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Transpiration

Definition

noun

(physics) The passage of gases through fine tubes or through a porous substance.

(botany) The loss of water by evaporation in terrestrial plants, especially through the stomata (accompanied by a corresponding water uptake from the roots); a process in which the water vapor escapes through the plant via its stomata and lenticels into its external environment (atmosphere).

(animal physiology) The process of giving off water vapour through the skin or mucous membranes; also sometimes referred to as sweating, which is the evaporation of water together with a small amount of sodium chloride via the sweat glands of the skin.


Supplement

In plants, transpiration is important as it cools plants and enables mass flow of mineral nutrients and water from roots to shoots.

In animals, the process is sometimes called perspiration or sweating.


See also: evapotranspiration, perspiration.


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Results from our forum


Transpiration and Photosynthesis.

... is crowded, I'm sure the metabolism doesn't significantly influence concentration of water. Shouldn't be the question the other way - how does transpiration affect photosynthesis?

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by JackBean
Fri Mar 14, 2014 10:34 am
 
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 3
Views: 375

Transpiration and Photosynthesis.

... water can evapourate (transpire). So if there are low levels of photosynthesis (say, at night) then there will also be relatively low levels of transpiration. The water just cannot get out. However if the pores are left open a much greater volume of water can be lose this way. You can therefore ...

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by Babybel56
Fri Mar 14, 2014 4:07 am
 
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 3
Views: 375

Transpiration and Photosynthesis.

How does Photosynthesis affect Transpiration?

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by harryriley88
Thu Mar 13, 2014 10:12 pm
 
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 3
Views: 375

How to calculate the transpiration rate based on exp. data

Previously I had conducted an experiment to study the effect of light intensity on the rate of transpiration of plant. Here are the data obtained. My problem is how can I calculate the transpiration rate which end up with a unit of " g/cm2/minute " ? The type ...

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by tancheeping
Mon Dec 09, 2013 12:49 pm
 
Forum: Botany Discussion
Topic: How to calculate the transpiration rate based on exp. data
Replies: 0
Views: 485

Re: Transpiration Please help Me

Transpiration is a passive process. What has not being taken into account is the primary reason why the stomata open and close. Stomata open and close to allow gas exchange for photosynthesis to occur. It lets carbon dioxide ...

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by daddyjames
Sun Oct 14, 2012 2:34 pm
 
Forum: Botany Discussion
Topic: Transpiration Please help Me
Replies: 29
Views: 25450
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