Preharvest long-term exposure to UV-B radiation promotes fruit ripening and modifies stage-specific anthocyanin metabolism in highbush blueberry

摘要

a UV-B treatment set-up in the greenhouse. b Effect of a high UV-B dose on fruit ripening after 2-week treatment. c Effect of the control (CK) conditions on fruit ripening after 2-week treatment. d Effects of UV-B on fruit anthocyanin accumulation, the stage label corresponded to the description in Zifkin et al. 13. e Averaged fruit size development of 15 fruits in each treatment, markers with stage label corresponded to the fruits in (d). f Sugar (upper panel) and anthocyanin (lower panel) accumulation of green (left panel) and mature (right panel) fruits. g anthocyanin components of mature fruits. f, g (mean±s.e., n = 3). ‘*‘(P < 0.05) and ‘**‘(P < 0.01) indicates the significant difference between treatment and CK