NDLI: Glycoalkaloids in potato tubers grown under controlled environments

Content Provider	Springer Nature Link
Author	Nitithamyong, Anadi Vonelbe, Joachim H. Wheeler, Raymond M. Tibbitts, Theodore W.
Copyright Year	1999
Abstract	Tuber content of α-solanine, α-chaconine, and total glycoalkaloids (TGA) was determined for the potato cultivars, Norland, Russet Burbank, and Denali grown under different environmental conditions in growth chambers. The lowest TGA concentrations (0.30 to 0.35 mg g$^{1}$ dry tissue) were found in the cv. Norland with 400 μnol m$^{-2}$ s$^{-1}$ photosynthetic photon flux (PPF), 12 h day length, 16 C temperature, and 350 μmol mol$^{-1}$ carbon dioxide. The ratio of α-chaconine to α-solanine was close to 60:40 under all growing conditions, except that it was 50:50 under the low temperature of 12 C. Cultivars responded similarly to environmental conditions although TGA was about 20% greater in cv. Russet Burbank and about 30% greater in Denali compared to Norland. The largest changes in TGA occurred with changes in temperature. In comparison to 16 C, TGA were 40% greater at 12 C, 80% greater at 20 C, and 125% greater at 24 C (0.70 mgg $^{-1}$ dry weight). The TGA concentratation increased from 10 to 25% with an increase in light from 400 to 800 μmol m$^{-2}$ s$^{-1}$ PPF for all three cultivars. TGA increased 20% with extension of the day length from 12 to 24 hr and also increased 20% when carbon dioxide was increased from 350 to 1000 umol mol$^{-1}$. TGA concentrations were not influenced by changes in relative humidity from 50 to 80%. TGA concentrations decreased only slightly in harvests made from 9 to 21 weeks after planting. Variations in TGA among the different growing conditions and cultivars were below 20 mg/100 g fresh weight (= 1.0 mg g$^{-1}$ dry weight) recognized as the upper concentration for food safety. However the results suggest that TGA should be considered when potatoes are grown at temperatures above 20 C.
Starting Page	337
Ending Page	343
Page Count	7
File Format	PDF
ISSN	1099209X
Journal	American Potato Journal
Volume Number	76
Issue Number	6
e-ISSN	18749380
Language	English
Publisher	Springer-Verlag
Publisher Date	1999-01-01
Publisher Institution	Potato Association of America
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Sciences Agriculture Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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