YIELD AND QUALITY OF SULTANI GRAPES (VITIS VINIFERA L.) TREATED WITH 28-HOMOBRASSINOLIDE AND GIBBERELLIC ACID
Makaleler > Tam Makale · 2019
Yazarlar: Burçak İŞÇİ
Applied Ecology and Environmental Research, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2019, cilt 17, ss 12441-12450
DOI: 10.15666/aeer/1705_1244112450
Özet
In this study, the effects of gibberellic acid (GA3) and brassinosteroid (BRs) applications on the yield and berry quality of Sultani grapes were determined during the 2017-2018 period.28homobrassinolide (Hbl) solutions with concentrations 4 ppm (Hbl-4) and 8 ppm (Hbl-8) were sprayapplied at veraison.Three GA3 concentrations were implemented by spraying method.The applications times were as follows; Application 1: 10 ppm, clusters 5-10 cm in length at pre-bloom stage (first week of May), Application 2: 15 ppm at 45-50% flowering (mid-June), and Application 3: 20 ppm with 3-5 mm berry diameter stage.GA3 and BRs on yield components, some quality characteristics relating to clusters and berries (weight, breadth and length, etc.), color of bunches, total phenol content and antioxidant activity were investigated.Results showed that the effects differed, and they were not consistent on all the variables.Effects of the HBl treatments on yield were not as high as GA3 but there were some positive improvements.Hbl was found to be influential on increasing cluster breadth.Berries were harder with the hormone applications.Quality characteristics were more influenced by the seasons rather than the hormones.Color and total anthocyanin contents were better with the hormones.Fructose content indicated a significant increase with the Hbl-4 application.28-homobrassinolide might carry some potentially useful effects on improving yield, not to the extent of GA3, and also on color along with increasing sweetness during the production of 'Sultani' grapes.