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Fungi (scientific name: fungi) are eukaryotes with eukaryotic cells, no spores and no chloroplasts. Including mold, yeast, mushrooms and other well-known mushrooms. More than120,000 kinds of fungi have been found.

Definition:

1, fungi have eukaryotes;

2. heterotrophs, which has no chlorophyll, takes absorption as its nutritional mode; ?

3. Generally, spores can be produced by asexual reproduction and sexual reproduction to continue the population;

4. Its typical vegetative body is filiform branching structure;

5. The main component of cell wall is chitin or cellulose or both. ?

Fungi usually grow on organic substances, such as soil, wood, food, dead plants and animal tissues. They reproduce and survive by absorbing nutrients. The nutritional patterns of fungi can be divided into the following categories:

1, absorb nutrition

The cell wall of protozoa is composed of chitin and cellulose, which enables them to absorb organic molecules, such as carbohydrates, fats, protein and other basic nutrients, so as to grow and reproduce. Some fungi also secrete enzymes in the process of absorbing nutrients, breaking down complex biomolecules into simpler parts for easy absorption.

2, * * * effect

Many fungi get nutrition by living. For example, rhizosphere fungi in soil can form a symbiotic relationship with the roots of plants. They provide plants with organic matter and water, while plants provide nutrients and carbohydrates needed by fungi. This biological relationship promotes the growth and reproduction of plants and fungi.

3, parasitism

Some fungi get nutrition by parasitizing other organisms. For example, ascomycetes can live in animals and plants and absorb nutrients from them. Plant pathogenic fungi can also parasitize plants, cause diseases and obtain nutrients from them.

4. Nutrition of mushroom fungi

Compared with other fungi, mushroom fungi have a unique way of nutrition. During their growth, they secrete enzymes to decompose organic matter, and then absorb nutrients through mycorrhiza.

When there are few nutrients in the environment, mushroom fungi will form mycelium with a thickness of more than 1 mm, and form spherical vegetative bodies through cell contribution, thus better absorbing nutrients.

5. Nutrition of thermophilic bacteria

Heat-clearing bacteria can survive in natural or industrial rot piles in high temperature environment. Its nutritional way is similar to that of ordinary fungi, which is to absorb nutrition. The special requirements of thermophilic bacteria in high temperature environment require them to produce different metabolites in order to survive in high temperature environment.