Solanum tuberosum temperatures

Because yams are stored in open systems at ambient temperatures (usually warm), tuber tissue was examined for proteinase activity at 40°C. Some tubers had high apparent polyphenol oxidase activity upon peeling of the tubers (tissue turned deep purple at the peeled surface) so that PYP was added to extracts to combine with polyphenolic compounds and protect the proteinase from reacting with these compounds. Earlier studies had shown some inhibition of alkaline proteinase activity by ferric ion (24) so that EDTA was also added to the extracts to chelate any free iron. Two alkaline pH optima were found, at 9.0 and 10.5. The alkaline proteinases of white potatoes (Solanum tuberosum) have pH optima between 8.6 and 9 (25) and those of Carilla chocola tubers have pH optima between 8.0 and 9.5 (26,27T, suggesting that alkaline... 

Blenkinsop, R. W., Copp, L. J., Yada, R. Y, Marangoni, A. G. (2002). Changes in eompositional parameters of tubers of potato (Solanum tuberosum) during low-temperature storage and their relationship to ehip proeessing quality. Journal of Agricultural and Food Chemistry, 50,4545 553. 

Carputo, D., Cardi, T., Palta, J. P, Sirianni, P, Vega, S., Fruseiante, L. (2000b). Toleranee to low temperatures and tuber soft rot in hybrids between Solanum commersonii and Solanum tuberosum obtained through manipulation of ploidy and endosperm balanee number (EBN). Plant Breeding, 119, 127-130. 

Kaur, L., Singh, J., Singh, N., Ezekiel, R. (2007). Textural and pasting properties of potatoes (Solanum tuberosum L.) as affected by storage temperature. J. Sci. FoodAgric., 87, 520-526. 

Chuda, Y, Ono, H., Yada, H., Takada, A. O., Endo, C. M., Mori, M. (2003). Effects of physiological changes in potato tubers (Solanum tuberosum L.) after low temperature storage on the level of acrylamide formed in potato ehips. Biosci Biotechnol Biochem., 67(5), 1188-1190. 

Griffiths, D. W., Bain, H., Dale, M. F. (1997). The Effeet of Low-Temperature Storage on the Glyeoalkaloid Content of Potato (Solanum tuberosum) Tubers. Journal of Science of food and Agriculture, 74(3), 301-307. 

Ku, S. B., Edwards, G. E., Tanner, C. B. (1977). Effects of light, carbon dioxide, and temperature on photosynthesis, oxygen inhibition of photosynthesis, and transpiration in Solanum tuberosum. Plant Physiol, 59, 868-872. 

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