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Glycoalkaloid concentration of potato tubers following continuous illumination
Author(s) -
Percival Glynn,
Dixon Geoffrey,
Sword Alastair
Publication year - 1994
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740660206
Subject(s) - glycoalkaloid , chemistry , fluorescence , fluorescent light , tubercle , sodium , white light , botany , biology , solanaceae , biochemistry , materials science , physics , bacilli , genetics , organic chemistry , quantum mechanics , bacteria , gene , optoelectronics
The total glycoalkaloid concentration of dormant (non‐sprouted) and sprouted potato tubers cv Pentland Hawk was measured following 13 days continuous illumination (250 μmol m −2 s −2 photosynthetically active radiation) using high‐performance liquid chromatography. Comparisons were made of the influence of three sources of illumination: high‐pressure mercury, high‐pressure sodium and fluorescent tube type warm white. Glycoalkaloid concentrations in both dormant and sprouted tubers increased over 13 days illumination regardless of the form of illumination used. Glycoalkaloid concentrations accumulated with time in dormant and sprouted tubers exposed to sodium and fluorescent light but fluctuated in those exposed to mercury light. Dormant tubers were more sensitive to illumination than sprouted tubers regardless of light souce. Fluorescent light was associated with maximum glycoalkaloid synthesis in dormant tubers; while sodium light enhanced glycoalkaloid synthesis in sprouted tubers to the greatest extent. Mercury light weakly elicited glycoalkaloid synthesis in both sets of tubers. Exposure of dormant tubers to continuous light altered the ratio of α‐chaconine to α‐solanine irrespective of illumination source.