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Electron Transport Chain of Photosynthesis ..

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e Quesbank | Electron Transport Chain | Photosynthesis

Harbinson J and Foyer CH (1991) Relationships between the efficiencies of photosystem‐I and photosystem‐II and stromal redox state in carbon dioxide‐free air – evidence for cyclic electron flow in vivo. Plant Physiology 97: 41–49.

Electron Transport System - Unacademy


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Photosynthesis:
Cellular Respiration:
Photosynthesis: NADPH carries e- from light reaction to Calvin cycle
Cellular Respiration: NADH, FADH2 carry e- from glycolysis/Krebs cycle to electron transport chain

In this lesson, there is an overview of electron transport system

The structure of the electron transport systems linking the two photochemical systems is the main concern of the first part of the pres­ ent review.

Laisk A, Eichelmann H, Oja V, Rasulov B and Ramma H (2006) Photosystem II cycle and alternative electron flow in leaves. Plant and Cell Physiology 47: 972–983.

Heber U (2002) Irrungen, Wirrungen? The Mehler reaction in relation to cyclic electron transport in C3 plants. Photosynthesis Research 73: 223–231.

Electron transport in system two of photosynthesis …

Photosynthetic Electron Transport and ATP Synthesis

Cyclic electron transport is a light‐driven flow of electrons through a photosynthetic reaction centre with the electrons returning to the reaction centre via an electron transport pathway. Cyclic electron transport will normally generate an electrochemical potential (typically pH) gradient across a membrane but does not result in the net production of reductant. The pH gradient generated may drive the production of adenosine triphosphate (ATP) (cyclic photophosphorylation) or may regulate photosynthesis.

Pathways of higher plant photosynthetic electron transport. Higher plant photosynthetic electron transport takes place in the chloroplast in the thylakoid membrane. Linear electron transport starts with the light‐driven splitting of water by photosystem II (PSII), producing oxygen and electrons. These are transferred via plastoquinone (PQ) the cytochrome b/f complex (cyt ) and plastocyanin (PC) to photosystem I (PSI). PSI then reduces ferredoxin (Fd) in a second light‐driven reaction. Ferredoxin may reduce NADP to NADPH, catalysed by ferredoxin NADP oxidoreductase (FNR) or pass electrons back to PQ, probably via the cyt b/f complex. NADPH may be used to produce carbohydrate in the Benson–Calvin cycle or may reduce PQ, via an NADP–PQ oxidoreductase complex (ndh). Electron transport is coupled to the transfer of protons from the chloroplast stroma to the thylakoid lumen. These return to the stroma via ATP synthase, a process coupled to the synthesis of ATP. The pH gradient produced may also lead to downregulation of light harvesting by PSII – a process termed qE.

of photosynthetic electron transport
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    Get this from a library! Electron transport in system two of photosynthesis. [Martinus Petrus Johannes Pulles]

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    The relationship between photosynthesis and cellular respiration is such that the products of one system ..

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What would happen if the electron transport system in …

Harbinson J, Genty B and Baker NR (1989) Relationship between the quantum efficiencies of photosystem‐I and photosystem‐II in pea leaves. Plant Physiology 90: 1029–1034.

The function of cyclic electron transport in photosynthesis

Recent reviews of bacterial photosynthesis have come from Kondrat'eva ( 150) and Vernon (227), and Avron (13) has very recently completed a survey of electron transport in chloroplasts.

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