Question

Malate or K${}^{+}$ theory was put forward by

• A. Sayse.
• B. Steward.
• C. Schwender.
• D. Levitt.

Answer 1

The correct option is D Levitt.

Malate or $k^{+}$ ion pump hypothesis theory was put forward by Levitt $\left(1974\right)$. It is considered as the modern one. It states that the change in the turgor pressure of the guard cells regulates the opening and closing of stomata. It appears to be an active mechanism which needs ATP.