I believe this will happen because when the light source is nearer to the plant more of the plants surface area is coming in to contact with the light from the desk lamp therefore more photosynthesis will occur which will mean more oxygen will be produced which will create more bubbles....
The word equation for photosynthesis is: Light [IMAGE]Carbon Dioxide + Water Glucose + Oxygen Chlorophyll Although most of the glucose produced is converted into insoluble starch for storage in the stem, leaves or roots, some is used immediately by the plant to provide via respiration....
I think this because the plant may use up all of the carbon dioxide (Sodium hydro carbonate) and the plant can have as much light as it needs but if it does not have any carbon dioxide it will not be able to photosynthesise....
Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise.
It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .
Both types of photosystem come together in green plants, algae and cyanobacteria to perform a particularly complex form of photosynthesis—oxygenic photosynthesis—that produces energy (in the form of ATP and carbohydrates) as well as oxygen, a byproduct toxic to many cells. The remaining photosynthetic organisms, all of which are bacteria, use only one type of reaction center or the other.
Introduction: "Photosynthesis is the conversion of light energy to chemical energy that is stored in glucose or other organic compounds; it occurs in plants, algae, and certain prokaryotes" (Campbell, G-16).
At first, most scientists did not believe that all the reaction centers found in photosynthetic organisms today could possibly have a single common ancestor. True, all reaction centers harvest energy from light and lock it into compounds in a form that’s chemically useful to cells. To do this, the proteins pass electrons along a transfer chain of molecules in a membrane, as though skipping along a series of stepping stones. Each step releases energy that’s ultimately used down the line to make energy-carrier molecules for the cell.
When photosynthesis takes place, plants use the suns energy to combine carbon dioxide from the air with water from the soil to create glucose (a carbohydrate)....
The latest important clue comes from Heliobacterium modesticaldum, which has the distinction of being the simplest known photosynthetic bacterium. Its reaction center, researchers think, is the closest thing available to the original complex. Ever since the biologists , and of Arizona State University, in collaboration with their colleagues at Penn State, published in a July edition of Science, experts have been unpacking exactly what it means for the evolution of photosynthesis. “It’s really a window into the past,” Gisriel said.
Heliobacteria have perfectly symmetrical reaction centers, use a form of bacteriochlorophyll that’s different from the chlorophyll found in most bacteria, and cannot perform all the functions that other photosynthetic organisms can. For instance, they cannot use carbon dioxide as a source of carbon, and they die when exposed to oxygen. In fact, their structure took nearly seven years to obtain, partly because of the technical difficulties in keeping the heliobacteria insulated from oxygen. “When we first started working on it,” Redding said, “we killed it more than once.”
To that end, they have turned their attention to existing organisms. By studying the molecular details of the reactions that green plants, algae and some bacteria use to photosynthesize, and by analyzing the evolutionary relationships among them, scientists are trying to piece together a cogent historical narrative for the process.
Scientists want to figure out what made that possible. In its current form, the machinery that converts light energy to chemical energy in photosynthesis—a protein complex called a reaction center—is incredibly sophisticated. The evidence suggests, however, that its design, which stretches back almost to the root of the tree of life, was once very simple. Researchers have been trying for decades to fill that enormous gap in their understanding of how (and why) photosynthesis evolved.
Photosynthesis directly or indirectly powers and sustains almost every organism on Earth. It is responsible for the composition of our atmosphere and forms the foundation of the planet’s many interwoven ecosystems. Moreover, as , a biologist at the French National Center for Scientific Research in Paris, noted, photosynthesis liberated cells to grow and evolve boundlessly by letting them derive energy from a new, inexhaustible, nonterrestrial source. “When photosynthesis entered the picture, life connected up to the cosmos,” he said.