Effects of the most flaming light quality on plant

Effects of light quality on plant growth and development

light quality has a great impact on plant growth and development, photosynthetic characteristics, yield, quality and so on. The research shows that green light and red light can significantly promote the elongation of colored sweet pepper seedlings, blue light can dwarf seedlings, the effect of compound light is better than that of monochromatic light, and it is obviously overgrown under green light. Red light was not conducive to the increase of chrysanthemum stems, and the stem length of red light treatment was 43.0% less than that of the control; There are also reports that red light is conducive to the stem thickening of chrysanthemum plants. Increasing the proportion of blue light can effectively reduce the plant height of cucumber seedlings, and increasing the proportion of red light can make the products of photosynthesis more transported to the leaves of seedlings. Chlorophyll a, chlorophyll b and carotenoids of lettuce increased with the increase of blue light ratio. Treatment with blue light or increasing the proportion of blue light significantly increased the content of chlorophyll in plants, thereby significantly increasing the photosynthetic rate of plants. It shows that the higher proportion of blue light intensity may be conducive to the synthesis of photosynthetic pigments. The photosynthesis of plants with 7% blue light in the combination of red and blue light can work normally; With the increase of the proportion of blue light, the photosynthetic capacity of leaves also increased, but when the proportion of blue light exceeded 50%, the photosynthetic capacity of leaves would decrease

under the irradiation of single red light quality, plants have more dry matter accumulation, longer internodes, smaller stem diameter, smaller leaves, and high total sugar content; Under the irradiation of single blue light, the dry matter accumulation of plants is less, the internodes are shorter, and the stems are thicker, which inhibits the elongation and growth of stems to a certain extent. The content of soluble sugar in leaves of cucumber seedlings treated with red light was the highest, and the content of soluble protein in leaves treated with blue light was the highest, which was significantly different from the control. The chlorophyll content, stomatal conductance and transpiration rate of tomato seedlings treated with red light increased, and the photosynthetic rate was significantly higher than that of other treatments; The chlorophyll content of blue light treatment was slightly lower, but the photosynthetic rate was still significantly higher than that of the control. The reason may be that blue light promoted the opening of stomata and increased the intercellular CO2 concentration of leaves. The increase of stomatal conductance in plant leaves was specifically induced by blue light

for most plants, red light can promote the increase of leaf area. Under the treatment of red light, radish seedlings, Toona sinensis seedlings, tomatoes and cucumbers still use less stepper motors, and the leaves of seedlings, tobacco, herbicin and lettuce expand faster and have larger leaves. Similarly, blue light can increase the leaf area, but blue light inhibits the leaf expansion of tobacco, poinsettia, and flowering grass. Adding blue light to red light can significantly improve the leaf area of lettuce. The leaf area of spinach under red, blue and yellow light treatment was significantly larger than that of other treatments. Red light treatment is conducive to the accumulation of dry matter in tomato, eggplant, cucumber, lettuce and other crops. Red and blue compound light promoted the biomass increase of pepper, Phalaenopsis, Osmunda japonica and cucumber. Adding green light, yellow light, purple light and white light to the combination of red and blue light has a significant impact on the biomass of lettuce, cherry tomato and non heading cabbage

red light is conducive to the accumulation of carbohydrates in plants. Red light treatment can significantly increase the soluble sugar content of spinach, cucumber, pepper, tomato seedlings and radish sprouts. Red light can promote the accumulation of starch, which has been reported in soybeans, cotton, sunflower sprouts and Brassica napus. Because the output of photosynthetic products in leaves can be inhibited by red light, so that starch accumulates in leaves. The change of soluble protein content in leaves is one of the reliable indicators to reflect the physiological function of leaves. Blue light is conducive to protein synthesis. Blue light promoted the soluble protein content of pea seedlings, lettuce, cucumber and sprouts. Blue light significantly promoted the increase of total amino acids and sugar content in Chrysanthemum leaves. Current studies have found that blue light can significantly promote the dark respiration of mitochondria, and the organic acids produced in the process of respiration can be used as a carbon frame for the synthesis of amino acids, which is conducive to protein synthesis

composite spectra also have different effects on photosynthetic products of plants. Zhejiang Jingcheng Mold Machinery Co., Ltd. pioneered the flat die fluid visualization intelligent system (micro interactive system for short). Yellow light is beneficial to the synthesis of soluble sugar and protein in lettuce, the formation of sucrose content in tomato and the accumulation of free amino acids in rape sprouts. Low dose UV-B combined with red light significantly increased the accumulation of sugar content in tomatoes. Blue light and UV-A can promote the synthesis of cucumber fruit protein. The combination of blue and red light promoted the accumulation of soluble protein. Red blue white compound light promoted the synthesis of soluble sugar and nitrogen content. The total starch content of tomato seedlings treated with red, blue and green light was the highest. As an endogenous active oxygen scavenger in plants, SOD can effectively remove active oxygen and keep it at a low level only by maintaining a high activity in adversity, so as to reduce its damage to membrane structure and function

the study found that the SOD activity of colored sweet pepper seedlings was the highest under green light, and there was no significant difference between blue light and red light; Pod is an active oxygen scavenger. The increase of its activity can reduce the damage of active oxygen to the membrane, and the activity of pod is the lowest under green light; Cat can remove free radicals, maintain the integrity of the membrane system, and reduce the damage of adverse environment to plants. CAT activity under white light is the highest, followed by blue light. CAT activity under green light is higher, and the enzyme activity under yellow and red light is similar. Purple light and blue light can alleviate the aging of Cucumber Seedlings by improving the activity and gene expression of antioxidant enzymes such as cat, delaying the degradation of chlorophyll and soluble protein and membrane peroxidation

red and blue light are the main light sources absorbed by plants and also the signal light sources of the main light receptors of plants. Under weak light conditions, the LED red and blue light source can effectively control the overgrowth of cucumber seedlings, improve the quality of seedlings, and alleviate the physiological stress damage under weak light. Red and blue compound light promoted the biomass accumulation of pepper, rice seedlings and lettuce plants at five leaf stage. The combination of red and blue light sources with blue light accounting for 60% may be a relatively good light source for cherry tomato fruit quality. The leaf area value of Tomato Seedlings under red/blue (2:1) light supplement is the largest, but the leaf area value under red/blue (7:1) light supplement is relatively small in the red blue compound light, indicating that the increase of the proportion of red light can only promote leaf growth in a certain range

red light is conducive to the radial growth of the stems and leaves of oilseed rape, and an appropriate increase in the proportion of blue light is conducive to the transverse growth of the stems and leaves, root development and photosynthetic pigment synthesis. The plant is not easy to lodging, and can improve the photosynthetic, transpiration and fluorescence characteristics of the leaves, so as to promote the growth of oilseed rape and increase the biomass and nutrient content. Weak light conditions will reduce the content of soluble protein in cucumber seedlings, after red and blue light, soluble protein increased significantly. The content of soluble sugar and soluble protein in the leaves of Tomato Seedlings under red/blue (2:1) illumination reached the maximum. Led mixed red and blue light source treatment of gourd and pumpkin seedlings has developed roots, high dry matter content, increased seedling index and improved seedling quality; The increase of blue light component in red and blue mixed LED inhibited the elongation of seedling stem and promoted the increase of seedling stem diameter

the leaf area, soluble sugar, starch, carbohydrate, sucrose and c/n of lettuce seedlings under red and blue light were the largest and significantly higher than those under red light, indicating that adding an appropriate amount of blue light to red light was more conducive to the accumulation of carbohydrate in lettuce seedlings. The treatment of 25% and 50% blue light is conducive to the accumulation of lettuce biomass, with more photosynthetic pigments, larger leaf area, thicker leaves, conducive to photosynthesis. At the same time, the root system is well developed and has strong activity, which is conducive to the absorption of nutrients and water, and its growth is better than other treatments. Chlorophyll content was greatly affected by r/b ratio. Blue light significantly reduced the chlorophyll content in strawberry leaves. 660nm red light and 450nm blue light can regulate the content of chlorophyll in lettuce. With the increase of blue light and the decrease of red light, the content of chlorophyll a and B gradually decreases. The net photosynthetic rate and stomatal conductance of cucumber seedlings treated with red and blue light were the largest, while the net photosynthetic rate, stomatal conductance and transpiration rate of single red and blue light were smaller, but their intercellular CO2 concentration was higher. Appropriately increasing Blue China is still in the deep development stage of industrialization, informatization, urbanization, marketization and internationalization. Light energy improves the antioxidant enzyme activity of tomato seedlings. With the increase of the proportion of red light, the antioxidant enzyme activities such as SOD and cat first increase and then decrease, and the SOD activity under r/b (2:1) supplementary light decreases

most studies have shown that blue light can reduce the fresh and dry weight of plants. With the increase of the proportion of blue light, the dry weight and fresh weight of lettuce increased first and then decreased. At different growth stages, the effect of blue light on the biomass of Wuta is different. The increase of biomass in the early growth stage is inversely proportional to the red/blue value, and is proportional to the red/blue value in the late growth stage. Blue violet light has an inhibitory effect on stem elongation. Compared with white light, blue violet light significantly reduced the plant height and increased the stem diameter of ginger. In terms of the effect of light quality on roots, studies have shown that oat plants treated with blue and purple light have more roots and developed roots

the study found that red/blue (1 ∶ 1) combined light can significantly improve the growth and quality of lettuce; Red/blue (7 ∶ 3) is the most suitable light quality condition for the growth of cucumber seedlings, and the maximum photosynthetic rate can reach 4 times that under monochromatic red light. When the red/Blue ratio was 8 ∶ 1, lettuce showed obvious photosynthetic advantage. On the basis of red and blue compound light, adding yellow light is conducive to the synthesis of photosynthetic pigments in spinach and significantly promote the growth of spinach. Adding yellow light and purple light can improve the photosynthetic potential of cherry tomato seedlings and alleviate the red and blue weak light stress

the impact of light quality on vegetable quality

light quality can affect many physiological processes of plants, especially in photosynthesis and plant morphogenesis. The rational use of light waves that actively promote supply chain management innovation for specific companies is conducive to improving the nutritional quality of vegetables

it is generally believed that red light is conducive to the accumulation of carbohydrates, can promote the synthesis of soluble sugars, but is not conducive to the accumulation of soluble proteins; Blue light can promote protein formation. Red and blue light helps reduce nitrate absorption. The soluble sugar content of lettuce was higher under blue light or red blue light treatment. Compared with white light, red light and blue light treatment significantly reduced the nitrate content of lettuce aboveground. Under the same light intensity and illumination time, red blue white mixed LED illumination can reduce more nitrate content in hydroponic culture than red blue illumination; Under the condition of white light, the nitrate content in lettuce was reduced by adding blue light or green light

different light quality has different effects on the formation of secondary metabolites in plant organs. Compared with white light control, red light, blue light and red blue mixed light can promote the degradation rate of chlorophyll in colored sweet pepper fruits, improve the synthesis rate of carotenoids and anthocyanins, and slow down the synthesis rate of flavonoids. Blue light can induce the accumulation of flavonoids and anthocyanins, and increasing the proportion of blue light can promote the formation of lycopene and flavonoids in tomato fruit. Adding UV-B and blue light to lettuce at night can increase the content of quercetin in lettuce. The contents of anthocyanins and carotenoids in lettuce leaves supplemented with UV and blue light increased significantly; Blue light increased the chlorophyll content of lettuce. The treatment of supplementing blue light at night had the highest content of total phenols and flavonoids in leaves and antioxidant capacity; Compared with white light treatment, red light treatment significantly increased the anthocyanin content of lettuce shoot, and blue light treatment significantly increased the anthocyanin content of lettuce shoot