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凤仙花属种子形态及其在分类学上的意义

鲁迎青, 陈艺林   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1991-05-10 发布日期:1991-05-10
  • 通讯作者: 鲁迎青

Seed Morphology of Impatiens L. (Balsaminaceae) and Its Taxonomic Significance

Lu Ying-Qing, Chen Yi-Ling   

  • Received:1900-01-01 Revised:1900-01-01 Online:1991-05-10 Published:1991-05-10
  • Contact: Lu Ying-Qing

摘要:

本文首次记载了对分布于峨眉山的凤仙花属Impatiens 12种植物的种子表面显微结构的观察,
并分析了种子表面形态在该属种水平上的分类价值及可能的系统学意义。种皮表层细胞特化、排列方
式、隆起状态、种脊上近合点端的突起、种子末端附属物的有无及其形态等性状被视为凤仙花属种子表
面的主要特征。依据这些性状12种凤仙花种子形态分为两种类型:1.种子表面光滑,无明显大、小细胞
分化。如白花凤仙I.wilsoni可能具3沟花粉凤仙花的种子形态的特点。2.表面粗糙,有明显大、小细
胞的分化及不同程度的细胞隆起,并呈现出多种特异形态.这代表了以一年生草本,4沟花粉为特点的
凤仙花种子形态特征。种子特征与植物体习性、花形态及花粉形态相关,在一定程度上反映了属内类群
的分化,因而在凤仙花科、属的分类和系统研究中是不可忽视的性状。

关键词: 凤仙花属, 种子表面, 分类学

Abstract:

The seed surface of 12 species of Impatiens L. from Mt. Omei was observed under
SEM for the first time. The important characters used in the paper include cell specialization
on seed surface, arrangement pattern of the cells, the degree of the cell elevation, chalazal
zone morphology and appendix at the tail of the seed. According to these characters, the seed
surface morphology of 12 species can be divided into two types: 1. the seed without conspicu-
ous differentiation of surface cells, laevigate on the surface, represented by I. wilsoni; the
seeds of species indicated by 3-colpate pollen grains are expected to belong to the type. 2. the
seed with the large cell elevation at different levels, surface scabrous, represented by the other
11 species; most species with 4-colpate pollen have this kind of seeds. The results verify that
the seed morphology of the genus can supply characters significant to taxonomy of the genus
at species level. The evolution of seed surface of Impatiens has close correlation with that of
the flower and pollen morphology.

Key words: Impatiens, Seed Surface, Taxonomy