Plant cells do not have large vacuoles and cannot undergo plasmo wall separation

First of all, a cell without vacuoles is an immature cell, it can absorb and lose water, otherwise how can the cell go through material exchange and growth?

However, the cell wall of the young cell is not yet mature, only the primary wall, which is tightly bound to the cell membrane, and the degree of contraction of the cell after the cell loses water is very close to the cell membrane, and there is no obvious separation of the plasma wall. But that doesn't mean it can't absorb and lose water.

Supplement: In the hypertonic environment of plant cells, the water in the vacuole exudes out of the plasma membrane, the protoplast shrinks, and part of the plasma membrane is separated from the cell wall. It refers to the condition that the water in the cell will penetrate into the cell under the condition of high concentration of external solution in mature plant cells, because the loss of water leads to the contraction of the protoplasmic layer and the contraction of the cell membrane, and the elasticity of the cell wall is less than that of the protoplasm layer, so the plasma wall separation is produced

This phenomenon of separation of the protoplasmic layer and the cell wall is called plasma wall separation.

Plasmo-wall separation can also occur.

When the concentration of the cell fluid of the plant cell is less than the concentration of the external solution, the cell will lose water through osmosis, and the water in the cell fluid will enter the solution through the protoplasmic layer, so that the cell wall and the protoplasm layer will shrink to a certain extent. Since the protoplasmic layer is more contractile than the cell wall, the protoplasmic layer separates from the cell wall when the cell is constantly losing water.

When there are vacuoles in plant cells, the changes of vacuoles in the plasma wall are more obvious and easy to observe. If there is no vacuole, it is the cytoplasm that loses water directly.

No. Some lower plants, such as unicellular algae (Chlamydomonas, Chlamydomonas, etc.), do not have vacuoles and do not have organelles with other membrane structures. Other plants have vacuoles. Vacuoles are organelles that are coated by biofilms.

Vacuoles are biofilm-coated organelles that are widely found in all plant and fungal cells, as well as some protists, animals, and bacterial cells. This enclosed compartment is filled with an aqueous solution containing a variety of inorganic and organic molecules, including many enzymes in a dissolved state and, in some cases, encapsulated solid particles.

The function of vacuole is multifaceted, and it plays a clear role in maintaining the tone of the cell.

To sum up, the functions of vacuoles are roughly as follows:

1. Separate substances that may be harmful or threatening to cells;

2. Contains metabolic wastes;

3. Store water in plant cells;

4. Maintain cell osmotic pressure and maintain the form of cell filling;

5. Maintain the acidic environment inside;

6. Contains various small molecules;

7. Discharge all kinds of substances that are not needed by cells;

8. Use the pressure of vacuoles to support the shape of plant leaves or flowers;

9. Through the increase of volume, the plant grows rapidly;

10. In plant seeds, important proteins associated with germination are stored in "protein bodies", which are also in the form of vacuoles.

When the concentration of the plant extracellular solution is greater than the concentration of the plant intracellular solution, the phenomenon of plasma wall separation occurs in the plant cell.

The reason for this phenomenon is actually very simple, and it is not worth mentioning to mention. That is related to the absorption and loss of water by cells.

In the case of a plant cell, the outermost part is the cell wall, the inner part is the cell membrane, and the inner part is the cytoplasm, in addition to the nucleus.

The cell wall of the plant is fully permeable, any substance can pass through, and the elasticity is relatively smallHowever, the cell membrane is a selectively permeable membrane, that is, a semi-permeable membrane, which can only allow the passage of the manuscript imitation car-like substance, and the elasticity is greater than that of the cell wall.

Therefore, when we put the rotten plant cells in a high-concentration sucrose solution, due to the large concentration of the external solution, the water in the cells will seep out, causing the protoplasmic layer to shrink and separate from the cell wall, which is the so-called plasma wall separation.

Summary. When well-developed vacuole plant cells are immersed in a hypertonic solution, the protoplasm shrinks and separates from the cell wall, a phenomenon called plasmo-wall separation.

Why can't plasmo-wall separation occur without vacuoles? The cell membrane is also a semi-permeable membrane, and the membrane is elastic

One of the conditions for plasmo-wall separation is the presence of large vacuoles.

Plasmo-wall separation cannot occur without vacuoles.

Why do you have to have large vacuoles? Because the vacuole is particularly large, the cytoplasm is squeezed very close to the cell membrane, (cytoplasmic cell membrane and vacuolar membrane) is equivalent to a semi-permeable membrane of the muffled layer, because the membrane has fluidity, it is elastic. Plasma wall separation occurs from the cell wall.

However, the cell membrane is very elastic, and in the absence of vacuoles, the cell membrane is also a semi-permeable membrane! Why can't the cell membrane have a plasma-wall separation chain with the cell wall, and the cell membrane can also be separated from the plasma wall due to elasticity, right? Why can't it be messed up?

When well-developed vacuole plant cells are immersed in a hypertonic solution, the protoplasm shrinks and separates from the cell wall, a phenomenon called plasmo-wall separation.

Plant cells do not have vacuoles.

Plant cells lose very little water.

Plasma-wall separation is not possible.

Water in plant cells is mainly found in vacuoles.

Leukocyte phagocytic viruses are endocytosis.

Energy** is the respiration of the cells.

Oxygen pH and temperature can affect cellular respiration.

How does transmembrane transport and endocytosis of substances reflect the fluidity of biofilms?

Transmembrane transport does not reflect fluidity.

Exocytosis is manifested by protein carriers on the biomembrane.

Vacuoles: in each plant cell.

The size, shape, and number of vacuoles vary greatly, and even the color within them varies. In mature cells, there is usually only one large vacuole rubber, which can reach up to 90% of the cell volume. Vacuoles have the following functions:

Storage functionThe role of maintaining cell turgor pressure, with lysosomes.

Similar function, defensive role.

Cell wall. The plant cell wall is a thick layer of walls that is present on the periphery of plant cells, which is different from animal cells.

One of the main features. It is composed of three parts: the intercellular layer, the primary wall, and the secondary wall. The main components are polysaccharide substances.

The cell wall percolates haveMaintain a certain morphology of the cell, enhance the mechanical strength of cells, participate in the physiological activities of cells and other functions.

Therefore,The cell wall and vacuoles of mature plant cells are conducive to the maintenance of a certain morphology of the cells.

1.It is the cell wall, 2It is the cell membrane that swims violently, 3It is chloroplast, 4It is the nucleus, 5It is vacuole, 6, cytoplasm.

1) Figure A has a cell wall, chloroplasts and vacuoles, which are unique to plant cells, and animal cells do not have cell walls, leaf branch pin greens and vacuoles, so Figure A is a plant cell pattern diagram, and Figure B is an animal cell pattern diagram.

2) Jiatubsan is a plant cell pattern diagram because it has 1Cell wall, 3It's chloroplast, 5

Vacuole. 1.The cell wall, which can protect the internal structure of the cell and maintain the normal morphological function of the cell, 3

Chloroplasts are the sites where photosynthesis takes place, and mature plant cells have 5Vacuoles, the cell sap within the vacuole dissolves a variety of plants.

I don't understand why there are vacuoles in plant cells. And what it does The vacuole you call is actually the English vacuole

Here's what it does. (1) During the growth of plant cells.

The vacuum causes the cell to grow because it is elongation and enlargement.

Vacuole absorbs water.

This allows the cells to grow in size quickly.

And in the process of getting bigger.

Plants only have a primary cell wall

There is no secondary wall

So in the process of getting bigger.

The microfibril in the cell wall will be broken.

And Pectin will slide over each other

When this process is complete.

The secondary cell wall was established.

The plant cells can no longer grow. (2) For excretion purposes.

Go dissolve some metabolic wastes

And then use the method of falling leaves to remove these metabolic wastes. (3) Sometimes the vacuole will have a color.

It is used to attract insects such as bees to spread pollen. Hope you understand.

function:it provides support to the plant.I bio ge model werI remember Miss saying that the inside of the vacuole was full of water.

Therefore the dplant can first stand up.

Reference: Yourself.

function of vacuole is to store water and souluble nutrients

Reference: Bio Textbook

Follow-up: Without vacuolar membrane, it is not a protoplasmic layer? Is it so difficult that a person is not a person without hands?

This is not a good analogy, no hand can be a person, no vacuole can be a cell, but without a vacuole membrane, there is no concept of protoplasmic layer, and there is no phenomenon of plasma wall separation. It will have other physiological phenomena, and it can still absorb and lose water, because there are many substances in the cytoplasm, and it will also form a concentration difference with the outside world.

Follow-up question: Can absorb water and lose water, can the plasmo-wall separation occur?

No, if there is no vacuole in a plant cell, there is no structure of the protoplasmic layer, so there is no plasma wall separation. There are no vacuoles, and water absorption is done by absorption. Animal cells do not have vacuoles, and after absorbing water, the cells swell or even burst, and the cell shrinkage will occur when water is lost, and there is no such phenomenon as plasma wall separation.

Follow-up: What if you add a cell wall to an animal cell (just hypothetical)?

You are much more studious than my students. Given to the cell wall of the animal, the conditions exist, and this phenomenon should be present. In the past few days, the school has to hold mid-term exams, and there is little Internet access, so I didn't give you a reply in time, hehe.

Follow-up question: In other words, even if the plant cell does not have vacuoles, as long as there is enough concentration difference and there is enough water in the cell, it can still produce plasmo-wall separation?

No. Two conditions must be met for the separation of the plasma wall to occur, 1) there must be a protoplasmic layer and a cell wall structure, and 2) there must be a difference in concentration between the inside and outside.