赣南不同脐橙品种果实体外抗氧化性的研究

分别以清除DPPH.、ABTS+.和.OH自由基效果综合评价赣南主栽的4个脐橙品种成熟果实的抗氧化性,结果表明:4个脐橙品种果肉清除3种自由基的效果,红肉与纽荷尔相似,林娜与朋娜相似;但红肉和纽荷尔清除3种自由基的效果分别显著地(P<0.05)高于林娜与朋娜。4个品种脐橙果皮清除DPPH.和ABTS+.自由基的效果与果肉一致,清除.OH自由基的效果纽荷尔、红肉、林娜3品种相似,但显著地高于朋娜(P<0.05)。4个脐橙品种果皮清除3种自由基效果均优于果肉。因此,从抗氧化角度考虑,纽荷尔、红肉脐橙值得在当地进一步扩大栽培面积,加工厂废弃的脐橙皮渣是可供利用的抗氧化资源。

A Study on in Vitro Antioxidant Activities of Orange Pulp and Peel of Four Ripe Navel Orange Cultivars Planted in South Jiangxi

In vitro antioxidant activities of orange peel and pulp of four ripe navel orange cultivars(Newhall,Cara,Navelina,Bonanza),which are cultivated in South Jiangxi,are assessed with DPPH·,ABTS+· and ·OH free radical neutralization approaches in this paper.The results show that by orange pulp in vitro antioxidant activities these four orange cultivars are categorized into two groups,group A formed by Newhall and Cara,and group B formed by Navelina and Bonanza.There is no statistical difference between the groups.But the performance of group A is statistically better than that of group B with P-value <0.05.By neutralization activities of orange peel on DPPH· and ABTS+·free radicals,these four orange cultivars have the same performance as that of orange pulp.By orange peel neutralization activities of ·OH free radicals three cultivars(Newhall,Cara,Navelina,Bonanza) have similar performance.But they are statistically better than that of Bonanza with P-value <0.05.The neutralization performance of orange peel is better thanthat of orange pulp.If only considering in vitro antioxidant activities of these four orange cultivars,two cultivars(Newhall,Cara) are worthy of expanding their production.And it could be concluded that the side product the orange peel fragment is a rich resource for producing antioxidants.