叶籽银杏叶形态特性研究

本研究以来自沂源县中国首次发现的叶籽银杏为试材,对其叶的形态特性进行了研究。结果表明,发育期内叶生拟胚珠叶的叶长、叶宽、叶鲜重和叶面积均较正常叶小,但两者的叶柄长几乎没有差异。遗传距离聚类分析结果表明,正常叶各形态指标分为3类,叶生拟胚珠叶分为2类。正常叶叶宽与叶鲜重的相关性最大,叶生拟胚珠叶叶长与叶鲜重的相关性最大。本文对叶籽银杏的形态学本质进行了讨论。

Studies on the Morphological Characteristics on the Leaf of Ginkgo Biloba var.Epiphylla Mak.

The morphological characteristics on the leaf of Ginkgo biloba var.epiphylla Mak.,the one which was firstly found at Yiyuan county of Shandong province in China,were studied in the paper.The results of analyses showed that the leaf length,leaf width,leaf fresh weight and leaf area of the leaf with ovule-like organ were all smaller than those of normal leaf,but there was almost no differences in petiole length between them.The results of cluster analysis of genetic distance showed that all the morphological indexes of normal leaf could be divided into 3 groups,and those of the leaf with ovule-like organ was divided into 2 groups.The leaf width had most correlation with leaf fresh weight of normal leaf,and the leaf length had most correlation with leaf fresh weight of the leaf with ovule-like organ.The morphological essence of Ginkgo biloba var.epiphylla Mak.was discussed in this paper.