Figure 1From: Monochromatic light increases anthocyanin content during fruit development in bilberryDesign of light treatments and sample collections during the ripening process of bilberry fruits. Bilberry plants with unripe berries (developmental stage 2, about 2 weeks after pollination) were kept for 14 h in darkness (0 h sample) and then exposed to continuous blue, red, far-red or white light for 48 h. A set of plants left in continuous darkness (dark treatment) for 48 h represented negative control. After the light treatments, plants were grown in greenhouse under natural photoperiod and controlled temperature (21 ± 1°C) until ripening of fruits (developmental stage 6).Back to article page