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In what way can the change in the size of the stomata in the presence of light also be a disadvantage to the plant?
Wiki User
∙ 7y ago
the gas exchange is prevented. it also limits the carbon supplies.
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoWhen water is in short supply it is advantageous for a plant to close its stomata because this stops transpiration and then the plant will not use as much water. However, this also has its disadvantages. Because there is no transpiration, water is moved up the xylem only by means of the positive pressure build up in the roots, a process that is much, much slower. Additionally, the plant can not get carbon dioxide form the air to use in photosynthesis and instead oxygen levels build up in the plant which, at high concentrations, can be harmful. Overall the disadvantages outweigh the advantages but plants have adapted other ways for dealing with water scarcity.
Wiki User
∙ 9y agoDuring scarcity of water in the plant the stomata remain closed. The signal for this closer is received from a plant growth regulator known as Abscisic acid.
Wiki User
∙ 7y agoIn light the stomata tend to open, allowing increased gas exchange and thus promoting photosynthesis. However, this also allows increased water loss by transpiration.
Wiki User
∙ 15y agotranspiration
Wiki User
∙ 13y agoIt will affect the gaseous exchange.
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What is a disadvantage of the change in size of stomata in the presence of light?
The rate of water loss will increase so it will be a disadvantage of the change in size of stomata in the presence of light.
Ingenhousz found that plants produce oxygen bubbles only in the presence of what?
Only in the presence of light
Light and carbon dioxide and what all affect the opening and closing of stomata?
Choloroplasts in the gaurd cell and availability of Water.
Why do some plants close their stomata at night?
At night, there is no light, therefore no photosynthesis (which is the process of making energy from light). Photosynthesis uses CO2, however since photosynthesis is not occurring at night, there is no need to acquire CO2.Some plants (CAM plants) only open their stomata at night, however, in order to take in CO2 and store it until it is light and they can use photosynthesis then. This helps to eliminate water loss through the stomata which would occur more rapidly if the stomata were open during a hot day. (therefore, most CAM plants are found in desserts and such)
What are the pores on leaves called?
These are known as stomata - pronounced stoh-muh-tuh ; the singular form is stoma.The are generally found on the underside of the leaves and sometimes along the stems; theyallow for gaseous exchange between the leaf and the atmosphere. Carbon dioxide in and water vapour and oxygen out (transpiration).They are normally on the underside of leaves as the waxy cuticle covers the upper epidermis; strangely some plants that are grown in tissue culture have stomata on both leaf surfaces, as a cuticle does not develop until the tissue culture plantlets are exposed to an open environment (and ultraviolet light).Plants growing in arid areas have fewer stomata to reduce transpiration where as plants in tropical areas have large or many stomata to take advanatge of the ideal growing conditions.
What is a disadvantage of the change in size of stomata in the presence of light?
The rate of water loss will increase so it will be a disadvantage of the change in size of stomata in the presence of light.
Which part of the plant takes in light and air?
The leaves through their stomata take air in.
What will happen if you put oil in a leaf and you expose it to sun light?
the stomata will get blocked
Ingenhousz found that plants produce oxygen bubbles only in the presence of what?
Only in the presence of light
Why do you think stomata shut at night?
To stop water loss from the plant. In the day light photosynthesis is taking place and carbon dioxide needs to be admitted into the stomata for this process. At night, no light, so plants, who lose water all day long, as it is replaced by the roots, shut the no longer needed stomata to conserve water.
Light and carbon dioxide and what all affect the opening and closing of stomata?
Choloroplasts in the gaurd cell and availability of Water.
What regulates the size of the stomata on a leaf?
The guard cells synthesize glucose through photosynthesis in the presence of light. as glucose accumulates, osmotic pressure increases and this enables them to draw water from adjacent epidermal cells by osmosis. this makes the guard cells turgid and the stomata opens. at night, there is no photosynthesis and therefore glucose levels go down leading to lowering of osmotic pressure. guard cells lose turgidity and become flaccid and therefore stomata closes. Am sure you can derive your answer from this.
Why does stomata close?
Due to loss in the turgor pressue of their gaurd cells in the absence of light
Why do some plants close their stomata at night?
At night, there is no light, therefore no photosynthesis (which is the process of making energy from light). Photosynthesis uses CO2, however since photosynthesis is not occurring at night, there is no need to acquire CO2.Some plants (CAM plants) only open their stomata at night, however, in order to take in CO2 and store it until it is light and they can use photosynthesis then. This helps to eliminate water loss through the stomata which would occur more rapidly if the stomata were open during a hot day. (therefore, most CAM plants are found in desserts and such)
What does light represent?
The light represents God and his presence.
What conditions must be present for light-independent reactions to occur?
Two condition that must be present for light independent reactions to occur is the presence of CO2 and the presence of ribulose bisphosphate. Two other conditions include the presence of ATP and NADPH and the presence of required enzymes.
How stomata reacts with water?
When light hits the stomata it activates photosynthetic K+ pumps. These cells pump potassium ions into the guards cell around the stomata. Water is attracted to the potassium ions and thus enters the guards cells. This causes the guard cells to swell, but the rigidity of the one side causes that side to bow inwards, this creates an opening for gases to exchange in the leaf. This opening is the stomata. When water is not present, the stomata will not open.
