Changes in quercetin concentration in onion (Allium cepa L.) owing to location, growth stage and soil type
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A study with onion investigated the variation in the concentration of the potentially anticarcinogenic flavonol, quercetin owing to location, soil type and growth stage. Seven genotypes grown at two locations were analysed for aglycone and total quercetin concentration by reversephase highperformanceliquidchromatography (RPHPLC). Out of seven genotypes investigated, four showed significant differences (P= 0.05) in total quercetin concentration between two locations. In 1993, Texas Grano 10I5Y (TG1015Y) bulbs collected at five growth stages were analysed for quercetin concentration by RPHPLC. Quercetin concentration in TG1015Y at different growth stages showed slight differences. Furthermore, quercetin concentration in bulbs harvested at second growth stage (23 March) was significantly (P= 0.05) greater than at the first growth stage (23 March). A slight difference in total quercetin concentration due to soil was noticed. This study shows that the site of growth of union is a major environmental factor in determining quercetin concentration but soil type and growth stage are not important. Copyright 1995, Wiley Blackwell. All rights reserved
author list (cited authors)
PATIL, B. S., PIKE, L. M., & HAMILTON, B. K.
complete list of authors
PATIL, BS||PIKE, LM||HAMILTON, BK