Imran Muhammad, Kang Hajeong, Kim Eun-Ha, Lee Sang-Gu, Park Hyun-Min, Choi Hanyoung, Kim Sung-Hoon, Lee Seonwoo, Oh Seonwoo
Department of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
Biosafety Division, National Institute of Agriculture Science, Rural Development Administration, Jeonju, Republic of Korea.
Front Plant Sci. 2025 Aug 15;16:1649912. doi: 10.3389/fpls.2025.1649912. eCollection 2025.
Onions ( L.) are widely recognized for their antioxidant properties, bioactive compounds such as flavonoids, organosulfur compounds (OSCs), and phenolics. This study evaluate the antioxidant activities, phytochemical composition, and nutrient variations of two onion varieties, Katamaru (KM) and Sunpower (SP), cultivated in two different locations, Muan and Changnyeong, Korea. The antioxidant activity was assessed through enzymatic and non-enzymatic parameters, including peroxidase (POD), polyphenol oxidase (PPO), ascorbate peroxidase (APX), glutathione reductase (GSH), catalase (CAT), superoxide dismutase (SOD), DPPH radical scavenging activity, and total phenolic content (TPC). The results indicated that KM consistently exhibited higher antioxidant potential than SP, with Muan-grown samples demonstrating superior enzymatic and non-enzymatic activities compared to Changnyeong. Where Muan's alkaline soil and higher phosphorus content favored oxidative stress mitigation. Furthermore, nutrient analysis revealed significant genotype x environment interactions, affecting macronutrient (K, P, Ca, Mg, S) and micronutrient (Na, Cu, Fe, Mn, Zn) accumulation. Additionally, KM demonstrated higher amino acid composition compared to SP in both location, Muan and Changnyeong, likely influenced by environmental factors such as temperature and soil pH. The findings of this study offer insights for improving onion antioxidant and nutrient traits. These results emphasize the role of environmental adaptation and varietal selection in maximizing onion quality and potential health benefits.
洋葱（L.）因其抗氧化特性、生物活性化合物如黄酮类、有机硫化合物（OSCs）和酚类物质而被广泛认可。本研究评估了在韩国务安和昌宁两个不同地点种植的两个洋葱品种片丸（KM）和阳光（SP）的抗氧化活性、植物化学成分和营养成分差异。通过酶促和非酶促参数评估抗氧化活性，包括过氧化物酶（POD）、多酚氧化酶（PPO）、抗坏血酸过氧化物酶（APX）、谷胱甘肽还原酶（GSH）、过氧化氢酶（CAT）、超氧化物歧化酶（SOD）、DPPH自由基清除活性和总酚含量（TPC）。结果表明，KM始终表现出比SP更高的抗氧化潜力，务安种植的样品与昌宁相比表现出更高的酶促和非酶促活性。务安的碱性土壤和较高的磷含量有利于减轻氧化应激。此外，营养分析显示存在显著的基因型×环境相互作用，影响大量营养素（钾、磷、钙、镁、硫）和微量营养素（钠、铜、铁、锰、锌）的积累。此外，在务安和昌宁两个地点，KM的氨基酸组成均高于SP，这可能受温度和土壤pH值等环境因素影响。本研究结果为改善洋葱的抗氧化和营养特性提供了见解。这些结果强调了环境适应性和品种选择在最大化洋葱品质和潜在健康益处方面的作用。
