Nutrição e crescimento do fungo nematófago Arthrobotrys oligospora

Cardoso, Eliane Ribeiro; Assis, Luiz Carlos; Nahas, Ely

doi:10.1590/s0100-54052009000400003

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…In the present study, laboratory, greenhouse, and field tests were conducted to assess the activity of A. oligosporus C-2197 as a biocontrol for Meloidogyne spp. The in vitro tests showed that A. oligosporus C-2197 grew differently depending on the type of medium used, similar to previous reports 40,41 . Our results are also consistent with previous work on the predatory activity of A. oligosporus controlling second instar juveniles of Meloidogyne spp.…”

Section: Discussionsupporting

confidence: 90%

Assessing the predatory activity of Arthrobotrys oligosporus strain C-2197 as biocontrol of the root-knot nematode Meloidogyne spp.

Quevedo

Vera-Morales

Espinoza-Lozano

et al. 2021

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The root-knot nematode, Meloidogyne spp., is an endoparasite that infects plants' root system and causes yield losses in several important crops. Meloidogyne is one of the most devastating pests, so searching for effective biological agents is needed to mitigate its damage. In this study, the predatory activity of Arthrobotrys oligosporus Fresen strain C-2197, obtained from a tropical dry forest of Ecuador, was evaluated as a biocontrol alternative for root-knot caused by Meloidogyne spp. Our results showed that A. oligosporus C-2197 has predatory activity against juvenile nematodes, 72.31%, and 79% efficacy, for in vitro and greenhouse conditions. Besides, the studied strain showed growth-promoting activity, increasing leaf and root area of inoculated plants. Growth promoting activity was also observed in field tests. The present study validates the potential use of A. oligosporus as a biocontrol of Meloidogyne spp. in tomato production systems under greenhouse. It also presents useful information on the use of different cultivation media and substrates for massive A. oligosporus spore concentrates.

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Section: Discussionsupporting

confidence: 90%

Assessing the predatory activity of Arthrobotrys oligosporus strain C-2197 as biocontrol of the root-knot nematode Meloidogyne spp.

Quevedo

Vera-Morales

Espinoza-Lozano

et al. 2021

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“…As placas foram seladas e incubados à temperatura de 25 ºC ± 1 e fotoperíodo de 12 horas. (CARDOSO et al, 2009). Após 24 horas da instalação do experimento, iniciou-se a avaliação do crescimento fúngico através da mensuração diária do diâmetro das colônias até o crescimento do fungo no tratamento controle alcançar mais de 90% das placas.…”

Section: Avaliação Da Atividade Fungitóxicaunclassified

Óleo essencial das folhas de cataia (Drimys brasiliensis) sobre o crescimento micelial de Alternaria porri

et al. 2021

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O objetivo deste trabalho foi avaliar o potencial do óleo essencial de cataia (Drimys brasiliensis Miers) no controle do crescimento micelial do fungo Alternaria porri. Informações sobre novos compostos para o controle deste fungo são importantes pois estes são responsáveis por danos em diferentes culturas como alho e batata. O óleo essencial foi extraído de folhas frescas de cataia, por hidrodestilação. Para a avaliação do efeito do óleo essencial no crescimento micelial do fungo A. porri, alíquotas do óleo foram incorporados no meio de cultura do BDA nas doses de 0 (controle), 100, 250 e 500 ppm. Um disco de meio BDA contendo micélio e propágulos fúngicos, com aproximadamente 5 mm de diâmetro, foi colocado no centro de cada placa de Petri com o meio de cultura BDA, acrescido das diferentes concentrações do óleo essencial. As placas foram seladas e incubadas à temperatura de 25 ºC ± 1, com fotoperíodo de 12 horas, sendo aferidas, diariamente, o diâmetro das colônias. Com os dados de crescimento micelial, calculou-se a Área Abaixo da Curva de Crescimento Micelial e o Índice de Velocidade de Crescimento Micelial. Todos os tratamentos foram estatisticamente diferentes e os resultados indicaram inibição do crescimento dependente da dose, alcançando 55% de inibição a 500 ppm. Além disso, foi observado a redução da velocidade do crescimento fúngico (em cm/h), na dose de 500 ppm em relação ao controle.

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“…Numerous losses to agricultural production have been attributed to nematodes by interfering with the dynamics of physiological processes of plants (Mattos et al 2006). Although many fungal predators of nematodes have been isolated and identified, much about the growth of these fungi in the soil (Cardoso et al 2009) and their predatory activity is not yet known.…”

Section: Introductionmentioning

confidence: 99%

Predatory activity of nematophagous fungi againstPanagrellus redivivusin the soil under different plant species

Cardoso

Nahas

2015

Biological Agriculture & Horticulture

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The distribution of total and nematophagous fungi and nematodes is influenced by different plant species and environmental factors. The effect of moisture content and soil organic matter (SOM) in the frequency of fungi and nematodes was examined in Eutrustox soil with lettuce (Lactuca sativa), banana (Musa cavendishii), impatiens (Impatiens walleriana) and bahiagrass (Paspalum notatum). Total fungi and nematophagous counts were made in the rhizosphere soil (RS) and non-rhizosphere soil (NRS). The fungi were isolated from each soil, and their ability to predate Panagrellus redivivus nematode was evaluated. The fungi frequency in the RS and NRS ranged from 6.9 to 25.6 £ 10 5 and from 6.9 to 31.2 £ 10 5 CFU g 21 soil, respectively, and nematophagous fungi accounted for 21-34% and 16-33% of total fungi, respectively. The total and nematophagous fungi counts of RS decreased in the order lettuce. banana. bahiagrass. impatiens and lettuce. impatiens. banana. bahiagrass, respectively. Both total and nematophagous fungi counts from NRS decreased in the order lettuce. banana. bahiagrass. impatiens. A positive and significant correlation showed that fungi counts were influenced by the SOM and moisture contents. The abundance of nematodes was influenced by plant species, ranging from 0 to 4.0 £ 10 3 100 g 21 dry soil or roots. It can be concluded that the distribution of total and nematophagous fungi, and nematodes relates to plant species and the SOM and moisture contents.

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Nutrição e crescimento do fungo nematófago Arthrobotrys oligospora

Cited by 6 publications

References 20 publications

Assessing the predatory activity of Arthrobotrys oligosporus strain C-2197 as biocontrol of the root-knot nematode Meloidogyne spp.

Assessing the predatory activity of Arthrobotrys oligosporus strain C-2197 as biocontrol of the root-knot nematode Meloidogyne spp.

Óleo essencial das folhas de cataia (Drimys brasiliensis) sobre o crescimento micelial de Alternaria porri

Predatory activity of nematophagous fungi againstPanagrellus redivivusin the soil under different plant species

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