Phylogenetic and chemotaxonomic significance of diterpenes in some Portulaca species (Portulacaceae)

Citation
A. Ohsaki et al., Phylogenetic and chemotaxonomic significance of diterpenes in some Portulaca species (Portulacaceae), BIOCH SYST, 27(3), 1999, pp. 289-296
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biology
Journal title
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
ISSN journal
0305-1978 → ACNP
Volume
27
Issue
3
Year of publication
1999
Pages
289 - 296
Database
ISI
SICI code
0305-1978(199904)27:3<289:PACSOD>2.0.ZU;2-T
Abstract
An instance is presented in which skeletal features of chemical constituent s provide valuable information on the phylogenetic relationship in plant sp ecies. A close examination of diterpenoid constituents was carried out on t hree Portulaca species, each of which has a different basic chromosome numb er. Major diterpenoid constituents in P. cv. Jewel, P. pilosa and P. grandi flora were found to be, respectively, of the clerodane ([6.6]-fused ring), prinziane ([7.6]-fused ring) and portulane ([7.5]-fused ring) types. From a biosynthetic viewpoint, a linear evolutionary relationship among the Portu laca plants in question would be assumed. All the diterpenoids found in the above three species have 1,4-dihydroxy-2-buten-2-ylethyl side chains and t he relevance of this feature for chemical systematics of Portulaca plants i s pointed out. (C) 1999 Elsevier Science Ltd. All rights reserved.