Analysis on Differences of Major Biochemical Components of Purple -Bud Tea Tree Germplasm Resources

Yang Xingrong; Yi Bing; Li Youyong; Jiang Huibing; Duan Zhifen; Shang Weiqiong; Yang Yijian; Yang Shengmei; Liu Benying

doi:10.14083/j.issn.1001-4942.2015.12.004

Abstract：Selecting 28 tea tree germplasms with purple bud as test materials,the new shoots with one bud and two leaves were picked to make steamed samples.And then,the differences between different germ-plasms were analyzed in biochemical component contents such as water extract,tea polyphenols,total free a-mino acids,caffeine,anthocyanin content,various catechin compositions,total content of ester type cate-chins,simple catechins and total catechins.The results showed that all the tested materials contained high wa-ter extract (>45.00%).The content of tea polyphenols was in the range of 17.30% ~27.50% with the mean as 23.43%;and there were seven materials with high tea polyphenols (>25.00%),among them, Youwengang 2 with red stems and green leaves contained the highest.The content of amino acids was in the range of 1.50% ~5.80% with the mean as 2.99%;and there were four materials with high amino acids (>4.00%),among them,Gejie 4 with big leaves contained the highest.The content of anthocyanins was in the range of 0.90 ~26.40 mg/g with the mean of 4.50 mg/g;there were three materials which had high anthocy-anins (>10.00 mg/g)features,among them,Gejie 1 with big leaves contained the highest.The bud leaves being dark or light purple in color was closely related to the content of anthocyanins.The deeper the purple of the bud leaves was,the higher the content of anthocyanin was.The 28 tested materials of tea tree germplasms with purple bud contained rich internal substances,and all reached the index requirement of peculiar tea tree germplasm resources.So they could be used as important resources for further deep study,and also provide fine breeding materials for the reasonable development and cultivation of tea tree varieties.