Protection of photosynthetic O2 evolution against heat inactivation: the role of chloride,pH and coupling status |
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| Authors: | Christa Critchley Renu Khanna Chopra |
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| Institution: | (1) Botany Department, The Faculties, Australian National University, GPO Box 4, 2601 Canberra, ACT, Australia;(2) Water Technology Centre, Indian Agricultural Research Institute, 110012 New Delhi, India |
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| Abstract: | Heat inactivation of photosynthetic O2 evolution was studied in isolated thylakoids from spinach (Spinacia oleracea) and mangrove (Avicennia marina) leaves. Different temperatures, salt, pH and uncoupler effects were investigated. From these results and others in the literature it was concluced that chloride loss from the membrane and, more specifically, the oxygen-evolving complex of photosystem II, may be the cause of inhibition of oxygen evolution during heat inactivation.Abbreviations Hepes
4-(2-hydroxyethyl)-1-piperazinethanesulfonic acid
- Tris
2-amino-2-(hydroxymethyl)-1,3-propanediol
- Tricine
N-2-hydroxy-1, 1-bis (hydroxymethyl) ethyl glycine
- EDTA
ethylenediaminetetraacetic acid
- FeCN
K-ferricyanide |
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| Keywords: | Avicennia marina chloride heat inactivation photosynthetic oxygen evolution pH effect Spinacia oleracea |
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