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Effect of different colors of light on the rate of photosynthesis.
Results of these experiments suggest that violet, blue, and red light with peaks away from the absorption maxima of carotenoids present in zooxanthellae are most efficient in the promotion of photosynthesis. See Table 9.
The Effects of pH Levels and Phosphorous on the Photosynthesis Process of Aquatic PlantsStudy the coniferous spruce tree (Picea glauca as the species of choice) by measuring its lateral and sub-lateral branch angles in order to see how it collects sunlight from various angles on its south-facing side.
Light is photosynthesis fuel. It’s that simple.
PAM Fluorometer: A device capable of monitoring chlorophyll fluorescence, and is capable of calculating the fate of absorbed light energy, either through photosynthesis or two other dissipation pathways (including NPQ: Non-Photochemical Quenching of chlorophyll fluorescence by protective xanthophylls) or NO (dissipation by other pathways, including photoinhibition.) PAM stands for Pulse Amplitude Modulated light intensity. PAR (Photosynthetically Active Radiation): That visible light energy between 400 and 700nm. It is important to note that photosynthesis does not simply stop at wavelengths below 400nm - violet and some ultraviolet wavelengths can promote photosynthesis!
What’s really disappointing is that these same LED grow light companies claim or imply, because most of them won’t mention cannabis, that their products target specific colors best for cannabis photosynthesis.
Figure 24. Red light generated the highest rates of photosynthesis.
Advanced technology allows quick determination of a light source's ability to promote photosynthesis. The availability of two devices has made this possible: A 'photosynthesis meter' (a PAM fluorometer, which allows in-situ determination of rates of photosynthesis) and LEDs (Light-Emitting Diodes of high efficiencies when combined with lenses to create intense light fields.)
Determination of efficient (photosynthetically speaking) light sources is important for several reasons. Economy in the costs of maintaining a coral reef aquarium certainly is a concern, but the health of zooxanthellae and hence their animal host should be of primary importance. Aesthetic concerns, such as the promotion of coral coloration through expression of fluorescent proteins and non-fluorescent chromoproteins, are of interest to many.
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Are plants using green light for photosynthesis
Effect of different colors of light on the rate of photosynthesisThe effect of different lights on plant growth: incandescent light, fluorescent light, sunlight and black light.
Photosynthesis Science Fair Projects and Experiments
The effects of various pH levels on the photosynthesis process of the aquatic plant elodeaThe effects of phosphorous on the photosynthesis of aquatic plantsDoes light affect stem growth?
What is Photosynthesis? (with pictures) - wiseGEEK
The radiometric power of a photon matters not in photosynthesis - a blue photon (with high radiometric power) will drive photosynthesis just as well as a photon of lesser energy (say, a red photon.) So, it would seem that the issue is settled. It is not. The adage 'a photon is a photon' is true when discussing light production by various light sources, but it is not correct when considering how different light wavelengths (or bandwidths) promote photosynthesis.
The Only LED Grow Lights for Marijuana - Big Buds Magazine
As everybody knows, light is very important for the process photosynthesis in plant. In the absence of this, no plants could produce food. But light can also be too hot, too intense, and last long and good for growing healthy plants. It is very virtual that, more light seems to be better than other, most especially the. With the provision of abundant light, you could accelerate the growth of the plants. This is possible just because the more the plant’s leaves have exposure to the light, the more the plant growth is affected positively, with the process called photosynthesis.
One farmer performed an experiment some years back, he left two identical planters in the greenhouse for the winter. There was a little separation between the two , one was placed under a led grow light but the other one was not. During spring, the difference was very amazing. The plants in the container under the led grow light were nearly 30% larger and healthy than those not receiving the additional light. There was a serious supervision on this for some months, and the two containers have always been seriously supervised. After some years, it’s still totally evident to all that the one inside the container was under the additional light and grew up excellently. The other container that did not get the added light is perfectly healthy, but smaller. With this sited example, many plants, however, winter days are just not long enough. Higher percentage of plants need 14 hours or more of light per day while some need as many as 18.
Using led grow light to your beautiful home is an excellent option. Are you living in the North and don’t get enough hours of winter daylight? will be the right option in replacing some of the missing lights. Are you living in a southern side where your property for a beautiful house is, then the use of these our light products will be a supplement in the day’s length as well as the quality and intensity of light. If your surroundings are not well illuminated then you can add more light for better illumination. Then you will be surprised of the result and the positive impact this will cause.
Photosynthesis kit - Welcome to the NCBE
This article will examine photosynthetic efficiencies of various LEDs. Specifically, six light sources were tested for photosynthetic responses by zooxanthellae found in the stony coral (most likely of Clade C15.) The light sources include a black light (mostly UV-A produced by a fluorescent lamp), and LEDs radiating energy at peaks of 400nm (UV-A/violet), a 418nm LED (producing mostly violet with a small amount of UV-A), a blue/white LED combination peaking at white light with a peak 443nm and 457nm, a 'white' LED with a blue peak at 443nm, and red LEDs producing maximal light at 631nm and 657nm. All tests were performed when light intensity was at sub-saturating levels. Evidence suggests absorption by carotenoids is responsible for lessened photosynthetic efficiencies at 450 nm and 470 nm.
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