Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in Elodea is native to North and South America  and is also widely used as aquarium vegetation. It lives in fresh water.
Adaptable to grade levels The student will: Observe evidence of photosynthesis in a water plant.
Assemble the equipment needed to measure the rate of photosynthesis in elodea water plant. Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis.
Change the conditions of photosynthesis by altering light intensity and carbon dioxide amount, and determine the effects on the photosynthesis rate. Prepare a graph of the collected data and analyze it. For each group of four students elodea water plant lamp 40 watt test tube razor blade single-edge dechlorinated water room temperature tape sodium bicarbonate powder baking soda clock or timer metal stand with rod or test tube rack metric ruler Strategy: Setting Up the Experiment 1.
Obtain a sprig of elodea. Remove several leaves from around the cut end of the stem. Slice off a portion of the stem at an angle and lightly crush the cut end of the stem. Place the plant into the test tube, stem end up, filled with water.
Secure the test tube to a metal stand with tape or place the test tube in a test tube rack.
Caption. Light micrograph of a cell from a leaf of Canadian pondweed, Elodea sp.. The tiny green particles within the cells are chloroplasts. These contain the green pigment chlorophyll and are the sites of cell photosynthesis. Brazilian elodea (Egeria densa; formerly Elodea densa) and Canadian waterweed are commonly used in schools as an experimental plant for demonstrating cellular structures, such as chloroplasts and nuclei, and oxygen production during photosynthesis. Assemble the equipment needed to measure the rate of photosynthesis in elodea (water plant). 3. Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis. 4. Change the conditions of photosynthesis by altering light intensity and.
Running the Experiment 1. Place a 40 watt lamp 5 cm from the plant. After one minute, count and record the number of oxygen bubbles rising from the cut end of the stem. Count bubbles for five minutes. If bubbles fail to appear, cut off more of the stem and recrush.
|Elodea | plant genus | srmvision.com||See Article History Alternative Titles: Elodea plants are native to the New World, though a number of species have established themselves as invasive species in ponds and quiet waterways.|
|Demonstrating Oxygen Evolution during Photosynthesis using Pondweed||Demonstrating Oxygen Evolution during Photosynthesis using Pondweed Demonstrating Oxygen Evolution during Photosynthesis using Pondweed Watching gas bubble up from a pondweed as it photosynthesises can be a great demonstration or student practical.|
Run a second five-minute trial. Record and average your results. Move the lamp so it is 20 cm from the plant. After one minute count and record bubbles for two five-minutes trials. Again, average and record your results.
Add a pinch of sodium bicarbonate powder to the test tube. Place the lamp 5 cm from the test tube. After one minute, record bubbles for two five- minute trials. Average and record your results.Elodea canadensis rapidly propagates through stem fragments dispersed by water currents, waterfowl and human activities, and flooding was the essential parameter of this expansion (Barrat-Segretain & Elger, ).
Fragments grow in a wide range of light conditions and only a very marked reduction in light levels was able to restrict the growth.
Oct 03, · A short clip of oxygen bubbles being produced from a photosynthesising aquatic plant. Elodea is native to North and South America and is also widely used as aquarium vegetation.
It lives in fresh water. The introduction of some species of Elodea into waterways in parts of Europe, Australia, Africa, Asia, and New Zealand has created a significant problem and it is Order: Alismatales. - The Limiting Effect of Light Intensity on Photosynthesis Aim: To investigate the limiting effect of light intensity on photosynthesis.
Prediction: I predict that as the light source (desk lamp) is moved closer to the pondweed (Elodea), the rate of photosynthesis will increase therefore more oxygen will be produced creating more bubbles.
Assemble the equipment needed to measure the rate of photosynthesis in elodea (water plant). 3.
Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis. 4. Change the conditions of photosynthesis by altering light intensity and. Demonstrating oxygen formation during photosynthesis can be a tricky process. One common way is to gather bubbles of gas given off by an aquatic plant.
This teaching resource introduces Cabomba, a pondweed which is much more effective than the traditional Elodea.