Total antioxidant activity and fiber content of select Florida-grown tropical fruits
Total antioxidant activity and fiber content of select Florida-grown tropical fruits
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DOI：
10.1021/jf060566s
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发表时间：
2006-09-20
影响因子：
6.1
通讯作者：
Baldwin, Elizabeth A.
中科院分区：
文献类型：
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作者：
Mahattanatawee, Kanjana;Manthey, John A.;Baldwin, Elizabeth A.
对14种来自南佛罗里达的热带水果（红番石榴、白色番石榴、杨桃、红火龙果（红龙）、白色火龙果（白色龙）、杨梅汁、人心果、荔枝、龙眼、绿色芒果、熟芒果、绿色木瓜和熟木瓜）的抗氧化活性、总可溶性酚（TSP）、总抗坏血酸（TAA）、总膳食纤维（TDF）和果胶进行了评价。ORAC（氧自由基吸收能力）和DPPH（1，1-二苯基-2-苦基肼，自由基清除活性）测定用于测定抗氧化活性。TSP、ORAC和DPPH的范围分别为205.4至2316.7 g没食子酸当量/g果泥、< 0.1至16.7 μ mol Trolox当量/g果泥和2.1至620.2 μ g没食子酸当量/g果泥。TAA、TDF和果胶的范围分别为7.5至188.8 mg/100 g、0.9至7.2 g/100 g和0.20至1.04 g/100 g。抗氧化活性、TSP、TAA、TDF和果胶受品种（番木瓜、番石榴和火龙果）和成熟期（番木瓜和/或芒果）的影响。抗氧化活性与TSP化合物水平呈高度相关性（r = 0.96），但与抗坏血酸水平的相关性较低（ORAC和DPPH数据分别为r = 0.35和0.23）。ORAC法和DPPH法测定的抗氧化活性趋势相似，红番石榴和杨桃的抗氧化活性最高，而人心果和绿色番木瓜的抗氧化活性最低。番石榴和杨梅汁表现出最高的TDF和果胶水平。许多热带水果含有丰富的可水解单宁、鞣花酸共轭物和黄酮苷。本文对目前尚未报道的红/白色火龙果、荔枝和杨梅汁中的酚类物质作了初步的描述。
Fourteen tropical fruits from south Florida (red guava, white guava, carambola, red pitaya (red dragon), white pitaya (white dragon), mamey sapote, sapodilla, lychee, longan, green mango, ripe mango, green papaya, and ripe papaya) were evaluated for antioxidant activity, total soluble phenolics (TSP), total ascorbic acid (TAA), total dietary fiber (TDF), and pectin. ORAC (oxygen radical absorbance capacity) and DPPH (1,1-diphenyl-2-picrylhydrazyl, radical scavenging activity) assays were used to determine antioxidant activity. The TSP, ORAC, and DPPH ranged from 205.4 to 2316.7 g gallic acid equiv/g puree, < 0.1 to 16.7 mu mol Trolox equiv/g puree, and 2.1 to 620.2 mu g gallic acid equiv/g puree, respectively. The TAA, TDF, and pectin ranged from 7.5 to 188.8 mg/100 g, 0.9 to 7.2 g/100 g, and 0.20 to 1.04 g/100 g, respectively. The antioxidant activities, TSP, TAA, TDF, and pectin were influenced by cultivar (papaya, guava, and dragon fruit) and ripening stage (papaya and/or mango). Antioxidant activity showed high correlations with levels of TSP compounds (r = 0.96) but low correlations with levels of ascorbic acid (r = 0.35 and 0.23 for ORAC and DPPH data, respectively). The antioxidant activities evaluated by both ORAC and DPPH showed similar trends where red guava and carambola exhibited the highest and sapodilla and green papaya exhibited the lowest levels. Guava and mamey sapote exhibited the highest TDF and pectin levels. Many of the tropical fruits were shown to contain an abundance of hydrolyzable tannins, ellagic acid conjugates, and flavone glycosides. Preliminary descriptions are given of the phenols in red/white pitaya (dragonfruit), lychee, and mamey sapote, these fruit being thus far uncharacterized in the literature.