Guard Cells

GUARD CELLS
Location
curb cells are located in the lower epidermis in a plant leaf. They edge a pore called pore.
WHY DO YOU THINK ITS AT THE LOWER SURFACE OF THE LEAF
Because the stoma dont want to remain opened too long for the panic of losing too much weewee , but dont want to be remained close too long because they deal CO2, therefore, being at the bottom allows them to stay open as much as they can without losing water from the heat .
Function
Guard cells surround the stoma (pores). They are responsible for opening and remnant the stomata to regulate the rate of transpiration.
* Structures of the ward cells
* Thick cell wall
* versed wall
* Contain chloroplasts
* Have a nucleus

How do these structures garter ?
* At day light, potassium concentration increases . Therefore, water electric potential decreases.
* From that, water should enter the guard cells by osmosis by the financial aid of epidermal cells that surround the guard cells .




* Pressure increases, but the onerousness OF ITS INNER WALL doesnt allow the guard cell to expand , instead the guard cell becomes large , and it causes the cell to curve from its oppressiveness , so that the stoma is opened .
And when its dark
The opposite happens
A. Potassium concentration decreases, water potential increases.
B. Water goes out of the cell by osmosis, the crush then falls , leaving the cell flaccid , so the cell shrinks. Due to that, the stoma closes
The other structures of the guard cell are present in any other cell, so these structures doesnt make the guard cell specialized. Only the thickness of its wallIf you want to get a full essay, order it on our website: Ordercustompaper.com



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