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A process, occurring as part of photosynthesis, whereby light provides the energy for a series of electron carriers to operate together to transfer electrons and generate a transmembrane electrochemical gradient. Any process that stops, prevents or reduces the frequency, rate or extent of the chemical reactions and pathways by which individual cells transform chemical substances. Any process that stops, prevents or reduces the frequency, rate or extent of the light-dependent reaction of photosynthesis. The mechanism by which high light intensity inhibits photosynthesis through inactivation of the D1 protein of photosystem II. Any process that modulates the frequency, rate or extent of the light-dependent reaction of photosynthesis. 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. A change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a light intensity stimulus. A process whereby a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient. A change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a high light intensity stimulus.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: photoinhibition
Acc: GO:0010205
Aspect: Biological Process
Desc: The mechanism by which high light intensity inhibits photosynthesis through inactivation of the D1 protein of photosystem II.
Synonyms:
  • photosystem II inhibition
Proteins in PDR annotated with:
   This term: 9 [Search]
   Term or descendants: 9 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0010205 - photoinhibition (interactive image map)
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