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  • Articles  (2)
  • Biomass  (1)
  • Genet architecture  (1)
  • Global change
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  • Oxford University Press
  • 1985-1989  (2)
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  • Springer  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 72 (1987), S. 291-296 
    ISSN: 1432-1939
    Keywords: Abutilon ; Biomass ; Reproduction ; Light Nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The response of twenty maternal families of the annual Abutilon theophrasti to two resource gradients, nutrient and light, was investigated. The structure of the population niche for both biomass and reproductive output was found to be quite different on the two gradients. On the light gradient there was a great diversity of responses among the families while on the nutrient gradient the families responded in a similar manner. On both gradients the plants showed a significant genotype/environment interaction. Three strategies for the production of seed variation have been proposed-all offspring are adapted to the same restricted environment, each offspring of an individual is adapted to a particular environment somewhat different thant that of its siblings, and all the offspring are able to grow in a wide range of environments. We found evidence for all three of these strategies amongst the families. The range of responses seen amongst families (of the same species) in this study was as broad as that found in previous studies among species of the old field annual community to which Abutilon theophrasti belongs. This has significant implications to the nature of competitive interactions and to the evolution of differential resource use in plant populations.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1939
    Keywords: Clonal growth ; Genet architecture ; Leaf demography ; Sexual reproduction ; Solidago
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Members of the genus Solidago are among the most widely studied model systems in plant population biology. A comparative study of Solidago canadensis, S. altissima, and S. gigantea in an experimental garden showed that the three species had different patterns of shoot growth and development, leaf morphology and physiology, and biomass allocation at harvest. These differences were also found in the field. Contrary to some current taxonomic usage, our results show that S. canadensis should ecologically be treated as a separate taxon distinct from S. altissima, and that the latter may be grouped together with S. gigantea. Many of the biological differences between S. canadensis and the other two taxa, such as differential investment into sexual reproduction versus clonal growth, may be explained by differences in genet architecture. These architectures concern high compared to lower within-genet shoot density resulting from differences in rhizome lengths among the taxa (shorter in S. canadensis than in S. altissima and S. gigantea).
    Type of Medium: Electronic Resource
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