What are the factors that affect the opening and closing of the stomata and what is the regulation o

The main factors influencing stomatal movement.

1 .Stomatal movement caused by light The chloroplasts that defend the cell carry out photosynthesis under light, using CO2, which increases the pH value in the cell.

Powder phosphorylase hydrolyzes starch into glucose phosphate, and the intracellular water potential decreases, and the guard cells absorb water and expand, and the stomata open; The CO2 produced by respiration in the dark causes the pH value of the guard cells to decrease, and the starch phosphorylase synthesizes glucose into starch, the concentration of cell fluid decreases, the water potential increases, the guard cells lose water, and the stomata close. The osmotic system of guard cells can also be regulated by k. Photosynthesis is produced by photoreaction (cyclic and acyclic photosynthetic phosphorylation).

Generate ATP, absorb K through active transport against the ion concentration difference, reduce the water potential of guard cells, and absorb water to open the stomata. Note: If the light intensity is below the light compensation point, the stomata are closed; Red light and blue-violet light have the best effect on the light quality that causes the stomata to open; Sedum plants open their stomata at night to absorb and store CO2 (forming malic acid and storing it in vacuoles), and when the sedum closes, malic acid is decomposed into pyruvate to release CO2 for photosynthesis.

2 .Carbon dioxide affects stomatal movement Low concentrations of CO2 promote stomatal opening, while high concentrations of CO2 cause the stomata to close rapidly, regardless of light or darkness. The inhibition mechanism may be that the pH of the guard cells decreases, the water potential rises, and the guard cells lose water, and the stomata open rapidly only after the CO2 is gradually depleted after a period of light exposure.

3 .Temperature affects stomatal movement The stomatal opening degree generally increases with the rise of temperature, reaching the maximum at about 30, and the stomata can not be opened well at low temperature (such as below 10) despite long-term light, mainly because the activity of starch phosphorylase is not high, and the temperature is too high will lead to too strong transpiration, and the stomata will be closed due to the loss of water in the guard cells.

4 .If the transpiration is too strong during the day, the guard cells lose water and the stomata are closed, and on rainy days, the leaves are saturated with water absorption, and the epidermal cells have high water content, squeezing the guard cells, so the stomata are also closed during the daytime.

Temperature, moisture, sunlight intensity.

temperature, humidity, carbon dioxide concentration.

Temperature, moisture, light intensity and time.

The opening and closing of the stomata is controlled by guard cells on the leaf. Normal epidermal cells do not have chloroplasts, but there are chloroplasts in guard cells, which can use sunlight for weaker photosynthesis, plus other factors of guard cells, which regulate the expansion and contraction of guard cells, and can control the opening and closing of stomata.

There are also some paraguard cells on either side of the guard cell. Guard cells and surrounding cells, including the presence or absence of paraguard cells, the shape and number of paraguard cells, etc., can form various types, so they can be used as one of the bases for identifying plant species.

The opening and closing of the stomata is controlled by the guard cells.

Stomata, one of the many small openings in the epithelium of leaves, stems and other plant organs, are structures unique to the epidermis of plants. Stomata are usually found in the aerial parts of plants, especially on the leaf epidermis, and can also be seen on young stems and petals, but most submerged plants do not. In a narrow sense, the convex lens-like holes formed between guard cells are often called stomata.

Guard cells differ from epidermal cells in that they contain chloroplasts in their structure, but they are smaller in size and less numerous, and their lamellar structure is underdeveloped, but they can photosynthesize and synthesize carbohydrates. It is also sometimes accompanied by 2 to 4 paraguard fluid cells adjacent to the guard cells. The inclusion of these cells is a generalized stomata (or stomatal apparatus).

Immediately below the stomata there is a wide intercellular space (air cell).

Stomatal movement:

The chloroplasts of the guard cells carry out photosynthesis under light, and CO2 is used to increase the pH value in the cells, and the starch phosphorylase hydrolyzes starch into glucose phosphate, and the water potential in the cells decreases. The CO2 produced by respiration in the dark causes the pH value of the guard cells to decrease, and the starch phosphorylase synthesizes glucose into starch, the concentration of cell fluid decreases, the water potential increases, the guard cells lose water, and the stomata close. The osmotic system of guard cells can also be referred to as being regulated by k.

Photosynthetic light reactions (cyclic and acyclic photosynthetic phosphorylation) produce ATP, absorb K through active transport against the ion concentration difference, reduce the water potential of guard cells, and absorb water to open the stomata. Note: If the light intensity is below the light compensation point, the stomata are closed; Red light and blue-violet light have the best effect on the light quality that causes the stomata to open; Sedum plants open their stomata at night to absorb and store CO2 (forming malic acid and storing it in vacuoles), and when the sedum closes, malic acid is decomposed into pyruvate to release CO2 for photosynthesis.

Mr. Wang will explain this problem to you:

The opening and closing of the stomata are mainly regulated by guard cells.

The stomata are the small pores formed between the guard cells Known as the "gateway" for plant transpiration and water loss, and also the "window" for gas exchange The guard cell wall is thinner on the outside and thicker on the inside, and when the guard cells absorb water, the cells swell, the cell thickness increases, the two cells separate, and the stomata open; When the guard cell loses water, the cell shrinks, the cell thickness decreases, the two cells merge, and the stomata close So the opening and closing of the stomata is controlled by the guard cells

Study hard and make progress every day.

The guard cell regulates the water-absorbing stomata of the guard cell and closes the stomata of the guard cell for water loss.

It is mainly regulated by temperature, light intensity and humidity.