Estudo preliminar da ação do fungo Ceratocystis fimbriata Eli. &amp; Halst., causador da seca da mangueira (Mangifera indica L.), sobre cacaueiros (Theobroma cacao L.)

Ribeiro, Ivan José Antunes; Coral, Fausto Joaquim

doi:10.1590/s0006-87051968000200029

Cited by 8 publications

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“…The mycetangia may produce anti‐microbial secretions that kill foreign bacteria and fungi (Mayers et al, 2022), and possibly C. lukuohia and C. huliohia . However, some pathogens have neutral or even positive effects on Scolytinae reproduction; for example, H. mangiferae , the vector of C. fimbriata in Brazil, can be reared from cultures of the pathogen (Ribeiro, 1980). The ability of ambrosia beetles to coexist with ROD Ceratocystis spp.…”

Section: Discussionmentioning

confidence: 99%

Ambrosia beetles (Coleoptera: Curculionidae) can directly transmit the fungal pathogens responsible for Rapid ʻŌhiʻa Death

et al. 2023

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The ecologically and culturally vital tree species, ʻōhiʻa lehua (Metrosideros polymorpha), is threatened by the fungal pathogens Ceratocystis lukuohia and Ceratocystis huliohia, the causal agents of the disease complex called Rapid ʻŌhiʻa Death (ROD). Four invasive ambrosia beetle (Coleoptera: Curculionidae: Scolytinae) species in the Xyleborini tribe colonize ROD Ceratocystis-infested 'ōhiʻa and produce inoculum through their frass; however, the potential for direct transmission of the ROD fungi by these beetles was unknown. We fulfilled Leach's rules to support insect transmission of ROD by documenting the visitation of these ambrosia beetles to healthy 'ōhiʻa trees, culturing C. lukuohia and C. huliohia from the ROD-associated beetles using three different collection methods at multiple study sites, and challenging healthy ʻōhiʻa seedlings with beetles that were exposed to both C. lukuohia and C. huliohia cultures. We documented all four invasive ROD-associated ambrosia beetle species including Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, and Xyleborus perforans to regularly visit healthy ʻōhiʻa trees on sticky traps. Viable Ceratocystis propagules were isolated from all species, and C. lukuohia was most commonly isolated of the two ROD-causing fungi. Consistently across all collection techniques, ROD Ceratocystis spp. were detected on just under 3% of all assayed beetles, with the highest detection rate from X. affinis. All four beetle species were capable of directly transmitting both pathogens to healthy ʻōhiʻa seedlings with a high rate of transfer. Ceratocystis spp. are highly virulent pathogens in trees, and a single inoculation can result in tree death, therefore any direct transmission is a cause for concern. After meeting the criteria of Leach's rules, we propose that Xi. saxesenii, X. affinis, X. ferrugineus, and X. perforans are vectors of C. lukuohia and C. huliohia, particularly in areas of high ROD pressure and tree stress.

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Section: Discussionmentioning

confidence: 99%

Ambrosia beetles (Coleoptera: Curculionidae) can directly transmit the fungal pathogens responsible for Rapid ʻŌhiʻa Death

et al. 2023

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“…Ceratocystis fimbriata is well known on M. indica, F. carica, Eucalyptus spp., Gmelina arborea Roxb., Theobroma cacao L. and other hosts in Brazil (Bastos & Evans, 1968;Ribeiro & Coral, 1968;Muchovej et al, 1978;Valarini & Tokeshi, 1980;CABI, 2001;Zauza et al, 2004), but there is some host specialization seen in isolates from these and other hosts (Harrington 2001;Baker et al, 2003). It has been reported on C. esculenta (taro) in Asia and the Pacific, and there are also reports of the fungus on Xanthosoma spp.…”

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First report of black rot of Colocasia esculenta caused by Ceratocystis fimbriata in Brazil

et al. 2005

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Ceratocystis fimbriata was found sporulating in gray to black discolored areas on edible corms of Colocasia esculenta found in supermarkets in the states of São Paulo, Rio de Janeiro, Bahia, Rondônia and the Distrito Federal. In most cases the corms were grown in the state of São Paulo. The black rot appeared to occur post-harvest. Sequences of rDNA indicated that the Colocasia sp. isolates belong to the Latin American clade of the C. fimbriata complex, but the isolates were more aggressive than isolates from Ficus carica and Mangifera indica, in pseudopetioles of C. esculenta.Additional keywords: Aracerae, inhame, taro. RESUMO Primeiro relato de Ceratocystis fimbriata causando podridão negra em inhame no BrasilCeratocystis fimbriata foi encontrado em tubérculos de inhame (Colocasia esculenta), apresentando lesões escuras, pouco profundas, contendo estruturas de reprodução do fungo, cuja coloração variava do cinza ao negro. As amostras foram coletadas em supermercados, quitandas e varejões nos Estados de São Paulo, Rio de Janeiro, Bahia, Rondônia e Distrito Federal que, na maioria dos casos, comercializavam inhame produzido no Estado de São Paulo. Os sintomas de podridão negra indicam se tratar de uma doença de pós-colheita. Seqüências de rDNA indicam que os isolados de Colocasia sp. pertencem ao clado da America Latina do complexo C. fimbriata, embora esses isolados sejam mais agressivos em pseudo-pecíolos de C. esculenta do que os isolados de Ficus carica e Mangifera indica.Palavras-chave adicionais: Aracerae, inhame, taro.

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“…Cross-inoculation experiments with Colocasia esculenta and Ipomoea batatas with their respective isolates from Japan did not show disease symptoms in the other hosts (45). Isolates obtained from Mangifera indica were unable to cause symptoms in Theobroma cacao (55). In a study with S isolates from Acacia decurrens, Crotalaria juncea, Ficus carica, and M. indica, no symptoms were found on Gmelina arborea, L batatas, and T. cacao (35).…”

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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Estudo preliminar da ação do fungo Ceratocystis fimbriata Eli. & Halst., causador da seca da mangueira (Mangifera indica L.), sobre cacaueiros (Theobroma cacao L.)

Cited by 8 publications

References 0 publications

Ambrosia beetles (Coleoptera: Curculionidae) can directly transmit the fungal pathogens responsible for Rapid ʻŌhiʻa Death

Ambrosia beetles (Coleoptera: Curculionidae) can directly transmit the fungal pathogens responsible for Rapid ʻŌhiʻa Death

First report of black rot of Colocasia esculenta caused by Ceratocystis fimbriata in Brazil

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

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