山茶科部分属种叶表皮形态学研究 Study on leaf epidermis of some plants of Theaceae

Document Type

Journal Article

Publication Date

2004

Keywords

山茶科, 叶表皮形态, 气孔复合体, 纹饰, Gene ontology, Species

Abstract

在光学显微镜下观察了山茶科 Theaceae 10属25种植物叶表皮形态。所检测种类的叶表皮气孔复合体主要有环列型(cyclocytic)、平列型(paracytic)、不规则型(anomocytic)和极少数辐射型(actinocytic)。山茶亚科Theoideae大头茶属Gordonia和荷木属Schima的气孔复合体呈环列型，石笔木属Tutcheria气孔复合体为平列型，圆籽荷属Apteros-perma和厚皮香亚科Ternstroemioideae各属均为无规则型。认为山茶亚科植物的气孔复合体可能是从环列型向平列型或无规则型演化；厚皮香亚科的无规则型为山茶科植物气孔类型中最进化的类型，叶表皮扫描电镜观察结果显示，山茶科不同属间的纹饰有较大的差异，山茶科植物表皮细胞的角质纹饰是从多层、分离的波状条饰(山茶属Camellia、大头茶属)向少数几层、连续或分叉的环状或波状条纹(石笔木属、荷木属和圆籽荷属)，或环状条纹与表皮角质层分离(厚皮香属 Ternstroemia、杨桐属 Adinandra和红淡比属Cleyera)至愈合(猪血木属 Euryodendron、茶梨属Anneslea和柃属Eurya)演化。根据叶表皮形态特征，石笔木属不应与核果茶属Pyrenaria归并；圆籽荷属在系统地位上的独特性，可能是山茶亚科与厚皮香亚科之间的过渡类型。

The epidermal morphology of 25 species in 10 genera of Theaceae was observed under light microscope. Three major types of stomata were recognized: cyclocytic type (Gordonia, Schima), paracytic type (Tutcheria), anomocytic type (Apterosperma, Ternstroemia, Adinandra, Cleyera, Euryodendron, Eurya, Anneslea). The evolutionary trend of stamata was from cyclocytic to paracytic or anomocytic. Anomocytic of Ternstroemoideae was the most advanced type in Theaceae. the epidermal morphology of 16 species in 10 genera was observed under scanning electron microscope. The cuticle patterns varied with genera from multi-layered and discontinuous ringes in Camellia and Gordonia to a few continuous and branched rings in Tutcheria, Schima and Apterosperma, or the ring outside the pore was from separated (Ternstroemia, Adinandra and Cleyera) to being merged with cuticular layer (Euryodendron, Anneslea and Eurya). The result showed that Tutcheria was different from Pyrenaria in leaf stomatal types. Apterosperma had anomocytic stomata, which was different from other taxa in Theoideae, but similar to those in Ternstroemoideae. Therefore, it may be the transitional type between two subfamilies.

Source Publication

华南农业大学学报 Journal of South China Agricultural University

Volume Number

25

Issue Number

3

ISSN

1001-411X

First Page

87

Last Page

93

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