Grow Lights Promote Photosynthesis In Plants, So What Is The Photosynthetic Mechanism? Affected By What?

Writer：Jane Time：2021-03-18 Browse：147

Broadly speaking, photosynthetic apparatus is the apparatus that can carry out partial or total reaction of photosynthesis, from small chloroplasts and thylakoids to large mesophyll cells, leaf organs, and even the whole plant body. In the narrow sense, it's chloroplasts.

First, photosynthetic apparatus is affected by light stress. Too strong or too weak light will lead to plant light stress, inhibit photosynthesis and reduce photosynthetic efficiency. Low light leads to yellowing phenomenon, and plants produce reactive oxygen free radicals under high light, resulting in photoinhibition.

Second, photosynthetic apparatus is affected by temperature. The periodic changes of temperature affect plant photosynthetic carbon fixation, reduction, sucrose synthesis, transport and distribution of photosynthetic products and electron transfer.

Third, photosynthetic apparatus is affected by nutrient supply. Nitrogen nutrition is the basis of plant life. The correlation coefficient between leaf photosynthetic capacity and nitrogen content was 0.9 on average. The photosynthetic rate of light saturation increased linearly with the increase of leaf nitrogen content. Therefore, it is very important to maintain the supply of nitrogen and other elements related to chlorophyll biosynthesis and metabolism to ensure the activity of photosynthetic apparatus.

Fourth, photosynthetic apparatus is affected by carbon dioxide. Carbon dioxide is the main raw material for photosynthesis, and the increase of carbon dioxide concentration in air at saturation point can increase the photosynthetic rate of plants, reduce transpiration, inhibit plant respiration, and significantly improve plant water use efficiency. Maintaining an appropriate CO₂ concentration is essential to promoting CO₂.

Fifth, the photosynthetic mechanism is affected by humidity and wind speed. Low stomatal conductance or high relative humidity of air will reduce the stomatal conductance of plant leaves, increase the resistance of carbon dioxide into leaves and reduce transpiration rate. Especially under the condition of low water and fertilizer supply, it is easy to lead to insufficient water nutrition of plants and reduce the effect of increasing carbon dioxide application. Wind speed will affect the uniform distribution of carbon dioxide in plant canopy and community, and affect the effect of increasing carbon dioxide application. Under the condition of sufficient water supply, high concentration of carbon dioxide increased the stomatal conductance of soybean leaves and decreased water evaporation. (Content from the network, if infringement, please contact delete)