芍药属根、茎解剖结构及其系统分类地位的探讨

A Study on the Root and Stem' s Anatomical Structure of Paeonia and Its Systematic Position

本文研究结果表明,芍药属(Paeonia L.)的芍药组(Sect,Paeon)和牡丹组(Sect,Moutan)植物根、茎解剖结构的主要区别为:芍药组植物根属二原型,贮藏物质主要位于次生木质部。茎无次生保护组织,皮层及髓簿壁组织中不含晶簇异细胞,次生木质部为环孔材结构,牡丹组植物根多为三原型,贮藏物质主要位于次生韧皮部。茎有次生保护组织,皮层及髓簿壁组织中含有星状晶簇异细胞,次生木质部为散孔材结构。 综合有关资料及本文研究结果,作者支持将原属毛茛目、毛茛科的芍药属植物独立为芍药科(Paeoniaceae)、芍药目(Paeonioles),并倾向于将该目放在毛茛目之前,属于最原始的被子植物。

This study indicates that the main differences of the root and stem's anatomical structure of Sect Paeon and Sect Mouta in Paeonia is that Sect Paeon's root is diarch, its storing material in the place of secondary xy]em mainly, and its stem has no protective tissues, there aren't any druse idioblasts in its cortex and pith parenchyma, its secondary xylem is ring-porous wood structure; that Sect Mouta's root is triarch, with its storing material mainly in the place of secondary phloem, and its stem has secondary protective tissues, there are star-shaped druse idioblasts in the cortex and pith parenchyma, its secondary xylem is diffuse porous wood structure.Synthesizing the research materials concered and the result shown in this paper, the authors support the viewpoint that Paeonia plant being oringinajly part of Ranals, Ranunculaceae is independent, is Paeoniaceae, Paeoniales, and prefer to put it before the Ranales. Paeonia belongs to the most primitive angiospermae.