Effect of Ethephon Spraying on Increasing Anthocyanin Synthesis and Improving Berries Quality of Grape cv.  Beidaneh Ghermez'

Effect of ethephon foliar spray on berry anthocyanin contents and quality of grape (‘Beidaneh Ghermez) was studied, using a split plot design. Four ethephon levels [0 (control), 100, 200 and 300 ppm] were sprayed at two growth stages T1 (10-30% berry veraison) and T2 (50-70% berry ripening). Results showed that ethephon significantly increased berry anthocianin content, berry weight and total soluble solid (TSS). Meanwhile, there were not any significant differences among titrable acidity (TA), pH, test index (TSS: TA) and berry firmness compared with control treatment. Also, there was not any significant difference between applications of ethephon times on measured parameters. Ethephon spraying had more impact on increasing anthocianin in berry of ‘Beidaneh Ghermez’ and improved color. According on obtained results it can be said, 300 ppm concentration of ethephon in early ripening time (T1) had best effect. Also, ethephon spraying not only increased color and total soluble solid content also accelerated fruit maturity and ripening.