Plants convert light energy into chemical energy through photosynthesis.
Photosynthesis principle: Green plants have the ability of photosynthesis-with the help of light energy and chlorophyll, under the catalysis of enzymes, water, inorganic salts and carbon dioxide are used for photosynthesis, releasing oxygen, absorbing carbon dioxide, and producing organic substances such as glucose , For plant use. Among them, chlorophyll a and b have the highest absorption rate in the blue and red wavelength regions. Therefore, blue light 450nm and red light 660nm promote plant biomass and growth rate.
Photomorphogenesis: The process of forming the morphological structure of plant organs under light conditions. In order to be able to perceive the light intensity, light quality, light direction and photoperiod of the surrounding environment and respond to its changes, plants have evolved a photoreceptor system (photoreceptor). The photoreceptor is the key for plants to sense changes in the external environment. The main photoreceptor in the photoreaction of plants is phytochrome.
The photosensitizing pigments in plants exist in two relatively stable states: red light absorption type (Pr, lmax=660nm) and far-red light absorption type (Pfr, lmax=730nm). Phytochrome is a pigment protein that participates in photomorphogenesis and regulates plant development, and plays an important role in the entire growth and development process of plants from germination to maturity.
