江西古樟枝叶形态多样性初探

选取10个形态学性状,应用数量分类学方法对江西省安义、安福、瑞金、婺源、铅山5个地区共151株古樟标本进行研究。将数量分类学中的Q聚类应用于5个地区共151份样本的分类,对选取的10个性状进行了R型聚类分析,且对这10个性状进行主成分分析。结果表明：同一地区以及不同地区的古樟之间的差异性不明显,也即古樟在枝叶形态上的相似度很大,依据现有样本和条件暂时无法把古樟分出不同的类群。不过古樟从性状上有两大类型,叶片存在边缘波状和不波的两种情况,此性状在古樟叶片中表现出较强的规律性。本研究为今后利用枝叶形态探讨樟科植物的系统分类和演化方式提供有利的依据。

A Preliminary Research on Morphological Characteristics of Branches and Leaves Diversity of Ancient Camphor-trees in Jiangxi Province

10 morphologic characters of 151 ancient camphor-tree leaves samples in Anyi, Anfu, Ruijin, Wuyuan and Yanshan of Jiangxi province were studied with the numerical taxonomic methods. The Q cluster analysis method wa applied to classify the 151 samples, and the ten characters were analyzed by R cluster as well as principal components analysis method. The result indicated that the ancient camphor-trees can not be divided into different groups based on the present samples and condition because the leaves＇ shape of ancient camphor-trees has high similarity. However, the shapes of ancient camphor-trees showed two types： the edge of leaves is waved or non-waved. This character has a strong regularity in the ancient camphor-trees leaves. It providea a favorable basis for the future study of system classification and evolution manner of the plants in Lauraceae.