OBJECTIVE FORESTRY

Detailed explanation-1: -Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing. Each guard cell has a relatively thick cuticle on the pore-side and a thin one opposite it.

Detailed explanation-2: -Stomatal guard cells also regulate water loss of plants via transpiration to the atmosphere. Signal transduction mechanisms in guard cells integrate a multitude of different stimuli to modulate stomatal aperture. Stomata open in response to light.

Detailed explanation-3: -The cells which surround a stomatal pore are Guard cells. Guard cells are a pair of cells that surround each stomata opening and regulate the rate of transpiration by opening and closing the stomata.