American Journal of Potato Research

, Volume 78, Issue 5, pp 389–394 | Cite as

Comparison of Two Methods For Determining the Discoloration Potential of Potato Tubers Based on Their Chemical and Biochemical Properties

  • Efren Delgado
  • Jaroslaw Poberezny
  • Elke Pawelzik
  • Ilona Rogozinska
Short Communication


The aim of this study was to compare the homogenization and visual methods that are used to determine the discoloration potential of potato tubers. Two German cultivars, Agria and Satina, and two Polish cultivars, Lena and Mors, were planted during 1998 and 1999 in Goettingen, Germany, and in Bydgoszcz, Poland. The discoloration potential of the tubers was measured after harvesting and after 6 months of storage at 4 C and 8 C. Both methods correlated significantly at harvest (0.709,P < 0.001). After storage the correlation was significant but low (r = 0.403,P < 0.001) probably because of physical changes in the tuber during storage. The visual method can be used as a fast method, especially at harvest. However, the homogenization and visual methods determine, to a certain degree, different tuber properties leading to the discoloration potential. Therefore, a complete comparison is not possible. The methods studied in this paper can complement but not substitute each other. Reliable comparisons between institutes require use of the same method to determine the discoloration potential of the tuber.


Discoloration susceptibility storage location 



Absorbance units


Polyphenol oxidase


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Literature Cited

  1. Bechhold, H., and F. Erbe. 1936. Versuch zur Aufklärung des Mechanismus der Kupferprobe zur Feststellung des Kartoffelbaus. Phytophat Z 9:259–295.Google Scholar
  2. Bundessortenamt. 2000. BSA, Beschreibende Sortenliste. Kartoffeln. Landbuch-Verlagsgesellschaft mbH, Hannover, Germany. pp 58–67.Google Scholar
  3. Chotkowski, J., J. Komorowska-Jedrys, J. Rembeza, and E. Ratuszniak. 1993. Catalogue of Polish potato varieties. Potato Research Institute, Bonin, Poland. pp 98–99.Google Scholar
  4. Corsini, D.L., J.J. Pavek, and B. Dean. 1992. Differences in free and protein-bound tyrosine among potato genotypes and the relationship to internal blackspot resistance. Am Potato J 69:423–435.CrossRefGoogle Scholar
  5. Dean, B.B., N. Jakowiak, M. Nagle, J. Pavek, and D. Corsini. 1993. Blackspot pigment development of resistant and susceptibleSolanum tuberosum L. genotypes at harvest and during storage measured by three methods of evaluation. Am Potato J 70:201–217.CrossRefGoogle Scholar
  6. Henniger, H. 1968. Die Knollennassfäule und die Schwarzbeinigkeit der Kartoffel und ihre Bedeutung für die Pflanzguterzeugung. Saat-,und Pflanzgut 9:83–87.Google Scholar
  7. Iritani, W.M., L.D. Weller, and N.R. Knowles. 1984. Factors influencing incidence of internal brown spot in Russet Burbank potatoes. Am Potato J 61:335–343.CrossRefGoogle Scholar
  8. Kunkel, R., and Y.M. Holstad. 1971: Growing blackspot resistant potatoes. Am Potato J 48:295.CrossRefGoogle Scholar
  9. Molema, G-J. 1999. Mechanical force and subcutaneous tissue discoloration in potato. PhD thesis, published by the Institute of Agricultural and Environmental Engineering (IMAG), Wageningen, The Netherlands. pp 1–11Google Scholar
  10. Mondy, N.I., S. Chandra, and W.D. Evans. 1985. Enzymatic discoloration and phenolic content of potato tubers from cultivar resistant and susceptible to the golden nematode. Am Potato J 62:207–213.CrossRefGoogle Scholar
  11. Mulder, E.G. 1949. Mineral nutrition in relation to the biochemistry and physiology of potatoes. Plant and Soil 2:59–121.CrossRefGoogle Scholar
  12. Pavek, J., D. Corsini, and F. Nissley. 1985. A rapid method for determining blackspot susceptibility of potato clones. Am Potato J 62:511–517.CrossRefGoogle Scholar
  13. Sabba, R.P., and B.B. Dean. 1996. Effect of cold storage on proteinase and chorismate mutase activities inSolanum tuberosum L. Genotypes differing in blackspot susceptibility. Am Potato J 73:113–122.CrossRefGoogle Scholar
  14. Winiger, F.A., and J.W. Ludwig. 1974: Methoden der Qualitätsbeurteilung bei Kartoffeln für den menschlichen Konsum. Potato Res 17:434–465.CrossRefGoogle Scholar

Copyright information

© Springer 2001

Authors and Affiliations

  • Efren Delgado
    • 1
  • Jaroslaw Poberezny
    • 2
  • Elke Pawelzik
    • 1
  • Ilona Rogozinska
    • 2
  1. 1.Institute of Agricultural ChemistryGeorg-August-UniversityGoettingenGermany
  2. 2.Department of Storage of Agric. and Food ProductsUniversity of Technology and AgricultureBydgoszczPoland

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