Light plays a particularly important role in the growth and development of plants, and it affects almost all growth stages of plants.
The effects of light on plants are mainly manifested in two aspects: One is to provide radiant energy for plant photosynthesis; The second is as a signal to regulate many physiological processes throughout the life cycle of plants.
Generally, the growth and development of plants depend on sunlight, but the factory production of vegetables, flowers and other economic crops, tissue culture, and the propagation of test tube seedlings also require artificial light sources to supplement light to promote photosynthesis.
Photosynthesis refers to the process by which green plants use light energy through chloroplasts to convert carbon dioxide and water into energy-storing organic matter and release oxygen. The key participant in this process is the chloroplast inside the plant cell. Under the action of sunlight, the chloroplast converts the carbon dioxide that enters the leaves through the stomata and the water absorbed by the roots into glucose and releases oxygen at the same time.
The photosystem that undergoes photoreaction is composed of a variety of pigments, such as chlorophyll a (Chlorophyll a), chlorophyll b (Chlorophyll b), and carotenoids (Catotenoids). The main absorption spectra of chlorophyll a, chlorophyll b and carotenoids are concentrated at 450nm and 660nm, so in order to promote photosynthesis, 450nm deep blue LED and 660nm super red LED are mainly used, and some white LEDs are combined to achieve this. Efficient LED plant lighting.
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 photoreceptive system (photoreceptor).
Photoreceptors are the key for plants to sense changes in the external environment. In the photoreaction of plants, the most important photoreceptors are phytochromes that absorb red light/far-red light.
Phytochrome is a type of pigment protein that has a reversal effect on the absorption of red light and far red light, participates in light morphogenesis, and regulates plant development. It is resistant to red light (R) and far red light (FR). It is extremely sensitive and plays an important role in regulating the growth and development of plants from germination to maturity.
Phytochromes in plants exist in two relatively stable states: red light-absorbing type (Pr, lmax=660nm) and far-red light-absorbing type (Pfr, lmax=730nm). The two light absorption types can reverse each other under the irradiation of red light and far-red light.
Studies on phytochromes have shown that the effects of phytochromes (Pr, Pfr) on plant morphology include seed germination, de-yellowing, stem elongation, leaf expansion, shade avoidance, and flowering induction.
Therefore, a complete LED plant lighting program not only requires 450 nm blue light and 660 nm red light, but also requires 730 nm far red light. Deep blue light (450nm) and super red light (660nm) can provide the spectrum required for photosynthesis, and far red light (730nm) can control the whole process of plants from germination to vegetative growth and flowering.
Therefore, the proper combination of dark blue (450nm), super red (660nm) and far red light (730nm) can provide better chromatographic coverage and the best growth mode.
You are welcome to share more ideas about plant growth lighting solutions with us. We are also very happy to become friends and partners with you, and grow stronger leaves and fruits together!
The effect of light on plant growth
Light plays a particularly important role in the growth and development of plants, and it affects almost all growth stages of plants.
The effects of light on plants are mainly manifested in two aspects:
One is to provide radiant energy for plant photosynthesis;
The second is as a signal to regulate many physiological processes throughout the life cycle of plants.
Generally, the growth and development of plants depend on sunlight, but the factory production of vegetables, flowers and other economic crops, tissue culture, and the propagation of test tube seedlings also require artificial light sources to supplement light to promote photosynthesis.
Photosynthesis refers to the process by which green plants use light energy through chloroplasts to convert carbon dioxide and water into energy-storing organic matter and release oxygen. The key participant in this process is the chloroplast inside the plant cell. Under the action of sunlight, the chloroplast converts the carbon dioxide that enters the leaves through the stomata and the water absorbed by the roots into glucose and releases oxygen at the same time.
The photosystem that undergoes photoreaction is composed of a variety of pigments, such as chlorophyll a (Chlorophyll a), chlorophyll b (Chlorophyll b), and carotenoids (Catotenoids). The main absorption spectra of chlorophyll a, chlorophyll b and carotenoids are concentrated at 450nm and 660nm, so in order to promote photosynthesis, 450nm deep blue LED and 660nm super red LED are mainly used, and some white LEDs are combined to achieve this. Efficient LED plant lighting.
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 photoreceptive system (photoreceptor).
Photoreceptors are the key for plants to sense changes in the external environment. In the photoreaction of plants, the most important photoreceptors are phytochromes that absorb red light/far-red light.
Phytochrome is a type of pigment protein that has a reversal effect on the absorption of red light and far red light, participates in light morphogenesis, and regulates plant development. It is resistant to red light (R) and far red light (FR). It is extremely sensitive and plays an important role in regulating the growth and development of plants from germination to maturity.
Phytochromes in plants exist in two relatively stable states: red light-absorbing type (Pr, lmax=660nm) and far-red light-absorbing type (Pfr, lmax=730nm). The two light absorption types can reverse each other under the irradiation of red light and far-red light.
Studies on phytochromes have shown that the effects of phytochromes (Pr, Pfr) on plant morphology include seed germination, de-yellowing, stem elongation, leaf expansion, shade avoidance, and flowering induction.
Therefore, a complete LED plant lighting program not only requires 450 nm blue light and 660 nm red light, but also requires 730 nm far red light. Deep blue light (450nm) and super red light (660nm) can provide the spectrum required for photosynthesis, and far red light (730nm) can control the whole process of plants from germination to vegetative growth and flowering.
Therefore, the proper combination of dark blue (450nm), super red (660nm) and far red light (730nm) can provide better chromatographic coverage and the best growth mode.
You are welcome to share more ideas about plant growth lighting solutions with us. We are also very happy to become friends and partners with you, and grow stronger leaves and fruits together!