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Variation in seed dormancy of the wetland sedge, Carex elongata, between populations and individuals in two consecutive years

Published online by Cambridge University Press:  22 February 2007

Wolfgang Schütz  and
Gerhard Rave
Wolfgang Schütz*
Affiliation:
Botanisches Institut der Universität Basel, Schönbeinstr. 6, Basel, CH-4056, Switzerland
Gerhard Rave
Affiliation:
Variationsstatistik,Christian-Albrechts-Universität, Olshausenstr. 40, Kiel, D-24098, Germany
*
*Correspondence: Fax: +41 (0) 61 267 35 04 Email: [email protected];
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Abstract

Variation in dormancy of the wetland sedge, Carex elongata L., was tested using seeds from three wild populations and the garden-grown progeny of one population. Germination experiments, comprising four combinations of temperature and light, were conducted either with fresh-matured or cold-stratified seeds, to assess the relative contribution of populations and mother plants to the total variation. Between-year variation was tested at the population level and, partly, at the individual level, using seeds collected in two consecutive years. Among-population variation accounted for 72%, and among-individual variation for 23%, of the total variance in the first experiment. Significant differences were apparent between one wild population and its garden-grown descendants. Differences in germinability among populations were maintained in the two consecutive years, but a proportion of the variance was due to the contribution of the maternal environment. Weak evidence for genetic control at the individual level was shown by a correlation across years in one population. However, the lack of a main effect at the individual level in the first experiment makes it difficult to assess the relative contribution of the mother plants to the total variation. Our results imply that germination patterns of C. elongata have a genetic basis, but are markedly modified by environmental conditions.

Keywords

Carexdormancy variationgenetic controlgerminationpopulation
Type
Research Article
Information
Seed Science Research , Volume 13 , Issue 4 , December 2003 , pp. 315 - 322
Copyright
Copyright © Cambridge University Press 2003

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References

Acharya, S.N., Chu, C.B. and Hermesh, R. (1989) Effects of population, environment and their interaction on Saskatoon Berry (Amelanchier alnifolia Nutt.) seed germination. Canadian Journal of Plant Science 69, 277–284.CrossRefGoogle Scholar
Andersson, L. and Milberg, P. (1998) Variation in seed dormancy among mother plants, populations and years of seed collection. Seed Science Research 8, 29–38.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1973) Plant population differences in dormancy and germination characteristics of seeds: heredity or environment? American Midland Naturalist 90, 493–498.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (1975) Year-to-year variation in the germination of freshly-matured seeds of Arenaria patula var. robusta from the same site. Journal of the Tennessee Academy of Science 50, 106–108.Google Scholar
Beckstead, J., Meyer, S.E. and Allen, P.S. (1996) Bromus tectorum seed germination: between-population and between-year variation. Canadian Journal of Botany 74, 875–882.CrossRefGoogle Scholar
Bodeux, A. (1955) Alnetum glutinosae. Mitteilungen der Floristisch-soziologischen Arbeitsgemeinschaft 5, 114–157.Google Scholar
Bosbach, K., Hurka, H. and Haase, R. (1982) The soil seed bank of Capsella bursa-pastoris (Cruciferae); its influence on population variability. Flora 172, 47–56.CrossRefGoogle Scholar
Evans, A.S. and Cabin, R.J. (1995) Can dormancy affect the evolution of post-germination traits? The case of Lesquerella fendleri. Ecology 76, 344–356.CrossRefGoogle Scholar
Garbutt, K. and Witcombe, J.R. (1986) The inheritance of seed dormancy in Sinapis arvensis L. Heredity 56, 25–31.CrossRefGoogle Scholar
Hegi, G. (1980) Illustrierte Flora von Mitteleuropa, Vol. 2 (1), (3rd edition). Berlin, Parey.Google Scholar
Jana, S. and Naylor, J.M. (1980) Dormancy studies in seed of Avena fatua. 11. Heritability for seed dormancy. Canadian Journal of Botany 58, 91–93.CrossRefGoogle Scholar
Jankovska, V. and Rybnicek, K. (1988) The genus Carex in the Late Glacial and Holocene of Czechoslovakia. Aquatic Botany 30, 23–38.CrossRefGoogle Scholar
Littell, R.C., Milliken, G.A., Stroup, W.W. and Wolfinger, R.D. (1996) SAS system for mixed models. Cary, NC, SAS Inc.Google Scholar
Meyer, S.E. and Allen, P.S. (1999) Ecological genetics of seed germination regulation in Bromus tectorum L. I. Phenotypic variance among and within populations. Oecologia 120, 27–34.CrossRefGoogle Scholar
Meyer, S.E., Kitchen, S.G. and Carlson, S.L. (1995) Seed germination timing patterns in intermountain Penstemon (Scrophulariaceae). American Journal of Botany 82, 377–389.CrossRefGoogle Scholar
Milberg, P. and Andersson, L. (1998) Does cold stratification level out differences in seed germinability between populations? Plant Ecology 134, 225–234.CrossRefGoogle Scholar
Panetta, F.D. and Randall, R.P. (1993) Variation between Emex australis populations in seed dormancy/non-dormancy cycles. Australian Journal of Ecology 18, 275–280.CrossRefGoogle Scholar
Pons, T.L. (2000) Seed responses to light. pp. 237–260. in Fenner, M. (Ed.) Seeds – the ecology of regeneration in plant communities (2nd edition). Wallingford, CABI Publishing.CrossRefGoogle Scholar
Qaderi, M.M. and Cavers, P.B. (2002) Interpopulation and interyear variation in germination in Scotch thistle, Onopordum acanthium L., grown in a common garden: Genetics vs. environment. Plant Ecology 162, 1–8.CrossRefGoogle Scholar
Schmitt, J., Niles, J. and Wulff, R.D. (1992) Norms of reaction of seed traits to maternal environments in Plantago lanceolata. American Naturalist 139, 451–466.CrossRefGoogle Scholar
Schrautzer, J., Härdtle, W., Hemprich, G. and Wiebe, C. (1991) Zur Synökologie und Synsystematik gestörter Erlenwälder im Gebiet der Bornhöveder Seenkette (Schleswig-Holstein). Tuexenia 11, 293–307.Google Scholar
Schütz, W. (1997a) Are germination strategies important for the ability of cespitose wetland sedges (Carex) to grow in forests? Canadian Journal of Botany 75, 1692–1699.CrossRefGoogle Scholar
Schütz, W. (1997b) Primary dormancy and annual dormancy cycles in seeds of six temperate wetland sedges. Aquatic Botany 59, 75–85.CrossRefGoogle Scholar
Schütz, W. (1999) Germination responses of temperate Carex -species to diurnally fluctuating temperatures – a comparative study. Flora 194, 21–32.CrossRefGoogle Scholar
Schütz, W. and Milberg, P. (1997) Seed dormancy in Carex canescens – regional differences and ecological consequences. Oikos 78, 420–428.CrossRefGoogle Scholar
Schütz, W. and Rave, G. (1999) The effect of cold stratification and light on the seed germination of temperate sedges (Carex) from various habitats and implications for regenerative strategies. Plant Ecology 144, 215–230.CrossRefGoogle Scholar
Young, J.A., Palmquist, D.E. and Evans, R.A. (1991) Temperature profiles for germination of big sagebrush seeds from native stands. Journal of Range Management 44, 385–390.CrossRefGoogle Scholar