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Effects of pollination and pollen source on the seed set ofPedicularis palustris

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Abstract

Habitat alteration can deteriorate plant-pollinator interactions and thereby increase the risk of population extinction. As part of a larger study on the effects of changes in land use on fen grassland vegetation, factors influencing the seed set of a short-lived, endangered wetland plant,Pedicularis palustris, were studied. We conducted field pollination experiments in one large and one small population. To investigate the effect of pollen source on seed set, individual flowers of caged plants were left unpollinated or were pollinated with pollen from the same flower, the same population or another population. To study pollen limitation and flower display, whole plants were subjected to pollinator exclosure, hand pollination or natural pollination. Self-compatibility was high, but differed between populations (61% and 97% of seed set after cross-pollination within populations). Cross-pollination between populations did not significantly alter seed number per capsule. Pollinator exclosure resulted in a very low seed set (<15% of natural seed set), despite high self-compatibility. The most likely explanations for high self-compatibility in combination with low autofertility are geitonogamy as reproductive assurance, selective neutrality of self-compatibility and phylogenetic constraints. Because of low autofertility, the seed set inP. palustris depends on pollinators. In the study populations, natural pollination was clearly sufficient for maximum seed production per plant, but seed set per capsule was significantly pollen-limited in the smaller population. Plants in this population also had a higher maximum percentage of simultaneously open flowers than those of the large population (31% vs. 13%), while flower longevity was generally extended without pollination. It is concluded thatP. palustris may influence pollinator behaviour and therefore the risk of pollen limitation by flower display.P. palustris showed a flexible reaction to differing pollination regimes without losses in overall seed set in the study populations.

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References

  • Bierzychudek P. (1981): Pollinator limitation of plant reproductive effort.Amer. Naturalist 117: 838–840.

    Article  Google Scholar 

  • Burd M. (1994): Bateman’s principle and plant reproduction: The role of pollen limitation in fruit and seed set.Bot. Rev. 60: 83–119.

    Article  Google Scholar 

  • Caro T.M. &Laurenson K. (1994): Ecological and genetic factors in conservation: A cautionary tale.Science 263: 485–486.

    Article  PubMed  CAS  Google Scholar 

  • Corbet S.A. (1998): Fruit and seed production in relation to pollination and resources in bluebell,Hyacinthus non-scripta. Oecologia 114: 349–360.

    Article  Google Scholar 

  • Crawley M. (1997):Plant ecology. Blackwell Science, Oxford.

    Google Scholar 

  • Damgaard C., Couvet D. &Loeschke V. (1992): Partial selfing as an optimal mating strategy.Heredity 69: 289–295.

    Google Scholar 

  • Darwin C. (1902):The effects of cross and self fertilization in the vegetable kingdom. Appleton, New York.

    Google Scholar 

  • Delph L.F. (1986): Factors regulating fruit and seed production in the desert annualLesquerella gordonii.Oecologia 69: 471–476.

    Article  Google Scholar 

  • Dreisig H. (1995): Ideal free distributions of nectar foraging bumble-bees.Oikos 72: 161–172.

    Article  Google Scholar 

  • Eckert C.G. &Schaefer A. (1998): Does self-pollination provide reproductive assurance inAquilegia canadensis (Ranunculaceae)? Amer. J. Bot. 85: 191–124.

    Article  Google Scholar 

  • Eriksen B., Molau U. &Svennson M. (1993): Reproductive strategies in two arcticPedicularis species (Scrophulariaceae).Ecography 16: 154–166.

    Article  Google Scholar 

  • Garwood N.C. &Horwitz C.C. (1985): Factors limiting fruit and seed production of a temperate shrubStaphylea trifolia (Staphyleaceae).Amer. J. Bot. 72: 453–466.

    Article  Google Scholar 

  • Gibbons J.D. (1997):Nonparametrics for quantitative analysis. American Sciences, Columbus.

    Google Scholar 

  • Gilpin M.E. &Soulé M.E. (1986): Minimum viable populations: processes of species extinction. In:Soulé M.E. &Wilcox B.A. (eds.),Conservation biology, Sinauer Associates, Sunderland, pp. 19–34.

    Google Scholar 

  • Haig D. &Westoby M. (1988): On limits to seed production.Amer. Naturalist 131: 757–759.

    Article  Google Scholar 

  • Handel S. (1983): Pollination ecology, plant population structure, and gene flow. In:Real L. (ed.),Pollination biology, Academic Press, Orlando, pp. 163–212.

    Google Scholar 

  • Hartl D. (1974):Scrophulariaceae. In:Hegi G. (ed.),Illustrierte Flora von Mitteleuropa 6/2, Hanser, München, pp. 261–272, 276–280.

    Google Scholar 

  • Heinrich B. &Raven P.H. (1972): Energetics and pollination ecology.Science 176: 597–602.

    Article  PubMed  Google Scholar 

  • Horn M. &Vollandt R. (1995):Multiple Tests und Auswahlverfahren. Gustav Fischer, Stuttgart.

    Google Scholar 

  • Huenneke L. F. (1991): Ecological implications of genetic variation in plant populations. In:Falk D.A. &Holsinger K.H. (eds.),Genetics and conservation of rare plants, Oxford University Press, Oxford, pp. 31–44.

    Google Scholar 

  • Inouye D.W. (1978): Resource partitioning in bumble-bees: Experimental studies of foraging behaviour.Ecology 59: 672–678.

    Article  Google Scholar 

  • Jain S.K. (1976): The evolution of inbreeding in plants.Annual Rev. Ecol. Syst. 7: 469–495.

    Article  Google Scholar 

  • Jennersten O. (1988): Pollination inDianthius deltoides (Caryophyllaceae): Effects of habitat fragmentation on visitation and seed set.Conservation Biol. 2: 359–366.

    Article  Google Scholar 

  • Jensen K. &Schrautzer J. (1999): Consequences of abandonment for a regional fen flora and mechanisms of successional change.Appl. Veg. Sci. 2: 79–88.

    Article  Google Scholar 

  • Koeman-Kwak M. (1973): The pollination ofPedicularis palustris by nectar thieves (short-tongued bumble-bees).Acta Bot. Neerl. 22: 608–615.

    Google Scholar 

  • Korneck D., Schnittler M. &Vollmer I. (1996): Rote Liste der Farn & Blütenpflanzen Deutschlands. In:Bundesamt für Naturschutz (ed.), Rote Liste gefährdeter Pflanzen Deutschlands,Schriftenreihe Vegetationsk. 28: 27–187.

    Google Scholar 

  • Kunin W. (1993): Sex and the single mustard: Population density and pollinator behaviour on seed set.Ecology 74: 2145–2160.

    Article  Google Scholar 

  • Kunin W. (1997): Population size and density effects in pollination: pollinator foraging and plant reproductive success in experimental arrays ofBrassica kaber.J. Ecol. 85: 225–234.

    Article  Google Scholar 

  • Kwak M. (1977): Pollination ecology of five hemiparasitic, large floweredRhinanthoideae with special reference to the behaviour of nectar-thieving short-tongued bumble-bees.Acta Bot. Neerl. 26: 97–107.

    Google Scholar 

  • Kwak M.M. (1979): Effects of bumble-bee visits on the seed set ofPedicularis, Rhinanthus andMelampyrum in the Netherlands.Acta Bot. Neerl. 28: 177–195.

    Google Scholar 

  • Kwak M.M. &Jennersten O. (1991): Bumble-bee visitation and seed set inMelampyrum pratense andViscaria vulgaris: heterospecific pollen and pollen limitation.Oecologia 86: 99–104.

    Article  Google Scholar 

  • Laverty T.M. (1992): Plant interactions for pollinator visits: a test of the magnet species effect.Oecologia 89: 502–508.

    Google Scholar 

  • Lloyd D.G. &Schoen D.J. (1992): Self- and cross-fertilization in plants. I. Functional dimensions.Int. J. Pl. Sci. 153: 358–369.

    Article  Google Scholar 

  • Lloyd D.G. (1992): Self- and cross-fertilization in plants. II. The selection of self-fertilization.Int. J. Pl. Sci. 153: 370–380.

    Article  Google Scholar 

  • Macior L.W. (1982): Plant community and pollinator dynamics in the evolution of pollination mechanisms inPedicularis (Scrophulariaceae). In:Armstrong J.A., Powell J.M. &Richards A.L. (eds.),Pollination and evolution, Royal Botanic Gardens, Sydney, pp. 29–45.

    Google Scholar 

  • Macior L.W. (1993): Pollination ecology ofPedicularis palustris L. (Scrophulariaceae) in North America.Pl. Spec. Biol. 8: 35–44.

    Article  Google Scholar 

  • Odasz A.M. &Savolainen O. (1996): Genetic variation in populations of the arctic perennialPedicularis dasyantha on Svalbard, Norway.Amer. J. Bot. 83: 1379–1385.

    Article  Google Scholar 

  • Ohashi K. &Yahara T. (1998): Effects of variation in flower number on pollinator visits inCirsium purpuratum (Asteraceae).Amer. J. Bot. 85: 219–224.

    Article  Google Scholar 

  • Oostermeijer J.G.B., Altenburg R.G.M. &den Nijs H.C.M. (1995): Effects of outcrossing distance and selfing on fitness components in the rareGentinana pneumonanthe (Gentianaceae).Acta Bot. Neerl. 44: 257–268.

    Google Scholar 

  • Petanidou T., den Nijs H.C.M. &Oostermeijer J.G.B. (1995): Pollination ecology and constraints on seed set of the rare perennialGentianana cruciata L. in the Netherlands.Acta Bot. Neerl. 44: 55–74.

    Google Scholar 

  • Petrů M. &Lepš J. (2000): Regeneration dynamics in populations of two hemiparasiticPedicularis species in wet grasslands. In:White P.S., Mucina L., Lepš J. &van der Maarel E. (eds.),Vegetation science in retrospect and perspective, Proceedings of the 41th Symposium of IAVS, Opulus press, Uppsala (in press).

    Google Scholar 

  • Phillipp M., Woddell S.R.J., Böcher J. &Mattson O. (1996): Reproductive biology of four species ofPedicularis (Scrophulariaceae) in West Greenland.Arctic Alpine Res. 28: 403–413.

    Article  Google Scholar 

  • Rixen C. &Trepel M. (2000): The impact of wetland restoration on the fen vegetation of Lake Hohn, northern Germany. In:White P.S., Mucina L., Lepš J. &van der Maarel E. (eds.),Vegetation science in retrospect and perspective, Proceedings of the 41th Symposium of IAVS, Opulus press, Uppsala (in press).

    Google Scholar 

  • Rosenthal G. &Fink S. (1996):Pedicularis palustris L. im Bremer Gebiet- Verbreitung, Ökologie und Rückgangsursachen.Abh. Naturwiss. Vereins Bremen 43: 429–447.

    Google Scholar 

  • Schmidt K. &Jensen K. (2000): Genetic structure and AFLP variation of remnant populations in the rare plantPedicularis palustris (Scrophulariaceae) and its relation to population size and reproductive components.Amer. J. Bot. 87: 678–689.

    Article  CAS  Google Scholar 

  • Sokal R.R. &Rohlf F.J. (1995):Biometry. Freeman, New York.

    Google Scholar 

  • Sprague E.F. (1962): Pollination and evolution inPedicularis (Scrophulariaceae).Aliso 5: 181–209.

    Google Scholar 

  • Thompson K., Bakker J.P. &Bekker R.M. (1997):The soil seed banks of North West Europe: methodology, density and longevity. Cambridge University Press, Cambridge.

    Google Scholar 

  • van Treuren R., Bijlsma R., Ouborg N.J. &Delden W. van (1993): The significance of genetic erosion in the process of extinction: IV. Inbreeding depression and heterosis effects caused by selfing and outcrossing inScabiosa columbaria.Evolution 47: 1669–1680.

    Article  Google Scholar 

  • Wagner J. &Mitterhofer V. (1998): Phenology, seed development, and reproductive success of an Alpine population ofGentianella germanica in climatically varying years.Bot. Acta 111: 159–166.

    Google Scholar 

  • Willems J.H. &Lahtinen M.-L. (1997): Impact of pollination and resource limitation on seed production in a border population ofSpiranthes spiralis (Orchidaceae),Acta Bot. Neerl. 46: 365–375.

    Google Scholar 

  • Williams J.B. &Batzli G.O. (1982): Pollination and dispersion of 5 species of lousewort (Pedicularis) near Atkasook, Alaska, USA.Arctic Alpine Res. 14: 59–74.

    Article  Google Scholar 

  • Young A., Boyle T &Brown T. (1996): The population genetic consequences of habitat fragmentation for plants.Trends Ecol. Evol. 11: 413–418.

    Article  Google Scholar 

  • Zimmermann M. &Pyke G.H. (1988): Reproduction inPolemonium: assessing the factors limiting seed set.Amer. Naturalist 131: 723–738.

    Article  Google Scholar 

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  1. Sophie Karrenberg

    Present address: Geobotanisches Institut ETH, Zürichbergstrasse 38, CH-8044, Zürich, Switzerland

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  1. Ecology Research Centre, University of Kiel, Schauenburgerstrasse 112, D-24118, Kiel, Germany

    Sophie Karrenberg & Kai Jensen

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Karrenberg, S., Jensen, K. Effects of pollination and pollen source on the seed set ofPedicularis palustris . Folia Geobot 35, 191–202 (2000). https://doi.org/10.1007/BF02803097

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