Morfologia, Funções Dos Soros E Variações Dos Ciclos Vitais Das Ferrugens

Figueiredo, M. B.; Passador, Martha Maria

doi:10.1590/1808-1657v75p1172008

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…To date, there are few reports of pests and diseases affecting guabiju in Brazil. However, there are several studies confirming that fungi belonging to the Puccioniaceae family cause diseases of economic importance in species of the Myrtaceae family AMORIM, 1996;FIGUEIREDO;PASSADOR, 2008). Regarding the Puccioniaceae family, Austropuccinia psidii (G. Winter) Beenken (syn.…”

Section: Introductionmentioning

confidence: 99%

“…(NASCIMENTO; and uvaia (Eugenia pyriformis Cambess) (PIERI, 2012). In Brazil, rusts cause large losses due to environmental conditions favorable for the development of the disease (FIGUEIREDO;PASSADOR, 2008;APARECIDO;VALE, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The causal agents of rust are obligate parasites (biotrophs) (APARECIDO, 2001;FIGUEIREDO;PASSADOR, 2008), which remove the nutrients they need directly from the host's living cells through haustoria (FERREIRA, 1989). The spread of the disease occurs through the dispersal of urediniospores by wind, rain, irrigation or splashing water, and by insects and birds.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of Rust in Myrcianthes pungens (O. BERG) D. Legrand Caused by Austropuccinia psidii in The State of Rio Grande do Sul

et al. 2022

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Guabiju tree (Myrcianthes pungens) belongs to the Myrtaceae family, with wide occurrence in Rio Grande do Sul (RS), southern Brazil, demonstrates great commercial potential regarding the consumption of its fresh fruit, which has a sweet taste and can be used in drinks, jellies and ice creams, in addition to its nutraceutical properties. As their main characteristic, rusts present the formation of orange pustules containing urediniospores of the pathogen on affected organs. The action of the pathogen causes deformation of stems, leaves, flowers and fruits, thus interfer-ing with the physiological processes of the plant. Thus, the present work aimed at presenting information on the occurrence and confirmation of the causal agent of guabiju rust, in addition to reporting the accessions most susceptible and resistant to Austropuccinia in the guabiju working collection of Eldorado do Sul, RS, Brazil. The diagnosis of the disease was based on symptoms, observation of fungal structures by light microscopy and molecular analyses. From microscopy, ellipsoid to ovoid and slightly equinulate urediniospores were observed, characteristic of Austropuccinia sp. The sequence of the internal transcribed spacer (ITS) region of the isolate showed 99.06% similarity with sequences from the same region of A. psidii deposited on the nucleotide database - GenBank (NCBI). This is the first report of rust associated with guabiju in the state of Rio Grande do Sul, Brazil. From the diagrammatic scale developed, it was possible to identify different levels of susceptibility to A. psidii in guabiju accessions under study.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Occurrence of Rust in Myrcianthes pungens (O. BERG) D. Legrand Caused by Austropuccinia psidii in The State of Rio Grande do Sul

et al. 2022

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“…In this context, despite the knowledge about the negative effect of rusts on hosts, there are no studies on the etiology or epidemiology of P. velata on candeia trees. The characteristics that hinder the study of rusts include their biotrophic parasitism strategy because they grow only on their specific living hosts [12]. After the first report of P. velata in E. erythropappus in 1897 by Dietel in Ouro Preto, Minas Gerais, few studies have been conducted on this pathogen.…”

Section: Introductionmentioning

confidence: 99%

Temporal Progress of Candeia Rust Caused by Puccinia velata in Clonal Candeia Plantation (Eremanthus erythropappus (DC.) McLeisch)

Pereira

Ferreira

Soares

et al. 2020

Forests

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The temporal progress of candeia rust, caused by the fungus Puccinia velata, was monitored in an experimental field at Lavras municipality, Southern Minas Gerais state, Brazil. A plantation with 17 Eremanthus erythropappus clones was set at the site, and the temporal disease progress was analyzed based on visual assessments of disease severity on leaves. The disease was monitored monthly between September 2016 and August 2017. Progress curves based on disease severity were constructed and empirical models were fitted. The area under the disease progress curve (AUDPC) was calculated, and the means test was applied to select clones resistant to the disease. The Pearson coefficient was used to assess correlations between disease severity and environmental variables. The model that best described disease progress over the assessment period was the Gompertz model. The mean AUDPC values were grouped into four groups of resistance levels according to the Scott–Knott test. There was a negative correlation between air temperature and disease severity. Considering that the disease occurred in all clones and that the climatic conditions of Southern Minas Gerais are favorable to the candeia rust, it is important to adopt measures for the selection of clones resistant to this disease.

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Ocorrência de ferrugem em Handroanthus impetiginosus e Handroanthus vellosoi no estado de Mato Grosso do Sul

et al. 2018

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Resumo A mais importante doença que ocorre em ipês é a ferrugem causada por fungos pertencentes ao gênero Prospodium, da ordem Pucciniales. O objetivo desse trabalho foi contribuir para o conhecimento das espécies de fungos que causam ferrugem em ipês apresentando a identificação e a descrição morfológica dos esporos de duas espécies do gênero Prospodium coletadas em Aquidauana-MS. As amostras de plantas com sintomas foram coletadas no campus da Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Aquidauana, região do ecótono Cerrado-Pantanal. Os esporos de Prospodium bicolor e P. tecomicola foram obtidos diretamente de folhas com sintomas de seus respectivos hospedeiros Handroanthus impetiginosus (ipê roxo) e H. vellosoi (ipê amarelo), e avaliados de acordo com seu estádio esporífero. Ambas as espécies de fungos causadores de ferrugem apresentaram mesósporos descritos aqui pela primeira vez para estas espécies. Este trabalho, representa o primeiro registro da ocorrência dessas ferrugens nas espécies hospedeiras de H. impetiginosus e H. vellosi no estado de Mato Grosso do Sul.

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Morfologia, Funções Dos Soros E Variações Dos Ciclos Vitais Das Ferrugens

Cited by 5 publications

References 12 publications

Occurrence of Rust in Myrcianthes pungens (O. BERG) D. Legrand Caused by Austropuccinia psidii in The State of Rio Grande do Sul

Occurrence of Rust in Myrcianthes pungens (O. BERG) D. Legrand Caused by Austropuccinia psidii in The State of Rio Grande do Sul

Temporal Progress of Candeia Rust Caused by Puccinia velata in Clonal Candeia Plantation (Eremanthus erythropappus (DC.) McLeisch)

Ocorrência de ferrugem em Handroanthus impetiginosus e Handroanthus vellosoi no estado de Mato Grosso do Sul

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