卫矛科16种藤本与乔木次生木质部比较解剖学研究

本文对卫矛科(Celastraceae)16种生长于不同生境的藤本和乔木次生木质部的结构,进行比较解剖学的观察,比较它们之间的异同。本科中南蛇藤属(Celastrus L.)独子藤属(Mo-nocelastrus Wang et Tang)和雷公藤属(Tripterygium Hoook.f.)为典型藤本结构,次生木质部特化水平较高;假卫矛属(Microstropis Wall.et Mcissn)、十齿花属(Dipentoden Dunn)和盾柱属(Pleurostylia Wight.et Arn.)为乔木,次生木质部结构特化水平较低;卫矛属(Eu-onymus L.)中既有藤本,又有乔木,其藤本结构与乔木相似,表现出一系列原始性和保守性。本研究初步探讨藤本与乔木的木质部结构、生活习性与生境之间的关系,为进一步研究卫矛科的系统演化提供一些解剖学的证据。

STUDIES ON COMPARATIVE WOOD ANATOMY OF 16 SPECIES OF VINES AND TREES IN CELASTRACEAE

In this paper,we made a comparison between the differences and similarities in the con- stitutions and structures of 16 species of vines and trees in Celastraceae inhabiting various growth environments and a preliminary study on the relations among the structures,living habits and growth environments of vines and trees.Our purpose is to provide some reference material for the study of the evolution trend of secondary xylem and the evolutional position of vines in taxonomy.Celastrus,Tripterygium and Monocelastrus of this family are typical in vine structure;their secondary xylem posses a higher level in specialization;members in Euonymus are vines or trees,but the vines are similar to the trees in structures,displaying a series of primitive and conservative characters.Therefore,the evolution of growth habit and that of secondary xylem of Celastraceae are non-synchronous.In addition,the constitution of elements of secondary xylem between genera are non-synchronous as well.This will provide some anatomical evidences for continuative studing on evolution of Celastraceae.