Identification of Edible Fungi
Identification of Edible Fungi
The hyphae of Pleurotus ostreatus are white, dense, stout, cotton-wool-like, and those with wall-climbing phenomenon are excellent strains. If the bacteria cultured with sawdust, the decomposed sawdust is light yellow, and a small amount of primordia appear, which is an excellent strain. If the mycelium is sparse or bundled, the cotton shell culture medium is dark red, the sawdust culture medium is white, the hyphae breaks away from the bottle wall and shrinks, there is yellow liquid accumulation at the base of the bottle, or mildew spots appear on the surface of the culture material, it is inferior bacteria.
The mycelium of Auricularia auricula is white and neat, and it is an excellent strain. If the mycelium is sparse, the culture material particles can be seen, the primordium appears before the mycelium is full, and the yellowish liquid accumulates at the base of the bottle, which is an inferior strain.
The mycelium of Flammulina velutipes was white, stout, or fine powder in appearance and grew well. In the later stage, it was cluster-shaped and fruiting body appeared on the culture material, which was an excellent strain. The hyphae can not grow downwards, and those who spit yellow water are inferior bacteria.
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Quick freezing and Refrigeration of Edible Fungi
Quick-frozen storage of Lentinus edodes: the production of Lentinus edodes has developed vigorously in the north and south of China in recent years. Since the popularity of bag-planted Lentinus edodes in Fujian, Zhejiang, Henan, Hubei and other provinces have successfully developed bag-planted Lentinus edodes. Quick-frozen storage of Lentinus edodes has become an indispensable and important fresh-keeping technology in production and sales. The quick-frozen storage of Lentinus edodes is more simple and convenient than that of mushrooms. Generally, fresh mushrooms are pre-cooled in ice water, removed and drained, quickly frozen in an ultra-low humidity freezer of 60 ℃, and then stored in a 24 ℃ freezer of-18 ℃.
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Preservation of Mother species of Edible Fungi
The mycelium of edible fungi propagates quickly and is easy to mutate, so it is difficult to preserve the strains. This paper introduces four effective and simple methods. 1. Liquid paraffin preservation method: after high-pressure sterilization of liquid paraffin, put it in a thermostat for several hours or in a dryer for several days, absorb liquid paraffin with a sterile straw or syringe and inject it into the strain test tube. The injection amount should be about 1 cm higher than the tip of the inclined plane. Plug with cotton stopper, seal with wax, store upright in low temperature, can be preserved for 5 years. 2. weigh a certain amount of wheat bran by preservation method, add water or nutrient solution and mix well.
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