755-8611, Japan
| | - Sudisha Jogaiah
- Laboratory of Plant Healthcare and Diagnostics, PG Department of Studies in Biotechnology and Microbiology, Karnatak University, Pavate Nagar, Dharwad, Karnataka, 580 003, India
| | - Shin-Ichi Ito
- Department of Biological and Environmental Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8515, Japan; Research Center for Thermotolerant Microbial Resources (RCTMR), Yamaguchi University, Yamaguchi, 753-8515, Japan.
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Wang B, Yu H, Jia Y, Dong Q, Steinberg C, Alabouvette C, Edel-Hermann V, Kistler HC, Ye K, Ma LJ, Guo L. Chromosome-Scale Genome Assembly of Fusarium oxysporum Strain Fo47, a Fungal Endophyte and Biocontrol Agent. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2020; 33:1108-1111. [PMID: 32552518 DOI: 10.1094/mpmi-05-20-0116-a] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Here, we report a chromosome-level genome assembly of Fusarium oxysporum Fo47 (12 pseudomolecules; contig N50: 4.52 Mb), generated using a combination of PacBio long-read, Illumina paired end, and high-throughput chromosome conformation capture sequencing data. Although F. oxysporum causes vascular wilt to over 100 plant species, the strain Fo47 is classified as an endophyte and is widely used as a biocontrol agent for plant disease control. The Fo47 genome carries a single accessory chromosome of 4.23 Mb, compared with the reference genome of F. oxysporum f. sp. lycopersici Fol4287. The high-quality assembly and annotation of the Fo47 genome will be a valuable resource for studying the mechanisms underlying the endophytic interactions between F. oxysporum and plants as well as for deciphering the genome evolution of the F. oxysporum species complex.
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Affiliation(s)
- Bo Wang
- MOE Key Laboratory for Intelligent Networks & Network Security, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Houlin Yu
- Graduate Program of Plant Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Yanyan Jia
- MOE Key Laboratory for Intelligent Networks & Network Security, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Quanbin Dong
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049 China
| | - Christian Steinberg
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Claude Alabouvette
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Veronique Edel-Hermann
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
| | - H Corby Kistler
- USDA ARS Cereal Disease Laboratory, University of Minnesota, St. Paul, MN 55108, U.S.A
| | - Kai Ye
- MOE Key Laboratory for Intelligent Networks & Network Security, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049 China
| | - Li-Jun Ma
- Graduate Program of Plant Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, U.S.A
| | - Li Guo
- MOE Key Laboratory for Intelligent Networks & Network Security, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049 China
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Abdelrazek S, Choudhari S, Thimmapuram J, Simon P, Colley M, Mengiste T, Hoagland L. Changes in the core endophytic mycobiome of carrot taproots in response to crop management and genotype. Sci Rep 2020; 10:13685. [PMID: 32792547 PMCID: PMC7426841 DOI: 10.1038/s41598-020-70683-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/30/2020] [Indexed: 12/24/2022] Open
Abstract
Fungal endophytes can influence production and post-harvest challenges in carrot, though the identity of these microbes as well as factors affecting their composition have not yet been determined, which prevents growers from managing these organisms to improve crop performance. Consequently, we characterized the endophytic mycobiome in the taproots of three carrot genotypes that vary in resistance to two pathogens grown in a trial comparing organic and conventional crop management using Illumina sequencing of the internal transcribed spacer (ITS) gene. A total of 1,480 individual operational taxonomic units (OTUs) were identified. Most were consistent across samples, indicating that they are part of a core mycobiome, though crop management influenced richness and diversity, likely in response to differences in soil properties. There were also differences in individual OTUs among genotypes and the nematode resistant genotype was most responsive to management system indicating that it has greater control over its endophytic mycobiome, which could potentially play a role in resistance. Members of the Ascomycota were most dominant, though the exact function of most taxa remains unclear. Future studies aimed at overcoming difficulties associated with isolating fungal endophytes are needed to identify these microbes at the species level and elucidate their specific functional roles.
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Affiliation(s)
- Sahar Abdelrazek
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, USA
| | - Sulbha Choudhari
- Advanced Biomedical and Computational Sciences, Frederick National Laboratory for Cancer Research, Frederick, MD, USA.,Bioinformatics Core, Purdue University, West Lafayette, IN, USA
| | | | - Philipp Simon
- USDA-ARS Agriculture Research Service, Madison, WI, USA
| | | | - Tesfaye Mengiste
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, USA
| | - Lori Hoagland
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, USA.
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Elsharkawy M, Derbalah A, Hamza A, El-Shaer A. Zinc oxide nanostructures as a control strategy of bacterial speck of tomato caused by Pseudomonas syringae in Egypt. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:19049-19057. [PMID: 30484042 DOI: 10.1007/s11356-018-3806-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/19/2018] [Indexed: 06/09/2023]
Abstract
This study was conducted to evaluate the ability of zinc oxide nanoparticles (ZONPs) with unique properties to protect tomato against the bacterial speck pathogen, caused by Pseudomonas syringae pv. tomato DC3000 (Pst). Protection of tomato against bacterial speck using ZONPS was evaluated by its direct antibacterial activity and its ability for inducing resistance in tomato plants. The results revealed that ZONPs showed significant direct antibacterial activity against Pseudomonas syringae pv. tomato under laboratory conditions. Moreover, tomato plants treated with ZONPs showed a significant reduction in disease severity and bacterial proliferation relative to non-treated plants. Furthermore, tomato plants treated with ZONPs showed higher self-defense enzyme activity relative to untreated plants. The regulatory and defense genes, LePR-1a and Lipoxygenase (LOX), involved in the salicylic acid (SA) and (JA) signaling pathways, respectively, were highly expressed in tomato plants treated with ZONPs compared to untreated plants. Growth characters of tomato plants treated with ZONPs were significantly enhanced relative to untreated plants. The control of bacterial speck pathogen of tomato using ZONPs through its direct antibacterial and by developing of systemic resistance in treated tomatoes against the pathogen is considered the first report.
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Affiliation(s)
- Mohsen Elsharkawy
- Agricultural Botany Department, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt
| | - Aly Derbalah
- Pesticides Chemistry and Toxicology Department, Faculty of Agriculture, Kafrelsheikh University, Kafresheikh, 33516, Egypt.
| | - Amany Hamza
- Pesticides Chemistry and Toxicology Department, Faculty of Agriculture, Kafrelsheikh University, Kafresheikh, 33516, Egypt
| | - Abdelhamid El-Shaer
- Physics Department, Faculty of Science, Kafreleheikh University, Kafrelsheikh, 33516, Egypt
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Zarkani AA, López-Pagán N, Grimm M, Sánchez-Romero MA, Ruiz-Albert J, Beuzón CR, Schikora A. Salmonella Heterogeneously Expresses Flagellin during Colonization of Plants. Microorganisms 2020; 8:microorganisms8060815. [PMID: 32485895 PMCID: PMC7355505 DOI: 10.3390/microorganisms8060815] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/26/2020] [Accepted: 05/27/2020] [Indexed: 12/19/2022] Open
Abstract
Minimally processed or fresh fruits and vegetables are unfortunately linked to an increasing number of food-borne diseases, such as salmonellosis. One of the relevant virulence factors during the initial phases of the infection process is the bacterial flagellum. Although its function is well studied in animal systems, contradictory results have been published regarding its role during plant colonization. In this study, we tested the hypothesis that Salmonella's flagellin plays a versatile function during the colonization of tomato plants. We have assessed the persistence in plant tissues of a Salmonella enterica wild type strain, and of a strain lacking the two flagellins, FljB and FliC. We detected no differences between these strains concerning their respective abilities to reach distal, non-inoculated parts of the plant. Analysis of flagellin expression inside the plant, at both the population and single cell levels, shows that the majority of bacteria down-regulate flagellin production, however, a small fraction of the population continues to express flagellin at a very high level inside the plant. This heterogeneous expression of flagellin might be an adaptive strategy to the plant environment. In summary, our study provides new insights on Salmonella adaption to the plant environment through the regulation of flagellin expression.
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Affiliation(s)
- Azhar A. Zarkani
- Julius Kühn-Institut Federal Research Centre for Cultivated Plants (JKI), Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11/12, 38104 Braunschweig, Germany; (A.A.Z.); (M.G.)
- Department of Biotechnology, College of Science, University of Baghdad, 10071 Baghdad, Iraq
| | - Nieves López-Pagán
- Instituto de Hortofruticultura Subtropical y Mediterránea, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Dpto. Biología Celular, Genética y Fisiología, Campus de Teatinos, 29071 Malaga, Spain; (N.L.-P.); (J.R.-A.); (C.R.B.)
| | - Maja Grimm
- Julius Kühn-Institut Federal Research Centre for Cultivated Plants (JKI), Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11/12, 38104 Braunschweig, Germany; (A.A.Z.); (M.G.)
| | - María Antonia Sánchez-Romero
- Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Apartado 1095, 41080 Seville, Spain;
- Current address: Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Calle Profesor García González 2, 41012 Seville, Spain
| | - Javier Ruiz-Albert
- Instituto de Hortofruticultura Subtropical y Mediterránea, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Dpto. Biología Celular, Genética y Fisiología, Campus de Teatinos, 29071 Malaga, Spain; (N.L.-P.); (J.R.-A.); (C.R.B.)
| | - Carmen R. Beuzón
- Instituto de Hortofruticultura Subtropical y Mediterránea, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Dpto. Biología Celular, Genética y Fisiología, Campus de Teatinos, 29071 Malaga, Spain; (N.L.-P.); (J.R.-A.); (C.R.B.)
| | - Adam Schikora
- Julius Kühn-Institut Federal Research Centre for Cultivated Plants (JKI), Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11/12, 38104 Braunschweig, Germany; (A.A.Z.); (M.G.)
- Correspondence:
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Constantin ME, Vlieger BV, Takken FLW, Rep M. Diminished Pathogen and Enhanced Endophyte Colonization upon CoInoculation of Endophytic and Pathogenic Fusarium Strains. Microorganisms 2020; 8:E544. [PMID: 32283705 PMCID: PMC7232452 DOI: 10.3390/microorganisms8040544] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 12/23/2022] Open
Abstract
Root colonization by Fusarium oxysporum (Fo) endophytes reduces wilt disease symptoms caused by pathogenic Fo strains. The endophytic strain Fo47, isolated from wilt suppressive soils, reduces Fusarium wilt in various crop species such as tomato, flax, and asparagus. How endophyte-mediated resistance (EMR) against Fusarium wilt is achieved is unclear. Here, nonpathogenic colonization by Fo47 and pathogenic colonization by Fo f.sp. lycopersici (Fol) strains were assessed in tomato roots and stems when inoculated separately or coinoculated. It is shown that Fo47 reduces Fol colonization in stems of both noncultivated and cultivated tomato species. Conversely, Fo47 colonization of coinoculated tomato stems was increased compared to single inoculated plants. Quantitative PCR of fungal colonization of roots (co)inoculated with Fo47 and/or Fol showed that pathogen colonization was drastically reduced when coinoculated with Fo47, compared with single inoculated roots. Endophytic colonization of tomato roots remained unchanged upon coinoculation with Fol. In conclusion, EMR against Fusarium wilt is correlated with a reduction of root and stem colonization by the pathogen. In addition, the endophyte may take advantage of the pathogen-induced suppression of plant defences as it colonizes tomato stems more extensively.
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Affiliation(s)
| | | | | | - Martijn Rep
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH Amsterdam, The Netherlands; (M.E.C.); (F.L.W.T.)
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de Lamo FJ, Takken FLW. Biocontrol by Fusarium oxysporum Using Endophyte-Mediated Resistance. FRONTIERS IN PLANT SCIENCE 2020; 11:37. [PMID: 32117376 PMCID: PMC7015898 DOI: 10.3389/fpls.2020.00037] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/13/2020] [Indexed: 05/06/2023]
Abstract
Interactions between plants and the root-colonizing fungus Fusarium oxysporum (Fo) can be neutral, beneficial, or detrimental for the host. Fo is infamous for its ability to cause wilt, root-, and foot-rot in many plant species, including many agronomically important crops. However, Fo also has another face; as a root endophyte, it can reduce disease caused by vascular pathogens such as Verticillium dahliae and pathogenic Fo strains. Fo also confers protection to root pathogens like Pythium ultimum, but typically not to pathogens attacking above-ground tissues such as Botrytis cinerea or Phytophthora capsici. Endophytes confer biocontrol either directly by interacting with pathogens via mycoparasitism, antibiosis, or by competition for nutrients or root niches, or indirectly by inducing resistance mechanisms in the host. Fo endophytes such as Fo47 and CS-20 differ from Fo pathogens in their effector gene content, host colonization mechanism, location in the plant, and induced host-responses. Whereas endophytic strains trigger localized cell death in the root cortex, and transiently induce immune signaling and papilla formation, these responses are largely suppressed by pathogenic Fo strains. The ability of pathogenic strains to compromise immune signaling and cell death is likely attributable to their host-specific effector repertoire. The lower number of effector genes in endophytes as compared to pathogens provides a means to distinguish them from each other. Co-inoculation of a biocontrol-conferring Fo and a pathogenic Fo strain on tomato reduces disease, and although the pathogen still colonizes the xylem vessels this has surprisingly little effect on the xylem sap proteome composition. In this tripartite interaction the accumulation of just two PR proteins, NP24 (a PR-5) and a β-glucanase, was affected. The Fo-induced resistance response in tomato appears to be distinct from induced systemic resistance (ISR) or systemic acquired resistance (SAR), as the phytohormones jasmonate, ethylene, and salicylic acid are not required. In this review, we summarize our molecular understanding of Fo-induced resistance in a model and identify caveats in our knowledge.
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Affiliation(s)
| | - Frank L. W. Takken
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
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Carmona SL, Burbano-David D, Gómez MR, Lopez W, Ceballos N, Castaño-Zapata J, Simbaqueba J, Soto-Suárez M. Characterization of Pathogenic and Nonpathogenic Fusarium oxysporum Isolates Associated with Commercial Tomato Crops in the Andean Region of Colombia. Pathogens 2020; 9:E70. [PMID: 31968574 PMCID: PMC7168637 DOI: 10.3390/pathogens9010070] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/07/2020] [Accepted: 01/15/2020] [Indexed: 01/03/2023] Open
Abstract
In Colombia, tomato production under protected conditions represents an important economic contribution to the agricultural sector. Fusarium wilt diseases, caused by pathogenic formae speciales of the soil-borne fungus Fusarium oxysporum Schltdl., cause significant yield losses in tomatoes throughout the world. Investigation of the F. oxysporum-tomato pathosystem in Colombia is required to develop appropriate alternative disease management. In this study, 120 fungal isolates were obtained from four different departments in the Central Andean Region in Colombia from tomato crops with symptoms of wilt disease. A molecular characterization of the fungal isolates was performed using the SIX1, SIX3, and SIX4 effector genes of Fusarium oxysporum f. sp. lycopersici W.C. Snyder & H.N. Hansen (Fol). Additionally, we developed a new specific marker to distinguish between Fusarium oxysporum f. sp. radicis-lycopersici Jarvis & Shoemaker (Forl) and Fol isolates. Furthermore, a phylogenetic analysis using the Translation Elongation Factor 1-alpha (EF1a) gene was performed with the collected isolates. Two isolates (named Fol59 and Fol-UDC10) were identified as Fol race 2, four isolates were identified as Forl, six isolates were identified as F. solani, and most of the isolates were grouped within the F. oxysporum species complex. The phylogenetic tree of EF1a showed that most of the isolates could potentially correspond to nonpathogenic strains of F. oxysporum. Additional pathogenicity assays carried out with Fol59 and Fol-UDC10 confirmed that both isolates were highly virulent strains. This study represents a contribution to the understanding of the local interaction between tomatoes and F. oxysporum in Colombia.
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Affiliation(s)
- Sandra L. Carmona
- Corporación Colombiana de Investigación Agropecuaria. AGROSAVIA, Km 14 vía Mosquera-Bogotá, Mosquera 250047, Colombia; (S.L.C.); (D.B.-D.); (M.R.G.); (J.S.)
| | - Diana Burbano-David
- Corporación Colombiana de Investigación Agropecuaria. AGROSAVIA, Km 14 vía Mosquera-Bogotá, Mosquera 250047, Colombia; (S.L.C.); (D.B.-D.); (M.R.G.); (J.S.)
| | - Magda R. Gómez
- Corporación Colombiana de Investigación Agropecuaria. AGROSAVIA, Km 14 vía Mosquera-Bogotá, Mosquera 250047, Colombia; (S.L.C.); (D.B.-D.); (M.R.G.); (J.S.)
| | - Walter Lopez
- Departamento de Física y Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia sede Manizales, Manizales 170004, Colombia;
| | - Nelson Ceballos
- Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales 170004, Colombia; (N.C.); (J.C.-Z.)
| | - Jairo Castaño-Zapata
- Facultad de Ciencias Agropecuarias, Universidad de Caldas, Manizales 170004, Colombia; (N.C.); (J.C.-Z.)
| | - Jaime Simbaqueba
- Corporación Colombiana de Investigación Agropecuaria. AGROSAVIA, Km 14 vía Mosquera-Bogotá, Mosquera 250047, Colombia; (S.L.C.); (D.B.-D.); (M.R.G.); (J.S.)
| | - Mauricio Soto-Suárez
- Corporación Colombiana de Investigación Agropecuaria. AGROSAVIA, Km 14 vía Mosquera-Bogotá, Mosquera 250047, Colombia; (S.L.C.); (D.B.-D.); (M.R.G.); (J.S.)
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Fu HZ, Marian M, Enomoto T, Suga H, Shimizu M. Potential Use of L-arabinose for the Control of Tomato Bacterial Wilt. Microbes Environ 2020; 35:ME20106. [PMID: 33087626 PMCID: PMC7734405 DOI: 10.1264/jsme2.me20106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/07/2020] [Indexed: 11/17/2022] Open
Abstract
The present study aimed to investigate the potential of simple sugars for use as protection agents in the control of tomato bacterial wilt caused by Ralstonia pseudosolanacearum. Based on the sugar assimilation patterns of the pathogen, four unassimilable sugars (L-arabinose, maltose, D-raffinose, and D-ribose) were selected from 10 representative sugars present in tomato root exudates. These sugars were evaluated for their effects on bacterial wilt using a tomato seedling bioassay. The application of 0.25% L-arabinose significantly reduced disease severity and was, thus, selected as a candidate for further evaluations in a pot experiment under glasshouse conditions. The results obtained showed that the disease suppressive effects of L-arabinose slightly increased at higher concentrations; drench treatments at 0.1, 0.25, and 0.5% reduced disease severity by ca. 48, 70, and 87%, respectively. The drench treatment with 0.5% L-arabinose significantly reduced the pathogen population in the rhizosphere and stem tissues of tomato plants without any antibacterial activity. Real-time reverse-transcription PCR revealed that the expression of salicylic acid-dependent and ethylene-dependent defense genes was significantly enhanced in the stem tissues of L-arabinose-treated tomato plants following the pathogen inoculation. These results suggest that soil drenching with L-arabinose effectively suppresses tomato bacterial wilt by preventing pathogen proliferation in the rhizosphere and stem tissues of tomato plants. This is the first study to report the potential of L-arabinose as a safe, eco-friendly, and cost-effective plant protection agent for the control of tomato bacterial wilt.
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Affiliation(s)
- Hui-Zhen Fu
- The United Graduate School of Agricultural Science, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1193, Japan
| | - Malek Marian
- Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1193, Japan
- College of Agriculture, Ibaraki University, 3–21–1 Chuuo, Ami, Inashiki, Ibaraki 300–0393, Japan
| | - Takuo Enomoto
- Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1193, Japan
| | - Haruhisa Suga
- Life Science Research Center, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1193, Japan
| | - Masafumi Shimizu
- The United Graduate School of Agricultural Science, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1193, Japan
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Taylor A, Armitage AD, Handy C, Jackson AC, Hulin MT, Harrison RJ, Clarkson JP. Basal Rot of Narcissus: Understanding Pathogenicity in Fusarium oxysporum f. sp. narcissi. Front Microbiol 2019; 10:2905. [PMID: 31921077 PMCID: PMC6930931 DOI: 10.3389/fmicb.2019.02905] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 12/02/2019] [Indexed: 12/21/2022] Open
Abstract
Fusarium oxysporum is a globally distributed soilborne fungal pathogen causing root rots, bulb rots, crown rots and vascular wilts on a range of horticultural plants. Pathogenic F. oxysporum isolates are highly host specific and are classified as formae speciales. Narcissus is an important ornamental crop and both the quality and yield of flowers and bulbs can be severely affected by a basal rot caused by F. oxysporum f. sp. narcissi (FON); 154 Fusarium isolates were obtained from different locations and Narcissus cultivars in the United Kingdom, representing a valuable resource. A subset of 30 F. oxysporum isolates were all found to be pathogenic and were therefore identified as FON. Molecular characterisation of isolates through sequencing of three housekeeping genes, suggested a monophyletic origin with little divergence. PCR detection of 14 Secreted in Xylem (SIX) genes, previously shown to be associated with pathogenicity in other F. oxysporum f. spp., revealed different complements of SIX7, SIX9, SIX10, SIX12 and SIX13 within FON isolates which may suggest a race structure. SIX gene sequences were unique to FON and SIX10 was present in all isolates, allowing for molecular identification of FON for the first time. The genome of a highly pathogenic isolate was sequenced and lineage specific (LS) regions identified which harboured putative effectors including the SIX genes. Real-time RT-PCR, showed that SIX genes and selected putative effectors were expressed in planta with many significantly upregulated during infection. This is the first study to characterise molecular variation in FON and provide an analysis of the FON genome. Identification of expressed genes potentially associated with virulence provides the basis for future functional studies and new targets for molecular diagnostics.
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Affiliation(s)
- Andrew Taylor
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Warwick, United Kingdom
| | | | - Claire Handy
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Warwick, United Kingdom
| | - Alison C Jackson
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Warwick, United Kingdom
| | | | | | - John P Clarkson
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Warwick, United Kingdom
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Potential Interactions between Invasive Fusarium circinatum and Other Pine Pathogens in Europe. FORESTS 2019. [DOI: 10.3390/f11010007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pines are major components of native forests and plantations in Europe, where they have both economic significance and an important ecological role. Diseases of pines are mainly caused by fungal and oomycete pathogens, and can significantly reduce the survival, vigor, and yield of both individual trees and entire stands or plantations. Pine pitch canker (PPC), caused by Fusarium circinatum (Nirenberg and O’Donnell), is among the most devastating pine diseases in the world, and is an example of an emergent invasive disease in Europe. The effects of microbial interactions on plant health, as well as the possible roles plant microbiomes may have in disease expression, have been the focus of several recent studies. Here, we describe the possible effects of co-infection with pathogenic fungi and oomycetes with F. circinatum on the health of pine seedlings and mature plants, in an attempt to expand our understanding of the role that biotic interactions may play in the future of PPC disease in European nurseries and forests. The available information on pine pathogens that are able to co-occur with F. circinatum in Europe is here reviewed and interpreted to theoretically predict the effects of such co-occurrences on pine survival, growth, and yield. Beside the awareness that F. circinatum may co-occurr on pines with other pathogens, an additional outcome from this review is an updating of the literature, including the so-called grey literature, to document the geographical distribution of the relevant pathogens and to facilitate differential diagnoses, particularly in nurseries, where some of them may cause symptoms similar to those induced by F. circinatum. An early and accurate diagnosis of F. circinatum, a pathogen that has been recently introduced and that is currently regulated in Europe, is essential to prevent its introduction and spread in plantings and forests.
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Kamou NN, Cazorla F, Kandylas G, Lagopodi AL. Induction of defense-related genes in tomato plants after treatments with the biocontrol agents Pseudomonas chlororaphis ToZa7 and Clonostachys rosea IK726. Arch Microbiol 2019; 202:257-267. [DOI: 10.1007/s00203-019-01739-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 09/04/2019] [Accepted: 09/27/2019] [Indexed: 01/08/2023]
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Xie XG, Huang CY, Cai ZD, Chen Y, Dai CC. Targeted Acquisition of Fusarium oxysporum f. sp. niveum Toxin-Deficient Mutant and Its Effects on Watermelon Fusarium Wilt. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:8536-8547. [PMID: 31310520 DOI: 10.1021/acs.jafc.9b02172] [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] [Indexed: 06/10/2023]
Abstract
Watermelon Fusarium wilt is a common soil-borne disease that has significantly affected its yield. In this study, fusaric acid-deficient mutant designated as ΔFUBT (mutated from Fusarium oxysporum f. sp. niveum, FON) was obtained. The ΔFUBT mutant showed significant decrease in fusaric acid production but maintained wild-type characteristics, such as in vitro colony morphology, size, and conidiation. A field pot experiment demonstrated that ΔFUBT could successfully colonize the rhizosphere and the roots of watermelon, leading to significant reduction in FON colonization in the watermelon plant. In addition, ΔFUBT inoculation significantly improved the rhizosphere microenvironment and effectively increased the resistance in watermelon. This study demonstrated that a nonpathogenic Fusarium mutant (ΔFUBT) could be developed as an effective microbial control agent to alleviate Fusarium wilt disease in watermelon and increase its yield.
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Affiliation(s)
- Xing-Guang Xie
- 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
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences , Chinese Academy of Sciences , Shanghai 200032 , China
| | - Chun-Yan Huang
- 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
| | - Zhen-Dong Cai
- 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
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang Province , Ningbo University , Ningbo , Zhejiang Province 315211 , China
| | - Yan Chen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science , Chinese Academy of Sciences , Nanjing , Jiangsu Province 210008 , China
| | - Chuan-Chao Dai
- 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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Constantin ME, de Lamo FJ, Vlieger BV, Rep M, Takken FLW. Endophyte-Mediated Resistance in Tomato to Fusarium oxysporum Is Independent of ET, JA, and SA. FRONTIERS IN PLANT SCIENCE 2019; 10:979. [PMID: 31417594 PMCID: PMC6685397 DOI: 10.3389/fpls.2019.00979] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 07/11/2019] [Indexed: 05/21/2023]
Abstract
Root endophytes can confer resistance against plant pathogens by direct antagonism or via the host by triggering induced resistance. The latter response typically relies on jasmonic acid (JA)/ethylene (ET)-depended signaling pathways, but can also be triggered via salicylic acid (SA)-dependent signaling pathways. Here, we set out to determine if endophyte-mediated resistance (EMR), conferred by the Fusarium endophyte Fo47, against Fusarium wilt disease in tomato is mediated via SA, ET or JA. To test the contribution of SA, ET, and JA in EMR we performed bioassays with Fo47 and Fusarium oxysporum f. sp. lycopersici in tomato plants impaired in SA accumulation (NahG), JA biosynthesis (def1) or ET-production (ACD) and -sensing (Nr). We observed that the colonization pattern of Fo47 in stems of wildtype plants was indistinguishable from that of the hormone mutants. Surprisingly, EMR was not compromised in the lines affected in JA, ET, or SA signaling. The independence of EMR on SA, JA, and ET implies that this induced resistance-response against Fusarium wilt disease is distinct from the classical Induced Systemic Resistance (ISR) response, providing exciting possibilities for control of wilt diseases independent of conventional defense pathways.
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Association between dipsacus saponin VI level and diversity of endophytic fungi in roots of Dipsacus asperoides. World J Microbiol Biotechnol 2019; 35:42. [PMID: 30778697 PMCID: PMC6394449 DOI: 10.1007/s11274-019-2616-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 02/06/2019] [Indexed: 10/31/2022]
Abstract
Dipsacus asperoides contains multiple pharmacologically active compounds. The principal are saponins. The plant can be cultivated, but it contains lower levels of bioactive compounds than the plant in the wild. It may be the reason to exploit the endophytic fungi that colonize the plant roots in order to produce bioactive compounds. However, the endophytic fungi of D. asperoides have not been analyzed in detail. In this study, we isolated and identified 46 endophytic fungal strains from the taproots, lateral roots and leaves, and we used morphological and molecular biological methods to assign them into 15 genera: Fusarium sp., Ceratobasidium sp., Chaetomium sp., Penicillium sp., Aspergillus sp., Talaromyces sp., Cladosporium sp., Bionectria sp., Mucor sp., Trichoderma sp., Myrothecium sp., Clonostachys sp., Ijuhya sp., Leptosphaeria sp. and Phoma sp. Taproots contained abundant endophytic fungi, the numbers of which correlated positively with level of dipsacus saponin VI. Primary fermentation of several endophytic fungal strains from taproots showed that Fusarium, Leptosphaeria, Ceratobasidium sp. and Phoma sp. can produce the triterpenoid saponin. These results may guide efforts to sustainably produce bioactive compounds from D. asperoides.
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Muñoz IV, Sarrocco S, Malfatti L, Baroncelli R, Vannacci G. CRISPR-Cas for Fungal Genome Editing: A New Tool for the Management of Plant Diseases. FRONTIERS IN PLANT SCIENCE 2019; 10:135. [PMID: 30828340 PMCID: PMC6384228 DOI: 10.3389/fpls.2019.00135] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 01/28/2019] [Indexed: 05/02/2023]
Affiliation(s)
- Isabel Vicente Muñoz
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Sabrina Sarrocco
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
- *Correspondence: Sabrina Sarrocco
| | - Luca Malfatti
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Riccardo Baroncelli
- Spanish-Portuguese Center for Agricultural Research (CIALE), Department of Microbiology and Genetics, University of Salamanca, Villamayor, Spain
| | - Giovanni Vannacci
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
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de Lamo FJ, Constantin ME, Fresno DH, Boeren S, Rep M, Takken FLW. Xylem Sap Proteomics Reveals Distinct Differences Between R Gene- and Endophyte-Mediated Resistance Against Fusarium Wilt Disease in Tomato. Front Microbiol 2018; 9:2977. [PMID: 30564219 PMCID: PMC6288350 DOI: 10.3389/fmicb.2018.02977] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/19/2018] [Indexed: 11/13/2022] Open
Abstract
Resistance (R) genes and endophytic organisms can both protect plants against pathogens. Although the outcome of both processes is the same, little is known about the commonalities and differences between both immune responses. Here we set out to phenotypically characterize both responses in the tomato-Fusarium pathosystem, and to identify markers to distinguish these responses at the molecular level. As endophyte Fusarium oxysporum (Fo) strain Fo47 was employed, which confers protection against various pathogens, including the vascular wilt fungus F. oxysporum f.sp. lycopersici (Fol). As R-gene conferring Fol resistance, the I-2 gene of tomato (Solanum lycopersicum) was used. Fol colonizes the xylem vessels of susceptible and I-2 resistant tomato plants, but only causes disease in the former. Fol was found to colonize the vasculature of endophyte-colonized plants, and could be isolated from stems of non-diseased plants co-inoculated with Fo47 and Fol. Because the xylem vessels form the main interface between plant and pathogen, the xylem sap proteomes during R gene- and Endophyte-Mediated Resistance (RMR and EMR) were compared using label-free quantitative nLC-MS/MS. Surprisingly, both proteomes were remarkably similar to the mock, revealing only one or two differentially accumulated proteins in the respective resistant interactions. Whereas in I-2 plants the accumulation of the pathogenesis-related protein PR-5x was strongly induced by Fol, the endophyte triggered induction of both NP24, another PR-5 isoform, and of a β-glucanase in the presence of Fol. Notably, over 54% of the identified xylem sap proteins have a predicted intracellular localization, which implies that these might be present in exosomes. In conclusion, whereas both resistance mechanisms permit the pathogen to colonize the vasculature, this does not result in disease and this resistance coincides with specific induction of two distinct PR-5 isoforms and a β-glucanase.
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Affiliation(s)
- Francisco J. de Lamo
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Maria E. Constantin
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - David H. Fresno
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Sjef Boeren
- Laboratory of Biochemistry, Wageningen University, Wageningen, Netherlands
| | - Martijn Rep
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Frank L. W. Takken
- Molecular Plant Pathology, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
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49
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Armitage AD, Taylor A, Sobczyk MK, Baxter L, Greenfield BPJ, Bates HJ, Wilson F, Jackson AC, Ott S, Harrison RJ, Clarkson JP. Characterisation of pathogen-specific regions and novel effector candidates in Fusarium oxysporum f. sp. cepae. Sci Rep 2018; 8:13530. [PMID: 30202022 PMCID: PMC6131394 DOI: 10.1038/s41598-018-30335-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 07/20/2018] [Indexed: 12/21/2022] Open
Abstract
A reference-quality assembly of Fusarium oxysporum f. sp. cepae (Foc), the causative agent of onion basal rot has been generated along with genomes of additional pathogenic and non-pathogenic isolates of onion. Phylogenetic analysis confirmed a single origin of the Foc pathogenic lineage. Genome alignments with other F. oxysporum ff. spp. and non pathogens revealed high levels of syntenic conservation of core chromosomes but little synteny between lineage specific (LS) chromosomes. Four LS contigs in Foc totaling 3.9 Mb were designated as pathogen-specific (PS). A two-fold increase in segmental duplication events was observed between LS regions of the genome compared to within core regions or from LS regions to the core. RNA-seq expression studies identified candidate effectors expressed in planta, consisting of both known effector homologs and novel candidates. FTF1 and a subset of other transcription factors implicated in regulation of effector expression were found to be expressed in planta.
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Affiliation(s)
| | - Andrew Taylor
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Wellesbourne, Warwick, CV35 9EF, UK
| | | | - Laura Baxter
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Wellesbourne, Warwick, CV35 9EF, UK
| | | | - Helen J Bates
- NIAB-EMR, New Road, East Malling, Kent, ME19 6BJ, UK
| | - Fiona Wilson
- NIAB-EMR, New Road, East Malling, Kent, ME19 6BJ, UK
| | - Alison C Jackson
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Wellesbourne, Warwick, CV35 9EF, UK
| | - Sascha Ott
- Department of Computer Science, University of Warwick, CV4 7AL, Warwick, UK
| | | | - John P Clarkson
- Warwick Crop Centre, School of Life Sciences, University of Warwick, Wellesbourne, Warwick, CV35 9EF, UK
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50
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Shcherbakova LA, Nazarova TA, Mikityuk OD, Istomina EA, Odintsova TI. An Extract Purified from the Mycelium of a Tomato Wilt-Controlling Strain of Fusarium sambucinum Can Protect Wheat against Fusarium and Common Root Rots. Pathogens 2018; 7:E61. [PMID: 30011945 PMCID: PMC6160971 DOI: 10.3390/pathogens7030061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 12/18/2022] Open
Abstract
An approach to manage seed-transmitted Fusarium crown-foot-root rot (FCR, Fusarium spp.) and common root rot (CRR, Bipolaris sorokiniana) on wheat, avoiding environmental risks of chemicals, is seed treatments with microbial metabolites. F. sambucinum strain FS-94 that induces resistance to tomato wilt was shown by this study to be a source of non-fungitoxic wheat-protecting metabolites, which were contained in a mycelium extract purified by gel-chromatography and ultrafiltration. Plant-protecting effect of the purified mycelial extract (PME) was demonstrated in vegetation experiments using a rolled-towel assay and by small-plot field trials. To elucidate mechanisms putatively underlying PME protective activity, tests with cultured Triticum aestivum and T. kiharae cells, particularly the extracellular alkalinization assay, as well as gene expression analysis in germinated wheat seeds were used. Pre-inoculation treatments of seeds with PME significantly decreased the incidence (from 30 to 40%) and severity (from 37 to 50%) of root rots on seedlings without any inhibition of the seed germination and potentiation of deoxynivalenol (DON), DON monoacetylated derivatives and zearalenon production in FCR agents. In vegetation experiments, reductions in the DON production were observed with doses of 0.5 and 1 mg/mL of PME. Pre-sowing PME application on seeds of two spring wheat cultivars naturally infected with FCR and CRR provided the mitigation of both diseases under field conditions during four growing seasons (2013⁻2016). PME-induced ion exchange response in cultured wheat cells, their increased survivability, and up-regulated expression of some defensins' genes in PME-exposed seedlings allow the suggestion of the plant-mediated character of disease-controlling effect observed in field.
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Affiliation(s)
- Larisa A Shcherbakova
- Laboratory of Physiological Plant Pathology, All-Russian Research Institute of Phytopathology, B. Vyazyomy, Moscow Reg.143050, Russia.
| | - Tatyana A Nazarova
- Laboratory of Physiological Plant Pathology, All-Russian Research Institute of Phytopathology, B. Vyazyomy, Moscow Reg.143050, Russia.
| | - Oleg D Mikityuk
- Laboratory of Physiological Plant Pathology, All-Russian Research Institute of Phytopathology, B. Vyazyomy, Moscow Reg.143050, Russia.
| | - Ekaterina A Istomina
- Laboratory of Molecular-Genetic Bases of Plant Immunity, Vavilov Institute of General Genetics, Gubkina str. 3, 119333 Moscow, Russia.
| | - Tatyana I Odintsova
- Laboratory of Molecular-Genetic Bases of Plant Immunity, Vavilov Institute of General Genetics, Gubkina str. 3, 119333 Moscow, Russia.
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