20.500.12556/RUL-189578 Enhancing zinnia floral traits by exposure to UV radiation and H2O2 treatment Izboljšanje cvetnih lastnosti cinije z izpostavljenostjo UV-sevanju in obdelavo s H2O2 The study aimed to determine the effects of abiotic stress, represented by ultraviolet radiation (UV-B) and hydrogen peroxide (H₂O₂), on the floral and molecular traits of the zinnia plant (Zinnia elegans L.). The experiment was conducted at the College of Agriculture, University of Anbar. The results showed that UV-B exposure at 7 days of seedling age reduced the time to the first floral bud, suggesting radiation accelerates flowering. The same treatment also showed the highest gene expression levels for ZeCHI and Ze5GT, linked to anthocyanin biosynthesis, reflected in improved flower color traits. Hydrogen peroxide treatments enhanced antioxidant defenses, with 1 % and 2 % concentrations increasing catalase (CAT) activity and 1 % boosting superoxide dismutase (SOD). These treatments improved oxidative balance. The 2 % hydrogen peroxide treatment increased floral longevity and the number of flowers, indicating that regulating oxidative stress improves flower quality and duration. Results suggest abiotic stresses can effectively enhance floral, molecular, and physiological traits in zinnia by regulating gene expression and boosting antioxidants, providing a scientific basis for ornamental plant improvement. Zinnia elegans UV-B radiation hydrogen peroxide anthocyanin gene expression cinije okrasne rastline glicinbeatin UV-B sevanje vodikov peroksid antocianin izražanje genov true false true Angleški jezik Slovenski jezik Članek v reviji 2026-10-09 11:40:25 2026-10-09 11:40:31 2026-10-10 04:29:38 0000-00-00 00:00:00 2026 0 0 11 str. no. 3 Vol. 122 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 631 1854-1941 10.14720/aas.2026.122.3.28595 294452995 AL-ISSAWI+et+al.+(J)_(1)_(1).pdf AL-ISSAWI+et+al.+(J)_(1)_(1).pdf 1 E7A151ACE96305D657E9E5CC9FEA4CA3 28031d1a81467807b7924c360d5ff3845a44b6f7eb6da6fe179abc9aa474daf9 0705bbe9-c3c7-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250229 https://journals.uni-lj.si/aas/article/view/28595/22602 1 524fc9a9-c3c5-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250228 Biotehniška fakulteta Acta agriculturae Slovenica Acta agriculturae Slovenica 0 0 0