Respiratory Metabolism of Aerated Potato Disks

Genetic modification of respiratory capacity in potato.

Mitochondrial respiration was altered in transgenic potato (Solanum tuberosum) lines by overexpression of the alternative oxidase Aox1 gene. Overexpressing lines showed higher levels of Aox1 mRNA, increased levels of alternative oxidase protein(s), and an unusual higher molecular weight polypeptide, which may be a normal processing/modification intermediate. Evidence suggests that the alternati...

Transport and metabolism of raffinose family oligosaccharides in transgenic potato.

Raffinose family oligosaccharides (RFOs) are involved in the storage and transport of carbon and serve as compatible solutes for protection against abiotic stresses like drought or cold. RFOs are usually transported in plant species that load sugars symplastically into the phloem. Loading probably occurs by a polymer trapping mechanism which establishes a concentration gradient of assimilates b...

Determining Factor in the Respiration of Potato Disks of Varying Thickness

Suimiiary. The effect of temperature on the respiration rate of potato tuber slices has been analyzed in terms of the Arrhenius equation. Freshly cut disks, irrespective of thickness, show a linear response to increasing temperature up to 300 with an activation energy (E) of approximately 12.0 Kcal. Aged disks less than 1.0 mm thick also give a linear response with E similar to that of fresh di...

Oxygen tension a determining factor in the respiration of potato disks of varying thickness.

The effect of temperature on the respiration rate of potato tuber slices has been analyzed in terms of the Arrhenius equation. Freshly cut disks, irrespective of thickness, show a linear response to increasing temperature up to 30 degrees with an activation energy (E) of approximately 12.0 Kcal. Aged disks less than 1.0 mm thick also give a linear response with E similar to that of fresh disks....

Lung metabolism during ventilator-induced lung injury: stretching the relevance of the normally aerated lung*.