| dc.description.abstract | In modern apple growing, plant and pomological characteristics as well as physiological behaviors of genotypes may vary according to the rootstock, changing growth ecology, and applications of biological control agents. The aim of this research is to determine the effects of rhizobacteria application on the biochemical substances (contents of total phenolics, total flavonoids and total anthocyanin and antioxidant activity) in fruits. This study was carried out on seven standard apple cultivars (‘Scarlet Spur’, ‘Red Chief’, ‘Fuji’, ‘Jeromine’, ‘Galaxy Gala’, ‘Granny Smith’ and ‘Golden Reinders’) grafted on M9 and MM106 rootstocks. Within the scope of the study, nitrogen+ phosphorus solvent rhizobacteria were applied to each tree three times in 15 days in the spring period. On the other hand, in the study, the effects of rhizobacteria application on the biochemical contents of the fruits differed according to scion–rootstock combinations and these provided generally significantly positive contributions. Considering the fruit color data, the highest result was obtained from hue angle with 122.41 on ‘Granny Smith’ grafted to MM106 rootstock. According to the phenolic compound analysis, the highest phenolic compound content was epicatechin with 15.77mg/kg, determined on ‘Scarlet Spur’ grafted to M9 rootstock. The highest positive contribution was 5.5% in total phenolic content, 4.5% in total flavonoid content, 3.3% in total anthocyanin content, and 5.7% in antioxidant activity. According to the results of this study, it has been determined that bacteria have positive effects on different fruit properties, but results may change with climate, growing conditions, environment and soil properties. | tr |
