Phytopathogens
Mostrando 13-24 de 64 artigos, teses e dissertações.
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13. Screening of actinomycetes from earthworm castings for their antimicrobial activity and industrial enzymes
Actinomycetes from earthworm castings were isolated and screened for their antimicrobial activity and industrial enzymes. A total of 48 isolates were obtained from 12 samples of earthworm castings. Highest numbers of isolates were recovered from forest site (58.33 %) as compared to grassland (25%) and agricultural land (16.66%). The growth patterns, mycelial
Brazilian Journal of Microbiology. Publicado em: 2012-03
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14. Potencial biotecnológico de fungos isolados do molusco Pugilina morio / Biotechnological potential of fungi isolated from shellfish Pugilina morio
This study aimed to investigate the biotechnological potential of fungi isolated from mollusk Pugilina morio. The development work began with the collection of mollusk P. morio in Barra do Ceará, a beach situated in Fortaleza-CE. Of the specimens collected were isolated three filamentous fungi, known as PM3, PM6 and PM9. The isolates were identified by mole
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
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15. Erradicação de inóculo de fitopatógenos na água de irrigação para viveiros florestais / Eradication of phytopathogens inoculum to forest nurseries irrigation water
No passado, não havia conscientização em minimizar o consumo de água em virtude de sua abundância e facilidade de obtenção. Entretanto, atualmente tem aumentado o interesse pelo uso racional da água e sua reutilização, especialmente em viveiros florestais. Porém, antes de sua reutilização, a água tem que ser devidamente tratada visando à errad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
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16. In Vitro antifungal potency of plant extracts against five phytopathogens
The antifungal activity of aqueous extract of Cannabis sativa, Parthenium hysterophorus, Urtica dioeca, Polystichum squarrosum and Adiantum venustum was investigated against Alternaria solani, Alternaria zinniae, Curvularia lunata, Rhizoctonia solani and Fusarium oxysporum at different concentrations (5, 10, 15 and 20%). At 20%, maximum antifungal potential
Brazilian Archives of Biology and Technology. Publicado em: 2011-12
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17. Characterization of a chitinase with antifungal activity from a native Serratia marcescens B4A
Chitinases have the ability of chitin digestion that constitutes a main compound of the cell wall in many of the phytopathogens such as fungi. In the following investigation, a novel chitinase with antifungal activity was characterized from a native Serratia marcescens B4A. Partially purified enzyme had an apparent molecular mass of 54 kDa. It indicated an o
Brazilian Journal of Microbiology. Publicado em: 2011-09
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18. Phytochemical and antifungal activity of anthraquinones and root and leaf extracts of Coccoloba mollis on phytopathogens
The aim of this work was to study the phytochemical and antifungal activity of anthraquinones and root and leaf extracts of Coccoloba mollis on phytopathogens. The chemical analysis of ethanolic extracts showed a mixture of long-chain hydrocarbons, carboxyl esters and 3-taraxerone in the leaf extract. Two anthraquinones (emodin and physcion) were isolated an
Brazilian Archives of Biology and Technology. Publicado em: 2011-06
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19. Formulação do fungo Coniothyrium minitans para controle do mofo-branco causado por Sclerotinia sclerotiorum.
O fungo Sclerotinia sclerotiorum, agente causal do mofo-branco, tem controle dificultado pela longevidade de seus escleródios no solo. Uma estratégia alternativa de controle é o uso do fungo antagonista Coniothyrium minitans, que parasita os escleródios de S. sclerotiorum e reduz a incidência da doença. O objetivo deste trabalho foi desenvolver uma for
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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20. Differential gene expression, induced by salicylic acid and Fusarium oxysporum f. sp. lycopersici infection, in tomato.
The objective of this work was to determine the transcript profile of tomato plants (Lycopersicon esculentum Mill.), during Fusarium oxysporum f. sp. lycopersici infection and after foliar application of salicylic acid. The suppression subtractive hybridization (SSH) technique was used to generate a cDNA library enriched for transcripts differentially expr
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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21. The screening of microorganisms antagonistic to phytopathogens.
Em geral, existem duas opcoes para a selecao de agentes de controle biologico de fitopatogenos. Na primeira opcao, os organismos podem ser testados como antagonicos em condicoes controladas (no laboratorio e/ou camara de crescimento ou em casa de vegetacao). A seguir, os isolados mais promissores sao testados em condicoes de campo para uma avaliacao final. E
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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22. Interação molecular planta-nematóide.
ABSTRACT: The endoparasitic sedentary phytonematodes of genera Heterodera, Globodera (known as cyst nematodes, CN) and Meloidogyne (the root-knot nematodes, RKN) are major crop phytopathogens, causing estimated losses of US$ 125 billion annually in the world. These plant-parasitic nematodes share some parasitism mechanisms, which ensure host-tissue invasion
Planaltina. Publicado em: 2011
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23. Especificidade patogênica e compatibilidade vegetativa entre isolados de Colletotrichum acutatum dos citros e de outros hospedeiros / Pathogenic specificity and vegetative compatibility among isolates of Colletotrichum acutatum from citrus and other hosts
Colletorichum acutatum é o agente causal da Podridão Floral dos Citros (PFC), doença que em determinadas condições ambientais constitui-se em fator limitante à produção citrícola em várias regiões produtoras do mundo. Além da PFC, esse fungo causa antracnose em outros hospedeiros, sendo um dos patógenos que mais acarreta danos em frutíferas tro
Publicado em: 2011
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24. Phosphate solubilization potential and phosphatase activity of rhizospheric Trichoderma spp.
Trichoderma sp., a well known biological control agent against several phytopathogens, was tested for its phosphate (P) solubilizing potential. Fourteen strains of Trichoderma sp. were isolated from the forest tree rhizospheres of pinus, deodar, bamboo, guava and oak on Trichoderma selective medium. The isolates were tested for their in-vitro P-solubilizing
Brazilian Journal of Microbiology. Publicado em: 23/04/2010