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  • 1
    Electronic Resource
    Electronic Resource
    Female-biased sex allocation in relation to growth rate of fruit in Erythronium japonicum (1998)
    Springer
    Oecologia 117 (1998), S. 391-395 
    Details
    ISSN: 1432-1939
    Keywords: Key wordsErythronium japonicum ; Female-biased sex allocation ; Hermaphroditic plants ; Sink-limited fruit growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Using four populations of the liliaceous perennial Erythronium japonicum, I examined the hypothesis that sex allocation will be female-biased if the duration of sink-limited growth of fruits, during which fruits grow exponentially, is long. I found that all marked fruits in each population had a period of sink-limited growth. Among the four populations, the mean length of sink-limited growth increased, and the mean dry mass ratio of the sum of the corolla and androecium/fruit decreased, in a consistent order. Thus, plants in populations where the duration of sink-limited growth was long allocated relatively more of their resources to their female functions. This result was consistent with the above hypothesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420050672
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  • 2
    Electronic Resource
    Electronic Resource
    A model for nectar secretion in animal-pollinated plants (1993)
    Springer
    Evolutionary ecology 7 (1993), S. 394-400 
    Details
    ISSN: 1573-8477
    Keywords: nectar secretion ; pollination ; game theoretic model ; flower size ; interplant competition ; interpatch competition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A game theoretic model was developed for nectar secretion in animal-pollinated plants in order to examine how the total amount of resources allocated to flowers affects the spread of nectarless plants. It was assumed that pollinators concentrate on patches whose nectar rewards are relatively large compared to other patches and if pollinators visit a patch, they concentrate on the plants whose nectar rewards are relatively large compared to other plants in the patch. It was shown that plants are more likely to secrete nectar in populations where the total amount of resources allocated to flowers is large. It was also shown that strong interplant competition, strong interpatch competition and the nectar discrimination of the pollinators are also important factors for nectar secretion. However, if the total amount of resources allocated to flowers is sufficiently large, plants would secrete nectar even if competition is not very strong and nectar discrimination is not so precise.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01237870
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    Paper (German National Licenses)
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