23 research outputs found
Leucocoprinus fluminensis (Agaricaceae, Basidiomycota), uma nova espécie para a Mata Atlùntica do sudeste brasileiro
Leucocoprinus fluminensis sp. nov. was collected on an Agaricales (Basidiomycota, Basidiomycetes) survey expedition, made in patches of Rain Forest at the Biological Reserve of TinguĂĄ, surroundings of Nova IguaçĂș, Rio de Janeiro state, Brazil, and described as a new species. A usual methodology for collection and identification of Agaricales mushrooms was applied. The new species is characterized by reddish-brown center pileus and weakly dextrinoid spores in Melzerâs reaction.Key words: Agaricaceae, Atlantic Rain Forest, Rio de Janeiro.EspĂ©cimes de Leucocoprinus fluminensis sp. nov foram coletados em uma expedição de pesquisa de fungos Agaricales (Basidiomycota, Basidiomycetes), realizada em fragmentos de floresta tropical na Reserva BiolĂłgica do TinguĂĄ, situada nos arredores de Nova Iguaçu, Estado do Rio de Janeiro, Brasil, sendo descritos como uma nova espĂ©cie. A metodologia usual para coleta e identificação de cogumelos Agaricales foi aplicado. A nova espĂ©cie Ă© caracterizada por apresentar o centro do pĂleo marrom-avermelhado e esporos fracamente dextrinĂłides em reação de Melzer.Palavras-chave: Agaricaceae, Mata AtlĂąntica, Rio de Janeir
FUNGOS DA RESERVA BIOLĂGICA DO TINGUĂ, RIO DE JANEIRO, BRASIL: ESPĂCIES DAS FAMĂLIAS ENTOLOMATACEAE, PHYSALACRIACEAE, PLUTEACEAE, STROPHARIACEAE E TRICHOLOMATACEAE
A Potencial use of edible mushrooms Pleurotus ostreatoroseus Singer (Pleurotaceae) and Lentinus sajor-caju (Fr.) Fr. (Polyporaceae) in metal remediation processes.
Increased heavy metal pollution generated through anthropogenic activities into the environment required the need for environmental recovery strategies, such as mycoremediation. The aim of the present study was to assess the effect of iron (Fe) in the mycelial growth of Pleurotus ostreatoroseus Singer and Lentinus sajor-caju (Fr.) Fr. The growth response was evaluated on Potato Dextrose Agar medium with varying concentrations (0 ppm, 10 ppm, 20 ppm, 40 ppm and 80 ppm) of the iron metal. Ferrous sulfate heptahydrate (FeSO4.7H2O) were evaluated in this study. The daily mycelia growths were measured and compared. The biomass production was determined using the same plates of the evaluation of the growth of mycelia. Results revealed that the growth of mycelia of P. ostreatoroseus occurs slowly in medium containing different iron concentrations, but in relationship to L. sajor-caju was able to produce the largest mycelial dry mass. Overall this study suggests that P. ostreatosroseus can be used as promising option for removal of iron metal in bioremediation strategies
Determinação dos efeitos de dois suplementos alimentares em Drosophila melanogaster
Pleurotus spp. are considered extremely rich mushroom species from the nutritional pointof view, providing immune-enhancement effects when consumed. However, few mushroomshave been tested for their phenotypic and genotypic responses in animal modelsto ensure the proper dosage for their use. This study aimed to evaluate the effects of twomushroom species on the reproductive capacity of Drosophila melanogaster. Pleurotuscitrinopileatus Singer and Lentinus sajor-caju (Fr.) Fr. were provided separately, in specificconcentrations, as feed supplements to the fruit flies. The total numbers of developedlarvae, pupae, and adults were then measured for each treatment. Inter simple sequencerepeats marker analysis was carried out to infer genotypic changes in the mushroom-fedflies. Our results suggest that Pleurotus spp. can cause positive changes to the fliesâ reproductivecapacity, since Pleurotus citrinopileatus in particular accelerated the life cycle andrevealed a higher genetic dissimilarity of the diet-supplemented flies.Keywords: fruitflies, reproductive fitness, edible mushrooms.Pleurotus spp. sĂŁo consideradas espĂ©cies de cogumelo extremamente ricas do ponto de vista nutricional, proporcionando reforço imunolĂłgico quando consumidas. No entanto, poucos cogumelos foram testados quanto Ă sua interferĂȘncia fenotĂpica e genotĂpica em modelos animais para garantir a dosagem adequada para seu uso. Este estudo teve como objetivo avaliar os efeitos de duas espĂ©cies de cogumelos sobre a capacidade reprodutiva de Drosophila melanogaster. Pleurotus citrinopileatus Singer e Lentinus sajor-caju (Fr.) Fr. foram fornecidos separadamente, em concentraçÔes especĂficas, como suplementos alimentares Ă s moscas da fruta. O nĂșmero total de larvas, pupas e adultos desenvolvidos foram entĂŁo avaliados para cada tratamento. AnĂĄlises de marcadores moleculares do tipo Inter simple sequence repeats foram realizadas para inferir mudanças genotĂpicas nas moscas alimentadas com os cogumelos. Nossos resultados sugerem que Pleurotus spp. podem causar mudanças positivas na capacidade reprodutiva das moscas, uma vez que Pleurotus citrinopileatus, em particular, acelerou o ciclo de vida e revelou uma maior dissimilaridade genĂ©tica das moscas suplementadas com esse fungo em sua dieta.Palavras-chave: moscas das frutas, estĂmulo reprodutivo, cogumelos comestĂveis