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The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds. After a photon of light is absorbed by one of the many chlorophyll molecules, in one of the light-harvesting complexes of an antenna on photosystem II, some of the absorbed energy is transferred to the pair of chlorophyll molecules in the reaction center. After a photon of light is absorbed by one of the many chlorophyll molecules, in one of the light-harvesting complexes of an antenna on photosystem I, some of the absorbed energy is transferred to the pair of chlorophyll molecules in the reaction center. Proteolysis of the damaged D1 protein and re-assembly of a new D1 subunit in the Photosystem II following photoinhibition. Absorption and transfer of the energy absorbed from light photons between photosystem reaction centers. The light reactions of photosynthesis, which take place in photosystems II and I. Light energy is harvested and used to power the transfer of electrons among a series of electron donors and acceptors. The final electron acceptor is NADP+, which is reduced to NADPH. NADPH generated from light reactions is used in sugar synthesis in dark reactions. Light reactions also generate a proton motive force across the thylakoid membrane, and the proton gradient is used to synthesize ATP. There are two chemical reactions involved in the light reactions: water oxidation in photosystem II, and NADP reduction in photosystem I. The chemical reactions and pathways resulting in the formation of precursor metabolites, substances from which energy is derived, and any process involved in the liberation of energy from these substances. The chemical reactions and pathways by which individual cells transform chemical substances.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: photosynthesis, light harvesting
Acc: GO:0009765
Aspect: Biological Process
Desc: Absorption and transfer of the energy absorbed from light photons between photosystem reaction centers.
Synonyms:
  • energy dissipation
Proteins in PDR annotated with:
   This term: 8 [Search]
   Term or descendants: 21 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0009765 - photosynthesis, light harvesting (interactive image map)
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