Akademik Veri Yönetim Sistemi
Applied Fruit Science, cilt.67, sa.3, 2025 (SCI-Expanded, Scopus)
Organic plant growth-promoting such as, bacteria, vermicompost, etc. provide a sustainable and environmentally friendly alternative to chemical fertilizers. This study aimed to investigate the effects of vermicompost (worm castings), plant growth-promoting bacteria (Bacillus subtilis OSU-142) (PGPR) and algae extract (extracted from Eğirdir Lake/Türkiye) treatments either indidually or in combination on antioxidant enzyme activities and phenolic compounds of ‘Jeromine cv.’ apple. An experiment which was randomized block design was conducted in a commercial apple orchard under ecological conditions of Lake Region/Türkiye, in 2021 and 2022 years. All treatments were applied to both soil and leaves. The activity of antioxidant enzymes catalase (CAT), ascorbate peroxidase (APX), peroxidase (POD) and superoxide dismutase (SOD) were examined. Also, the status of phenolic compounds such as catechin, chlorogenic acid, caffeic acid and p-hydroxy benzoic acid were determined. There was a significiant differences in the activity of antioxidant enzymes in differrent plant growth-promoting treatments in both years. Algea treatment had the highest CAT activity. Vermicompost and algea + PGPR treatments significantly increased APX activity compared to the control treatment. Also, vermicompost + PGPR treatment dramatically improved SOD activity. All plant growth-promoting treatments had a changeable effect on all phenolic compounds examined in both years. The highest cathechin, chlorogenic acid, caffeic acid and p-hydroxy benzoic acid values were obtained from vermicompost + algae treatment in 2021 year and vermicompost + PGPR treatment in 2022. Consequently, it seems that the use of plant growth-promoting to improve antioxidant enzymes activities and phenolic compounds may be useful in sustainable apple production.