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Net photosynthesis



(1) The difference between the total amount of photosynthesis and the sum of the rates of respiration (i.e. photorespiration and dark respiration).

(2) The photosynthesis in excess of the respiratory demand.

(3) The rate of carbon fixation during photosynthesis minus the rate of carbon dioxide simultaneously lost during respiration.


Since photosynthesis and respiration occur simultaneously, a net photosynthesis results. Net photosynthesis may be represented by the following equation: net photosynthesis = gross photosynthesisrespiration.

Net photosynthesis can also be depicted as a measure of the oxygen released or a measure of the carbon dioxide uptake.

Synonym: apparent photosynthesis

Compare: gross photosynthesis

See also: photorespiration

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Stomata remain closed at night then respiration

1) They do not need to respire during night as there is no light, i.e. no photosynthesis. 2) see CAM plants http://en.wikipedia.org/wiki/Crassulacean_acid_metabolism

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by JackBean
Sun Nov 09, 2014 9:16 am
Forum: Physiology
Topic: Stomata remain closed at night then respiration
Replies: 4
Views: 1463

How much CO²/O² does lettuce consume/produce on average?

... I need an rough average on the following amounts using a single full-grown plant as reference in a 24h time span: ⋅  CO² consumption via photosynthesis ⋅  O² production via photosynthesis ⋅  H²O consumption via photosynthesis ⋅  CO² production via respiration ...

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by keks
Wed Jul 02, 2014 3:49 am
Forum: Botany Discussion
Topic: How much CO²/O² does lettuce consume/produce on average?
Replies: 0
Views: 945

Is it possible to study both photosynthesis and respiration

Can we study respiration and photosynthesis simultaneously?How to prove this?

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by kumar985
Mon Jun 02, 2014 1:16 pm
Forum: Physiology
Topic: Is it possible to study both photosynthesis and respiration
Replies: 0
Views: 888

Re: Transpiration and Photosynthesis.

Try to consider the light and dark reaction. A plant it active during the day and photosynthsise and in the process release excess H2O contents to the atmosphere (transpiration). So the phenomenom are complimentary.

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by perfection
Mon Apr 07, 2014 7:55 am
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 4
Views: 4320

Re: biology

Photosynthesis. All of the others release CO2 back again.

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by Babybel56
Thu Apr 03, 2014 3:28 pm
Forum: General Discussion
Topic: biology
Replies: 1
Views: 1821
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