title: Salt hardiness and dye reduction by potato tissue and mitochondrial fractions as influenced by previous storage of the tubers.
abstract: Oxygen uptake and tetrazolium reduction occurred at higher rates in discs from potato tubers (Solanum tuberosum L.) stored at 0 degrees than in discs from tubers stored at 12.8 degrees . Tetrazolium reduction was at a higher rate in mitochondrial fractions from tubers stored at 0 degrees than in mitochondrial fractions from tubers stored at 12.8 degrees . These physiological activities were more resistant to hypertonic KCl treatments in tissue and mitochondrial fractions from tubers stored at 0 degrees than in tissue and mitochondrial fractions from tubers stored at 12.8 degrees . Inhibition of O(2) uptake and tetrazolium reduction progressively increased with increasing concentrations of KCl for tissue and mitochondrial fractions from tubers stored at 0 and 12.8 degrees , but inhibition was more severe and occurred at lower concentrations of KCl for the material from tubers stored at 12.8 degrees . Tissue from tubers stored at 0 degrees was at the same time more sensitive to hypotonic solutions and more resistant to hypertonic solutions than corresponding tissue from tubers stored at 12.8 degrees . Adaptive changes brought on in the tubers by the stress of cold storage were demonstrated in the discs and mitochondrial fractions prepared from cold-stored tubers.
authors.affiliation: Agricultural Research Service, United States Department of Agriculture, Pomona, California 91769.
authors.forename: C C
authors.initials: CC
authors.lastname: Craft