Question

Active K+ ion-exchange mechanism of opening and closing of stomata was given by
A. Khorana
B. Scarth
C. Levitt
D. Kohli

Answer 1

The system of the closing and opening of the stomata relies on the presence of sugar and starch present in the guard cells. Because of the higher convergence of the cytoplasm of guard cells, the water goes into these cells from the neighboring cells as a natural by-product. Subsequently, the stomata stay open.

Complete step by step answer: Potassium is a significant macronutrient for plants. Potassium particles cause the turgor development of guard cells. An increase of potassium particles by guard cells causes an abatement in the water capability of guard cells which prompts inflow of water into the guard cells. This makes guard cells bloated and they swell. An increment in bloat of guard cells opens the stomatal pore. The development of potassium particles out from guard cells brings about an expansion in water potential, they lose water due to exosmosis, become limp and stomatal pore closes. This system of stomatal opening and closing was first expressed by Levitt.
Hence, option C is correct.

Note: Various components are answerable for the opening and closing of the stomata. The opening and closing rely on the turgor pressure in the guard cells. The growing of guard cells because the ingestion of water causes the opening of stomatal pores while contracting of guard cells shut the pores. The opening and closing of stomata happen because of turgor changes in guard cells. At the point when guard cells are bloated, the stomatal pore is open while in limp conditions, the stomatal gap closes. There are different hypotheses that clarify the opening and closing of the stomatal pore.