Umami compounds are a determinant of the flavor of potato (Solanum tuberosum L.).
Vegetable flavor is an important factor in consumer choice but a trait that is difficult to assess quantitatively. The purpose of this study was to assess the levels of the major umami compounds in boiled potato tubers, in cultivars previously assessed for sensory quality. The free levels of the major umami amino acids, glutamate and aspartate, and the 5'-nucleotides, GMP and AMP, were measured in potato samples during the cooking process. Tubers were sampled at several time points during the growing season. The levels of both glutamate and 5'-nucleotides were significantly higher in mature tubers of two Solanum phureja cultivars compared with two Solanum tuberosum cultivars. The equivalent umami concentration was calculated for five cultivars, and there were strong positive correlations with flavor attributes and acceptability scores from a trained evaluation panel, suggesting that umami is an important component of potato flavor.
Morris
Wayne L
WL
Quality, Health and Nutrition, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, United Kingdom.
Ross
Heather A
HA
Ducreux
Laurence J M
LJ
Bradshaw
John E
JE
Bryan
Glenn J
GJ
Taylor
Mark A
MA
D000249:Adenosine Monophosphate / Q000032:analysis; D001224:Aspartic Acid / Q000032:analysis*; D018698:Glutamic Acid / Q000032:analysis*; D006157:Guanosine Monophosphate / Q000032:analysis; D006801:Humans; D035281:Plant Tubers / Q000737:chemistry* / Q000254:growth & development; D011198:Solanum tuberosum / Q000737:chemistry*; D013649:Taste
D001224:Aspartic Acid; D018698:Glutamic Acid; D000249:Adenosine Monophosphate; D006157:Guanosine Monophosphate