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  • 1
    Electronic Resource
    Electronic Resource
    Stress-induced male sterility and mixed mating in the island plantCedronella canariensis (Lamiaceae) (1998)
    Springer
    Plant systematics and evolution 212 (1998), S. 159-176 
    Details
    ISSN: 1615-6110
    Keywords: Lamiaceae ; Cedronella canariensis ; Apidae ; Bombus canariensis ; Lepidoptera ; Macroglossa stellatarum ; Canary Islands ; cross-pollination ; gynodioecy ; gynomonoecy male sterility ; mixed mating system ; nectar-robbing ; self-pollination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract On the Canary Islands, we studied reproductive ecology of the perennial laurel forest herbCedronella canariensis (Lamiaceae). Flowers contained small quantities of concentrated nectar. Flower visitors were mainly bumblebees (Bombus terrestris subsp.canariensis) and lepidopterans (especiallyMacroglossa stellatarum). Their abundance, pollen load, and behaviour are reported.Cedronella canariensis was facultatively autogamous. The P:O ratio was higher than expected for a plant with a breeding system of this nature. Seed set was not pollen-limited. Selfed and outcrossed seeds differed in weight. Small, lightly coloured flowers with dysfunctional stamens appeared towards the end of the season. This male-sterility might be induced by drought.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01089737
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  • 2
    Electronic Resource
    Electronic Resource
    Male-biased sex ratio and promiscuous pollination in the dioecious island treeLaurus azorica (Lauraceae) (1998)
    Springer
    Plant systematics and evolution 212 (1998), S. 143-157 
    Details
    ISSN: 1615-6110
    Keywords: Lauraceae ; Laurus azorica ; Halictinae ; Tachinidae ; Tachina canariensis ; Canary Islands ; dioecy ; male-biased sex ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pollination ofLaurus azorica (Lauraceae), a dioecious Macaronesian tree, was studied. Male and female trees had the same size distribution. The population had 2.5 times as many male trees as females. In addition, males produced more flowers, and their inflorescences lasted longer. Individual flower lifetime and length of flowering season were the same in both sexes. Between the years of observation, one tree changed sex. Pollinators wereHalictinae bees and the flyTachina canariensis. The bees collected pollen and nectar and the fly collected nectar from both sexes. Both species visited other plants as well. The evolution of breeding systems inLauraceae is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01089736
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    Paper (German National Licenses)
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