Answer:
Opening and Closing of
Stomata Opening and closing of stomata is an important event in the process of
photosynthesis. Along with gaseous exchange, larger amount of water can also be
lost through stomata. So, plants close stomata when they does not need carbon
dioxide. Each stoma is bounded by two kidney-shaped guard, cells.
The opening and
closing of stoma is resulted due to the change in the turgidity of these guard
cells. When the guard cells take up water and become turgid, the stoma opens
and when guard cells lose water and shrink, it closes.
(a)
Open and (b) closed stomatal pore
The ends of
the two guard cells are joined and thin outer wall bends more readily than the
thick inner one. These play an important part in opening and closing of stomata
pore,
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