南方四种砂梨果实营养及抗氧化活性成分比较分析

Comparative analysis of the nutritional composition and antioxidant properties of four sand pear fruits in area of southern China

对南方地区的翠冠、翠玉、金水2号以及新水4个砂梨(Pyrus pyrifolia Nakai)品种的营养及抗氧化性能进行了测定和分析。结果表明,金水2号的维生素C含量最高,为(3.59±0.02)mg/100 g;新水的可溶性固形物含量最高,为12.32%±0.38%;翠冠的可滴定酸含量最低,为(0.60±0.07)g/kg;翠玉的总酚含量最低,为(0.035±0.003)mg GAE/g,果肉褐变耐受力最强。相关性分析结果显示,维生素C、可滴定酸是影响这4种砂梨果肉抗氧化能力的重要因子。总酚含量与果实可溶性固形物含量呈显著正相关,也是评价砂梨果实营养水平的重要因素。

The nutrient components and antioxidant performance indexes of four sand pear cultivars,Cuiguan,Cuiyu,Jinshui NO.2 and Xinshui pear cultivated in southern China were measured and analyzed.The results showed that the Jinshui NO.2 pear had the highest content of vitamin C,which was(3.59±0.02)mg/100 g;The Xinshui pear had the highest content of soluble solid,which was 12.32%±0.38%;The content of titratable acid in Cuiguan pear was the lowest,which was(0.60±0.07)g/kg;The Cuiyu pear had the lowest content of total phenol,which was(0.035±0.003)mg GAE/g,which cultivar of the fruit flesh was most resistant to browning.Correlation analysis showed that vitamin C and titratable acid were important factors affecting the antioxidant capacity of the pulp of these four sand pears.There was a significant positive correlation between total phenol and fruit soluble solid content,which was also a key factor to evaluate the nutritional level of sand pear fruit.