Moradi Samira, Koushesh Saba Mahmoud, Mozafari Ali Akbar, Abdollahi Hamid
Dept. of Horticultural Science, Univ. of Kurdistan, Sanandaj, P. O. Box: 416, Iran.
Horticultural Research Dept, Seed and Plant Improvement Inst, Karaj, 31585-4119, Iran.
J Food Sci. 2016 Jul;81(7):H1833-9. doi: 10.1111/1750-3841.13359. Epub 2016 Jun 7.
Quince fruit has many benefits to human health and is excellent source of bioactive compounds. The fruit of 15 quince genotypes stored at 2 °C for 5 mo to study fruit quality changes during cold storage. Fruit were sampled monthly and stored at 20 °C for 24 h. Fruit ascorbic acid (AA), total phenol (TP), and total flavonoid (TF) concentrations, total antioxidant activity (TAA), flesh browning (FB) incidence, polyphenol oxidase (PPO), peroxidase (POX), and superoxide dismutase (SOD) activities were measured during storage. A high variation in bioactive compounds was observed across genotypes. The range of 26.8 to 44.4 mg/100 g FW for AA, 86.7% to 98.2% for TAA, 157.7 to 380.7 mg GAE 100(-1) g FW for TP, and 5.3 to 10.7 mg/100 g FW for TF were observed across genotypes at harvest time. The overall AA, TAA, TP, TF, and SOD decreased while PPO and POX increased during storage. FB was first observed after 4 mo and increased thereafter while the FB index was different across genotypes. Higher bioactive content may prevent or reduce FB index so that a negative correlation was found between FB and AA, TAA, TP, TF, and SOD.
温柏果实对人体健康有诸多益处，是生物活性化合物的优质来源。对15种温柏基因型的果实于2℃下贮藏5个月，以研究冷藏期间果实品质的变化。每月对果实进行采样，并在20℃下贮藏24小时。在贮藏期间测定果实的抗坏血酸（AA）、总酚（TP）、总黄酮（TF）含量、总抗氧化活性（TAA）、果肉褐变（FB）发生率、多酚氧化酶（PPO）、过氧化物酶（POX）和超氧化物歧化酶（SOD）活性。观察到不同基因型的生物活性化合物存在很大差异。在收获时，不同基因型的AA含量范围为26.8至44.4毫克/100克鲜重，TAA为86.7%至98.2%，TP为157.7至380.7毫克没食子酸当量/100克鲜重，TF为5.3至10.7毫克/100克鲜重。在贮藏期间，总体上AA、TAA、TP、TF和SOD下降，而PPO和POX增加。FB在4个月后首次出现，此后增加，不同基因型的FB指数不同。较高的生物活性含量可能预防或降低FB指数，因此在FB与AA、TAA、TP、TF和SOD之间发现了负相关。
