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- Title
Trade-offs between sexual and clonal reproduction in an aquatic plant: experimental manipulations vs. phenotypic correlations.
- Authors
Thompson, F. L.; Eckert, C. G.
- Abstract
That trade-offs result from the allocation of limited resources is a central concept of life history evolution. We quantified trade-offs between sexual and clonal reproduction in the aquatic plant, Butomus umbellatus, by experimentally manipulating sexual investment in two distinct nutrient environments. Increasing seed production caused a significant but nonlinear trade-off. Pollinating half of all flowers strongly reduced clonal bulbil production, but pollinating the remaining flowers did not cause any further trade-off. Trade-offs were not stronger under low nutrient conditions that clearly limited plant growth. Experimentally induced trade-offs were not reflected in negative phenotypic correlations between sexual and clonal allocation among plants within eight populations grown in a uniform greenhouse environment. Diminishing effects of increased sexual allocation plus a lack of accord between experimental manipulations and phenotypic correlations suggest that trade-offs between sexual and clonal reproduction are unlikely to constrain the evolution of reproductive strategy in this species.
- Subjects
TREE propagation; AQUATIC plants; MANIPULATIVE behavior; PHENOTYPES; UMBELLALES; FLOWERS
- Publication
Journal of Evolutionary Biology, 2004, Vol 17, Issue 3, p581
- ISSN
1010-061X
- Publication type
Article
- DOI
10.1111/j.1420-9101.2004.00701.x