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  • 1
    Electronic Resource
    Electronic Resource
    Systematics of AustralianLepidium species (Brassicaceae) and implications for their origin: Evidence from IEF analysis of Rubisco (1992)
    Springer
    Plant systematics and evolution 183 (1992), S. 99-112 
    Details
    ISSN: 1615-6110
    Keywords: Brassicaceae ; Lepidium ; sectt.Dileptium ; Monoploca ; Rubisco ; IEF ; systematics ; immigration ; long-distance dispersal ; Flora of Australia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Variation in subunit polypeptide composition of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) from native AustralianLepidium taxa was analyzed by isoelectric focusing (IEF). Species of grexMonoplocoidea on the one hand, and species of gregesPseudoruderalia andPapillosa on the other, were well separated by Rubisco IEF patterns. The protein data suggest grexMonoplocoidea to be placed in sect.Monoploca whereas gregesPseudoruderalia andPapillosa should be integrated into sect.Dileptium. We suggest that the Rubisco type of American and/or AsianLepidium species was contained in those plants migrating to Australia and evolving into the recent native Australian species. Fossil pollen records and vegetation history indicate that the origin ofLepidium in Australia was restricted to the late Tertiary of Quaternary. Data presented in this study fit best with an immigration by long-distance dispersal of seeds by birds from Asia and/or from South America.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937738
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  • 2
    Electronic Resource
    Electronic Resource
    Evolution of the tetraploidCapsella bursa-pastoris (Brassicaceae): Isoelectric focusing analysis of Rubisco (1990)
    Springer
    Plant systematics and evolution 172 (1990), S. 205-213 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Brassicaceae ; Capsella ; Ribulose-1,5-bisphosphate carboxylase/oxygenase ; isoelectric focusing ; evolution ; polyploidization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco, EC 4.1.1.39) and its subunits (large subunits = LSU, small subunits = SSU) were isolated from threeCapsella spp. by gel electrophoresis and polypeptide composition was analyzed by isoelectric focusing (IEF) in the presence of 8M urea. The described techniques are recommended for large scale systematic studies. Multiple IEF banding patterns of the SSU are probably the outcome of a heterogenous multigene family. The two diploid speciesC. rubella andC. grandiflora show an identical IEF pattern and could be differentiated from the putative allotetraploidC. bursa-pastoris only by the SSU banding pattern. Uniqueness of some SSU bands in the tetraploid and in the two diploid species, respectively, may indicate an ancient alloploid origin of tetraploidC. bursa-pastoris followed by events leading to divergences in the genomes of the allotetraploid and its presumed diploid progenitors after the hybridization event (SSU gene elimination, acquisition of new SSU genes).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937807
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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