Daily temperatures measured during the ripening period of <i>Vaccinium</i> berries in two consecutive seasons (2013–2014).

<p>Colored bars show the ripening process, through green, pink and purple-blue (fully ripe) stages of bilberries in 2013 (a), in 2014 (c) and blueberries in 2013 (b), in 2014 (d).</p

Temperature (a) and relative humidity (RH; b) measured under colored photo-selective nets.

<p>Data were recorded every hour continuously for one week during the fruit ripening. Temperature is expressed as difference between temperatures measured under net and under direct sunlight in open-field. </p

List of anthocyanins (AC) identified in wild bilberries grown under different photo-selective nets during 2013 and 2014.

<p>The accumulation of the compound was significantly affected by the parameter, as indicated by two-way ANOVA test</p><p>*** p<0.001</p><p>** p<0.01</p><p>* p<0.05.</p><p>n.d. = not detected.</p><p>List of anthocyanins (AC) identified in wild bilberries grown under different photo-selective nets during 2013 and 2014.</p

Locations where bilberry plants where collected and later on cultivated in the test field.

<p>Blueberry bushes (cv. Brigitta Blue) were already grown in the test field.</p><p>Locations where bilberry plants where collected and later on cultivated in the test field.</p

Ratios of blue/red (B/R) components of visible light spectrum were measured during daytime under clear sky day (June 30, 2013).

<p>Ratios of blue/red (B/R) components of visible light spectrum were measured during daytime under clear sky day (June 30, 2013).</p

Additional file 1: of Carotenoid metabolism during bilberry (Vaccinium myrtillus L.) fruit development under different light conditions is regulated by biosynthesis and degradation

Spectra of light treatments applied to bilberry fruits. (PDF 27 kb