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    Home > Biochemistry News > Biotechnology News > The morphological characteristics of line bacteria and their position in microbiology.

    The morphological characteristics of line bacteria and their position in microbiology.

    • Last Update: 2020-08-23
    • Source: Internet
    • Author: User
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    The classification status of line bacteria in microorganisms is differentiated into mycelium and spores in morphology, similar to fungi in culture characteristics.
    however, the results of modern molecular biology show that the line bacteria belong to a class of bacteria with branched mycelium, and Erlan dyeing is positive.
    is mainly based on: (1) congenital nuclear microorganisms: cell nuclear-free membranes, kernels and real chromosomes; It also contains DPA; the diameter of the sterile bacteria is basically the same as the diameter of the bacteria; (3) the range of the most suitable growth PH is basically the same as that of bacteria, generally slightly alkaline; (4) they are sensitive to lysoylase and antibiotics, and the anti-fungal drugs are insensitive; and (5) the reproductive mode is asemic reproduction, with similar genetic characteristics to bacteria.
    and structure of the line bacteria have many kinds, most of the line bacteria have a well-developed branch-like filament body, a few are rod-shaped or original silk-like simple form.
    are mostly membrane-free, and their weight is similar to that of rod-like bacteria, with a diameter of about 1 micron.
    nucleoblasts in cells without real nuclei, cell walls contain cytowallic acids and dyrobidrates, but do not contain a few butyls and cellulose.
    the most closely related to human beings, the most widely distributed, the most variety, the most typical form of streptomycosis genus as an example.
    streptococcal is mainly composed of mycelium and spore structure.
    mycelium can be divided into three kinds of mycelium, gas mycelium and spore filament, depending on the living part, shape and function of mycelium. spores of
    -based mycelium streptomyces fall on the surface of the appropriate solid substrate, absorbing moisture under suitable conditions, swelling of spores, germination of germination, and further extending to the surface and interior of the substrate to form a base Endocyst, also known as primary mycelium or nutrient mycelium, is between 0.2 and 0.8 microns in diameter and is light in color, and its main function is to absorb nutrients and excrete metabolites.
    can produce water-soluble pigments and lipid-soluble pigments such as yellow, blue, red, green, brown and purple, which have important reference value in the classification and identification of line bacteria.
    Most species of E. coli have no diaphragm, do not break, such as streptomycosis genus and small monosporidium genus, but there is a class of line bacteria, such as Noka's type of line bacteria, the base of mycelium growth after a certain period of time to form a transverse membrane, and then break into a spore or rod-like small body.
    mycelium is a mycelium that grows outside the media and extends into space, also known as secondary mycelium.
    When observed under a microscope, the general aerosols are darker in color, thicker than the base mycelium, with a diameter of 1.0 to 1.4 microns, with a wide difference in length, straight or curved shape, which produces pigments, mostly lipid-soluble pigments.
    spore hypha is when the gas-producing mycelium develops to a certain extent, the top of which differentiats out of the spore-forming mycelium, called spore silk, also known as reproductive mycelium.
    the spores mature, they can escape from the spores.
    the form of the spores and how they are arranged on the gas-producing mycelium, which varies from strain to strain, is an important basis for the identification of streptococcus strains.
    the shape of spores have straight, wave, hook, spiral, spiral spores are more common, its spiral tightness, size, number of screws and spiral direction varies from strain to strain.
    the way of life of spore filaments is to live, intersempor, clump and rotation (first- and second-degree rotation) and so on.
    spores (spore) spores develop to a certain stage and differentiate into spores.
    Under the optical microscope, spores are round, oval, rod-like, cylindrical, melon-like, shuttle-like and half-moon-like, even if the spores formed by the same spore filament differentiation are not exactly the same, and therefore can not be used as a classification, firm basis.
    spores are very rich in color.
    Spore surface decoration varies from species to species, is clearly visible under the electron microscope, some smooth, some folds, warts, stings, hairs or scales, thorns and thick, size, length and dredging, generally more stable, is an important basis for the classification of bacteria, identification.
    Spores are formed in two ways: (1) the cell membrane subsidence, and gradually contract from the outside to the inside, and finally form a complete transverse membrane, the spores are separated into many asysent spores;
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