不同生育期卷丹百合的多酚积累特性及其抗氧化活性
摘要:
为探究不同生育期卷丹百合各器官中多酚类物质的积累规律及其抗氧化能力，分别采用福林–肖卡法、NaNO2–AlCl3法、香草醛比色法、pH示差法测定不同生育期(现蕾期、花期、半枯期、全枯期)卷丹百合各器官(基生根、鳞茎、茎生根、茎秆、叶片、株芽、花）中总酚、总黄酮、总黄烷醇和花色苷的含量，运用DPPH法、铜离子还原法和金属螯合能力、抑制脂质过氧化活性，分析其多酚提取物的抗氧化能力。结果表明：不同生育期卷丹百合各器官多酚类物质的含量及其抗氧化活性存在差异；卷丹百合植株在花期总酚含量最高，半枯期的次之，全枯期的最少；花期，花中总酚含量最高，达14.75 mg/g，叶片中的总酚含量次之，珠芽的最低，仅为3.12 mg/g；卷丹百合多酚提取液的抗氧化能力在花期最强，其次是半枯期；相关性分析表明，卷丹多酚类物质与抗氧化活性在各时期、各器官呈现出显著(P<0.05)或极显著(P<0.01)的相关性，相关系数为–1.00~1.00，其中，花期和半枯期卷丹多酚类物质与铜离子还原力基本呈显著或极显著正相关。
Abstract:
To study the polyphenol accumulation and its antioxidant ability in different organs during different growth period in Lilium lancifolium, we employed a group of methods, including Foling Shoka method, NaNO2-AlCl3, vanillin colorimetric method and pH differential method have determined the polyphenol, flavonoids, flavonols, chromosides in different organs at different growing stage. The antioxidant capacity of total polyphenol extracts were analyzed by DPPH method, copper ion reduction method, metal chelating ability and inhibiting lipid peroxidation activity. The results showed that the content and antioxidant ability of polyphenols in various organs of L. lancifolium were different (P<0.05). In the flowering period, the total polyphenol content was at the peak, followed by the semi-dry season, with the lowest content in the total dry season. During flowering, the total phenolicl content reached 14.75 mg/g, and the leaf is 12.19 mg/g, and the lowest bud is only 3.12 mg/g. The antioxidant capacity of polyphenol extract was the largest in flowering period, followed by half-dry period. The correlation analysis showed that there was a significant or very significant positive or negative correlation between the polyphenols and their antioxidant activities in the studied organs and periods, with the correlation coefficient between –1.00 and 1.00. The results can provide the basis for high quality cultivation, timely harvest and reasonable utilization of L. lancifolium.
引用本文王云霞,张萍,葛蓓蕾,雅蓉,张瑞军,靳磊.不同生育期卷丹百合的多酚积累特性及其抗氧化活性[J].湖南农业大学学报：自然科学版,2020,46(5):．
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