The effect of temperature on photosynthesis (again)..?

Question

Sorry, again.

I need to design a lab to perform regarding photosynthesis. I intend to find the effect of temperature on photosynthesis by measuring the CO2 released from an Elodea plant at different temperatures. I'm using two probes - temperature and CO2. The question is - how should I change the temperature? Would it work if I placed the plant in three beakers of water of different temperatures and measured the CO2 concentration from those?

Also, this experiment needs to be done in school.

Answer 1

Elodea is a water plant and most of the plant body is in the water. Briefly heating the water would not be effective as the water would rapidly cool down. Use an electric aquarium heater to maintain a steady selected temperature. Photosynthesis uses carbon dioxide and dissociated water (actually the hydrogen, the oxygen is mostly dumped), and sunlight to synthesize sugars. Measuring the amount of used carbon dioxide or the remaining carbon dioxide is not that easy. There will be carbon dioxide dissolved into the water as a small percentage solution of carbonic acid. Most of the oxygen is dumped by the plant but some of it is reused when the plant respires to produce energy for metabolism and catabolism. (like we do). The plant synthesises its sugars in order to eventually use them for metabolism and growth.
It would be easier to measure, before and after (the experiment), plant mass. Elodea grows in water and not soil. Your system is essentially a hydroponic one, so weighing each plant is easy.
The rate of photosynthesis could be indirectly measured as a function of the rate of growth. Make sure that all the plants each get the same amount of light.
Run the experimental design by your teacher, for his comments, before you set it up and run it.
You can show him my comments if you think that it would be of help.
Good luck.
Doc. Dan.

Answer 2

Photosynthesis is relatively a chemical reaction. With all chemical reactions, the better the temperature, the speedier the linked fee of reaction. Like somebody pronounced in the past, however, as quickly as you get above ninety tiers F, the linked fee of photosynthesis starts off to cut back as a results of fact the enzymes initiate breaking down (develop into denatured - a fancy way of asserting "cooked"). a normal t-try or F-statistic might easily describe this phenomenon statistically. A line graph might show this visually.