Advanced search
1 file | 755.57 KB

Importance of autonomous selfing is inversely related to population size and pollinator availability in a monocarpic plant

Rein Brys (UGent), Eske De Crop (UGent), Maurice Hoffmann (UGent) and Hans Jacquemyn
(2011) AMERICAN JOURNAL OF BOTANY. 98(11). p.1834-1840
Author
Organization
Abstract
Premise of the study: In animal-pollinated plants, autonomous selfi ng may provide reproductive assurance when pollinators or reproductive partners are limited. Under such circumstances, the contribution of pollinator-mediated seed set to total seed production also may be more variable compared with situations in which pollinator abundances are high or populations consist of large numbers of individuals. Despite the widespread acceptance of the reproductive assurance hypothesis, only limited empirical evidence exists that autonomous selfi ng confers reproductive output and guarantees constant seed set under variable pollination environments. Methods: We performed emasculation experiments in 22 populations of the short-lived, monocarpic plant Centaurium erythraea in a fragmented dune landscape. Key results: Floral emasculations resulted in a significantly lower seed set compared with that of intact flowers. Seed set in emasculated flowers also declined signifi cantly with decreasing population size and pollinator availability, whereas seed set of intact flowers did not depend on population size nor on pollinator availability. Variability in seed set among individuals was significantly lower in intact than in emasculated flowers and decreased signifi cantly with increasing population size when flowers were emasculated but not in intact flowers. Conclusions: These results indicate that pollinator-mediated seed set is strongly dependent both on population size and on pollinator availability but that reproductive assurance through autonomous selfing guarantees relatively constant levels of total seed production, even when populations are small and/or pollinator limited. High variation in seed set of emasculated flowers suggests strong unpredictability in pollinator services in small populations.
Keywords
mixed mating, pollination limitation, hoverflies, delayed selfing, floral emasculation, MIXED MATING SYSTEMS, REPRODUCTIVE ASSURANCE, INBREEDING DEPRESSION, INTERSPECIFIC POLLEN TRANSFER, reproductive assurance, CROSS-FERTILIZATION, EVOLUTION, COMPETITION, FOREST, CONSEQUENCES, GEITONOGAMY

Downloads

    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 755.57 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Brys, Rein, Eske De Crop, Maurice Hoffmann, and Hans Jacquemyn. 2011. “Importance of Autonomous Selfing Is Inversely Related to Population Size and Pollinator Availability in a Monocarpic Plant.” American Journal of Botany 98 (11): 1834–1840.
APA
Brys, R., De Crop, E., Hoffmann, M., & Jacquemyn, H. (2011). Importance of autonomous selfing is inversely related to population size and pollinator availability in a monocarpic plant. AMERICAN JOURNAL OF BOTANY, 98(11), 1834–1840.
Vancouver
1.
Brys R, De Crop E, Hoffmann M, Jacquemyn H. Importance of autonomous selfing is inversely related to population size and pollinator availability in a monocarpic plant. AMERICAN JOURNAL OF BOTANY. 2011;98(11):1834–40.
MLA
Brys, Rein, Eske De Crop, Maurice Hoffmann, et al. “Importance of Autonomous Selfing Is Inversely Related to Population Size and Pollinator Availability in a Monocarpic Plant.” AMERICAN JOURNAL OF BOTANY 98.11 (2011): 1834–1840. Print.
@article{1989301,
  abstract     = {Premise of the study: In animal-pollinated plants, autonomous selfi ng may provide reproductive assurance when pollinators or reproductive partners are limited. Under such circumstances, the contribution of pollinator-mediated seed set to total seed production also may be more variable compared with situations in which pollinator abundances are high or populations consist of large numbers of individuals. Despite the widespread acceptance of the reproductive assurance hypothesis, only limited empirical evidence exists that autonomous selfi ng confers reproductive output and guarantees constant seed set under variable pollination environments.
Methods: We performed emasculation experiments in 22 populations of the short-lived, monocarpic plant Centaurium erythraea in a fragmented dune landscape.
Key results: Floral emasculations resulted in a significantly lower seed set compared with that of intact flowers. Seed set in emasculated flowers also declined signifi cantly with decreasing population size and pollinator availability, whereas seed set of intact flowers did not depend on population size nor on pollinator availability. Variability in seed set among individuals was significantly lower in intact than in emasculated flowers and decreased signifi cantly with increasing population size when flowers were emasculated but not in intact flowers.
Conclusions: These results indicate that pollinator-mediated seed set is strongly dependent both on population size and on pollinator availability but that reproductive assurance through autonomous selfing guarantees relatively constant levels of total seed production, even when populations are small and/or pollinator limited. High variation in seed set of emasculated flowers suggests strong unpredictability in pollinator services in small populations.},
  author       = {Brys, Rein and De Crop, Eske and Hoffmann, Maurice and Jacquemyn, Hans},
  issn         = {0002-9122},
  journal      = {AMERICAN JOURNAL OF BOTANY},
  keyword      = {mixed mating,pollination limitation,hoverflies,delayed selfing,floral emasculation,MIXED MATING SYSTEMS,REPRODUCTIVE ASSURANCE,INBREEDING DEPRESSION,INTERSPECIFIC POLLEN TRANSFER,reproductive assurance,CROSS-FERTILIZATION,EVOLUTION,COMPETITION,FOREST,CONSEQUENCES,GEITONOGAMY},
  language     = {eng},
  number       = {11},
  pages        = {1834--1840},
  title        = {Importance of autonomous selfing is inversely related to population size and pollinator availability in a monocarpic plant},
  url          = {http://dx.doi.org/10.3732/ajb.1100154},
  volume       = {98},
  year         = {2011},
}

Altmetric
View in Altmetric
Web of Science
Times cited: