毛脉蓼系统分类位置的修订  

Establishment of the distinct species status of Polygonum ciliinerve based on morphological and anatomical data

作　　者：刚爱书[1] 蔡霞[1] 

机构地区：[1]西北大学生命科学学院,西安710069

出　　处：《植物分类学报》2008年第5期742-749,共8页Acta Phytotaxonomica Sinica

基　　金：陕西省自然科学基金(2004C102)资助

摘　　要：在《中国植物志》以及各地方植物志中关于毛脉蓼Polygonum ciliinerve(Nakai)Ohwi的分类位置还存在争议,鉴于此,本研究应用扫描电子显微镜、常规石蜡切片以及表皮离析方法对毛脉蓼的营养和繁殖器官进行了观察,并对毛脉蓼的系统分类位置进行了全面的分析和探讨。结果表明,毛脉蓼的主要药用部位是块茎,而不是块根,且来源于匍匐茎节上的腋芽或者顶芽;叶的上表皮细胞近长方形,下表皮浅波状,叶上、下面沿叶脉均具乳头状突起,且其叶上、下表皮均具多数腺毛;叶主脉中5个维管束呈一轮分布,叶柄横切面具10个维管束,其中7个小的排成一圈,1个较大的维管束位于沟槽近中央的部位,而另2个小的维管束位于沟槽两侧的突起中;果皮的微形态为孔穴状纹饰,种子横切面为三棱形。由于这些结构与何首乌P.multiflorum都有显著的差异,尤其二者的药用部位在形态发生和结构特征上有着本质的区别,故建议将毛脉蓼作为一个独立的种,而非何首乌的变种。Different opinions regarding the systematic position of Polygonum ciliinerve （Nakai） Ohwi persist in Flora Reipublicae Popularis Sinicae and some provincial floras. The vegetative and reproductive organs of P. ciliinerve were observed using scanning electron microscopy, paraffin sectioning and leaf epidermis isolating methods. The results showed that the main medicinal part ofP. ciliinerve was a stem tuber, which originated from an axillary bud on the creeping stem, rather than a root tuber as previously suggested. The leaf upper epidermal cells were nearly oblong in shape; the lower epidermal cells were superficially wavy. Numerous papillae were present on both sides of the leaf veins, and a few of glandular hairs were dispersed on the leaf epidermis of both sides. The transverse sections of main leaf veins and petioles showed 5 and 10 vascular bundles respectively. The pericarp mieromorphology showed fovea surface ornamentation. The transverse section of the seed was nearly triangular in shape. These characteristics of P. ciliinerve were obviously different from those of P. multiflorum Thunb. As a result, we suggested that P. ciliinerve should be treated as a species rather than a variant of P. multiflorum.

关 键 词：毛脉蓼 器官 形态 解剖 块茎 系统位置 

分 类 号：Q949[生物学—植物学]