广西盾翅藤不同地理种源可食部分营养成分评价

Evaluation of Nutritional Components in Edible Parts of Different Geographical Provenances of Aspidopterys concava

  • 摘要: 为筛选出营养价值高、适宜引种至南宁的广西盾翅藤地理种源,本研究测定了靖西、龙州、大新、崇左、平果、大化6个广西盾翅藤地理种源的叶片营养物质及化学成分,对各指标进行描述统计、方差分析、多重比较、相关性分析、主成分分析及聚类分析。结果表明:6种源可食部分所有营养物质及化学成分含量均呈极显著差异,与地理位置、气候因子等存在一定的关联;所有种源叶片中均含有7种必需氨基酸、9种非必需氨基酸,其中靖西、大化种源氨基酸含量最高;必需氨基酸中以药效氨基酸为主,非必需氨基酸中以鲜味氨基酸为主;多数营养物质与化学成分含量间不显著相关,部分必需氨基酸、非必需氨基酸间存在相关性,呈味氨基酸与药效氨基酸间含量多数呈正相关关系。24项指标可提取4个主成分,累计贡献率为96.048%;所有种源中靖西种源综合营养物质含量最高,大化种源次之,龙州种源营养物质综合表现最差。聚类分析将6个地理种源分为3类,龙州、崇左类糖含量高,大新、平果类总黄酮和纤维素含量高;靖西、大化类综合表现最好、药用成分含量高,可作为药用种质资源在南宁引种推广。

     

    Abstract: The study determined the leaf nutrients and chemical components of 6 provenances(Jingxi, Longzhou, Daxin, Chongzuo, Pingguo and Dahua) of Aspidopterys concava to identify geographical provenances with high nutritional value and suitability for introduction to Nanning. The indexes were analyzed by descriptive statistics, variance analysis, multiple comparison, correlation analysis, principal component analysis and cluster analysis. The findings indicated significant differences in the content of all kinds of nutrients and chemical components among 6 A. concava provenances, which were related to geographical location and climatic factors. There were 7 kinds of essential amino acids and 9 kinds of non-essential amino acids in leaves of all provenances, among which Jingxi and Dahua had the highest amino acid contents. There was no significant correlation between the contents of most nutrients and chemical components. Still, there was a correlation between essential and non-essential amino acids, and the contents of taste and pharmacodynamic amino acids were mostly positively correlated. Four principal components could be extracted from 24 indexes, and the cumulative contribution rate was 96.048%. Among all provenances, Jingxi provenance had the highest content of comprehensive nutrients, followed by Dahua provenance, and Longzhou provenance had the worst comprehensive nutrient contents. The 6 geographical provenances were divided into 3 categories by cluster analysis. The sugar content of Longzhou and Chongzuo is high. Daxin and Pingguo have high content of total flavonoids and cellulose. Jingxi and Dahua showed the best overall performance and medicinal ingredients content were high, it could be introduced as medicinal germplasm resources in Nanning.

     

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