黑龙江桔梗科种子形态学研究及分类意义

Studies on The Morphology of The Seeds of the Campanulacwea In Heilongjiang Province And Their Taxonomic Significance

本文从种子大小、颜色、结构和种皮微形态四个方面研究了本省桔梗科6属20种植物的种子。发现桔梗科植物种子在形态上变化很大,主要表现在:种子翅、大小和颜色三方面,如轮叶党参(Codonopsis lanèeolata Tratv.)的种子翅最大几乎是种子本体大小,而同属的党参(C.pilosula Nannf.)、雀斑党参(C.ussuriensis Hemsl.)的种子翅明显退化或没有。种子大小在科内没有明显的变化规律。种子颜色大致可分为两类:褐色和棕色。扫描电镜研究表明桔梗科种子在微形态上如细胞排列方式、细胞形状和垂周壁上有着明显的差异,如亲缘关系较密切的风铃草属(Campanula L.)和沙参属(Adenophora Fisch.)在这几方面表现了明显的不同。

This paper deals with morphological studies on size, colour, structureand micromorphology of the seeds in 6 gen. 20sp. of the Campanulaceae. It isdiscoverd that form of the seeds is variable in seed wing, size, and colour.For example: Seed wing of Codonopsis lanceolata Trautv. is the biggest bei-ng equal to seed size, and other two species of same genus have very smallseed wing or not. Seed wing changes irregularlly in the Campanulaceae. Seedcolour can be grouped into two sorts. The SEM has revealed that micromo-rphology is different in the Campanulaceae such as patterns, outline andanticlinal walls of the cells.