We only open them for a short period of time with mushroom sprouts or mycelium. Sterile Petri dishes should not be opened after filling and covering with the lid (same as with jar bottles). What we need to worry about are bacteria and molds. Mushrooms are not demanding, many species grow on even sublime substrates, so we do not have to worry too much about their nutrition. Petri dishes are sterilized by boiling, and filled at 100 ° C with agar broth (also heated to 100 ° C), cover with lid and allow to solidify in the refrigerator. These ingredients, which are commonly available, are dissolved together with agar in hot water on agar broth.
Because agar itself does not provide nutrition, we need to enrich the agar with a nutritious ingredient, such as barley malt and yeast extract, to which soy protein can be added. Agar can be purchased as a cookie ingredient. To grow mushrooms, first we need to prepare an agar broth. When growing mycelium, as with fruit harvesting, we must take care of purity and sterilization - otherwise we will grow microbial colonies instead of fungus on agar. The procedure for growing mycelium in domestic conditions Microbiological laboratory practice is an advantage, but not a necessity - experience with fruit making is enough. We need Petri dishes from lab equipment (a sterilization autoclave is an advantage, not a necessity). Growing mycelium on agar in Petri dishes is easier than it seems. The only reason why word primordium is used is to emphasize the similarity of mushroom biomass and traditional fertility. Practically, the fungal biomass is immediately processed into the extract and packaged as capsules or tablets. From that time the theorists would grow up in time. Primordium is a germ fungus in the form of bumps on the surface of the culture medium (agar).
When inoculated on a culture vessel (eg a petri dish), the mycelium swells rapidly through the culture medium (agar) and after about 7 days forms on its surface the bones called primordium - the germ. When growing the biomass of medicinal fungi in vitro (ie artificially), mycelium grows much faster than the fetus. Not everyone knows that this forest grows through forest soil (or wood-borne fungi, attacked wood) at distances of many meters, and that its total weight is usually much larger than the total weight of the fruit-trees. Every mushroom must have seen the mallow - when harvesting the fruit in the forest, it is seen as a tangle of white fibers called hyphae, from which the fruit grows.
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