Base de dados : LILACS
Pesquisa : B01.650.940.800.575.912.250.881.666 [Categoria DeCS]
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Id: lil-741276
Autor: Colavolpe, María Belén; Mejía, Santiago Jaramillo; Albertó, Edgardo.
Título: Efficiency of treatments for controlling Trichoderma spp during spawning in cultivation of lignicolous mushrooms
Fonte: Braz. j. microbiol;45(4):1263-1270, Oct.-Dec. 2014. ilus, tab.
Idioma: en.
Resumo: Trichoderma spp is the cause of the green mold disease in mushroom cultivation production. Many disinfection treatments are commonly applied to lignocellulose substrates to prevent contamination. Mushroom growers are usually worried about the contaminations that may occur after these treatments during handling or spawning. The aim of this paper is to estimate the growth of the green mold Trichoderma sp on lignocellulose substrates after different disinfection treatments to know which of them is more effective to avoid contamination during spawning phase. Three different treatments were assayed: sterilization (121 ºC), immersion in hot water (60 and 80 ºC), and immersion in alkalinized water. Wheat straw, wheat seeds and Eucalyptus or Populus sawdust were used separately as substrates. After the disinfection treatments, bagged substrates were sprayed with 3 mL of suspension of conidia of Trichoderma sp (10(5) conidia/mL) and then separately spawned with Pleurotus ostreatus or Gymnopilus pampeanus. The growth of Trichoderma sp was evaluated based on a qualitative scale. Trichoderma sp could not grow on non-sterilized substrates. Immersions in hot water treatments and immersion in alkalinized water were also unfavorable treatments for its growth. Co- cultivation with mushrooms favored Trichoderma sp growth. Mushroom cultivation disinfection treatments of lignocellulose substrates influence on the growth of Trichoderma sp when contaminations occur during spawning phase. The immersion in hot water at 60 ºC for 30 min or in alkalinized water for 36 h, are treatments which better reduced the contaminations with Trichoderma sp during spawning phase for the cultivation of lignicolous species.
Descritores: Agaricales/crescimento & desenvolvimento
Desinfecção/métodos
Trichoderma/crescimento & desenvolvimento
-Álcalis/metabolismo
Anti-Infecciosos/metabolismo
Eucalyptus/microbiologia
Temperatura Alta
Populus/microbiologia
Temperatura Ambiente
Trichoderma/efeitos dos fármacos
Trichoderma/efeitos da radiação
Triticum/microbiologia
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-491536
Autor: Martin, M. T; Pedranzani, H. E; Sierra de Grado, R.
Título: Behavior and preservation of an in vitro collection of European aspen in Spain
Fonte: Biocell;31(1):41-49, abr. 2007. tab, graf.
Idioma: en.
Resumo: An in vitro collection has been Established with selected European aspen from Palencia province (Spain). Currently, this collection includes 32 high quality clones, selected for their good bearing and healthy state. Most of them belong to different discrete local populations. Populus tremula L. was propagated in proliferation Aspen Culture Medium; they required subculture every 3 months. The purpose of this study was, therefore, to select a medium which allows the maintenance of 32 clones for a period longer than 3 months without subculture and to observe the behavior of those clones in 15 different culture medium compositions. Seven nodal cutting stem explants from each clone were cultured in parallel in the different media. One and three months after setting on the stem explants, the number and the size of shoots, the root size, the presence or absence of callus and the survival, were evaluated. The survival was monthly recorded during 8 months. Taking into account the explant development, four media were proposed for collection preservation. One of them, Ga, with a reduction of salts, sucrose, 6-benzoaminopurine, omitting adenine sulphate and 1-naphthalene acetic acid, is the most economical. Behavior observations of the 32 clones in the 15 medium compositions showed the influence of the genotype of the clones.
Descritores: Árvores/crescimento & desenvolvimento
Células Clonais
Estruturas Vegetais/crescimento & desenvolvimento
Meios de Cultura/química
Populus/crescimento & desenvolvimento
-Técnicas de Cultura
Preservação Biológica
Espanha
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: AR40.1 - Biblioteca de la Facultad de Ciencias Médicas de la UNCuyo


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Id: lil-476865
Autor: Palma C., María Antonieta; Valenzuela, Eduardo; Parra, Patricio; Gutiérrez, Mónica; Torelli Silva, Luis.
Título: Cerrena unicolor (Bull.) Murr.(Basidiomycota) aislado de micangio de Tremex fuscicornis Fabr. (Hymenoptero Siricidae) asociado a decaimiento y pudrición del Alamo (Populus sp.) en Chile / Cerrena unicolor(Bull.)Murr.(Basidiomycota) isolated from mycangia of Tremex fuscicornis Fabr. (Hymenoptera Siricidae) associated to poplar decline (Populus sp.) in Chile)
Fonte: Bol. micol;20:57-61, dic. 2005. ilus.
Idioma: es.
Resumo: Entre septiembre a diciembre del 2004 el Instituto Forestal y el Servicio Agrícola y Ganadero, en investigaciones conjuntas de estrategias de control biológico para Tremex fuscicornis Fabr. (Hym. Siricidae), se profundizó en el conocimiento de la asociación simbiótica que presenta esta avispa xilófaga con un hongo. T. fuscicornis, es una avispa taladradora del álamo que presenta en sus glándulas micangiales el micelio y esporas de un hongo asociado, el cual inyectado al árbol en el momento de la oviposición, causa su posterior decaimiento y biodegradación. Desde hembras adultas se obtuvieron los micangios que contenían micelio y artrosporas del hongo, estos fueron macerados y posteriormente sembrados en agar papa dextrosa, desarrollándose colonias fúngicas que formaron artrosporas. El micelio de estas colonias fue inoculado en varios tipos de sustratos vegetales esterillizados, en especial en trozas de álamo, donde se desarrollaron basidiocarpos, los que taxonómicamente correspondieron a Cerrena unicolor (Bull.) Murr., primer reporte para Chile de este basidiomicete.

Since september to december 2004,Instituto Forestal and Servicio Agrícola y Ganadero, while investigating together the strategies for the biological control of Tremex fuscicornis Fabr. (Hym.Siricidae), acquired thorough knowledge about the symbiotic association existing between this xylophagus wasp with a fungus. T. fuscicornis is a horntail wasp attacking poplar trees and which has in its mycangial glands the mycelium and spores of an associated fungus that once injected in the tree at the oviposition stage, causes its further decayand rottenness. Mycangia containing mycelium and arthrospores of this fungi were obtained from adult females. They were macerated and then cultivated inpotato dextrose agar (PDA) what resulted in fungal colonies that further formed arthrospores. The myceliumof these colonies was inoculated into different kinds of sterilized vegetal substrates, mainly in pieces of poplartrees, where basidiocarpes were developed, taxonomically corresponding to Cerrena unicolor (Bull.) Murr., thisbeing the first report on this basidiomycete in Chile.
Descritores: Fungos/isolamento & purificação
Fungos/classificação
Insetos Vetores
Insetos
Populus/microbiologia
-Chile
Responsável: CL2.1 - Biblioteca de Medicina



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