what is the effect of high or low temperatures on the rate of photosynthesis?

Answer 1

Under both the circumstances the photosynthesis will be adversely affected because of several variables being affected by the abnormal rise and fall in temperature.

Answer 2

Photosynthesis is basically a chemical reaction. With all chemical reactions, the higher the temperature, the faster the rate of reaction. Like someone stated earlier, though, once you get above 90 degrees F, the rate of photosynthesis starts to decrease because the enzymes start breaking down (become denatured - a fancy way of saying "cooked"). A simple t-test or F-statistic would easily describe this phenomenon statistically. A line graph would demonstrate this visually.

Answer 3

Not a simple answer for that one.
If you talking about terrestrial plants, the higher the T, the more photons/Area are striking the leaves to the limit of the photosynthetic enzymes. Terrestrial limit being the T at which denaturing of proteins begin.
If you are talking about aquatic plants, the higher the T, the lower the concentration of dissolved gases, including CO2 and O2. As T increasing, photosynthesis rates decrease with the concentrations of the dissolved gases.

Answer 4

high temperature means low photosynthesis