Open WL Archief (OWA)

Over het archief

Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.

Basisinformatie over ‘Open Access to scholarly information'.

[ meld een fout in dit record ]

mandje (1): toevoegen | toon

---

one publication added to basket [123158]

Alternative photosynthetic electron flow to oxygen in marine Synechococcus Bailey, S.; Melis, A.; Mackey, K.R.M.; Cardol, P.; Finazzi, G.; van Dijken, G.; Berg, G.M.; Arrigo, K.R.; Shrager, J.; Grossman, A. (2008). Alternative photosynthetic electron flow to oxygen in marine Synechococcus. Biochim. Biophys. Acta Bioenerg. 1777(3): 269-276. dx.doi.org/10.1016/j.bbabio.2008.01.002 In: Biochimica et Biophysica Acta - Bioenergetics. Elsevier: Amsterdam. ISSN 0005-2728; e-ISSN 1879-2650, meer

---

Beschikbaar in	Auteurs
VLIZ: Non-open access 135891 [ aanvragen ]

---

Trefwoorden

Agents > Inhibitors > Enzyme inhibitors Chemical elements > Metals > Transition elements > Heavy metals > Iron Chemical elements > Nonmetals > Atmospheric gases > Oxygen Chemical reactions > Photochemical reactions > Photosynthesis Environments > Aquatic environment > Marine environment Enzymes > Oxidoreductases Seawater Bacillariophyceae [WoRMS]; Cyanobacteria [WoRMS]; Synechococcus Nägeli, 1849 [WoRMS] Marien/Kust

---

Auteurs		Top
Bailey, S. Melis, A. Mackey, K.R.M. Cardol, P., meer	Finazzi, G. van Dijken, G. Berg, G.M.	Arrigo, K.R. Shrager, J. Grossman, A.

---

Abstract

Cyanobacteria dominate the world's oceans where iron is often barely detectable. One manifestation of low iron adaptation in the oligotrophic marine environment is a decrease in levels of iron-rich photosynthetic components, including the reaction center of photosystem I and the cytochrome b6f complex [R.F. Strzepek and P.J. Harrison, Photosynthetic architecture differs in coastal and oceanic diatoms, Nature 431 (2004) 689-692.]. These thylakoid membrane components have well characterised roles in linear and cyclic photosynthetic electron transport and their low abundance creates potential impediments to photosynthetic function. Here we show that the marine cyanobacterium Synechococcus WH8102 exhibits significant alternative electron flow to O2, a potential adaptation to the low iron environment in oligotrophic oceans. This alternative electron flow appears to extract electrons from the intersystem electron transport chain, prior to photosystem I. Inhibitor studies demonstrate that a propyl gallate-sensitive oxidase mediates this flow of electrons to oxygen, which in turn alleviates excessive photosystem II excitation pressure that can often occur even at relatively low irradiance. These findings are also discussed in the context of satisfying the energetic requirements of the cell when photosystem I abundance is low.

---

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid

Top | Auteurs

IMIS is ontwikkeld en wordt gehost door het VLIZ.