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Endogenous abscisic acid, anthocyanin and sugar syntheses in delayed-start cultured grapes under double cropping cultivation system irradiated by blue and red-LED at night
- Rodyoung, A., Masuda, Y., Okawa, K., Ohara, H., Kondo, S.
- Acta horticulturae 2016 no.1115 pp. 161-166
- abscisic acid, anthocyanins, double cropping, grapes, irradiation, red light, sugars
- The effects of blue- and red-light irradiation at night on abscisic acid (ABA) synthesis, anthocyanin and sugar concentrations were examined in delayed-start cultured grapes under a double-cropping cultivation system. ABA and anthocyanin concentrations increased in skin treated with blue and red light-emitting diodes (LED) and the expressions of VlMYBA1-2 and VlMYBA2 at veraison were higher in blue- and red-LED- treated skin. Therefore, the expressions of VlMYBA1-2 and VlMYBA2 at veraison may significantly influence the anthocyanin productions. An increase in sugars was also observed in blue- and red-LED-treated skin. The results suggest that the blue and red LED irradiation at night may be effective at increasing anthocyanin and sugar concentrations in delayed-start cultured grapes under a double-cropping cultivation system. The results also suggest interactions among ABA, anthocyanin and sugar syntheses.