Limitation of alternative respiratory pathway activity in grapefruit flavedo tissue by oxygen availability

The capacity of the alternative respiratory pathway increased in the flavedo tissue of 'Marsh' grapefruit (Citrus paradisi Macf.) stored at 5°C for 2 weeks or longer. Elevated O2 levels during respiratory assays enhanced respiration by the tissue at 20°C but not at 5°C. At 20°C, salicylhyd...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1988-02, Vol.86 (2), p.623-625
Main Author: Purvis, A.C
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Azides
Biological and medical sciences
CITRUS PARADISI
Cyanide resistant respiration
Economic plant physiology
Fruits
Fundamental and applied biological sciences. Psychology
High temperature
Low temperature
Metabolism
Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia)
Nutrition. Photosynthesis. Respiration. Metabolism
OXIGENO
OXYGEN
OXYGENE
Photosynthesis, respiration. Anabolism, catabolism
Plant physiology and development
Plants
RESPIRACION
RESPIRATION
Respiratory rate
TEJIDO (ANATOMIA)
TISSU
TISSUES
Vapor phases
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Summary:The capacity of the alternative respiratory pathway increased in the flavedo tissue of 'Marsh' grapefruit (Citrus paradisi Macf.) stored at 5°C for 2 weeks or longer. Elevated O2 levels during respiratory assays enhanced respiration by the tissue at 20°C but not at 5°C. At 20°C, salicylhydroxamic acid alone was inhibitory to O2 uptake only in elevated O2. In conventional Warburg studies, alternative pathway respiration may be limited by the low solubility and/or slow rate of O2 diffusion into plant tissues, such as grapefruit flavedo, and may be responsible for the apparent low utilization of the alternative pathway potential observed in other studies.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.86.2.623