Abstract
Abstract The effects of planting and harvest dates on violet betacyanin (BC) and yellow betaxanthine (BX) pigment concentrations and the BC : BX ratio were studied in three table beet (Beta vulgaris L.) genotypes. The R'R, Rt'r, and R'r genotypes, conditioning high (violet), medium (red), and low (orange) BC/BX ratios, were studied using two planting and three harvest dates. Total pigment (BC + BX) increased with both later planting and later harvest dates. BC : BX ratio increased with later planting date but decreased with later harvest dates. For any planting date-harvest date combination the three genotypes showed distinct pigment ratios. The Rt'r genotypes planted on 1 July and harvested at 50 days had a pigment ratio similar to the R'R genotype planted on 1 July and harvested at 100 days. Environment can affect betacyanin and betaxanthine production differently, altering pigment concentrations and ratios.
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