20.500.12556/RUL-190425 From shade to sun rapid phenotypic recovery but persistent metabolic legacy in apple fruit after summer pruning Apple fruit can acclimate to changes in light availability, but whether fruit developing under shade can rapidly recover when suddenly exposed to full sun late in development remains unclear. Several agronomical practices aim to regulate light incidence on the fruit, thereby influencing their growth and development. Summer pruning is a good model to analyze this regulation as it includes a transition between shade and full-sun conditions. In this study, we used summer pruning as a field-scale light perturbation and analyzed the impact of summer pruning on apple fruit at both morphological and metabolic levels by comparing fruit grown under full-sun conditions, fruit grown in the shade, and fruit exposed to full-sun conditions after summer pruning. In the analysis, we included continued measurements of growth, temperature, color, and chlorophyll content before and after performing summer pruning over the last 5 weeks before harvest. Additionally, fruit and leaf dynamics of phenolic compounds was characterized in detail using HPLC/MS. Following pruning, shaded fruit rapidly converged toward sun-exposed fruit in surface temperature, color and anthocyanin accumulation, with anthocyanins reaching sun-exposed levels within six days. However, convergence was incomplete: fruit growth, total soluble solids and several phenolic traits remained intermediate. These results demonstrate that apple fruit exhibits rapid phenotypic acclimation to increased light exposure, whereas metabolic acclimation is slower and constrained by developmental history. acclimation phenolic compounds HPLC/MS temperature light fruit growing ripening aklimatizacija fenolne spojine temperatura svetoloba rast plodov true false true Angleški jezik Slovenski jezik Članek v reviji 2026-10-28 14:30:01 2026-10-28 14:30:08 2026-10-29 04:05:57 0000-00-00 00:00:00 2026 0 0 11 str. Vol. 240 art. 2111873 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 634 0981-9428 10.1016/j.plaphy.2026.111873 302929923 1-s2.0-S0981942826008594-main.pdf 1-s2.0-S0981942826008594-main.pdf 1 0ABAD1F438C2DF9A482DA26A282237C9 99993a551ff27fb5e83c11cca575d9c597ed675d1cb63087ace48ee95ef1944c d84ea519-d2d3-11f1-aea2-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=251752 https://www.sciencedirect.com/science/article/pii/S0981942826008594 1 ad676c5a-d2d3-11f1-aea2-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=251751 Biotehniška fakulteta 0 0 0