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Photosynthesis

Definition

noun

The synthesis of complex organic material using carbon dioxide, water, inorganic salts, and light energy (from sunlight) captured by light-absorbing pigments, such as chlorophyll and other accessory pigments.


Supplement

Photosynthesis consists of light reactions and dark reactions. This process can be simplified in this equation: 6CO2+12H2O+energy=C6H12O6+6O2+6H2O. It means photosynthesis is a process in which carbon dioxide (CO2), water (H2O) and light energy are utilized to synthesize an energy-rich carbohydrate like glucose (C6H12O6) and to produce oxygen (O2) as a by-product.

Photosynthesis is a vital process among photoautotrophs, like plants, algae and some bacteria that are able to create their own food directly from inorganic compounds using light energy so that they do not have to eat or rely on nutrients derived from other living organisms. Photosynthesis occurs in plastids (e.g. chloroplasts), which are membrane-bounded organelles containing photosynthetic pigments (e.g. chlorophyll), within the cells of plants and algae. In photosynthetic bacteria (cyanobacteria) that do not have membrane-bounded organelles, photosynthesis occurs in the thylakoid membranes in the cytoplasm.


Word origin: from the Greek photo-, "light", and synthesis, "putting together".
Related forms: photosynthetic (adjective).

Compare: chemosynthesis.
See also: autotrophy.


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Results from our forum


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: 314

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: 457

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: 2722

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: 1296

biology

which process removes carbon dioxide out of the atmosphere? a) combustion b) decomposition c) photosynthesis d) respiration

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by geanna
Mon Mar 24, 2014 11:02 pm
 
Forum: General Discussion
Topic: biology
Replies: 1
Views: 1296
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