Heterogeneity among Floral Visitors Leads to Discordance between Removal and Deposition of Pollen
نویسنده
چکیده
Devlin, B. 1989. Components of seed and pollen yield of Lobelia cardinalis: variation and correlations. American Journal of Botany 76:204-214. Devlin, B., and A. G. Stephenson. 1984. Factors that influence the duration of the staminate and pistillate phases of Lobelia cardinalis flowers. Botanical Gazette 145:323-328. Devlin, B., and A. G. Stephenson. 1985. Sex differential floral longevity, nectar secretion, and pollinator foraging in a protandrous species. American Journal of Botany 72:303310. Devlin, B., and A. G. Stephenson. 1987. Sexual variations among plants of a perfect-flowered species. American Naturalist 130: 199-218. Galen, C. 1985. Regulation of seed-set in Polemonium viscosum: floral scents, pollination, and resources. Ecology 66: 792-797. Haig, D., and M. Westoby. 1988. On limits to seed production. American Naturalist 131:757-759. Hainsworth, F. R., L. L. Wolf, and T. Mercier. 1985. Pollen limitation in a monocarpic species, Ipomopsis aggregata. Journal of Ecology 73:263-270. Horvitz, C. C., and D. W. Schemske. 1988. A test of the pollinator limitation hypothesis for a neotropical herb. Ecology 69:200-206. Janzen, D. H., P. DeVries, D. E. Gladstone, M. L. Higgins, and T. M. Lewinsohn. 1980. Self and cross pollination of Encyclia cordigera (Orchidaceae) in Santa Rosa National Park, Costa Rica. Biotropica 12:72-74. Johnston, M. 0. 1990. Natural selection, inbreeding depression and self-fertilization in two species of Lobelia with different pollinators. Dissertation. The University of Chicago, Chicago, Illinois, USA. ---. 1991. Natural selection on floral traits in two species of Lobelia with different pollinators. Evolution, in press. Jong, T. J. de, and P. G. L. Klinkhamer. 1989. Limiting factors for seed production in Cynoglossum officina/e. Oecologia (Berlin) 80:167-172. Lubbers, A. E., and N. L. Christensen. 1986. Intrasexual variation in seed production among flowers and plants of Thalictrum thalictroides (Ranunculaceae). American Journal of Botany 73:190-203.
منابع مشابه
Selection for pollination success and the mechanical fit of Impatiens flowers around bumblebee bodies
Selection on flowers has often been viewed as being particularly strict, constant, and responsible for species differences. Impatiens pallida and I. capensis flowers fit snugly around bees, leading one to expect a close relationship between floral morphology and pollination success. My studies on the amount of pollen removed from androecia and deposited on stigmas in single visits by bumblebees...
متن کاملDoes the morphological fit between flowers and pollinators affect pollen deposition? An experimental test in a buzz‐pollinated species with anther dimorphism
Some pollination systems, such as buzz-pollination, are associated with floral morphologies that require a close physical interaction between floral sexual organs and insect visitors. In these systems, a pollinator's size relative to the flower may be an important feature determining whether the visitor touches both male and female sexual organs and thus transfers pollen between plants efficien...
متن کاملAnbe/biol 356/656
Floral-color Changes Floral-color changes are common among the angiosperms. At least three non-exclusive hypotheses have been proposed to explain these changes: 1. Once flowers are adequately pollinated, further pollinator visits impair reproduction by deposition of self-pollen, dislodging of pollen, or damage to floral parts. 2. Color changes mark flowers that have been depleted of their rewar...
متن کاملAnbe/biol 356/656
Floral-color Changes Floral-color changes are common among the angiosperms. At least three non-exclusive hypotheses have been proposed to explain these changes: 1. Once flowers are adequately pollinated, further pollinator visits impair reproduction by deposition of self-pollen, dislodging of pollen, or damage to floral parts. 2. Color changes mark flowers that have been depleted of their rewar...
متن کاملComparison of pollen transfer dynamics by multiple floral visitors: experiments with pollen and fluorescent dye.
BACKGROUND AND AIMS Most plant species are visited by a diversity of floral visitors. Pollen transfer of the four most common pollinating bee species and one nectar-robbing bee of the distylous plant Gelsemium sempervirens were compared. METHODS Naturally occurring pollen loads carried by the common floral visitor species of G. sempervirens were compared. In addition, dyed pollen donor flower...
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تاریخ انتشار 2008