EFFECTS OF RHIZOBACTERIA APPLICATION ON ENZYME ACTIVITY OF DIFFERENT APPLE SCION–ROOTSTOCK COMBINATIONS

By using biofertilizers consisting of beneficial microorganisms instead of synthetic chemicals, plant growth is increased, damage to the environment is largely prevented and soil fertility is preserved. This study was conducted using seven standard cultivars (Scarlet Spur, Red Chief, Fuji, Jeromine, Galaxy Gala, Granny Smith, and Golden Reinders), which were budded onto M9 and MM106 rootstocks commonly used in the region. During the experiment, nitrogen and phosphorus solvent rhizobacteria were applied three times over a 15-day period in the spring. The application of rhizobacteria had a positive impact on the catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD) activities observed in the leaves across all scion-rootstock combinations. This effect ranged from 4.0% to 30.0% for CAT, from 5.2% to 21.7% for SOD, and from 13.7% to 29.1% for POD. In this study, very significant results were obtained on the effects of rootstocks and rhizobacteria application on enzymatic activity. The results of the present study may provide significant leads for further studies on this subject.