ABSTRACT
Mushrooms of the genera Pleurotus develop in different substrates or compounds based on celullosic or lignified residues. As crop yield depends on the formulation of the culture media, the present study was aimed at measuring and evaluating the in-vitro mycelium growth of P. ostreatoroseus in different culture media and its colonization of elephantgrass substrate supplemented with different brans. Experiment 1 consisted of the mushroom stains cultured in elephant-grass culture media supplemented with soy, wheat, rice and corn brans in the concentrations 0, 10 and 20%, distributed in Petri plates, inoculated with the strain POR01/03 of P. ostreatoroseus and incubated at 28° C. Mass and mycelium growth were evaluated. Experiment 2 involved the use of the previously moistened elephant-grass substrate, which received the same supplementation as that of experiment 1. This was packaged in test tubes, sterilized, inoculated with the same strain and then maintained under the same conditions of experiment 1. The elephantgrass culture media supplemented with 20% soy bran and 20% rice bran provided, respectively, larger development of the mass and mycelium growth, when compared with the other treatments. However, colonization took place the quickest on the elephant-grass substrate without addition of the soy, wheat, rice and corn brans.
KEY WORDS
Basidiomiceto; mycelium mass; supplementation; growth speed