• Journal of the Korean Home Economics Association
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• v.42 no.4
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• pp.187-194
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• 2004

The concentration of potato(Solanum tuberosum L.) glycoalkaloids(PCA) (i.e., ${\alpha}$-chaconine and ${\alpha}$-solanine) in Korean cultivated potato plant, and in the different varieties, parts and weights of the potato tubers, were determined by high-performance liquid chromatography(HPLC). The highest concentrations of PGA in potato plants were found in the roots, followed by the stems and leaves. A large quantity of PGA existed in the periderm of 'Atlantic' potatoes, whereas 'Irish Cobbler' contained the lowest amount in five cultivated potato tubers.'Irish Cobbler' potatoes were divided into three parts and the PGA content in each part was determined. It was found that both of the end parts of the potatoes contained higher PGA than the middle part. The PGA contents in four different sizes of potatoes increased toward the smaller size. Thesignificantly high level of PGA was contained in the smallest size potato tubers, which have been used widely for Korean cooking.

• Korean Journal of Plant Tissue Culture
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• v.24 no.2
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• pp.83-86
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• 1997

To produce and supply the healthy potato, basic seed potatoes were produced by stem cutting, microtuberization and hydroponic culture. The total number of tubers and the total tuber weight per $\textrm{m}^2$ of potato were more in hydroponic culture as each products were 1, 152 and 4, 492g than in the stem cutting (75 and 4, 136g) or microtuberization (1, 080 and 1, 080g) using petridishes. The total yield per 10a in the field was propagated highly stem cutting > propagated microtubers > hydroponics > microtubers. The number of tubers per 10a produced by hydroponics (33, 064) was higher than any other methods. This indicated the hydroponic culture can be used in the multiplication of basic seed potatoes.

• Journal of the Korean Society of Food Culture
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• v.24 no.1
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• pp.84-89
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• 2009

This paper was conducted to evaluate aglycones and carbohydrates produced by acid hydrolysis of three potato glycoalkaloids [(PGA); ${\alpha}$-chaconine, ${\alpha}$-solanine, and demissine] in potatoes. Standard solanidine and demissidine were dissolved in 1N HCl and then heated at $100^{\circ}C$ for 10-120 min. Solanidine was rapidly decomposed during acid hydrolysis and one peak that was identified as solantherene ($M^+$=379) by GC-MS was detected. The transformation solanidine to solanthrene was approximately 50% complete after 10 min, approximately 90% complete after 60 min and 100% complete after 120 min. Demissidine was hydrolyzed using the same method that was used to hydrolyze the solanidine. However, demissidine produced only one peak upon GC-MS ($M^+$=399) analysis and was found to be very stable at increased temperatures. Acidy hydrolysis of ${\alpha}$-chaconine, ${\alpha}$-solanine and demissine resulted in the decomposition of ${\alpha}$-chaconine and ${\alpha}$-solanine to solanidine and solanthrene, respectively. Therefore, this hydrolysis method should not be utilized to produce PGA combining with solanidine as aglycone. The individual carbohydrates produced by the two PGAs by hydrolysis were very stable at increased temperatures; therefore, it was possible to quantify these PGAs based on calculation of the individual carbohydrate content. Conversely, because demissidine produced by the hydrolysis of demissine was extremely stable at increased temperatures, it was possible to quantify the PGA based on the aglycone produced by hydrolysis.