Effect of environmental stress during tuber development on accumulation of glycoalkaloids in potato (Solanum tuberosum L)

✍ Scribed by Papathanasiou, Fokion; Mitchell, Samuel H; Watson, Sally; Harvey, Barbara M?R

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 103 KB
• Volume: 79
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(19990701)79:9<1183::aid-jsfa341>3.0.co;2-4

✦ Synopsis

The effects of low temperature and of combined stresses, cool temperature and waterlogging and also warm temperature and drought, on potato tuber glycoalkaloid levels were investigated, with emphasis on comparison of tubers of similar size. The early maturing cultivars Home Guard, Rocket and British Queen were grown under favourable controlled environment conditions (18/14 °C day/night temperature, 14 h photoperiod) until the imposition of treatments after the start of tuber initiation. Transfer to low temperature (12/9 °C) did not increase total glycoalkaloid concentration in any of the three cultivars. However, waterlogging at 12/9 °C increased total glycoalkaloid concentration during the later stages of development of British Queen. Drought stress at 24/18 °C also increased total glycoalkaloid concentration in British Queen, although the response varied between individual tubers of similar size. Total glycoalkaloid concentrations in tubers of Rocket were not affected by the combined stress treatments, and any effects on Home Guard were very much less than on British Queen.