Impact of Oxygen Stress and Energy Availability on Membrane Stability of Plant Cells
| Autor: | André Rawyler, Silvio Arpagaus, Roland Braendle |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Nape
Membrane lipids Lipoxygenase Plants in Cold Climates and Waterlogged Soils Plant Science 580 Plants (Botany) Fatty Acids Nonesterified Nitrate Reductase Superoxide dismutase Lipid peroxidation chemistry.chemical_compound Adenosine Triphosphate Nitrate Reductases Superoxides Plant Cells medicine Anaerobiosis Energy charge Cells Cultured Phospholipids Solanum tuberosum chemistry.chemical_classification Reactive oxygen species Nitrates biology ATP synthase Superoxide Superoxide Dismutase Cell Membrane Hydrogen Peroxide Plants Catalase Oxygen Oxidative Stress medicine.anatomical_structure chemistry Biochemistry biology.protein Lipid Peroxidation Energy Metabolism Reactive Oxygen Species |
| Zdroj: | Rawyler, André; Arpagaus, Silvio; Brändle, Roland (2002). Impact of oxygen stress and energy availability on membrane stability of plant cells. Annals of Botany, 90(4), pp. 499-507. Oxford University Press 10.1093/aob/mcf126 |
| DOI: | 10.1093/aob/mcf126 |
| Popis: | This article reviews the relationship between the energy status of plant cells under O(2) stress (e.g. waterlogging) and the maintenance of membrane intactness. using information largely derived from suspension cultures of anoxia-intolerant potato cells. Energy-related parameters measured were fermentation end-products (ethanol, lactate, alanine), respiratory rate, ATP, adenylate energy charge. nitrate reductase activity and biomass. ATP synthesis rates were calculated from the first four parameters, Reactive oxygen species were estimated from H(2)O(2) and superoxide levels, and the enzymatic detoxification potential from the activity levels of catalase and superoxide dismutase. Structure-related parameters were total fatty acids, free fatty acids (FFAs), lipid hydroperoxides, total phospholipids, N-acylphosphatidylethanolamine (NAPE) and cell viability. The following issues are addressed in this review: (1) what is the impact of anoxia on membrane lipids and how does this relate to energy status: (2) does O(2) Per Se play a role in these changes; (3) under which conditions and to what extent does lipid peroxidation occur upon re-aeration and (4) can the effects of re-aeration be distinguished from those of anoxia? The emerging picture is a reappraisal of the relative contributions of anoxia and re-aeration. Two successive phases (pre-lytic and lytic) characterize potato cells under anoxia, They are connected by a threshold in ATP production rate, below which membrane lipids are hydrolysed to FFAs, and NAPE increases. Since lipid peroxidation occurs only when cells are reoxygenated during the lytic phase, its biological relevance in an already damaged system is questionable. (C) 2002 Annals of Botany Company. |
| Databáze: | OpenAIRE |
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