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  • 1
    Electronic Resource
    Electronic Resource
    Evolution ofSedum seriesRupestria (Crassulaceae): Evidence from chloroplast DNA and biosystematic data (1994)
    Springer
    Plant systematics and evolution 190 (1994), S. 1-20 
    Details
    ISSN: 1615-6110
    Keywords: Crassulaceae ; Sedum ser.Rupestria ; Chloroplast DNA ; morphology ; allopolyploidy ; systematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Evolutionary relationships within the compariumSedum seriesRupestria (Crassulaceae) were investigated by phylogenetic analyses of restriction site variation of the chloroplast genome and morphological variation. DNAs were digested with 21 restriction enzymes and hybridized withS. album cpDNA probes covering the entire genome. A total of 141 ingroup variable restriction sites was identified. Morphological variation was observed in a total of 66 characters. Both datasets were analysed using parsimony methods and compared with evidence from cytology, artificial hybridization and biogeography to infer evolutionary relationships. The results 1) indicate a relatively high level of nucleotide sequence divergence withinS. ser.Rupestria; 2) indicate three main lines of plastome differentiation, which are in agreement with morphology, basic chromosome numbers, and centres of diversity; 3) do not provide a compelling solution for basal relationships; 4) support an earlier hypothesis on reticulation and provide evidence for a third case of allopolyploidy in the series; 5) suggest that interspecific gene flow inS. ser.Rupestria is funnelled through the presumably allopolyploidS. rupestre subsp.erectum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937855
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  • 2
    Electronic Resource
    Electronic Resource
    Alkaloids of theSedum acre-group (Crassulaceae) (1993)
    Springer
    Plant systematics and evolution 185 (1993), S. 207-217 
    Details
    ISSN: 1615-6110
    Keywords: Crassulaceae ; Sedum acre ; S. samium ; S. litoreum ; S. ser.Alpestria ; Chemotaxonomy ; pyrrolidine alkaloids ; piperidine alkaloids ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The 16 species of theSedum acre-group were investigated for the presence of alkaloids. They areS. acre ofS. ser.Acria, S. alpestre, S. annuum, S. apoleipon, S. borissovae, S. euxinum, S. grisebachii, S. laconicum, S. multiceps, S. sexangulare, S. tuberiferum, S. tuberosum, S. ursi, andS. urvillei ofS. ser.Alpestria, S. samium ofS. ser.Samia, andS. litoreum ofS. ser.Litorea. S. acre differs significantly from the other species. It contains sedamine, “hydroxy” sedamine, and a number of 2,6-disubstituted piperidine alkaloids. The leafy parts of the species ofS. ser.Alpestria, S. ser.Samia, andS. ser.Litorea contain 4 piperidine alkaloids which also occur inS. acre, and in addition 4 pyrrolidine alkaloids not present inS. acre. The composition of the alkaloid fraction agrees with the infrageneric classification (series) based on the hybridization patterns of the species (comparia).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937658
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  • 3
    Electronic Resource
    Electronic Resource
    Sedum surculosum andS. jaccardianum (Crassulaceae) share a unique 70 bp deletion in the chloroplast DNA trnL (UAA)-trnF (GAA) intergenic spacer (1994)
    Springer
    Plant systematics and evolution 193 (1994), S. 213-221 
    Details
    ISSN: 1615-6110
    Keywords: Crassulaceae ; Sedum surculosum ; S. jaccardianum ; Monanthes atlantica ; Chloroplast DNA spacer ; indels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract TrnL (UAA)-trnF (GAA) chloroplast DNA spacer sequences of three species ofMonanthes, Sedum surculosum (=Monanthes atlanticum) andS. jaccardianum were compared.S. surculosum, the systematic position of which has been disputed ever since its discovery, shares a phylogenetically highly significant 70 bp deletion withS. jaccardianum. In addition to this large deletion the two Moroccan species ofS. ser.Monanthoidea differ in three more indels as well as in four nucleotide substitutions from the species ofMonanthes. These data render strong support for the monophyly ofS. ser.Monanthoidea andMonanthes. Spacer length in seven species and one subspecies ofMonanthes is relatively uniform.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983551
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