Physiological basis of edible fungi

1.Nutritional substances

Fungi are a kind of heterogeneous eukaryotic organism without chlorophyll,

There are two phenomena in the growth and development of fungi: synthetic metabolism and catabolism

The characteristics of edible fungi absorbing nutrients:

① a large number of elements are absorbed and used in the form of compounds. The carbon nutrition of edible fungus is 

② by biodegradation, and the residue of plant is degraded after being used. Glucose is a widely used carbon source. The use of nitrogen nutrition is similar to carbon nutrition. After the animal and plant residues are decomposed by microorganisms, the metabolites produced in the middle can be used by edible fungi.

Nitrate is a widely used nitrogen source.

③ The vast majority of fungi are of aerobic nature.

The micro-nutrition of 

④ fungi (such as vitamins, auxin, hormones, etc.) is very important, mainly because trace elements are related to the activation of enzymes, and are crucial for metabolic pathways and biosynthesis.

Some secondary metabolites of 

⑤ fungi, such as lemon-acid and amino acid, have a chelating effect in the fungal cells, which can cushion the stability of ph value, thus making certain trace elements play an effective role.

In the growth of edible fungi often use lime or gypsum, both calcium metabolic function, can also adjust ph. 

2.Characteristics of growth and development and its environmental conditions

Life history of edible fungi in 

① The life history of edible fungi can be divided into two major aspects: vegetative growth and reproductive growth.

Spore----germination-------Mono-nucleus mycelium-------Dual-core mycelium-------three-time mycelium--------fruiting-------spores (analysis of intermediate process)

Effects of environmental conditions of 

② on the growth and development of action fungi Factors affecting edible fungi are: nutrients, ph, temperature, moisture, oxygen and carbon dioxide, light and biological factors.