Discussion of all aspects of cellular structure, physiology and communication.
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What combination of environmental factors would produce an optimum rate of photosynthesis for most plants??
soil nutrition doesn't directly affect photosynthesis, trace minerals are needed but more doesn't boost photosynthesis rate.
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Photosynthesis is directly affected by environmental factors. The most obvious of these factors is light. In general, the rate of photosynthesis increases as light intensity increases, until the point of light saturation is reached. At that point, the rate of photosynthesis levels off.
Carbon dioxide concentration affects the rate of photosynthesis in a similar manner. Once a certain concentration of carbon dioxide is present, the reactions of photosynthesis can not proceed any further.
Photosynthesis also operates best within a certain range of temperatures.
Light, carbon dioxide concentration, temperature, and other environmental factors interact with one another to determine the optimum level of photosynthesis for a particular plant in its environment.
Depends on the type of plant. Plotting the intensity of photosynthesis with the amount of light will produce an optimal curve in the case of a C3 plant(after the optimum temperature, the intensity decreases - too much light inhibits photosynthesis) and a saturation plant in case of a C4 or CAM plant(after the optimum temperature, the intensity remains the same. the plant can protect itself from too much light). Also note an important difference between schiatophile and heliophile plants
An increase in CO2 concentration to 3% will be optimum for most plants. However, over 5% will inhibit photosynthesis(why, i don't know). Also note the fact that more CO2 in the atmosphere due to global warming will not be beneficial : the plant will produce more organic carbon but less organ nitrogen. Which sucks.
Temperature: also huge difference between C3 plants(optimum at 25 celsius), C4(optimum at 35-40) and CAM plants(around the same as C4 plants, but with the huge difference in physiology).
Water: also huge difference between C3 plants(which require a lot of water), C4(little water) and CAM(can survive with almost no water, like in deserts).
Any questions are welcome.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
7 posts • Page 1 of 1
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