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. 2014 Dec 16;14:377. doi: 10.1186/s12870-014-0377-1

Figure 1.

Figure 1

Design 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).