Chemical and physical properties of potatoes differing in bruise susceptibility
2004
Hironaka, K. (Obihiro Univ. of Agriculture and Veterinary Medicine, Hokkaido (Japan)) | Ishibashi, K. | Koaze, H. | Yasui, K. | Matsuda, K. | Sato, T. | Mori, M. | Tsuda, S. | Takada, A.
Chemical and physical properties of five cultivar potatoes were measured in order to explain the varietal differences in blackspot susceptibility. Bruise-resistant potatoes had lower polyphenol content and polyphenol oxidase activity, and higher failure stresses of both skin and underlying tissues than susceptible ones. In addition, there was a significant (p<0.05) relationship between bruise scores and skin failure stresses and it directly implied that the measurement of skin failure stress using a plunger is a useful method for screening potato varieties for blackspot susceptibility because of the ease of measurement.
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