Question

Which of the following plants would be exhibiting the lowest rate of transpiration in the same place and at the same conditions?

• A. A plant with hypostomatic leaves.
• B. A plant with amphistomatic leaves.
• C. A plant with epistomatic leaves.
• D. A plant with astomatic leaves.

Answer 1

Answer: (D)

In plants, the transpiration occurs through stomata, lenticels and through cuticle. In plants with hypostomatic condition, the transpiration occurs more from the lower surface of the leaf. In plants with amphistomatic condition, the transpiration takes place equally from both the upper and lower surface. In plants with astomatic condition [Where stomata are absent], the transpiration can take place only through cuticle. Hence the rate of transpiration is lowest.