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The stomata in the surface of a plant open during daylight (for most plants) and allow CO2 to be absorbed and O2 released. These gases just diffuse to and from the air via the stomata, but are reacted within the interior of the plant.
[Some desert plants have their stomata closed during the day, to conserve water. They open their stomata at night, and store CO2 in a special chemical, then close the stomata during the day, but still use the sunlight to convert the CO2 into sugars and starches.]
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoOpening: Trigger by sunlight or low CO2 within the plant cell.
1. It is initiated by a proton pumping ATPase pumping H+ out of the guard cell plasma membrane.
2a. This pumping hyperpolarises the guard cells causing voltage gated influx channels to opening, allowing K+ and Cl- to move into the guard cells.
2b. Phosphoenol pyruvated is carboxylated to form malic acid
3. The solute potential of the guard cells decreases because of the K+ Cl- and Malic acid accumulation.
4. Water then flows into the guard cells down a water potential gradient which then increases the turgor of the cell (psi w = psi p - psi s)
5. Increased tugor pushes the guard cells apart opening the stomata pore.
Closing: Triggered by darkness, water stress, abscisic acid (ABA) and high CO2 within the plant cell.
1: Proton pumping ATPase stops pumping H+. H+ is now accumulated within the guard cells again.
2: The voltage gated influx channels on the guard cells close stopping the movement of K+ and Cl- into the guard cells. Malic acid is also no longer made.
3: The solute potential of the guard cells increases as the left over K+ Cl- and malic acid is used up.
4: Water flows out of the guard cells along the reversed water potential gradient and the turgor of the guard cells decrease.
5: Due to the decreased turgor the guard cells become flaccid and the stomta pores close.
Wiki User
∙ 13y agoit release excess mater from the leaves of the plant
Wiki User
∙ 11y agoIt is the opening through which CO2(Carbon Dioxide) enters the leaf through STOMATA
Wiki User
∙ 14y agoit is affected by several fa
ctors
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What ions involve the opening and closing of stomata?
Potassium ions, they contribute to the control of turgidity of guard cells, and thus the opening and closing of stomata.
Which leaf cells control the opening of the stomata?
one leaf cell is the air
What is the openings on the underside of leaves?
stomata =Specialized passages through the cuticle that enable plants to exchange gases.
Do all plants have the same amount of stomata?
No, not all plants have the same number of stomata. Stomata numbers vary among different plant species and can be influenced by environmental factors.
Where are stomata located on a leaf and what do they do?
Stomatas are located on the bottom of a leaf. This depends if it is awater plantbecausethen their stomatas will be on the top so that the gasexchangecould happen. Stomatas are through what a plant.The word stomata means "mouth" in Greek because they allow communication between the internal and external environments of the plant and Their main function is to allow gases such ascarbon dioxide, water vapor and oxygen to move rapidly into and out of the leaf.
What is the function of a guard cell and when they open?
To regulate opening and closing of stomata
What is the small opening under a leaf called?
Stomata
What is the main function of mesophyll tissue of leaves?
a. conduction of substance b.regulation of opening and closing stomata c. photosynthesis
What ions involve the opening and closing of stomata?
Potassium ions, they contribute to the control of turgidity of guard cells, and thus the opening and closing of stomata.
What is the cells function to open and close stomata?
Guard cells are responsible.There two hypothesis explaining opening and closing of stomata. 1.sugar-starch hypothesis 2.potassium ion hypothesis
What is the function of a guard cell in plants?
The function of the guard cells are that they help to regulate the rate of transpiration by opening and closing the stomata thus preventing excessive water loss.
Does a Stomata control opening and closing of the openings in the leaf?
A stomata is the openings in the leaf.
What is a sentence for the word stomata?
A stomata is an opening allows gases to come through.
What is the opening in a plants leaf?
Stomata
What is the use of stomata?
Stomata for plural, and stoma for singular... Stoma/stomata is a guard cell and it also serves as an opening. source: Biology class... ^^,
What is the stomata's function?
The function of stomata is that they are small openings or pores on the surface of leaves.The function of stomata is to allow gases such as oxygen, water vapor, and carbon dioxide to move around the leaf.
What is the opening that allow for gas exchange?
stomata
