Light-dependent reactions - Wikipedia, the free encyclopedia
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The light-dependent reactions , or light reactions , are the first stage of photosynthesis. In this process light energy is converted into chemical energy, in the form of the energy-carriers ATP a...
en.wikipedia.org/wiki/Light-dependent_reactions
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In the first route, electrons released from water in photosystem II (PSII) are eventually transferred to NADP+ by way of photosystem I (PSI)1. This linear electron flow is driven by two photochemical reactions that function in series.
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www.nature.com/nature/journal/v429/n6991/full/nature025...
www.nature.com/nature/journal/v429/n6991/full/nature02598.html
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in non-cyclic the electrons do not return the source and the cyclic the electrons come back to the source. Mostly the non-cyclic process occurs to produce ATP AND NADH which will be used by the calvin cycle to produce the carbohydrate but s...
http://wiki.answers.com/Q/What_are_the_differences_betw...
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The electron from Photosystem II replaces the excited electron in the P700 molecule. There is thus a continuous flow of electrons from water to NADPH. This energy is used in Carbon Fixation. Cyclic Electron Flow occurs in some eukaryotes and primitive photosynthetic bacteria.
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www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.ht...
www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html
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(d) Green plants employ two slightly different photosystems termed photosystem I and photosystem II, the former of which (photosystem I) is involved in both non-cyclic and cyclic electron flow...
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www.mansfield.ohio-state.edu/~sabedon/campbl10.htm
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In this study, we identified a novel NDH-related gene of Arabidopsis, NDH-dependent cyclic electron flow 5 (NDF5, At1g55370). Post-illumination increases in chlorophyll fluorescence were absent in ndf5 mutant plants, which indicated that NDF5 is essential for NDH activity.
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pcp.oxfordjournals.org/cgi/content/abstract/50/2/383
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This suggested that cyclic electron flow around PSI resulted in the formation of NPQ, which remained at higher levels in 2% O2. ... Ferredoxin Limits Cyclic Electron Flow around PSI (CEF-PSI) in Higher Plants--Stimulation of CEF-PSI enhances Non-Photochemical Quenching of Chl Fluorescence in Transplastomic Tobacco;
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pcp.oxfordjournals.org/cgi/content/abstract/43/9/1017
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While it is known that cyclic electron flow around photosystem I is an important pathway of photosynthetic electron transfer for converting light energy to chemical energy, some components of cyclic electron flow remain to be revealed.
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www.plantphysiol.org/cgi/doi/10.1104/pp.105.061549
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O 2 , ATP and NADPH ONLY ATP IS PRODUCED. NEITHER O2 NOR NADPH IS PRODUCED.
http://wiki.answers.com/Q/What_does_cyclic_electron_flo...
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