Mushrooms have been in the refrigerator for a week. In this case, it is necessary to check whether the mushrooms have gone bad. If they have not, there should be no problem. But for the sake of safety, it's better not to eat mushrooms. Mushrooms you usually buy must be eaten in time, and they will go bad after a long time.

Pleurotus ostreatus (also known as Pleurotus ostreatus, Pleurotus ostreatus, Pleurotus ostreatus and Taiwan Province Pleurotus ostreatus) is a kind of Pleurotus ostreatus, a very common gray edible mushroom.

The bud tube of Pleurotus ostreatus keeps branching and elongating, forming mononuclear hyphae. Mononuclear hyphae with different sexes combine (mate) to form binuclear hyphae. Binuclear hyphae have locked associations on the septum. With the help of lock-like association, binuclear hyphae continue to divide and branch, and grow and reproduce indefinitely under suitable conditions.

In the seed layer, the top of binuclear hyphae produces basidiospores, and its genetic material is recombined and separated to form four basidiospores. When the spores mature, they eject from the folds and complete a life cycle. Because there are many kinds of Pleurotus ostreatus cultivation, as a producer, we should be able to simply distinguish the common kinds from the appearance to avoid the wrong production and sales. Therefore, this paper also briefly introduces the morphological characteristics of several common cultivated species of Pleurotus ostreatus from the appearance.