Detecção de fungos patogênicos em sementes de acácia-negra (&lt;i&gt;Acacia mearnsii &lt;/i&gt;De Wild).

Santos, Flávia Elise Meneghini dos; Sobrosa, Rita de Cassia; Costa, Ivan Francisco Dressler da; Corder, Maisa Pimentel Martins

doi:10.5902/19805098491

Cited by 11 publications

(7 citation statements)

References 8 publications

(6 reference statements)

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“…(isolate 1) and L. theobromae were prominent as the most aggressive, since they increased seed mortality in comparison to the control, resulting in a lower percentage of normal seedlings (Table 1). According to SANTOS et al (2001), seeds germination is also affected by the presence of fungi that can cause seedling death or transmit diseases to adult plants. Means transformed into (x + 0.5) ^ 0,5.…”

Section: Resultsmentioning

confidence: 99%

Pathogenicity and transmission of fungi detected on Passiflora alata seeds

et al. 2018

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Passion fruit is usually propagated by seeds because of the ease and lower cost in seedling production. However, the seed is the most efficient agent for the spread of pathogens. The damages from seed-borne diseases occur mainly during the germination stages or at the formation of seedlings in nurseries. Considering the need for knowledge on the pathology of sweet passion fruit seeds, the objective was to evaluate the transmission and pathogenicity of the fungi Alternaria sp., Botrytis fabae, Cladosporium cladosporioides, Fusarium spp. and Lasiodiplodia theobromae, known as potentially pathogenic to this crop, and isolated from sweet passion fruit seeds. Therefore, tests on seed health, germination and seedling emergence in a sterilized commercial substrate were conducted using seeds from this species, inoculated with those fungal isolates. Leaves, stems and fruit from this plant were also inoculated with the same fungi. Alternaria sp., Fusarium spp. and L. theobromae were identified in seedlings obtained from inoculated seeds, confirming the transmission of these fungi by seeds. L. theobromae was also considered the most harmful fungus to passion fruit crop, as it causes seed rot and other disease symptoms on the leaves, stem and fruit. These findings inferred that healthy seeds of sweet passion fruit are essential for producing seedlings and to prevent the spread of the diseases caused by these fungi to exempt areas.

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Section: Resultsmentioning

confidence: 99%

Pathogenicity and transmission of fungi detected on Passiflora alata seeds

et al. 2018

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“…(NASCIMENTO et al, 2006), acácianegra (Acacia mearnsii De Wild.) (SANTOS et al, 2001) and pata-de-vaca (Bauhinia variegata L.) (MARTINELLI-SENEME et al, 2006).…”

Section: Resultsunclassified

Sanitary, physiological quality and alternative treatments of Dimorphandra gardneriana Tul. seeds

Cruz¹,

Silva²,

Nascimento³

et al. 2018

Biosci. J.

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The Dimorphandra gardneriana Tul. species is widely distributed in the Brazilian territory presenting an economic and environmental importance. The aim of this study was to determine the fungi associated with Dimorphandra gardneriana seeds, assessing the influence of nystatin, the castor oil plant and Captan ® fungicide in the control of these fungi in the seed germination and seedlings growth. The experiment was carried out at the

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“…O Fusarium é abundante no solo, fator que pode ter ocasionado a proliferação dos mesmos nas sementes de mogno sem desinfestação, devido a coleta das sementes terem sido realizadas após a dispersão natural da espécie. Para Santos et al (2001) uma maneira para reduzir a contaminação de sementes poderia ser pela coleta dos frutos antes de abertura natural e dispersão. Em um estudo realizado por Benchimol et al (2009), Fusarium spp.…”

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Efeito de Tratamentos Pré-Germinativos e Substratos na Germinação e Crescimento de Plântulas de Mogno-Brasileiro e Africano

et al. 2016

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RESUMO. O mogno-africano foi introduzido no Brasil para ser produzido em escala comercial e substituir o mogno-brasileiro devido à intensa exploração e problemas de pragas, ocasionando a proibição legal da exploração e comercialização desta espécie, o que gerou demanda por produtos alternativos. Diante disso, o objetivo do trabalho é avaliar a germinação, desenvolvimento do mogno-africano e brasileiro em diferentes substratos e tratamento pré-germinativo. O delineamento experimental foi em esquema fatorial de 2 x 3 (duas espécies e três substratos). Foram avaliados o grau de umidade, teste de sanidade, porcentagem de germinação (G%), Índice de Velocidade de Germinação (IVG), Tempo Médio de Germinação, altura (H), diâmetro do colo (DC), número de folhas (NF) e comprimento radicular (CR). A germinação dos mognos brasileiro e africano teve influência positiva dos tratamentos pré-germinativos sem pericarpo. Quanto ao substrato, a vermiculita apresentou melhores resultados para as duas espécies tanto na germinação quanto no desenvolvimento das plântulas. A não desinfestação das sementes dos mognos apresentou maior incidência de fungos na ausência do pericarpo. Diante disso, recomenda-se a utilização de tratamento pré-germinativo para o teste de germinação dos mognos em substrato papel mata-borrão e vermiculita com a desinfestação das sementes antes de semeá-las. Palavras-chave:Produção de mudas, sementes florestais, Meliaceae, Swietenia macrophylla King., Khaya ivorensis A. Chev.ABSTRACT. The African mahogany plant was introduced in Brazil to be produced on a commercial scale and replace the Brazilian mahogany plant, which was intensely exploited and had pest problems resulting in legal prohibition of marketing this species, and thus, promoting the search for alternative products such as the African mahogany. The objective of this study was to evaluate the germination, development, and plant health of both African and Brazilian mahogany planted in different substrates with different pre-germination treatments. The germination of the Brazilian and African mahogany seeds were positively influenced by pre-germination treatments without pericarp. The use of vermiculite substrate showed better results for the germination and development of seedlings of both the plant types. Non-disinfestation of the mahogany seeds without pericarp resulted in increased fungal infection. Therefore, on the basis of the results of the study, we recommend the use of a pre-germination treatment for mahogany seed germination in vermiculite substrate with a seed disinfestation step before sowing.

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Detecção de fungos patogênicos em sementes de acácia-negra (<i>Acacia mearnsii </i>De Wild).

Cited by 11 publications

References 8 publications

Pathogenicity and transmission of fungi detected on Passiflora alata seeds

Pathogenicity and transmission of fungi detected on Passiflora alata seeds

Sanitary, physiological quality and alternative treatments of Dimorphandra gardneriana Tul. seeds

Efeito de Tratamentos Pré-Germinativos e Substratos na Germinação e Crescimento de Plântulas de Mogno-Brasileiro e Africano

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