安徽农业大学学报2017，Vol.44Issue(5)：768-774,7.DOI:10.13610/j.cnki.1672-352x.20171017.024
基于主成分聚类分析研究茶树富集氟的特性
Fluoride accumulation characteristics of different tea varieties based on principal component and cluster analysis
摘要
Abstract
Characteristics of accumulation and translocation of fluoride in different tea (C.sinensis L.) varieties were investigated by the principal component analysis and cluster analysis methods.Results revealed that the fluo ride contents in different parts of tea plants were in the order of old leaf (243.59 mg·kg-1)＞young leaf (101.60 mg·kg-1)＞root (7.53 mg·kg-1) and stem (7.87 mg·kg1).The fluoride contents in old leaves and young leaves were 124.10～464.69 mg·kg-1 and 39.77～256.21 mg·kg-1 respectively.Fluoride contents in leaves varied significantly with the different cultivars (P＜0.05).Principal component analysis results showed that:the contents of fluoride in young leaves and old leaves,BF (bioaccumulation factors) and TF (translocation factors) were significantly correlated (cor relation coefficient＞0.9) to the first principal component whose variance contribution rate is 73.89％.The cluster analysis showed that different tea varieties could be clustered into 4 groups:Wuniuzao cultivar was characterized by high BF (106.1),high TF (39.4) and high fluoride contents in old (464.69 mg·kg-1) and young leaves (256.21 mg·kg1),so was grouped into high accumulation and high translocation type;Fuzao-2-hao cultivar had low BF (34.2),low TF (6.7) and low fluoride contents in old (124.10 mg·kg-1) and young leaves (39.77 mg·kg-1),so was grouped into low accumulation and low translocation type;Longjing 43 and Pingyangzao cultivars were characterized by medium BF (55.8～71.7),low TF (4.9～5.8) and medium fluoride contents in old (264.10～274.21 mg·kg-1) and young leaves (83.04～117.05 mg·kg-1),so were grouped into medium accumulation and low translocation type;Zhenong 113 and other tea varieties had medium BF (48.9～65.4),medium TF (7.9～12.7) and medium fluoride contents in old leaves (203.69～238.98 mg·kg-1) and young (75.72～100.17 mg·kg1),so were grouped into medium accumulation and medium translocation type.Results from this study provide critical data for selecting low fluoride accumulation tea plant varieties.关键词
茶树品种/氟含量/富集/转移/主成分聚类分析Key words
tea cultivars/fluoride contents/accumulation/translocation/cluster analysis分类
农业科技引用本文复制引用
赵强,郜红建,张家侠..基于主成分聚类分析研究茶树富集氟的特性[J].安徽农业大学学报,2017,44(5):768-774,7.基金项目
安徽省农业科学院院长基金项目(16B0815)资助. （16B0815）
