doi: 10.1104/pp.70.5.1413.
Mechanism of photoactivation of electron transport in intact bryopsis chloroplasts
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- PMID: 16662690
- PMCID: PMC1065898
- DOI: 10.1104/pp.70.5.1413
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Mechanism of photoactivation of electron transport in intact bryopsis chloroplasts
Plant Physiol.
1982 Nov.
Abstract
The mechanism of photoactivation of photosystem I electron transport was studied in intact Bryopsis corticulans chloroplasts. The evidence from chemical and photochemical studies suggests that photoactivation is a consequence of a reduction of an electron transport component, presumably ferredoxin-NADP(+) reductase. O(2) does not act as a mediator of the process but rather acts as an electron acceptor after photoactivation has occurred. We suggest that the initial function of the chloroplasts in a transition from dark to light is to initiate pseudocyclic electron flow.
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