Figure 3From: Solar ultraviolet radiation is necessary to enhance grapevine fruit ripening transcriptional and phenolic responsesEffects of radiation treatment and berry ripening on the accumulation of phenolic compounds. Levels of measured compounds grouped in families are shown. Treatments were: no filter (Ambient), UV-transmitting filter (FUV+) and UV-blocking filter (FUV-) and berry ripening levels corresponded to 23 ºBrix (white bars) and 26 ºBrix (black bars). The compounds analysed were grouped in phenolic acids from the methanol-soluble and -insoluble fractions, stilbenes, flavanols, flavonols and anthocyanins. Means ± SE are shown. Different letters indicate significant differences (at least at P <0.05) between treatments for the 23 ºBrix (italics) and 26 ºBrix (normal type) berries.Back to article page