2.2. Preparation and conservation of the mushroom spawn
The mycelium culture was maintained in glass tubes with MYPA (20 g malt extract, 2 g yeast extract, 1 g peptone and 20 g agar, per liter) medium and covered with sterile liquid vaseline! at room temperature until use. A nutrient medium (CDYA) was prepared using the filtrate resulting from boiling 500 g of Phase II SSH based compost in 1 L of water and adding 2 g yeast extract, 20 g glucose and 20 g agar, per liter (González Matute, 2009). The medium was adjusted to pH 6.5 with HCl and sterilized at 1 atm for 30 min. A. blazei mycelium was inoculated on Petri dishes containing the nutrient medium and incubated in darkness at 25 C for 10e15 days, at which time mycelium cultures were ready to be used to prepare spawn.
2.2. Preparation and conservation of the mushroom spawnThe mycelium culture was maintained in glass tubes with MYPA (20 g malt extract, 2 g yeast extract, 1 g peptone and 20 g agar, per liter) medium and covered with sterile liquid vaseline! at room temperature until use. A nutrient medium (CDYA) was prepared using the filtrate resulting from boiling 500 g of Phase II SSH based compost in 1 L of water and adding 2 g yeast extract, 20 g glucose and 20 g agar, per liter (González Matute, 2009). The medium was adjusted to pH 6.5 with HCl and sterilized at 1 atm for 30 min. A. blazei mycelium was inoculated on Petri dishes containing the nutrient medium and incubated in darkness at 25 C for 10e15 days, at which time mycelium cultures were ready to be used to prepare spawn.
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