What evidence supports the statement that the stomata are fully open at a light intensity of 30 kilolux?
Biology · High School · Tue Nov 03 2020
Answered on
High light intensity during growth increased the stomatal frequency but there were only small changes in the length of the stomatal pore. High-light leaves had more than twice as many stomata per unit area as low-light leaves. if light intensity is low then photosynthesis will be depressed: under these conditions it makes sense to close the stomata to conserve water.
The primary function of open stomata is to promote gas exchange in leaf tissue: atmospheric carbon dioxide is a substrate for photosynthesis. A side effect of opening the stomata is an increase of water loss through transpiration. If light intensity is low then photosynthesis will be depressed: under these conditions it makes sense to close the stomata to conserve water.