What is the order of the number of microorganisms in the three major groups in the soil? 1 Bacteria

There are more bacteria than actinomycetes than fungi.

Actinomycete Swimming actinomyceteActinomyceteactinomycete, a radioactive actinomycete, is named after the actinomycete of the colony. It is a group of prokaryotes that is widely distributed in nature and reproduces mainly with spores.

Actinomycetes are closely related to human production and life, and about 70% of the antibiotics currently widely used are produced by various actinomycetes. Some species of actinomycetes also produce various enzymes (proteases, amylases, and cellulases, etc.), vitamins (B12), and organic acids. Frankia is an endosymbiotic bacterium with nitrogen-fixing ability in the root nodules of non-leguminous woody plants.

In addition, actinomycetes can also be used for steroid transformation, hydrocarbon fermentation, petroleum dewaxing, and sewage treatment. A small number of actinomycetes can also pose a hazard to humans, causing human and animal and plant diseases. Therefore, actinomycetes are closely related to humans and have important significance in the pharmaceutical industry.

Actinomycetes are widely distributed in nature, mainly in the form of spores or hyphae in soil, air and water, especially in low water content, rich in organic matter, neutral or slightly alkaline soil. Actinomycetes are only a morphological classification, not a term for biological classification. Some bacteria and fungi can be classified as actinomycetes.

The earthy smell peculiar to the soil is mainly caused by the metabolites of actinomycetes. Taxonomic status of actinomycetes in microorganisms Actinomycetes differentiate morphologically into hyphae and spores and are similar to fungi in culture characteristics. However, the results of modern molecular biology have shown that actinomycetes belong to a class of bacteria with branched mycelium and are positive for Gram stain.

The main basis is: the same prokaryotic microorganisms: the nucleus has no nuclear membrane, nucleolus and true chromosomes; Lack of organelles such as mitochondria and endoplasmic reticulum in the cytoplasm; Ribosomes for 70s; The cell structure and chemical composition are similar:

The cells have a cell wall, the main components are peptidoglycan, and contain DPA; The diameter of actinomycete hyphae is basically the same as that of bacteria; The pH range of the optimal growth is basically the same as that of bacteria, and it is generally slightly alkaline; are susceptible to lysozyme and antibiotics, but not to antifungal drugs; The mode of reproduction is asexual reproduction, and the genetic characteristics are similar to those of bacteria.

Soil is the base camp of microorganisms and the richest reservoir of bacteria for human beings. In particular, bacteria are the most abundant in the soil, accounting for about 70-90% of the total number of soil microorganismsDifferent types of bacteria in the soil have different roles.

Some are able to fix nitrogen in the air and synthesize proteins in cells; Some are able to decompose the straw of crops, and most of them are heterotrophic bacteria. In addition to bacteria, other microorganisms in the soil are actinomycetes (the main producers of antibiotics) and fungi, while algae and protozoa are less abundant. Soil microorganisms are important factors in soil fertility.

Soil is composed of a variety of granular minerals, organic matter, moisture, air and a large number of microorganisms, is a paradise for microorganisms to survive, there are hundreds of millions of microorganisms in one gram of soil, even in the desert desert, there are more than 100,000 microorganisms in one gram of sand. They are generally hidden at a depth of 10 cm or 20 cm in the soil. The deeper the soil layer, the lower the number of microorganisms; However, the most superficial layer of the soil has less water due to sunlight, so the number of living microorganisms is also small.

The most abundant in the soil are bacteria, followed by actinomycetes and fungi.

Fungi exist in a large and diverse variety of species. The role of only a few of these fungi is understood, and the rest is almost unclear.

Actinomycetes. It has the ability to decompose organic matter such as mold. Most of them belong to the bacteria that produce anti-biomass, and have the effect of inhibiting pathogenic bacteria.

Filamentous fungi.

That is, there are more than 100,000 types of mold. A very small number of filamentous fungi are known to be pathogenic bacteria that cause disease in vegetables.

Algae In addition to water, there are many species of algae that are also present in the soil. Some algae absorb nitrogen from the air.

Earthworms can eat humus-containing soil and excrete it, and are the helpers of cultivating soil to promote soil agglomeration.

Ticks and mites are soil animals smaller than 1 mm. The soil is home to many predatory and parasitic ticks.

Protozoa are single-celled protozoa that move to prey on and decompose organic matter, and are partners of paramecium, euglena algae, etc.

Nematodes are tiny soil animals smaller than a few millimeters. There are many species, and only a small part of them are parasitic on the roots of vegetables.

The small herbivorous soil animal of the beetle mite is also the most abundant soil animal in the soil. Survive by breaking down fallen leaves.

Jumping insects are soil animals smaller than a few millimeters, and decompose molds and algae for survival. Known as the "plankton of the earth", it plays an important role in the material cycle.

Summary. Hello, this sort is correct. Bacteria are the largest group of bacteria that can adapt to a variety of environments. Actinomycetes are the second largest group, while fungi are more demanding on the environment and are less abundant.

What is the order of the number of microorganisms in the three major groups in the soil? 1.Bacteria >> Actinomycetes >> fungi.

Hello, this sort is correct. Bacteria are the largest group of bacteria that can adapt to a variety of environments. Actinomycetes are the second largest group, while fungi are more demanding on the environment and are less abundant.

Excuse me, what is their normal value?

Hello, bacteria in the soil can account for 70% 90% of the amount of microorganisms in the soil, while actinomycetes in 1g of soil can be 10 to the 7th to the 8th of 10, accounting for 5% 30%, and the content of fungi in 1g of soil is 10 to the 4th to the 5th of 10.

In addition, there are microorganisms such as algae and protists, which are relatively small.

The largest number of microorganisms in the soil are bacteria.

The microorganisms that live in the soil are bacteria, actinomycetes, fungi, algae, protozoa, phagosomes, viruses, and nematodes.

Bacteria are the smallest single-celled prokaryotes (microns). However, despite their small size, they remain the most abundant microbial taxa in soils, often more abundant than other taxa, and may be equivalent to half of the microbial biomass in soils. The number of bacteria in each gram of soil can reach about 300 million, and the wet weight per acre can be as high as about 100 kilograms.

Actinomycetes have common characteristics of bacteria and fungi, and are called "ray-fungi" because of their close relationship with fungi. On agar plate media, colonies of actinomycetes are easily distinguished from eubacteria: unlike fast-growing mushy fungal colonies, actinomycete colonies appear slowly, in powder form, and stick firmly to the agar surface.

The number of fungi in the soil is second only to bacteria. They control all the soil and possess filamentous mycelium made up of individual hyphae. In most aerated or cultivated soils, fungi make up the main part of the total microbial biomass due to their large diameter and coarse mycelial web.

The number of fungi per gram of dry soil varies from 2,000 to 100,000.

Answer: Ki Xun case]: b

Hint The number of microorganisms in the soil is very large, but the number of different species varies greatly. Fight against this general bacteria, actinomycetes, fungi, algae and protozoa.

In the soil, the highest number of microorganisms is (), and the largest biomass is ().

Correct answer: Prokaryotic micro-rolling coarse organisms, eukaryotic Qizi microorganisms.

Quantity: Bacteria >> Actinomycetes >> Fungi Bacteria : Bacteria survive in a variety of environments and are the largest taxa; Actinomycetes: Actinomycetes are the second largest group in the soil, which makes the soil fragrant; Fungi: Fungi have strict environmental requirements.

Nutrients. 1. Water and inorganic salts.

2. Carbon source: any nutrients that can provide microorganisms with carbon elements needed for growth and reproduction.

Function: The role of carbon source on microbial growth and metabolism is mainly to provide the carbon frame of the cell, provide the energy required for the life activities of the cell, and provide the carbon frame of the synthetic product.

3. Nitrogen source: any nutrient that can provide essential nitrogen for microorganisms.

Purpose: Mainly used for the synthesis of proteins, nucleic acids and nitrogen-containing metabolites.

5. Growth factors: trace organic matter that is indispensable for the growth of microorganisms.

The order of quantity is: bacteria, actinomycetes, fungi.