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Fusarium oxysporum

About: Fusarium oxysporum is a(n) research topic. Over the lifetime, 11499 publication(s) have been published within this topic receiving 225008 citation(s). more


Open accessBook
20 Jun 2006-
Abstract: Foreword Preface 1. Introduction Techniques and Methods 2. Media - Recipes and Preparation 2.1 Media for Growing and Identifying Fusarium 2.2 Supplementary Identification Media 2.3 Media for Isolating Fusarium 2.4 Media for the Preparation of Natural Inocula 2.5 Synthetic and Semi-synthetic Media 2.6 Media for Sexual Crosses 2.7 Sterilization of Media and Materials 3. Techniques for Recovering Fusarium 3.1 Collecting strategy(ies) 3.2 Isolation Techniques - Plants 3.3 Isolation Techniques - Soil 3.4 Isolation Techniques - Spore Trapping and Air Sampling 3.5 Seed Disinfestation 4. Techniques for Growing and Maintaining Fusarium 4.1 Vegetative Propagation 4.2 Preparing Cultures for Identification 4.3 Single Spore Subcultures 4.4 Mutagenesis 4.5 Culture Preservation 5. Vegetative Compatibility Groups (VCGs) 5.1 History of and Genetic Basis Underlying Vegetative Compatibility 5.2 Overall Strategy for Determining if Strains are Vegetatively Compatible 5.3 Recovering and Identifying nit Mutants 5.4 Typical Pairing Protocols 5.5 Common Trouble Spots - HSI, crn, and NitMs 5.6 Characterizing a Population with VCGs 6. Fertility Concepts 6.1 Heterothallic, Homothallic and Pseudohomothallic 6.2 Mating Type 6.3 Population Effects of Mating Type 6.4 Male, Female, and Hermaphrodite 6.5 Crossing Protocols 6.6 Developing Female-Fertile Tester Strains 6.7 Species Identification Through Sexual Crosses 7. Nucleic Acid Analyses 7.1 DNA Extraction and Purification 7.2 PCR - Mating-Type Alleles 7.3 Amplified Fragment Length Polymorphisms (AFLPs) 7.4 Sequence Analysis and Sequenced Loci 7.5 Genetic Maps Taxonomy and Identification of Fusarium 8. A Brief History of Fusarium Taxonomy 9. Species Concepts in Fusarium 9.1 Generic Problems in Speciation in Fusarium 9.2 Morphological Species Concepts 9.3 Biological Species Concepts 9.4 Phylogenetic Species Concepts 9.5 How Many Strains Make a Species? 9.6 Species Names 9.7 Subspecific Terminology 9.8 A Species Concept for Fusarium 10. Teleomorphs of Fusarium 10.1 Taxonomy of Teleomorphs 10.2 General Teleomorph Characters 10.3 Sexual Development and Differentiation 10.4 Spore Killer 10.5 Anamorph-Teleomorph Connections 11. Practical Approaches to Identification 11.1 Overall Identification Strategy 11.2 The Diseased Plant and Its Geographic Origin 11.3 Native and Agricultural Populations 11.4 Culture Preparation 11.5 The Essence of Morphological Identifications 11.6 Beyond Morphology - Sexual Cross Fertility 11.7 Beyond Morphology - Molecular Diagnostics 11.8 The Special Case of Fusarium oxysporum 11.9 Differences Between Temperate and Tropical Regions 11.10 Conclusions Species Descriptions 12. Morphological Characters 12.1 Macroconidia 12.2 Microconidia 12.3 Chlamydospores 12.4 Other Characters 12.5 Secondary Characters 13. Species Descriptions F. acuminatum F. acutatum F. andiyazi F. anthophilum F. armeniacum F. avenaceum F. aywerte F. babinda F. begoniae F. beomiforme F. brevicatenulatum F. bulbicola F. camptoceras F. chlamydosporum F. circinatum F. compactum F. concentricum F. crookwellense (F. cerealis) F. culmorum F. decemcellulare F. denticulatum F. dimerum F. dlamini F. equiseti F. foetens F. fujikuroi F. globosum F. graminearum F. guttiforme F. heterosporum F. hostae F. konzum F. lactis F. lateritium F. longipes F. mangiferae F. merismoides F. miscanthi F. musarum F. napiforme F. nelsonii F. nisikadoi F. nurragi F. nygamai F. oxysporum F. phyllophilum F. poae F. polyphialidicum F. proliferatum F. pseudoanthophilum F. pseudocircinatum F. pseudograminearum F. pseudonygamai F. ramigenum F. redolens F. sacchari F. sambucinum F. scirpi F. semitectum (F. incarnatum) F. solani F. sporotrichioides F. sterilihyphosum F. subglutinans F. succisae F. thapsinum F. torulosum F. tricinctum F. udum F. venenatum F. verticillioides References Index more

Topics: Fusarium subglutinans (60%), Fusarium sacchari (60%), Fusarium incarnatum (59%) more

2,961 Citations

Journal ArticleDOI: 10.1016/S0927-7765(02)00174-1
Abstract: The development of reliable, eco-friendly processes for the synthesis of nanomaterials is an important aspect of nanotechnology today. One approach that shows immense potential is based on the biosynthesis of nanoparticles using biological micro-organisms such as bacteria. In this laboratory, we have concentrated on the use of fungi in the intracellular production of metal nanoparticles. As part of our investigation, we have observed that aqueous silver ions when exposed to the fungus Fusarium oxysporum are reduced in solution, thereby leading to the formation of an extremely stable silver hydrosol. The silver nanoparticles are in the range of 5-15 nm in dimensions and are stabilized in solution by proteins secreted by the fungus. It is believed that the reduction of the metal ions occurs by an enzymatic process, thus creating the possibility of developing a rational, fungal-based method for the synthesis of nanomaterials over a range of chemical compositions, which is currently not possible by other microbe-based methods. more

Topics: Silver nanoparticle (61%), Fusarium oxysporum (51%)

1,569 Citations

Open accessJournal ArticleDOI: 10.1073/PNAS.95.5.2044
Abstract: Panama disease of banana, caused by the fungus Fusarium oxysporum f. sp. cubense, is a serious constraint both to the commercial production of banana and cultivation for subsistence agriculture. Previous work has indicated that F. oxysporum f. sp. cubense consists of several clonal lineages that may be genetically distant. In this study we tested whether lineages of the Panama disease pathogen have a monophyletic origin by comparing DNA sequences of nuclear and mitochondrial genes. DNA sequences were obtained for translation elongation factor 1α and the mitochondrial small subunit ribosomal RNA genes for F. oxysporum strains from banana, pathogenic strains from other hosts and putatively nonpathogenic isolates of F. oxysporum. Cladograms for the two genes were highly concordant and a partition-homogeneity test indicated the two datasets could be combined. The tree inferred from the combined dataset resolved five lineages corresponding to “F. oxysporum f. sp. cubense” with a large dichotomy between two taxa represented by strains most commonly isolated from bananas with Panama disease. The results also demonstrate that the latter two taxa have significantly different chromosome numbers. F. oxysporum isolates collected as nonpathogenic or pathogenic to other hosts that have very similar or identical elongation factor 1α and mitochondrial small subunit genotypes as banana pathogens were shown to cause little or no disease on banana. Taken together, these results indicate Panama disease of banana is caused by fungi with independent evolutionary origins. more

Topics: Fusarium oxysporum f.sp. cubense (66%), Panama disease (64%), Fusarium oxysporum (61%) more

1,336 Citations

Open accessJournal ArticleDOI: 10.1038/NATURE08850
18 Mar 2010-Nature
Abstract: Fusarium species are among the most important phytopathogenic and toxigenic fungi. To understand the molecular underpinnings of pathogenicity in the genus Fusarium, we compared the genomes of three phenotypically diverse species: Fusarium graminearum, Fusarium verticillioides and Fusarium oxysporum f. sp. lycopersici. Our analysis revealed lineage-specific (LS) genomic regions in F. oxysporum that include four entire chromosomes and account for more than one-quarter of the genome. LS regions are rich in transposons and genes with distinct evolutionary profiles but related to pathogenicity, indicative of horizontal acquisition. Experimentally, we demonstrate the transfer of two LS chromosomes between strains of F. oxysporum, converting a non-pathogenic strain into a pathogen. Transfer of LS chromosomes between otherwise genetically isolated strains explains the polyphyletic origin of host specificity and the emergence of new pathogenic lineages in F. oxysporum. These findings put the evolution of fungal pathogenicity into a new perspective. more

Topics: Fusarium oxysporum (61%), Fungal genetics (53%), Fusarium (51%) more

1,205 Citations

Journal ArticleDOI: 10.1016/S0007-1536(71)80077-3
Abstract: Isolates from different species-groups of Trichoderma were tested for production of non-volatile antibiotics, by an agar layer technique. Preliminary studies on the chemical nature of these antibiotics were made. Many isolates produced non-volatile antibiotics active against a range of fungi. The ability to produce such antibiotics varied between isolates of the same species-group as well as between isolates of different species groups. The susceptibility of fungi to these antibiotics varied widely; Fomes annosus (Fr.) Cooke was the most susceptible and Fusarium oxysporum Schlecht, ex Fr. the most resistant of the test fungi used. Gliotoxin and viridin were not produced, but other chloroform-soluble antibiotics, including trichodermin and peptide antibiotics were detected. more

Topics: Trichoderma (55%), Fusarium oxysporum (52%), Antibiotics (51%)

1,043 Citations

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Topic's top 5 most impactful authors

Maria Lodovica Gullino

71 papers, 1.3K citations

Claude Alabouvette

58 papers, 4.6K citations

Angelo Garibaldi

54 papers, 1.1K citations

Qirong Shen

47 papers, 1.9K citations

Antonio Di Pietro

38 papers, 2.2K citations

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