MindMap Gallery 2-3 Structures other than cell wall
This is a mind map about structures other than 2-3 cell walls. Sugar is coated in a layer of transparent gelatinous material of varying thickness outside the cell walls of some bacteria.
Edited at 2023-11-02 15:29:49This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
Structures other than cell wall
sugar quilt
concept
A layer of transparent gelatinous substance of varying thickness that coats the cell walls of some bacteria
Classification
wrapped around a single cell
There is a fixed layer on the wall
Thick layers
(large) capsule
It has high viscosity and is relatively stably attached to the outside of the cell wall. It has a certain shape and is about 200nm thick.
Thin layers
microcapsule
The thickness is below 200nm, it binds closely to the cell surface and is easily digested by trypsin.
loose, not fastened to the wall
mucus layer
Looser than the capsule and has no obvious shape
wrapped around cell clusters
Bacteria jelly mass
Identify bacterial colonies
Smooth (S-type) colonies
Capsule produced, smooth and transparent surface
Rough type (R type) colony
No capsule, rough surface
The main function
1. Protective effect
2. Store nutrients
3. Serves as a permeability barrier and ion exchange system
4. Surface adhesion
5. Information recognition between bacteria
6. Accumulation of metabolic waste
flagellum
concept
long, wavy, protein appendages that grow on the surface of some bacteria
composition
matrix
concept
It is the part of the flagellum base buried in the cell wall and cell membrane.
the difference
Gram-negative bacteria have two pairs of rings (L ring, P ring and S ring) on the flagellum base. ring, M ring); G only has S ring and M ring.
hook sheath/flagellar hook
flagellar filament
Flagella are the motility organs of bacteria, and flagellum motility is tropism.
Flagellum insertion mode
Duan Sheng, Zhou Sheng, Lateral Sheng
Determine the presence or absence of flagella
1. Flagellar staining method
2. Semi-solid agar puncture culture
3. Observe movement status using hanging drop method and dark field observation method
4. Observe the colony shape (large, irregular, incomplete edges)
Fimbriae/fimbriae/cilia
It is a slender, hollow, short, straight and numerous protein appendage that grows on the surface of bacteria.
A filamentous structure that is thinner, shorter, and straighter than a flagellum
According to the function of pili
Ordinary pili
Increases the ability of bacteria to adsorb to other cells or objects
sex pili
It is formed under the control of plasmid (F factor), also known as F-pilus.
They are thicker and longer than ordinary pili and less in number. Each cell has only 1-4 pilus. It is an organ for bacteria to transmit free genes and serves as a channel for genetic material when bacteria mate.