How does light intensity cause the rate of photosynthesis to go up or down?
So in the case of a plant, a higher light intensity means more packets of light called “photons” are hitting the leaves. As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis.
What effect does low light intensity have on the rate of photosynthesis?
Too high or too low PAR intensities adversely affect the photosynthetic machinery. At low light intensities above the light compensation point (LCP), photosynthetic rate increases proportionally to the light intensity and reaches a maximum.
What light intensity is best for photosynthesis?
The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm) and red range (600–700 nm). Therefore, the best light sources for photosynthesis should ideally emit light in the blue and red ranges.
At what temperature do most plants stop photosynthesis?
At a temperature above 104 degrees Fahrenheit – 40 degrees Celsius – the enzymes that carry out photosynthesis lose their shape and functionality, and the photosynthetic rate declines rapidly.
Which light range is least effective in photosynthesis?
green light
In the visible spectrum green light is the least efficiently used color. The wavelength of green light ranges from 495 – 570 nm. The frequency of green light is 5.45 (104 Hz). From the above information we have found that green light range is least effective in photosynthesis.
In which Colour of light is the rate of photosynthesis highest?
red light
Additional Information: -When a plant is given monochromatic light (single light color), the highest absorption of blue light is seen, but the highest photosynthesis rate is seen in red light.
What is the best temp for photosynthesis?
The optimum temperature range for photosynthesis is 35–40ºC.
Does higher temperature increase photosynthesis?
Temperature. As with any other enzyme-controlled reaction, the rate of photosynthesis is affected by temperature. At low temperatures, the rate of photosynthesis is limited by the number of molecular collisions between enzymes and substrates. At high temperatures, enzymes are denatured .
What light intensity will maximize the rate of photosynthesis?
The wavelength of light is also important. PSI absorbs energy most efficiently at 700 nm and PSII at 680 nm. Light with a higher proportion of energy concentrated in these wavelengths will produce a higher rate of photosynthesis.
Do Plants take in more CO2 as light increases?
As the light intensity increases the rate of photosynthesis follows (point B on the graph). This means more carbon dioxide is being absorbed by the plant for photosynthesis. So this means more carbon dioxide uptake occurs.
Which light range is most effective in photosynthesis blue red green violet?
Red light is more effective in photosynthesis because both the photosystems (PS I and PS II) absorb light of wavelengths in the red region (680 and 700 nm, respectively). Furthermore, blue light is absorbed by carotenoids, which pass the energy to the chlorophyll. Light in the red region is absorbed by chlorophyll.
How do low light levels affect photosynthesis?
As light intensity increases, the photosynthetic rate increases until a point is reached where the rate begins to level off. At low light intensity, photosynthesis occurs slowly because only a small quantity of ATP and NADPH is created by the light dependent reactions.
What is the effect of light on the rate of photosynthesis?
Light is a limiting factor at low intensity. Thus the rate of photosynthesis increases with an increase in light intensity. High light intensities affect the rate of photosynthesis. It increases the temperature of the leaves. Therefore, rate of transpiration increases.
What are four things affect the rate of photosynthesis?
Factor Affecting Photosynthesis Light. It is one of the major factors affecting photosynthesis. Carbon Dioxide Concentration. The atmosphere contains 0.03% of carbon dioxide amidst other gases. Browse more Topics under Photosynthesis In Higher Plants Temperature. Water. Oxygen.
What are the factors affecting the intensity of light?
External factors: Light. Three characteristics of light (i) intensity (quantity). Temperature. Temperature in the range of 10-35 °C is optimum for photosynthesis. Carbon dioxide. Increase in carbon dioxide increases the rate of photosynthesis in most C3 plants. Oxygen. C3 plants show optimum photosynthesis at low oxygen concentration. Water.
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