Substomatal cavity
Encyclopedia
In plants, the substomatal cavity is the cavity located immediately proximal to the stoma
. It acts as a diffusion chamber connected with intercellular air spaces and allows rapid diffusion
of carbon dioxide
and other gases (such as plant pheromones) in and out of plant cell
s.
Stoma
In botany, a stoma is a pore, found in the leaf and stem epidermis that is used forgas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the opening...
. It acts as a diffusion chamber connected with intercellular air spaces and allows rapid diffusion
Diffusion
Molecular diffusion, often called simply diffusion, is the thermal motion of all particles at temperatures above absolute zero. The rate of this movement is a function of temperature, viscosity of the fluid and the size of the particles...
of carbon dioxide
Carbon dioxide
Carbon dioxide is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom...
and other gases (such as plant pheromones) in and out of plant cell
Plant cell
Plant cells are eukaryotic cells that differ in several key respects from the cells of other eukaryotic organisms. Their distinctive features include:...
s.