How does light intensity affect elodea?
How does light intensity affect elodea?
The rate of photosynthesis in Elodea depends on the intensity of light. With increasing, water pollution levels light that reaches aquatic plants such as Elodea significantly decreases thus leading to lesser light intensity underwater (Denchak, 2018).
How does light affect the rate of photosynthesis experiment?
More oxygen bubbles are produced when the light is closer to the beaker. So a greater light intensity gives a greater rate of photosynthesis.
What happens when elodea is grown in bright light?
High light intensities on elodea caused a discolorization of the chlorophylls in leaves, cessation of growth, and then death of the plant. measures that reduce light intensity will be only partially effective on elodea because of its low light requirements.
How do I find my compensation points?
There is an amount of light at which photosynthesis is just in balance with respiration. At this point, the rate at which respiration is producing CO2 is just balanced by the rate at which photosynthesis is using up CO2. This is the compensation point.
How do you vary light intensity in an experiment?
the light intensity is proportional to distance – it will decrease as the distance away from the bulb increases – so light intensity for the investigation can be varied by changing the distance from the lamp to the plant.
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.
Why does light increase the rate of photosynthesis?
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. At a very high intensity of light, the rate of photosynthesis would drop quickly as the light starts to damage the plant.
Do different colors of light affect the rate of photosynthesis experiment?
Different pigments absorb different wavelengths of light. The leaves of a plant are green because the chlorophyll within them absorb all other wavelengths of light and reflects green light….Effect of Light Colour on the Rate of Photosynthesis.
| Light Colour | Average Bubbles per minute ± 1 |
|---|---|
| Red Light | 42 |
| Yellow Light | 46 |
| Blue Light | 22 |
| Green Light | 16 |
What gas did the elodea plant give off in the light?
They produce carbon dioxide during cellular respiration. In this experiment, the student will place aquatic plants under different colors of light in a solution of bromothymol blue.
Does elodea plants give off carbon dioxide?
Snails will produce only carbon dioxide, while the Elodea will produce carbon dioxide and oxygen gas. Snails and Elodea will produce more carbon dioxide, causing the water to turn yellow. Adding the Elodea creates a symbiotic environment in which the snails can obtain oxygen from the Elodea.
What is the light compensation point and what happens at this point?
The light intensity at which the net amount of oxygen produced is exactly zero, is called the compensation point for light. At this point the consumption of oxygen by the plant due to cellular respiration is equal to the rate at which oxygen is produced by photosynthesis.
What affects light compensation point?
The compensation depth between photosynthesis and respiration of phytoplankton in the ocean must be dependent on some factors: the illumination at the surface, the transparency of the water, the biological character of the plankton present, and the temperature.
What was the purpose of the Elodea experiment?
The purpose of observing the change in oxygen production by Elodea when placed in direct white light, indirect white light, and darkness is to show how light is necessary to excite electrons and start photophosphorylation. A YUS-190-M Photosynthesis Apparatus was clamped horizontally onto a stand.
What kind of oxygen does Elodea produce in darkness?
Elodea produced approximately 90% less oxygen in darkness then light, and approximately 45% less oxygen in distant light.
How are air bubbles measured in an Elodea?
Once the Elodea formed a bubble of oxygen in the clear plastic tubing, the bubble was drawn into the measuring capillary located within the apparatus and measured. All the air bubbles produced were measured within one minute, and the sum of all the measurements within a minute was reported as mm/min.
What happens at the compensation point of light?
At the compensation point the net productivity is zero, and no growth can occur. There is a cool experiment, where you string bottles containing algae at different depths in a water body to measure the effect of diminishing light on productivity.