Investigating the light dependent reaction in photosynthesis
Record or report findings.
Rate of photosynthesis (measured by ET50, time it took for 50% of the leaf disks to float up)
Color of light (wavelength of light)
Light intensity, temperature, bicarbonate concentration (0.2%), depth of bicarbonate solution, direction of incoming light, pH, amount of soap, size of leaf disk, type of plant
Ten trials for each color, however for each trial, a few disks did not float up.
Photosynthesis Lab | Photosynthesis | Light
Follow in the steps of van Helmont, John Woodward, Joseph Priestley and Jan Ingenhousz and discover photosynthesisIs plant growth affected by exposure to ultraviolet light?
Some plants and plantlike organisms have developed other pigments to compensate for low light or poor use of light. Cyanobacteria and red algae have phycocyanin and allophycocyanin as accessory pigments to absorbe orange light. They also have a red pigment called phycoerythrin that absorbs green light and extends the range of photosynthesis. The red pigment is found in vegetables. Some red algae are in fact nearly black, so that increases their photosynthetic efficiency. Brown algae have the pigment fucoxanthin in addition to chlorophyll to widen their absorption range. These red and brown algae grow to depths around 270 meters where the light is less than 1% of surface light.
light reaction in photosynthesis diagram - …
Our results show that different color lights definitely does have a strong direct correlation with the rate of photosynthesis/growth of a plant.
LIGHT ABSORPTION IN PHOTOSYNTHESIS
Absorption spectra showing how the different side chains in chlorophyll a and chlorophyll b result in slightly different absorptions of visible light.
Photosynthesis dictionary definition | photosynthesis …
On the Y-axis is the free energy of electrons, while on the X-axis is the progression of the electrons through the light reactions .photosynthesis, Light energy is absorbed by the green chemical chlorophyll.
Photosynthesis Science Fair Projects and Experiments
The Effects of Elevated Carbon Dioxide Levels on the Transpiratoin Rates of Zonal Geranium PlantsHow Does the Introduction of NaF Affect the Rate of Photosynthesis in Isolated Chloroplasts?
photosynthesis notes - Biology Junction
In the interest of genetic engineering and agricultural applications, the authors analyze the relative importance of genes that control both metabolic and light reactions as well as the structure, arrangement, and orientation of photosynthesis.
The Discovery of Photosynthesis
The plant responded to the different colored light as follows: The rate of photosynthesis was the most successful in white light, and more successful in red and blue lighting, than in green and yellow lighting systems.
Photosynthesis - Song with Free Worksheets and Activities
One possible explanation for our results is that due to the high-energy nature of blue light, some of the blue light shining onto the juniper needles is absorbed by plant pigments other than the chlorophylls and is not transferred to the photosynthetic reactions.