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Nielsen MR, Sørensen T, Pedersen TB, Westphal KR, Díaz Fernández De Quincoces L, Sondergaard TE, Wimmer R, Brown DW, Sørensen JL. Final piece to the Fusarium pigmentation puzzle - Unraveling of the phenalenone biosynthetic pathway responsible for perithecial pigmentation in the Fusarium solani species complex. Fungal Genet Biol 2024; 174:103912. [PMID: 39004163 DOI: 10.1016/j.fgb.2024.103912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 06/29/2024] [Accepted: 07/04/2024] [Indexed: 07/16/2024]
Abstract
The Fusarium solani species complex (FSSC) is comprised of important pathogens of plants and humans. A distinctive feature of FSSC species is perithecial pigmentation. While the dark perithecial pigments of other Fusarium species are derived from fusarubins synthesized by polyketide synthase 3 (PKS3), the perithecial pigments of FSSC are derived from an unknown metabolite synthesized by PKS35. Here, we confirm in FSSC species Fusarium vanettenii that PKS35 (fsnI) is required for perithecial pigment synthesis by deletion analysis and that fsnI is closely related to phnA from Penicillium herquei, as well as duxI from Talaromyces stipentatus, which produce prephenalenone as an early intermediate in herqueinone and duclauxin synthesis respectively. The production of prephenalenone by expression of fsnI in Saccharomyces cerevisiae indicates that it is also an early intermediate in perithecial pigment synthesis. We next identified a conserved cluster of 10 genes flanking fsnI in F. vanettenii that when expressed in F. graminearum led to the production of a novel corymbiferan lactone F as a likely end product of the phenalenone biosynthetic pathway in FSSC.
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Affiliation(s)
- Mikkel Rank Nielsen
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8A, 6700 Esbjerg, Denmark
| | - Trine Sørensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Tobias Bruun Pedersen
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8A, 6700 Esbjerg, Denmark
| | - Klaus Ringsborg Westphal
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | | | - Teis Esben Sondergaard
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Reinhard Wimmer
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Daren W Brown
- National Center for Agricultural Utilization Research, U.S. Department of Agriculture, 1815 N University St. Peoria IL 61604, United States of America
| | - Jens Laurids Sørensen
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8A, 6700 Esbjerg, Denmark.
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Calleros-González P, Ibarra-Juarez A, Lamelas A, Suárez-Moo P. How host species and body part determine the microbial communities of five ambrosia beetle species. Int Microbiol 2024:10.1007/s10123-024-00502-0. [PMID: 38489098 DOI: 10.1007/s10123-024-00502-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/23/2024] [Accepted: 03/07/2024] [Indexed: 03/17/2024]
Abstract
The ambrosia beetles are farming insects that feed mainly on their cultivated fungi, which in some occasions are pathogens from forest and fruit trees. We used a culture-independent approach based on 16S and 18S rRNA gene metabarcoding analysis to investigate the diversity and composition of the bacterial and fungal communities associated with five ambrosia beetle species: four species native to America (Monarthrum dimidiatum, Dryocoetoides capucinus, Euwallacea discretus, Corthylus consimilis) and an introduced species (Xylosandrus morigerus). For the bacterial community, the beetle species hosted a broad diversity with 1,579 amplicon sequence variants (ASVs) and 66 genera, while for the fungal community they hosted 288 ASVs and 39 genera. Some microbial groups dominated the community within a host species or a body part (Wolbachia in the head-thorax of E. discretus; Ambrosiella in the head-thorax and abdomen of X. morigerus). The taxonomic composition and structure of the microbial communities appeared to differ between beetle species; this was supported by beta-diversity analysis, which indicated that bacterial and fungal communities were clustered mainly by host species. This study characterizes for the first time the microbial communities associated with unexplored ambrosia beetle species, as well as the factors that affect the composition and taxonomic diversity per se, contributing to the knowledge of the ambrosia beetle system.
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Affiliation(s)
| | - Arturo Ibarra-Juarez
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A. C., Xalapa, C.P. 91070, México
- Investigador Por México - CONAHCyT. Instituto de Ecología, A. C., Carretera Antigua a Coatepec 351, Xalapa, C.P. 91070, México
| | - Araceli Lamelas
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A. C., Xalapa, C.P. 91070, México.
| | - Pablo Suárez-Moo
- Facultad de Química, Unidad de Química-Sisal, Universidad Nacional Autónoma de México, Sisal, Yucatán, 97356, México.
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Antifungal Effect of Copper Nanoparticles against Fusarium kuroshium, an Obligate Symbiont of Euwallacea kuroshio Ambrosia Beetle. J Fungi (Basel) 2022; 8:jof8040347. [PMID: 35448578 PMCID: PMC9032953 DOI: 10.3390/jof8040347] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/15/2022] [Accepted: 03/18/2022] [Indexed: 02/05/2023] Open
Abstract
Copper nanoparticles (Cu-NPs) have shown great antifungal activity against phytopathogenic fungi, making them a promising and affordable alternative to conventional fungicides. In this study, we evaluated the antifungal activity of Cu-NPs against Fusarium kuroshium, the causal agent of Fusarium dieback, and this might be the first study to do so. The Cu-NPs (at different concentrations) inhibited more than 80% of F. kuroshium growth and were even more efficient than a commercial fungicide used as a positive control (cupric hydroxide). Electron microscopy studies revealed dramatic damage caused by Cu-NPs, mainly in the hyphae surface and in the characteristic form of macroconidia. This damage was visible only 3 days post inoculation with used treatments. At a molecular level, the RNA-seq study suggested that this growth inhibition and colony morphology changes are a result of a reduced ergosterol biosynthesis caused by free cytosolic copper ions. Furthermore, transcriptional responses also revealed that the low- and high-affinity copper transporter modulation and the endosomal sorting complex required for transport (ESCRT) are only a few of the distinct detoxification mechanisms that, in its conjunction, F. kuroshium uses to counteract the toxicity caused by the reduced copper ion.
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Pérez-Torres CA, Ibarra-Laclette E, Hernández-Domínguez EE, Rodríguez-Haas B, Pérez-Lira AJ, Villafán E, Alonso-Sánchez A, García-Ávila CDJ, Ramírez-Pool JA, Sánchez-Rangel D. Molecular evidence of the avocado defense response to Fusarium kuroshium infection: a deep transcriptome analysis using RNA-Seq. PeerJ 2021; 9:e11215. [PMID: 33954045 PMCID: PMC8052963 DOI: 10.7717/peerj.11215] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 03/15/2021] [Indexed: 01/13/2023] Open
Abstract
Fusarium kuroshium is a novel member of the Ambrosia Fusarium Clade (AFC) that has been recognized as one of the symbionts of the invasive Kuroshio shot hole borer, an Asian ambrosia beetle. This complex is considered the causal agent of Fusarium dieback, a disease that has severely threatened natural forests, landscape trees, and avocado orchards in the last 8 years. Despite the interest in this species, the molecular responses of both the host and F. kuroshium during the infection process and disease establishment remain unknown. In this work, we established an in vitro pathosystem using Hass avocado stems inoculated with F. kuroshium to investigate differential gene expression at 1, 4, 7 and 14 days post-inoculation. RNA-seq technology allowed us to obtain data from both the plant and the fungus, and the sequences obtained from both organisms were analyzed independently. The pathosystem established was able to mimic Fusarium dieback symptoms, such as carbohydrate exudation, necrosis, and vascular tissue discoloration. The results provide interesting evidence regarding the genes that may play roles in the avocado defense response to Fusarium dieback disease. The avocado data set comprised a coding sequence collection of 51,379 UniGenes, from which 2,403 (4.67%) were identified as differentially expressed. The global expression analysis showed that F. kuroshium responsive UniGenes can be clustered into six groups according to their expression profiles. The biologically relevant functional categories that were identified included photosynthesis as well as responses to stress, hormones, abscisic acid, and water deprivation. Additionally, processes such as oxidation-reduction, organization and biogenesis of the cell wall and polysaccharide metabolism were detected. Moreover, we identified orthologues of nucleotide-binding leucine-rich receptors, and their possible action mode was analyzed. In F. kuroshium, we identified 57 differentially expressed genes. Interestingly, the alcohol metabolic process biological category had the highest number of upregulated genes, and the enzyme group in this category may play an important role in the mechanisms of secondary metabolite detoxification. Hydrolytic enzymes, such as endoglucanases and a pectate lyase, were also identified, as well as some proteases. In conclusion, our research was conducted mainly to explain how the vascular tissue of a recognized host of the ambrosia complex responds during F. kuroshium infection since Fusarium dieback is an ambrosia beetle-vectored disease and many variables facilitate its establishment.
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Affiliation(s)
- Claudia-Anahí Pérez-Torres
- Catedrático CONACyT en la Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C., Xalapa, Veracruz, México
| | | | | | | | - Alan-Josué Pérez-Lira
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C., Xalapa, Veracruz, México
| | - Emanuel Villafán
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C., Xalapa, Veracruz, México
| | | | - Clemente de Jesús García-Ávila
- Centro Nacional de Referencia Fitosanitaria, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria, Tecámac, Estado de México, México
| | - José-Abrahán Ramírez-Pool
- Centro Nacional de Referencia Fitosanitaria, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria, Tecámac, Estado de México, México.,Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, México
| | - Diana Sánchez-Rangel
- Catedrático CONACyT en la Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C., Xalapa, Veracruz, México
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Characterization of the Exo-Metabolome of the Emergent Phytopathogen Fusarium kuroshium sp. nov., a Causal Agent of Fusarium Dieback. Toxins (Basel) 2021; 13:toxins13040268. [PMID: 33918546 PMCID: PMC8069249 DOI: 10.3390/toxins13040268] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/20/2021] [Accepted: 03/21/2021] [Indexed: 11/17/2022] Open
Abstract
Fusarium kuroshium is the fungal symbiont associated with the ambrosia beetle Euwallacea kuroshio, a plague complex that attacks avocado, among other hosts, causing a disease named Fusarium dieback (FD). However, the contribution of F. kuroshium to the establishment of this disease remains unknown. To advance the understanding of F. kuroshium pathogenicity, we profiled its exo-metabolome through metabolomics tools based on accurate mass spectrometry. We found that F. kuroshium can produce several key metabolites with phytotoxicity properties and other compounds with unknown functions. Among the metabolites identified in the fungal exo-metabolome, fusaric acid (FA) was further studied due to its phytotoxicity and relevance as a virulence factor. We tested both FA and organic extracts from F. kuroshium at various dilutions in avocado foliar tissue and found that they caused necrosis and chlorosis, resembling symptoms similar to those observed in FD. This study reports for first-time insights regarding F. kuroshium associated with its virulence, which could lead to the potential development of diagnostic and management tools of FD disease and provides a basis for understanding the interaction of F. kuroshium with its host plants.
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Vázquez-Rosas-Landa M, Sánchez-Rangel D, Hernández-Domínguez EE, Pérez-Torres CA, López-Buenfil A, de Jesús García-Ávila C, Carrillo-Hernández ED, Castañeda-Casasola CC, Rodríguez-Haas B, Pérez-Lira J, Villafán E, Alonso-Sánchez A, Ibarra-Laclette E. Design of a diagnostic system based on molecular markers derived from the ascomycetes pan-genome analysis: The case of Fusarium dieback disease. PLoS One 2021; 16:e0246079. [PMID: 33507916 PMCID: PMC7843019 DOI: 10.1371/journal.pone.0246079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
A key factor to take actions against phytosanitary problems is the accurate and rapid detection of the causal agent. Here, we develop a molecular diagnostics system based on comparative genomics to easily identify fusariosis and specific pathogenic species as the Fusarium kuroshium, the symbiont of the ambrosia beetle Euwallaceae kuroshio Gomez and Hulcr which is responsible for Fusarium dieback disease in San Diego CA, USA. We performed a pan-genome analysis using sixty-three ascomycetes fungi species including phytopathogens and fungi associated with the ambrosia beetles. Pan-genome analysis revealed that 2,631 orthologue genes are only shared by Fusarium spp., and on average 3,941 (SD ± 1,418.6) are species-specific genes. These genes were used for PCR primer design and tested on DNA isolated from i) different strains of ascomycete species, ii) artificially infected avocado stems and iii) plant tissue of field-collected samples presumably infected. Our results let us propose a useful set of primers to either identify any species from Fusarium genus or, in a specific manner, species such as F. kuroshium, F. oxysporum, and F. graminearum. The results suggest that the molecular strategy employed in this study can be expanded to design primers against different types of pathogens responsible for provoking critical plant diseases.
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Affiliation(s)
- Mirna Vázquez-Rosas-Landa
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
| | - Diana Sánchez-Rangel
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
- Catedrático CONACYT en el INECOL, Xalapa, Veracruz, México
| | - Eric E. Hernández-Domínguez
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
- Catedrático CONACYT en el INECOL, Xalapa, Veracruz, México
| | - Claudia-Anahí Pérez-Torres
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
- Catedrático CONACYT en el INECOL, Xalapa, Veracruz, México
| | | | - Clemente de Jesús García-Ávila
- Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA), Centro Nacional de Referencia Fitosanitaria (CNRF), Tecámac, Estado de México, México
| | | | - Cynthia-Coccet Castañeda-Casasola
- Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA), Centro Nacional de Referencia Fitosanitaria (CNRF), Tecámac, Estado de México, México
| | - Benjamín Rodríguez-Haas
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
| | - Josué Pérez-Lira
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
| | - Emanuel Villafán
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
| | - Alexandro Alonso-Sánchez
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
| | - Enrique Ibarra-Laclette
- Red de Estudios Moleculares Avanzados (REMAv), Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
- * E-mail:
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7
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Sandoval-Denis M, Lombard L, Crous P. Back to the roots: a reappraisal of Neocosmospora. PERSOONIA 2019; 43:90-185. [PMID: 32214499 PMCID: PMC7085857 DOI: 10.3767/persoonia.2019.43.04] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 07/16/2019] [Indexed: 11/25/2022]
Abstract
The genus Neocosmospora (Fusarium solani species complex) contains saprobes, plant endophytes and pathogens of major economic significance as well as opportunistic animal pathogens. Advances in biological and phylogenetic species recognition revealed a rich species diversity which has largely remained understudied. Most of the currently recognised species lack formal descriptions and Latin names, while the taxonomic utility of old names is hampered by the lack of nomenclatural type specimens. Therefore, to stabilise the taxonomy and nomenclature of these important taxa, we examined type specimens and representative cultures of several old names by means of morphology and phylogenetic analyses based on rDNA (ITS and LSU), rpb2 and tef1 sequences. Sixty-eight species are accepted in Neocosmospora, 29 of them described herein as new; while 13 new combinations are made. Eleven additional phylogenetic species are recognized, but remain as yet undescribed. Lectotypes are proposed for eight species, seven species are epitypified and two species are neotypified. Notes on an additional 17 doubtful or excluded taxa are provided.
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Affiliation(s)
- M. Sandoval-Denis
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
- Faculty of Natural and Agricultural Sciences, Department of Plant Sciences, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
| | - L. Lombard
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
| | - P.W. Crous
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
- Faculty of Natural and Agricultural Sciences, Department of Plant Sciences, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
- Wageningen University and Research Centre (WUR), Laboratory of Phytopathology, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
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Blaz J, Barrera-Redondo J, Vázquez-Rosas-Landa M, Canedo-Téxon A, Aguirre von Wobeser E, Carrillo D, Stouthamer R, Eskalen A, Villafán E, Alonso-Sánchez A, Lamelas A, Ibarra-Juarez LA, Pérez-Torres CA, Ibarra-Laclette E. Genomic Signals of Adaptation towards Mutualism and Sociality in Two Ambrosia Beetle Complexes. Life (Basel) 2018; 9:E2. [PMID: 30583535 PMCID: PMC6463014 DOI: 10.3390/life9010002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 12/08/2018] [Accepted: 12/20/2018] [Indexed: 01/03/2023] Open
Abstract
Mutualistic symbiosis and eusociality have developed through gradual evolutionary processes at different times in specific lineages. Like some species of termites and ants, ambrosia beetles have independently evolved a mutualistic nutritional symbiosis with fungi, which has been associated with the evolution of complex social behaviors in some members of this group. We sequenced the transcriptomes of two ambrosia complexes (Euwallacea sp. near fornicatus⁻Fusarium euwallaceae and Xyleborus glabratus⁻Raffaelea lauricola) to find evolutionary signatures associated with mutualism and behavior evolution. We identified signatures of positive selection in genes related to nutrient homeostasis; regulation of gene expression; development and function of the nervous system, which may be involved in diet specialization; behavioral changes; and social evolution in this lineage. Finally, we found convergent changes in evolutionary rates of proteins across lineages with phylogenetically independent origins of sociality and mutualism, suggesting a constrained evolution of conserved genes in social species, and an evolutionary rate acceleration related to changes in selective pressures in mutualistic lineages.
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Affiliation(s)
- Jazmín Blaz
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
| | - Josué Barrera-Redondo
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México 04500, Mexico.
| | | | - Anahí Canedo-Téxon
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
| | | | - Daniel Carrillo
- Tropical Research and Education Center, University of Florida, Homestead, FL 33031, USA.
| | - Richard Stouthamer
- Department of Plant Pathology, University of California⁻Riverside, Riverside, CA 92521, USA.
| | - Akif Eskalen
- Department of Plant Pathology, University of California, Davis, CA 95616-8751, USA.
| | - Emanuel Villafán
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
| | - Alexandro Alonso-Sánchez
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
| | - Araceli Lamelas
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
| | - Luis Arturo Ibarra-Juarez
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
- Cátedras CONACyT/Instituto de Ecología A.C., Xalapa, Veracruz 91070, Mexico.
| | - Claudia Anahí Pérez-Torres
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
- Cátedras CONACyT/Instituto de Ecología A.C., Xalapa, Veracruz 91070, Mexico.
| | - Enrique Ibarra-Laclette
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, Xalapa, Veracruz 91070, Mexico.
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9
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Sánchez-Rangel D, Hernández-Domínguez EE, Pérez-Torres CA, Ortiz-Castro R, Villafán E, Rodríguez-Haas B, Alonso-Sánchez A, López-Buenfil A, Carrillo-Ortiz N, Hernández-Ramos L, Ibarra-Laclette E. Environmental pH modulates transcriptomic responses in the fungus Fusarium sp. associated with KSHB Euwallacea sp. near fornicatus. BMC Genomics 2018; 19:721. [PMID: 30285612 PMCID: PMC6167834 DOI: 10.1186/s12864-018-5083-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/17/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The Ambrosia Fusarium Clade phytopathogenic Fusarium fungi species have a symbiotic relationship with ambrosia beetles in the genus Euwallacea (Coleoptera: Curculionidae). Related beetle species referred to as Euwallacea sp. near fornicatus have been spread in California, USA and are recognized as the causal agents of Fusarium dieback, a disease that causes mortality of many plant species. Despite the importance of this fungi, no transcriptomic resources have been generated. The datasets described here represent the first ever transcripts available for these species. We focused our study on the isolated species of Fusarium that is associated with one of the cryptic species referred to as Kuroshio Shot Hole Borer (KSHB) Euwallacea sp. near fornicatus. RESULTS Hydrogen concentration is a critical signal in fungi for growth and host colonization, the aim of this study was to evaluate the effect of different pH conditions on growth and gene expression of the fungus Fusarium sp. associated with KSHB. An RNA-seq approach was used to compare the gene expression of the fungus grown for 2 weeks in liquid medium at three different pH levels (5.0, 6.0, and 7.0). An unbuffered treatment was included to evaluate the capability of the fungus to change the pH of its environment and the impact in gene expression. The results showed that the fungus can grow and modulate its genetic expression at different pH conditions; however, growth was stunted in acidic pH in comparison with neutral pH. The results showed a differential expression pattern in each pH condition even when acidic conditions prevailed at the end of the experiment. After comparing transcriptomics data from the three treatments, we found a total of 4,943 unique transcripts that were differentially expressed. CONCLUSIONS We identified transcripts related to pH signaling such as the conserved PAL/RIM pathway, some transcripts related to secondary metabolism and other transcripts that were differentially expressed. Our analysis suggests possible mechanisms involved in pathogenicity in this novel Fusarium species. This is the first report that shows transcriptomic data of this pathogen as well as the first report of genes and proteins involved in their metabolism identifying potential virulence factors.
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Affiliation(s)
- Diana Sánchez-Rangel
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
- Cátedra CONACYT en el Instituto de Ecología A.C, Xalapa, Veracruz Mexico
| | - Eric-Edmundo Hernández-Domínguez
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
- Cátedra CONACYT en el Instituto de Ecología A.C, Xalapa, Veracruz Mexico
| | - Claudia-Anahí Pérez-Torres
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
- Cátedra CONACYT en el Instituto de Ecología A.C, Xalapa, Veracruz Mexico
| | - Randy Ortiz-Castro
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
- Cátedra CONACYT en el Instituto de Ecología A.C, Xalapa, Veracruz Mexico
| | - Emanuel Villafán
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
| | - Benjamín Rodríguez-Haas
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
| | | | - Abel López-Buenfil
- Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria, Unidad Integral de Diagnóstico, Servicios y Constatación, 55740 Tecámac, Estado de México Mexico
| | - Nayeli Carrillo-Ortiz
- Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria, Unidad Integral de Diagnóstico, Servicios y Constatación, 55740 Tecámac, Estado de México Mexico
| | - Lervin Hernández-Ramos
- Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria, Unidad Integral de Diagnóstico, Servicios y Constatación, 55740 Tecámac, Estado de México Mexico
| | - Enrique Ibarra-Laclette
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A.C, 91070 Xalapa, Veracruz Mexico
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