Basal Rot of Syngonium Cultivars and the First Record of Ceratocystis Fimbriata From Australia.

Walker, J.; Tesoriero, L.; Pascoe, I. G.; Forsberg, L. I.

doi:10.1071/app9880022

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…[ 75 , 77 , 78 ], Ficus carica [ 75 , 79 ], Punica granatum [ 80 , 81 ], Colocasia esculenta [ 80 , 82 , 83 ], Theobroma cacao [ 11 ], Gmelina arborea [ 84 , 85 ], Syngonium sp. [ 86 , 87 ] and Ilex paraguariensis [ 88 , 89 ]. In contrast, C. cacaofunesta has only been described in Theobroma cacao [ 90 ] and in species from the genus Herrania sp.…”

Section: Discussionmentioning

confidence: 99%

Uncovering a Complex Virome Associated with the Cacao Pathogens Ceratocystis cacaofunesta and Ceratocystis fimbriata

et al. 2023

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Theobroma cacao is one of the main crops of economic importance in the world as the source of raw material for producing chocolate and derivatives. The crop is the main source of income for thousands of small farmers, who produce more than 80% of the world’s cocoa supply. However, the emergence, re-emergence and proliferation of pathogens, such as Ceratocystis spp., the causative agent of Ceratocystis wilt disease and canker disease, have been affecting the sustainability of many crops. Fungal control is laborious, often depending on fungicides that are expensive and/or toxic to humans, prompting researchers to look for new solutions to counteract the proliferation of these pathogens, including the use of biological agents such as mycoviruses. In this study, we investigated the diversity of microorganisms associated with the T. cacao pathogens Ceratocystis cacaofunesta and Ceratocystis fimbriata with a focus on the virome using RNA sequencing data available in public databases. We used a comprehensive bioinformatics pipeline containing several steps for viral sequence enrichment and took advantage of an integrated assembly step composed of different assemblers followed by sequence similarity searches using NCBI nonredundant databases. Our strategy was able to identify four putative C. cacaofunesta viruses (hypovirus, sclerotimonavirus, alphapartitivirus and narnavirus) and six C. fimbriata viruses (three alphaendornaviruses, one victorivirus and two mitoviruses). All the viral sequences identified showed similarity to viral genomes in public databases only at the amino acid level, likely representing new viral species. Of note, we present the first report of viruses associated with the cacao pathogens C. cacaofunesta and C. fimbriata and the second report of viral species infecting members of the Ceratocystidaceae family. Our findings highlight the need for further prospective studies to uncover the real diversity of fungus-infecting viruses that can contribute to the development of new management strategies.

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Section: Discussionmentioning

confidence: 99%

Uncovering a Complex Virome Associated with the Cacao Pathogens Ceratocystis cacaofunesta and Ceratocystis fimbriata

et al. 2023

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“…Because there may be extensive mycelial growth within a plant before symptoms appear, propagative cuttings may be an effective pathway of dispersal. Infected Syngonium cuttings were the apparent means of spread of the Syngonium form of the fungus throughout the greenhouse industry (Thorpe et al, 2005;Walker et al, 1988). C. fimbriata has also been found in both symptomatic and apparently healthy eucalyptus cuttings in a Brazilian eucalyptus plantation (Harrington, 2000).…”

Section: Identification Of Pathwaysmentioning

confidence: 99%

Pest risk assessment made by France on Ceratocystis fimbriata considered by France as harmful in French overseas departments of French Guiana, Guadeloupe, Martinique and Réunion - Scientific Opinion of the Panel on Plant Health

Baker

Caffier²,

Choiseul

et al. 2008

EFSA Journal

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“…Later reports in Hawaii and Australia confirmed the disease on S. podophyllum and other Syngonium spp. (71,74,75). Ceratocystis basal rot of Syngonium spp.…”

Section: Iowa State Universitymentioning

confidence: 99%

“…The pathogen on X. sagittifolium, a plant native to Latin America, perhaps northern South America, was reported in Fiji (75), and C. fimbriata was reported on Alocasia in Florida (3). fimbriata from the Araceae, but Araceae isolates generally do not infect dicotyledonous hosts (3,10,18,19,20,22,28,29).…”

Section: Iowa State Universitymentioning

confidence: 99%

Phylogenetics, intersterility and host specialization of Ceratocystis fimbriata from Brazil and the family Araceae

Thorpe¹

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Materials and Methods Results Discussion Acknowledgements 31 Literature Cited 31 Chapter 3. Genetic diversity and pathogenicity of Brazilian isolates of 43 Ceratocystis fimbriata Abstract 43 Materials and Methods 46 Results 53 Discussion 60 Acknowledgements 64 Literature Cited 64 Chapter 4. Conclusions 86 References 89 Acknowledgments 101 1 Chapter 1. Introduction Thesis OrganizationThis thesis consists of four chapters: an introduction and literature review (Ch. 1); two papers for journal publication (Ch. 2-3); and a general discussion and conclusion (Ch. 4).References cited in the introduction, literature review, and conclusions are at the end of the thesis. Literature cited for chapters 2-3 are at the end of the respective chapters. General IntroductionCeratocystis fimbriata Ellis &Halsted is a complex of many cryptic species known to be pathogenic to many economically important plants throughout the world. This fungus serves as a great model to investigate the definition of a species because of its unique biology, wide host range, and economic importance. The definition of a species has been and will continue to be a debatable issue. The species definition that will be used in these studies is a phylogenetic species concept incorporating population biology, lineages, and phenotypic characteristics (31). A fungus species is "the smallest aggregation of populations with a common lineage that ,share unique, diagnostic phenotypic characters," (31, page 19).Phylogenetic analyses of C. fimbriata indicate that isolates are separated into three geographical Glades centered in North America, Latin America, and Asia (27). Within the Latin American Glade, three distinct lineages are associated with three hosts: Platanus spp., Theobroma cacao, and Ipomoea batatas (6). There are many other hosts of the Latin American Glade, most of which are found infected in Brazil. Five of these hosts, all exotic to Brazil, include Gmelina arborea, Eucalyptus spp., Mangifera indica, Ficus carica, and Colocasia esculenta.There is little morphological variation within the Latin American Glade of Ceratocystis fimbriata, but host specialization may serve as a phenotypic character to diagnose species. Numerous studies have shown some isolates of C. fimbriata are uniquely pathogenic to their respective hosts. Such host specialization has been found for isolates from I. batatas, Platanus spp., T. cacao, G. arborea and Eucalyptus spp. (6). This thesis examines isolates from five economically important crops in Brazil: G. arborea, Eucalyptus spp., M. indica, F. carica, and Colocasia esculenta. To test the hypothesis that Brazilian isolates from these f ve exotic hosts are distinct species, two objectives were examined: i) compare the pathogenicity and phylogenetics of Araceae isolates of Ceratocystis fimbriata from around the world, including Colocasia esculenta isolates from Brazil; and ii) determine if host specialization and intersterility exists among isolates from the five exotic hosts of Brazil. Literature Review Ceratocystis fimbriata Ell...

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Basal Rot of Syngonium Cultivars and the First Record of Ceratocystis Fimbriata From Australia.

Cited by 8 publications

References 2 publications

Uncovering a Complex Virome Associated with the Cacao Pathogens Ceratocystis cacaofunesta and Ceratocystis fimbriata

Uncovering a Complex Virome Associated with the Cacao Pathogens Ceratocystis cacaofunesta and Ceratocystis fimbriata

Pest risk assessment made by France on Ceratocystis fimbriata considered by France as harmful in French overseas departments of French Guiana, Guadeloupe, Martinique and Réunion - Scientific Opinion of the Panel on Plant Health

Phylogenetics, intersterility and host specialization of Ceratocystis fimbriata from Brazil and the family Araceae

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