Is transpiration carried out 24 hours a day?

It has a lot to do with the environment, and the temperature is high during the day, and transpiration is strong when the light is strong, and it is very slow at night.

Transpiration is the process of water being lost from the surface of the living plant body (mainly leaves) to the atmosphere in a state of water vapor, which is different from the evaporation process of physics, transpiration is not only affected by external environmental conditions, but also regulated and controlled by the plant itself, so it is a complex physiological process. When plants are young, all surfaces exposed to air can transpire.

The transpiration of growing plants is mainly in the leaves. There are two ways of leaf transpiration: one is transpiration through the stratum corneum, which is called cuticle transpiration; The second is transpiration through stomatal transpiration, which is called stomatal transpiration, and stomatal transpiration is the most important way of plant transpiration.

Physiological significance of transpiration: it is the main driving force for plants to absorb and transport water, which can accelerate the rate of transport of inorganic salts to the aboveground parts, reduce the temperature of the plant body, and enable the leaves to photosynthesize under strong light without being damaged. The amount of water lost by plant transpiration is significant.

It is estimated that it takes one corn plant to be consumed from seedling emergence to harvest.

Four or five hundred pounds of water. Autotrophic green plants must exchange gases with their surroundings during photosynthesis. Therefore, the water in the plant is inevitably lost along the water potential gradient, which is the inevitable result of the plant's adaptation to life on land.

Proper inhibition of transpiration not only reduces water consumption, but is also beneficial to plant growth. Under high humidity conditions, the plant grows more luxuriantly. In the production of vegetables and other crops, the use of sprinkler irrigation can increase air humidity and reduce transpiration, which can generally increase yield compared with soil irrigation.

The process of transpiration is as follows: moisture in the soil, root hairs, intraroot ducts, intrastem ducts, intraphyllous ducts, mesophyll cells, stomata, atmosphere.

Transpiration is not photosynthesis, so it proceeds at night.

Transpiration is carried out on the leaves in two ways:

One is found in the cuticle of the leaves.

on, which is keratinous transpiration;

The other is that it appears on the leaf stomata, which is stomatal transpiration.

In order to reduce the adverse effects of transpiration on plants, a cuticle is formed on the surface of the leaves of plants, which effectively prevents water loss.

In addition, the stomata on the leaves of the plant have a delicate structure that also slows down the rate of water loss. So transpiration.

The main mode is stomatal transpiration.

Question 1: When does the plant carry out transpiration The transpiration of the plant has a great relationship with the environment, generally the temperature is high during the day, and the transpiration is strong when the light is strong, and the nail is very slow at night, and it is not easy to find. Of course, the prerequisite is that the stomata are opened, the stomata are closed, and transpiration basically stops.

Question 2: When can photosynthesis, respiration, and transpiration be carried out From the concept of photosynthesis, it can be seen that photosynthesis can only be carried out with light, and respiration and transpiration can be carried out with and without light There is light during the day, so plants can carry out photosynthesis, respiration and transpiration at the same time, and without light at night, plants cannot carry out photosyncretization, but can only carry out respiration and transpiration Therefore, the answer is: Test question analysis:

The organic matter in the cell is decomposed into carbon dioxide and water with the participation of oxygen, and the process of releasing energy at the same time is called respiration, this physiological activity is carried out by all living cells, and the specific part is carried out in the mitochondria of all living cells, while photosynthesis is only carried out in living cells containing chloroplasts, and transpiration is mainly carried out.

Question 3: When does plant transpiration? Plant transpiration is related to environmental factors, and its diurnal variation is determined by external conditions.

When the temperature is not too high and the moisture is sufficient, transpiration increases with the increase of light intensity and temperature, reaching a peak from 12 noon to 2 pm, and with the weakening of light, transpiration also weakens, and is close to stopping.

Question 4: When does transpiration occur at noon when the sun is exposed.

Question 5: When is the transpiration of plants? Photosynthesis takes place only when there is light.

Question 6: When do plants take transpiration and absorption? (All day, day, or night?) The absorption of water by plants and the absorption of mineral elements are two independent processes.

Transpiration and absorption are carried out throughout the day, but with the change of the external environment, the intensity is different.

Simple, clear answers, can't be wrong!

If you don't believe it, you must have a similar problem if you flip through the exercises in the part of the mineral elements.

Transpiration is mainly carried out through the leaves.

Spring, summer, autumn and winter, the four seasons are different, spring and summer rain more, autumn and winter dry and less rain, how do plants skillfully adapt to environmental changes? Its strategy is to regulate moisture by opening and closing the pores freely.

When it is humid and hot, the leaf cells absorb water and swell, and the stomata open, expelling excess water from the body into the atmosphere. However, in dry weather, the guard cells shrink in the event of dehydration, and the stomata are closed, ensuring that water is firmly locked in the plant's body. The process by which water is lost from the surface of living plants into the atmosphere in a state of water vapor is called transpiration.

This action is mainly carried out through the blades.

Transpiration is the process of water loss from the surface of living plants (mainly leaves) to the atmosphere in a state of water vapor, which is different from the evaporation process in physics, transpiration is not only affected by external environmental conditions, but also regulated and controlled by the plant itself, so it is a complex physiological process.

Classification of methods:

1. Transpiration.

The transpiration of woody plants through the cracks in the bark pores of branches and cork tissues is called cutaneous transpiration. However, the amount of canopy transpiration is very small, accounting for about the total canopy transpiration.

2. Stratoria corneum transpiration.

Transpiration through the cuticle of leaves and herbaceous stems, called cuticle transpiration, accounts for about 5% to 10% of transpiration. The cutaneous transpiration of young leaves can reach 1 3 to 1 2 of the total transpiration. In general, the transpiration of mature leaves of plants accounts for 5% to 10% of the total transpiration.

Plants that have grown under drought conditions for a long time have lower cuticle transpiration, with total transpiration of less than 5%.

3. Stomatal transpiration.

Stomata are important gateways for in and out of the body of plants. Water vapor (H2O), carbon dioxide (CO), and oxygen (O2) all share the stomata channel, and the opening and closing of the stomata will affect the physiological processes of plants such as transpiration, photosynthesis, and respiration.

Stomata are small pores in the epidermal tissue of plant leaves, which are generally composed of pairs of guard cells. Guard cells are surrounded by epidermal cells, and adjoining epidermal cells that are morphologically identical to other epidermal cells are called neighbouring cells, or subsidiary cells if they are distinctly different. The guard cells form a stomatal complex with neighboring cells or paraguard cells.

Guard cells are morphologically and physiologically distinct from epidermal cells.

The external factors affecting transpiration depend on the vapor pressure difference between the inside and outside of the leaf and the diffusion resistance. Therefore, all external factors that affect the vapor pressure difference and diffusion resistance inside and outside the leaf will affect the transpiration rate. Transpiration is affected by light:

Light promotes the opening of the stomata and increases transpiration. Affected by moisture conditions: Sufficient moisture is conducive to the opening of the stomata and too much moisture can cause the stomata to close.

Temperature has a great influence on the rate of transpiration. When the atmospheric temperature decreases, the leaf temperature is 2 10 higher than the air temperature, so the increase of vapor pressure in the cavity under the stomata is greater than the increase of air vapor pressure, which increases the vapor pressure difference between the inside and outside of the leaf and increases the transpiration rate. When the temperature is too high, the leaves lose too much water, the stomata close, and transpiration weakens.

When the humidity is at the same temperature, the greater the relative humidity of the atmosphere, the greater the vapor pressure, the smaller the vapor pressure difference between the inside and outside of the leaf, and the water vapor in the cavity under the stomata is not easy to diffuse, and the transpiration is weakened. Conversely, when the relative humidity of the atmosphere is low, the transpiration rate increases.

The large wind speed can blow away the water vapor diffusion layer outside the leaf stomata and replace it with air with low relative humidity, which not only reduces the diffusion resistance, but also increases the vapor pressure difference inside and outside the leaf, which can accelerate transpiration. Strong winds may cause stomata to close, internal resistance to increase, and transpiration to weaken.

1. Transpiration is the process of water being lost to the atmosphere from the surface of the living plant or the surface of the plant body (mainly leaves) in a state of water vapor, which is different from the evaporation process of physics, transpiration is not only affected by external environmental conditions, but also regulated by the plant itself, and controlled by the hail hunger and hunger of the plant itself, so it is a complex physiological process.

2. The main processes are: moisture in the soil, root hairs, root ducts, stem ducts, leaf ducts, stomata and atmosphere. When plants are young, all surfaces exposed to air can transpire.

Summary. 1.Lowers the temperature of the leaves, reduces the burning of sunlight; 2. Promote the absorption and transportation of inorganic salts and water in the body;

1.Lowers the temperature of the leaves, reduces the burning of sunlight; 2. Promote the absorption and transportation of inorganic salts and water in the body;

Can you elaborate on that a little bit more?

99% of the water absorbed by green plants through the roots is evaporated into the atmosphere in the form of water vapor through transpiration, which is not a waste of water, transpiration has its positive significance, one is to provide an upward driving force for plants to absorb water, and at the same time, the inorganic salts dissolved in the water are also absorbed and transported together with the answer Second, transpiration can improve the humidity of the atmosphere, increase precipitation, and replenish groundwater Third, transpiration can take away the heat in the plant. so that the plants do not get roasted to death in the hot summer

During the day, when the light is strong, the stomata of the plant open, and the plant's.

Transpiration. At night, when there is no light, the stomata of the plant will close or shrink, and the transpiration of the plant will be weak, rather than stopping, so the plant will carry out transpiration both day and night

Therefore, c

Transpiration is the process of water being lost into the atmosphere from the living plant through the stomata (mainly in the leaves) in a state of water vapor deficiency, and transpiration is not only affected by the external environmental conditions, but also by the regulation and control of the plant itself. The increase of air humidity will lead to the weakening of transpiration

We call the convex lens-shaped pores formed between the guard cells as stomata In the gas metabolism such as respiration and transpiration, the stomata become the pathway of air and water vapor, and the amount of their passage is regulated by the opening and closing of the guard cells, which is of great significance in physiology It is called the "gateway" of plant transpiration and water loss, and it is also the "window" of gas exchange Therefore, the opening and closing of the stomata can regulate the transpiration of water In the daytime, the light is strong, the stomata of the plant are opened, and the transpiration of the plant is strong, and at night, there is no light, the stomata of the plant will close or shrink, and the transpiration of the plant will be weak, rather than stopped, so the plant will carry out transpiration both day and night

Therefore, a