What is the effect of light at night on plants? The effect of day and night on plants

The effects of nighttime light on plants are mainly manifested in the following two aspects:

1.Disrupting the rhythm of the plant circadian clock: Plants, like other organisms, have obvious growth cycles, which is manifested in the fact that plants move according to the rhythm of the circadian clock in the body.

If outdoor lights irradiate plants at night, it will disrupt the rhythm of the biological clock in the plant, hindering its normal growth, especially for plants with long-term and high-radiation energy, which may cause the leaves or stems of the plant to change color or even die.

2.Effects on plant flower bud formation, dormancy and winter bud formation: The effects of light on plants, in addition to photosynthesis, also include plant photopericity, refraction, phototaxis and spectroscopic sensitivity.

This not only has an impact on the appearance of the plant, but also the formation of flower buds and the development of leaves are closely related to light. The amount of time a plant receives light is called the day length condition. If the day length is longer than a certain time, the plant that forms flower buds in this way is called a long-day plant; Plants with a shorter day length than a certain time are called short-day plants; There is also a so-called neutral plant that has nothing to do with the length of the day.

It is important to note that these effects vary depending on factors such as plant species and light intensity.

During the growth of the plant, the amount of light.

Both light quality and photoperiod have an impact on it. The study found that in low light, the light intensity was increased.

It can increase the photosynthetic rate, but when the light intensity increases to a certain value, it will no longer work. At this point, the factors that affect plant growth become temperature and carbon dioxide.

concentration. Red light and blue light are the two most important types of light in plant growth, and the red-blue light flux ratio (rb ratio) will affect the cultivation effect of plants, and other colors of light will also affect the growth of some plants to a certain extent. In addition, photoperiod also has an impact on the growth and development of plants.

At present, there have been many studies on the mechanism of the effect of photoperiod on plant growth and development, and many of these studies have explored the mechanism of light-induced flowering, in order to achieve effective regulation of the flowering period of ornamental plants.

It depends on what kind of plant, what kind of season, what kind of growing environment, and so on.

For example, green plants can also photosynthesize under light, so lights are often used in greenhouses to supplement light to increase crop yields.

In late autumn, street trees are more susceptible to frost damage due to the postponement of dormancy under the influence of street lights.

At night, plants grow towards the light, slowly changing their shape.

<> effects of diurnal variation on plants:

1. Under the condition of sufficient water, there is sufficient light during the day, the temperature is suitable, and the growth rate of plants is greater than that at night;

2. When the light is too strong and the temperature is high during the day, transpiration.

It is stronger, the plant loses more water, the water deficit phenomenon occurs in the body, and the growth of bright and slender is inhibited.

3. When the daytime and nighttime temperatures are similar, the growth rates of the day and night are similar.

Tips: The regular change of plant growth with the alternation of day and night is the cyclical nature of day and night, and with the phenomenon of day and night, light, temperature, and water also change periodically, thus affecting the growth rate of plants.

What are the effects of street lighting on plants at night? Is it beneficial or harmful?

Hello! Studies have shown that in low light, light can inhibit plant dormancy, thereby promoting growth, and is conducive to plant photosynthesis, but there is an upper limit to the light intensity required by plants, that is, the light saturation point. When the light intensity reaches the upper limit, the photosynthesis reaches its strongest, and when the upper limit is exceeded, it will cause the plant to produce photoinhibition and reduce the photosynthesis of the plant, which will have an adverse effect on the plant!

Summary. Plants can photosynthesize during the day, making organic matter, releasing oxygen, and absorbing carbon dioxide; It does not photosynthesize at night, and mainly respires, and like humans, absorbs oxygen and releases a large amount of dioxide. Plants need more water during the day, and transpiration is strong, and transpiration is weakened at night.

Hello, I am helping you to inquire about the relevant information and will reply to you immediately. The change of the pro-night eggplant has an impact on the plant, one is the photosynthesis of the plant during the day. The second is to sell it in bulk at night for respiration.

If the temperature difference between day and night is large, it is conducive to the reproductive growth of plants, and it is also conducive to flowering and fruiting. If the temperature difference is not large, it is conducive to vegetative growth, that is, it is convenient for the healthy and rapid growth of plants, so this characteristic can be used to promote the growth and flowering of plants.

Plants can photosynthesize during the day, make organic matter, release oxygen, and absorb carbon dioxide; At night, there is no photosynthesis in the first shed of dust, mainly respiration, and like humans, it absorbs oxygen and releases a large amount of dioxide. Plants need more water during the day, transpiration and slenderness, and transpiration weakens at night.

The large temperature difference between day and night is conducive to the transformation of nutrients and the accumulation of sugar.

During the day, the temperature is high, the light is strong, the carbon dioxide concentration is high, and the plants produce more organic matter such as sugars, which grow very quickly. At night, when there is no light, plants cannot produce organic matter, but instead need to consume their own organic matter to maintain their respiration. The level of sugar A in plants also depends mainly on the relationship between photosynthesis and respiration.

The temperature is high during the day, so that the activity of the two enzymes of photosynthesis and respiration is high, but photosynthesis is stronger than exhalation, more synthesis, less decomposition, and storage of sugars; At night, because there is no sunlight, you can't photosynthesize, you just breathe. The lower the temperature at night, the less respiration the plants will be, and the less organic matter such as sugars will be consumed.

Photosynthesis generally refers to the process by which green plants (including algae) absorb light energy and synthesize carbon dioxide (CO2) and water (H2O) into energetic organic matter, while releasing oxygen.

The large temperature difference between day and night is conducive to the transformation of nutrients and the accumulation of sugar.

During the day, the temperature is high, the light is strong, the carbon dioxide concentration is high, and the plants produce more organic matter such as sugars, which grow very quickly. At night, when there is no light, plants cannot produce organic matter, but need to rely on the collapse to consume their own organic matter to maintain their respiration. The level of sugar A in plants also depends mainly on the relationship between photosynthesis and respiration.

The high temperature during the day makes the activity of the two enzymes of photosynthesis and respiration high, but photosynthesis is stronger than exhalation, synthesizes more, decomposes less, and stores carbohydrates; At night, because there is no sunlight, you can't photosynthesize, you just breathe. The lower the temperature at night, the less respiration the plants will be, and the less organic matter such as sugars will be consumed.

Glossy rubber synthesis is usually a process in which green plants (including algae) absorb light energy and synthesize carbon dioxide (CO2) and water (H2O) into energetic organic compounds, while releasing oxygen.

Photosynthesis of <> plants refers to the process in which green plants use light energy to convert carbon dioxide and water into organic matter that stores energy and release oxygen through chloroplasts. The process of photosynthesis is divided into two phases: the light reaction phase and the dark reaction phase.

The chemical reaction in the first stage of photosynthesis must have light energy to proceed, and this stage is called the Kunachang photoreaction stage. The chemical reaction in the photoreaction stage is carried out on the thlakoid chakra within the chloroplast.

The chemical reaction in the second stage of photosynthesis, which can be carried out without light energy, is called the dark reaction stage. The chemical reactions in the dark reaction phase are carried out in the matrix within the chloroplast.

The light reaction stage and the dark reaction stage are a whole, and in the process of photosynthesis, the two are closely related and indispensable.

In the absence of light at night, plants do not photosynthesize completely, and only have a dark reaction in photosynthesis. A dark reaction is essentially a series of enzymatic reactions. Different plants have different processes of dark reactions, and the anatomy of the leaves is also different, which is the result of the plant's adaptation to the environment.

Therefore, nocturnal plants undergo incomplete photosynthesis.