University of Tehran International Journal of Horticultural Science and Technology 2322-1461 12 4 2025 10 01 Comparing Effects of Priming Chili Pepper Seed with Different Plant Biostimulants, with Balancing Effects on Vegetative and Root Growths and Seedling Quality 1173 1196 100801 10.22059/ijhst.2025.377391.859 EN Elham Ahmed Arraf Department of Horticulture and Its Technologies, Faculty of Agriculture, Foods and Environment, Sana’a University, Sana’a P.O. Box 1247, Yemen. Isam Abdulbaseat Al-madhagi Department of Horticulture and its Technologies, Faculty of Agriculture, Foods and Environment, Sana’a University, Sana’a, Yemen Journal Article 2024 06 01 Plant extracts, derived from natural sources, are widely used as cost-effective biostimulants to enhance plant growth. In this study, various plant extracts, including aqueous and ethanolic extracts from different parts of Moringa oleifera (leaves, flowers, and seeds), as well as aqueous extracts from prickly pear (Opuntia ficus-indica), red beetroot (Beta vulgaris), and carrot root (Daucus carota L.), were used to prime seeds of three Yemeni hot pepper genotypes (Zaaitri, Haimi, and Dhamari) at two different concentrations. The results revealed significant differences among the genotypes. Water extracts from Moringa flowers, Moringa leaves, and prickly pear significantly promoted root growth in all genotypes. Additionally, beetroot extract, a combination of Moringa flower with seed extracts, and prickly pear extract showed notable improvements in vegetative growth traits. Regarding biomass-related traits (DM%, MM%, and OC%), Moringa seed extract, in Haimi, the combination of Moringa seed and flower extracts in Dhamari, and beetroot extract in Zaaitri yielded the most favorable results. These findings provide valuable insights for optimizing seedling production practices and underscore the potential for developing affordable, plant-based biostimulants in agricultural applications. https://ijhst.ut.ac.ir/article_100801_9e3f877a60cc0034c827c1530679bc2d.pdf