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Respiration and the alternative oxidase
| Content Provider | Scilit |
|---|---|
| Author | Lambers, Hans |
| Copyright Year | 1997 |
| Description | Respiration consumes a major portion of the assimilates fixed in photosynthesis. It proceeds in both non-photosynthetic and photosynthetic organs, in the dark as well as in the light, albeit not necessarily at the same rate (Krömer, 1995). Respiration provides the energy to drive biosynthetic and transport processes in cells. Both NAD(P)H and ATP are end-products of respiration, which are subsequently used in numerous reactions. Most of the ATP derived from respiration is produced in the mitochondria, in a process which involves first the generation of a proton-motive force during electron transport from organic acids to oxygen and, second, the formation of ATP in a reaction which is driven by this protonmotive force. However, plant mitochondria also have respiratory electron transport pathways that allow the oxidation of organic acids to proceed without coupling to oxidative phosphorylation. First there is the rotenone-insensitive NADH dehydrogenase, a bypass of complex I. It catalyzes the transfer of electrons from NADH produced in the TCA cycle to ubiquinone (Q) without concomitant proton extrusion. Second, there is the cyanide-resistant, alternative pathway, which transfers electrons from ubiquinol (Qr, the reduced form of Q) to oxygen without coupling to proton extrusion. Book Name: A Molecular Approach To Primary Metabolism In Higher Plants |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2009-0-02577-X&isbn=9780429071393&doi=10.1201/b12538-24&format=pdf |
| Ending Page | 320 |
| Page Count | 15 |
| Starting Page | 306 |
| DOI | 10.1201/b12538-24 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 1997-08-08 |
| Access Restriction | Open |
| Subject Keyword | Book Name: A Molecular Approach To Primary Metabolism In Higher Plants Plant Sciences Phosphorylation Extrusion Respiration Alternative Proton Mitochondria Proceeds Oxygen |
| Content Type | Text |
| Resource Type | Chapter |
