Light intensity affects plant growth

Plants are affected by various environmental factors such as light intensity, temperature, and moisture during the growth, maturation, and aging, and the light intensity has a significant effect on the photosynthetic characteristics of plants. During the growth process, plants often experience changes in the light environment caused by cloud cover and plant canopy shade, which directly affect the photosynthesis, water status, and energy balance of the plants, and the growth and development of plants are affected to varying degrees. Affect the quality of plants. At present, it is widely believed that shading will increase the content of chlorophyll, especially the content of chlorophyll b and carotenoids, and reduce the light compensation point, light saturation point and photosynthetic rate. This is because light is the driving force for photosynthesis. In general, shading reduces the light intensity, which is not conducive to the maximum photosynthetic potential of plants, and is therefore not conducive to the normal growth of plants.
The photosynthetic characteristics of flue-cured tobacco leaves were affected by the light intensity experienced during its development. The flue-cured tobacco leaves grown under shading and weak light were narrow and long, light fresh and dry weight, and the content per leaf area was small. The content of chlorophyll was high, and the light compensation point The light saturation point decreases, the carboxylation efficiency and the maximum photosynthetic rate increase. The main reason may be that the tobacco leaves are exposed to low light stress after shading. On the one hand, the increase of chlorophyll content increases the ability of the leaves to transmit and transform light energy, which helps to capture more light energy to compensate for the lack of external light; on the other hand, it reduces The light compensation point and the light saturation point improve the utilization efficiency of weak light. It is directly reflected in the increase in apparent quantum yield and carboxylation efficiency. Under shading and low light conditions, the flue-cured tobacco leaves adjusted the components of photosynthetic apparatus to better capture light energy, enhanced the distribution of nitrogen in the chlorophyll protein complex and RuBP carboxylase, enhanced the assimilation of leaves and RuBP regeneration. The rate, which is reflected in the increase in photosynthetic rate (A350) when light is saturated and the photosynthesis rate (Amax) when Ci is saturated.
The light intensity has a profound effect on the growth of the plant, so if you can control the light intensity, it will inevitably promote the growth of the plant, light incubator is a good choice. The light incubator can freely set the illumination time and light intensity, and also can set the temperature. For plants that need different intensity of illumination at different times, the light incubator can do its best. Therefore, the light incubator has been successfully applied to various types of university laboratories, agricultural research bases, etc., and used as seeds for plant germination, seedling cultivation, microbial culture, and feeding of insects and small animals.