When temperatures are increased what generally happens to the rates of photosynthesis and respiration in plant...

When temperatures are increased what generally happens to the rates of photosynthesis and respiration in plant tissue?

In general, how much do respiration rates changes relative to a 10°C rise in temperature?

What is the relationship between leaf maturity and respiration rates?

Solutions

Expert Solution

At the compensation point, the rate of photosynthesis and respiration is the same. AT increased temperatures, the rate of photosynthesis increases. The higher the temperature, the greater the rate. However, the rate decreases then above 40 degrees.

At higher temperature, the solubility of carbondioxide is reduced and thus, it depends on the amount of CO2. The rate of respiration becomes slow at very high temperatures. At temperatures between 1 and 30 degrees the rate of respiration increases with temperature.

Metabolic processes such as respiration rate double after every 10 degree rise in temperature. This is observed only in the temperature between 1 and 30 degrees Celsius.

Leaf maturity or senescence has an effect on the rate of photosynthesis. Peisker et. Al has reported a decrease in the rate of respiration during the leaf maturity. This indicates that the rate of respiration slowly increases with leaf growth and gradually slows with leaf senescence.

gladiator answered 1 year ago

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