Seasonal pollen flow and progeny diversity in Amianthium muscaetoxicum: ecological potential for multiple mating in a self-incompatible,hermaphroditic perennial |
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Authors: | Mary Palmer Joseph Travis Janis Antonovics |
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Affiliation: | (1) Mountain Lake Biological Station, University of Virginia, 22901 Charlottesville, VA, USA;(2) Department of Biological Science, Florida State University, 32306-2043 Tallahassee, FL, USA;(3) Department of Botany, Duke University, 27706 Durham, NC, USA;(4) Present address: 1747 Church St. NW, 20036 Washington, DC, USA |
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Abstract: | Summary The ecological potential for multiple mating is high in Amianthium muscaetoxicum. The percentage of long-distance pollinations (20–100 m) is greater than reported for most insect-pollinated systems. Estimations of neighborhood area are at least an order of magnitude larger than any previously reported for plant species. Seasonal effects on fluorescent dust dispersal indicate that neighborhood areas change during the flowering season. The number of flowers marked with fluorescent dust on an inflorescence increases with increasing inflorescence size, and the proportions of available inflorescences that are marked decrease with distance from the source. Allozyme analysis indicates that heterozygosity levels are typical of outcrossing plants. The diversity of seed genotypes is increased by increasing the size of the floral display. The present investigation is the first to consider the effects of floral display on seed diversity and adds to existing data indicating that inflorescence size is important to fecundity and/or pollen donation in some systems. |
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Keywords: | Amianthium muscaetoxicum Inflorescence size Pollen flow Progeny diversity Seasonal effects |
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