How was the habit of napping in plants discovered?

The essence of the plant sleep movement is constantly being revealed. What's even more interesting is that scientists have found that plants not only sleep at night, but also have the habit of napping just like humans. Wheat, sweet potatoes, soybeans, moso bamboo, and even trees, numerous plants take a nap.

It turns out that the napping of plants refers to the phenomenon that the stomata of the leaves are closed from about 11 noon to 14 pm, and photosynthesis is significantly reduced. This is what scientists observed when they used precision instruments to measure the photosynthesis of leaves.

Scientists believe that plant napping is mainly due to the dry and fiery atmosphere of the atmosphere. Naping is a drought-resistant instinct developed by plants over a long period of evolution, in order to reduce water loss and facilitate survival in adverse environments.

Due to reduced photosynthesis, napping can reduce crop yields, up to 1 3 or even more in severe cases. In order to improve crop yields, scientists have taken mitigating or even avoiding plant napping as a major topic.

Chinese researchers have found that increasing the temperature of field air by spraying can alleviate the phenomenon of wheat napping. The results showed that the panicle weight and grain weight of wheat increased significantly, and the yield increased significantly. It is a pity that the method of spraying to alleviate the napping of plants is still difficult to apply in large areas of arable land.

With the rapid development of science and technology, people will definitely create a good environment in the future, so that plants can work efficiently at noon and no longer take a nap.

The phenomenon of plant lunch break generally occurs in summer when the temperature is high at noon, because the temperature at noon is higher, the effect of transpiration will also be accelerated, and the water absorption can not keep up; At this time, in order to retain water, the plant will close the stomata on the leaves, resulting in the obstruction of carbon dioxide absorption, and the plant stops photosynthesis, and the phenomenon of plant lunch rest will occur.

The phenomenon of plant lunch breaks

Scientists have experimentally proven that the main cause of plant "napping" is high temperature. In the hot summer noon, the temperature is very high, the humidity in the air decreases, the transpiration of plants through the leaf stomata accelerates, in order to reduce the consumption of water, the stomata are gradually closed, so that carbon dioxide can not enter the leaves, photosynthesis raw materials are seriously deficient, so the photosynthesis intensity is correspondingly reduced. The results showed that when the temperature exceeded the appropriate temperature limit for plant photosynthesis, the plants began to "take a nap".

In addition to this, the "nap" of a plant is also related to factors such as its respiration and the concentration of carbon dioxide in the field. For example, peanuts, soybeans and other plants will also have a "nap" phenomenon due to the increased intensity of respiration at noon. At noon, the concentration of carbon dioxide in the air decreases, resulting in a shortage of photosynthetic raw materials, and the phenomenon of "napping" also occurs.

It is determined that the photosynthesis intensity of wheat increases with the increase of light in the suitable temperature range of photosynthesis, and when the temperature exceeds 25, the photosynthesis intensity decreases sharply with the increase of temperature. When the temperature exceeds 30, photosynthesis drops to a minimum and then to a negative value. The upper limit of suitable temperature for photosynthesis of different plants is also different, for example, wheat, wheat, flax, potato and other cool-loving crops are 25; 28 for heat-loving crops such as millet, millet, sorghum, cotton, and rice; There are also some crops above 28.

The reason for the phenomenon of plant lunch break is that the temperature at noon is higher, and the transpiration of plants accelerates, but the water absorbed by itself cannot keep up, that is, there will be a shortage of water. Therefore, in order to retain water in the body, plants will choose to close the stomata on the leaves when the temperature is high, so that the tissues absorb carbon dioxide, thereby weakening the photosynthesis of plants.

For example, plants such as sweet potato, moso bamboo, and wheat will have a lunch break, but not all plants will have a lunch break, such as corn, sorghum and other plants. Lunch breaks for plants occur most frequently at noon in the summer.

The phenomenon of plant lunch break generally occurs in summer when the temperature is high at noon, because the temperature at noon is higher, the effect of transpiration will also be accelerated, and the water absorption can not keep up; At this time, in order to retain water, the plant will close the stomata on the leaves, resulting in the obstruction of carbon dioxide absorption, and the plant stops photosynthesis, and the phenomenon of plant lunch rest will occur.

The phenomenon of plant lunch breaks

Scientists have experimentally proven that the main cause of plant "napping" is high temperature. In the hot summer noon, the temperature is very high, the humidity in the air decreases, the transpiration of plants through the leaf stomata accelerates, in order to reduce the consumption of water, the stomata are gradually closed, so that carbon dioxide can not enter the leaves, photosynthesis raw materials are seriously deficient, so the photosynthesis intensity is correspondingly reduced. Measurements show that when the temperature exceeds the appropriate high limit for plant photosynthesis, the plant begins to "take a nap".

In addition to this, the "nap" of a plant is also related to factors such as its respiration and the concentration of carbon dioxide in the field. For example, peanuts, soybeans and other plants will also have a "nap" phenomenon due to the increased intensity of respiration at noon. At noon, the concentration of carbon dioxide in the air decreases, resulting in a shortage of raw materials for photosynthesis, and the phenomenon of "napping" also occurs.

It is determined that the photosynthesis intensity of wheat increases with the increase of light in the suitable temperature range of photosynthesis, and when the temperature exceeds 25, the photosynthesis intensity decreases sharply with the increase of temperature. When the temperature exceeds 30, photosynthesis drops to a minimum and then to a negative value. The upper limit of suitable temperature for photosynthesis of different plants is also different, for example, wheat, wheat, flax, potato and other cool-loving crops are 25; millet, millet, sorghum, cotton, rice and other heat-loving crops were 28; There are also some crops above 28.

The main factors that cause photosynthetic "naps" are atmospheric drought and soil drought. In the dry and hot noon, the evapotranspiration of the leaves is aggravated, resulting in a lack of water in the roots of the plant.

Reduce the light intensity under the ability to cool the plants and hydrate them moderately, but do not water them at high temperatures, which will harm the plants.

Because the temperature is higher at noon, the transpiration of the leaves is enhanced, and the speed of water absorption by plants cannot catch up with the speed of water loss, which will cause the stomata of plant leaves to close, so that the carbon dioxide entering the mesophyll cells will be reduced, resulting in the weakening of plant photosynthesis, this phenomenon is called the "lunch break" phenomenon of photosynthesis.

While assimilating inorganic carbides, plants convert solar energy into chemical energy, which is stored in the organic compounds formed. The solar energy assimilated by photosynthesis is about 10 times the amount of energy required by humans every year.

The chemical energy stored in organic matter, in addition to the use of plants and all heterotrophs, is more important for human nutrition and activity**. Hence it can be said that photosynthesis provides the main energy source today. Greenery is a giant energy conversion station.