山茶属油茶组和短柱茶组叶解剖特征及其分类学意义  

Leaf anatomy of Camellia sect. Oleifera and sect. Paracamellia (Theaceae) with reference to their taxonomic significance

作　　者：林秀艳[1] 彭秋发[2] 吕洪飞[2] 杜跃强 汤妣颖[2] 

机构地区：[1]浙江师范大学初阳学院,金华321004 [2]浙江师范大学化学与生命科学学院,金华321004 [3]浙江省金华市林业局,金华321000

出　　处：《植物分类学报》2008年第2期183-193,共11页Acta Phytotaxonomica Sinica

基　　金：浙江师范大学2006年度实验室开放项目(No.110)的资助,

摘　　要：在光学显微镜下观察了山茶属Camellia油茶组sect.Oleifera和短柱茶组sect.Paracamellia 21种(张宏达系统)植物叶解剖特征。结果表明:叶表皮细胞形状均为不规则形;垂周壁式样浅波状或波状,对两组分类具有重要作用。气孔器只存在于叶的下表皮,均为环列型。基于17个叶解剖学及细胞学性状,应用PAST软件对两组进行聚类分析和主成分分析,结果表明:能将两组植物进行明显区分,并且各组中亲缘关系较近的种聚在一起。本研究结果支持将大姚短柱茶C.teniiSealy归入离蕊茶组sect.Corallina;支持狭叶油茶C.lanceoleosa H.T.Chang & J.S.Chiu与窄叶短柱茶C.fluviatilis Hand.-Mazz.,短柱茶C.brevistyla Coh.St.与钝叶短柱茶C.obtusifolia H.T.Chang和粉红短柱茶C.puniceiflora H.T.Chang,长瓣短柱茶C.grijsii Hance与陕西短柱茶C.shensiensis H.T.Chang的合并;建议将褐枝短柱茶C.phaeoclada H.T.Chang作为细叶短柱茶C.microphylla(Merr.)Chien的亚种。研究证明山茶属植物的叶解剖性状在属内分类中具有重要的分类学意义。Leaf anatomy of 21 species representing sect. Oleifera H. T. Chang and sect. Paracamellia Sealy in the genus Camellia was investigated using light microscopy. All the shapes of leaf epidermal cells were polygonal, and the patterns of anticlinal walls were sinuolate or sinuous, which were important to the classification of these two sections. The stomata were cyclocytic type and only present on the abaxial epidermis in both sampled sections. Seventeen leaf anatomical and cytologic characters were selected and used for the cluster analysis and principle components analyses performed by PAST program. Congruent results were obtained, with sect. Oleifera and sect. Paracamellia consistently grouping in two different clades, and some related species nesting together. This study provided leaf anatomical evidence for the merge of C. lanceoleosa H. T. Chang ＆ J. S. Chiu and C. fluviatilis Hand.-Mazz.; ofC. brevistyla Coh. St., C. obtusifolia H. T. Chang, and C. puniceiflora H. T. Chang; and of C. grijsii Hance and C shensiensis H. T. Chang. In addition, it was also proved that C. tenii Sealy should be segregated from sect. Paracamellia and placed in the sect. Corallina Sealy. For further interest, we suggested that C. phaeoclada H. T. Chang be recognized as a subspecies of C. microphylla （Merr.） Chien. Overall, the results presented provided new insights into the relationships within a number of Camellia plants and suggested directions for future studies.

关 键 词：山茶属 叶解剖学特征 分类学 

分 类 号：Q944[生物学—植物学] Q949