文献类型： 外文期刊

作者： Zhang, Wei ¹ ; Hu, Yuxi ¹ ; Li, Zhenyu ¹ ; Wang, Pingsheng ³ ; Xu, Mei ⁴ ;

作者机构： 1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China

2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

3.Yunnan Acad Agr Sci, Tea Res Inst, Menghai 666201, Peoples R China

4.S China Agr Univ, Coll Hort, Guangzhou 510642, Guangdong, Peoples R China

关键词： tea: beverage;species sclereids diversity

期刊名称：AUSTRALIAN SYSTEMATIC BOTANY （ 影响因子：1.108； 五年影响因子：1.442 ）

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收录情况： SCI

摘要： Camellia sinensis (L.) O.Kuntze and most of its wild allies are used for tea throughout China and in many other parts of the world. Although they all belong to Camellia section Thea, their infrasectional classification remains controversial, resulting from heavy reliance on macromorphological features. Furthermore, the identification of tea from the fragments of processed leaves is quite difficult because of the lack of reliable characters. Here, foliar sclereids of 28 species and five varieties were investigated and used to explore their utility in addressing taxonomic problems and identification of commercial teas. Our data showed that foliar sclereids exhibit a wide diversity in this section. They could be divided into 12 types (including a newly recorded dendritic type) and two distribution patterns in the leaf blade. Their forms, type combinations and distribution patterns are reliable features, not particularly influenced by environmental factors, although their distribution density sometimes varies. In addition, they appear constant in individuals of different ages within the same wild population. We conclude that foliar sclereids in the section Thea are relatively stable and their diversity and regularity are of some taxonomic value.