Ratio of absorbed photons:electrons:H+ in photochemical reaction

Range 2 absorbed photons: 1 electron: 3 H+
Organism Generic
Reference John A. Raven Functional evolution of photochemical energy transformations in oxygen-producing organisms, Functional Plant Biology, 2009, 36, 505–515 p.505 left column top paragraph
Primary Source Allen JF. Cyclic, pseudocyclic and noncyclic photophosphorylation: new links in the chain. Trends Plant Sci. 2003 Jan8(1):15-9. AND Allen JF. Cytochrome b6f: structure for signalling and vectorial metabolism. Trends Plant Sci. 2004 Mar9(3):130-7 AND Falkowski PG, Raven JA (2007) ‘Aquatic photosynthesis, 2nd edn’. (Princeton University Press: Princeton)PubMed ID12523995, 15003236
Method These organisms that use water as their electron donor use two photochemical reactions in series (Hill and Bendall 1960) to move electrons to NADP+ and then to CO2, and pump H+ across the photosynthetic membrane: the ratio of absorbed photons used : electrons :H+ is 2 : 1 : 3 (Allen 2003, 2004 Falkowski and Raven 2007).
Comments See BNID 104649
Entered by Uri M
ID 105037