首页   按字顺浏览 期刊浏览 卷期浏览 Chemical composition and ultrastructure of fossil and extant salvinialean microspore ma...
Chemical composition and ultrastructure of fossil and extant salvinialean microspore massulae and megaspores

 

作者: PimF. Van Bergen,   MargaretE. Collinson,   JanW. de Leeuw,  

 

期刊: Grana  (Taylor Available online 1993)
卷期: Volume 32, issue sup1  

页码: 18-30

 

ISSN:0017-3134

 

年代: 1993

 

DOI:10.1080/00173139309427448

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

The resistant remains of salvinialean microspore massulae and megaspores have been analyzed using scanning and transmission electron microscopy and Curie-point pyrolysis. The results show a selective enrichment of specific tissues in the fossil samples. The resistant compound, sporopollenin, in these fossil remains, is shown to consist of an oxygenated aromatic, and an aliphatic moiety. The latter is selectively enriched during diagenesis and upon oxidation. The organic matter of the extant samples is dominated by compounds which, during diagenesis, are selectively removed. The morphologically distinct megaspores and microspores are chemically comparable. Furthermore, although the genera studied are strongly distinctive in morphology and ultrastructure, the variation in their chemistry is too small to use for chemotaxonomy.

 

点击下载:  PDF (2957KB)



返 回