o:7695 Fruit weight and primary metabolites content of plum fruits as affected by planting density en Abstract: An experiment was conducted to evaluate the effect of different dense planting (4×1 m; 4×2 m and 5×3 m) on the fruit weight and contents of primary metabolites (soluble solids, total sugars, invert sugars, total acids, and pH) in the fruits of eight plum cultivars (‘Čačanska Rana’, ʻČačanska Lepotica’, ‘Timočanka’, ‘Krina’, ‘Mildora’, ʻČačanska Najbolja’, ʻČačanska Rodna’ and ‘Stanley’). During the three-year experimental period, results showed variability in fruit weight and chemical composition between different cultivars and planting densities. The highest fruit weight was recorded at the planting distance of 4×2 m in cultivars ʻČačanska Rana’, ʻČačanska Lepotica’, ʻKrina’, ʻMildora’ and ʻČačanska Najbolja’, while the cultivars ʻTimočanka’, ʻČačanska Rodna’ and Stanley’ had the highest value at the standard distance of 5×3 m. Regarding primary metabolites, in all tested cultivars, the accumulation and synthesis of soluble solids and sugars in the fruit increased with increasing planting density, while pH and total acids showed the opposite trend. The present results indicated that different planting densities have an important effect on fruit weight and plant metabolism, promoting the synthesis and accumulation of primary metabolites in the fruits, thus positively affecting the quality and commercial value of the fruit. plum, high-density planting, fruit weight, primary metabolites 1552100 978-99976-84-02-8 91552100 142619649 2025-05-26T12:20:21.084Z 44 no 46 Svetlana Paunović Fruit Research Institute, Čačak, Serbia 46 Radivoj Prodanović University Business Academy in Novi Sad, Faculty of Economics and Engineering Management, Novi Sad, Serbia 46 Mira Milinković Institute of Soil Science 0000-0001-5175-6842 46 Žaklina Karaklajić-Stajić Fruit Research Institute, Čačak, Serbia 46 Jelena Tomić Fruit Research Institute, Čačak, Serbia 46 Boris Rilak Fruit Research Institute, Čačak, Serbia application/pdf 791409 https://unilib.phaidrabg.rs/o:7695 no yes 1 70 92000004 71A05 Book of Proceedings: XIV International Symposium on Agricultural Sciences "AgroReS 2025" 26-29 May 2025, Trebinje, Bosnia and Herzegovina 34 40 2025