P-type sieve-element plastids present in members of the tribesTriplareae andCoccolobeae (Polygonaceae) renew the links between thePolygonales and theCaryophyllales
Autor: | H. Dietmar Behnke |
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Rok vydání: | 1999 |
Předmět: | |
Zdroj: | Plant Systematics and Evolution. 214:15-27 |
ISSN: | 1615-6110 0378-2697 |
DOI: | 10.1007/bf00985729 |
Popis: | Form-Pfs sieve-element plastids were found inTriplaris, Ruprechtia, andCoccoloba (Polygonaceae) while other genera of the family and those studied from the often associatedPlumbaginaceae contain S-type sieve-element plastids. The rareness of form-Pfs plastids among the angiosperms, their similarity to the peculiar form-P3fs plastids of theChenopodiineae, and the comparatively small plastid diameters measured for all forms present in theCaryophyllales, Polygonales, andPlumbaginales suggest close relationships between these taxa. The restriction inPolygonaceae of form-Pfs plastids to the closely allied tribesTriplareae andCoccolobeae is discussed with regard to both the intrafamilial and ordinal phylogeny, and also considering possible connections to the only magnoliidaean Pfs-taxonCanella. |
Databáze: | OpenAIRE |
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