中国猕猴桃属植物叶表皮毛策形态特征及数量分类分析

选取国产猕猴桃３５个分类群的代表植株，应用光学显微对其新鲜叶表皮毛的微形态特征，形体大小、细胞结构、分布和密度等多态性状和数量性状进行了观察和测量，该属植物的叶表皮毛微形态特征可归纳为６个类型：１）单细胞毛；２）单列多细胞毛，每形单列毛、泡状单列毛、扭曲毛、直壁单列毛、曲壁单列毛；３）多列渐尖毛和急尖毛，包括多列曲壁渐尖毛和急尖毛，多列直壁渐尖毛和急尖毛；４）多列粗毛，包括柱状毛，多列渐尖粗毛，多

Quantitativetaxonomic analyses of Actinidia (Actinidiaceae) in China based on micromorphological characters of foliar trichomes

WT5BZ]There are various arguments on classification of the genus Actinidia Lindl., a genus with approximately 63 species, 59 of which have been found in China. The paper investigated the characteristics of foliar trichomes of 35 taxa from China under optical microscope, including size, celluar structure, distribution and density. According to their micromorphological characteristics, foliar trichomes can be classified into the following six categories: 1) single cell hairs; 2) uniseriate hairs, including linear, bulbous, twisted, straight walled, and bent walled hairs; 3) multiseriate hairs, including twisted, straight walled and gradually sharpening, straight walled and suddenly sharpening, bent walled and gradually sharpening, and suddenly sharpening hairs; 4) multiseriate thick hairs, including pillar hairs, gradually sharpening thick hairs, and suddenly sharpening thick hairs; 5) stellate hairs, including parenchyma stellate and sclerenchyma stellate (normal state and special states such as rosulate, peltate stellate, and overlopping stellate) hairs ; and 6) dichotomous hairs. On the basis of the micromorphological characteristics of foliar trichomes in Actinidia, with Clematoclethra lasioclada as an outgroup, both the quantitative cladistic analysis and phenetic analysis were performed using Wagner method and UPGMA clustering method respectively to reconstruct the phylogeny of Actinidia in China. The phylogenetic tree generated by cladistic analysis suggests that the sect. Leiocarpae be a monophyletic group, but other three sections, i.e., sect. Maculatae, sect. Strigosae and sect. Stellatae, be non monophyletic groups. The results obtained from the phenetic analysis reflect relationships among the taxa of Actinidia in China, especially a close relationship between A. chinensis and A. deliciosa, and a relatively remote relationship between A. callosa var. henryi and A. callosa var. discolor. In conclusion, the micromorphological characters of foliar trichomes and the methods of quantitative taxonomic analysis are of key importance to studies on phylogenetic and phenetic relationships of Actinidia.