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Inter-species comparison of seed dormancy and germination of six annual Asteraceae weeds in an ecological context

Published online by Cambridge University Press:  01 March 2008

Laila M. Karlsson ,
T. Tamado  and
Per Milberg
Laila M. Karlsson
Affiliation:
IFM Division of Ecology, Linköping University, SE-581 83 Linköping, Sweden
T. Tamado
Affiliation:
Department of Plant Science, Haramaya University, Dire Dawa, and Woalita Sodo University, PO Box 138, Ethiopia
Per Milberg*
Affiliation:
IFM Division of Ecology, Linköping University, SE-581 83 Linköping, Sweden
*
*Correspondence Fax: +46 13 28 13 99 Email: permi@ifm.liu.se
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Abstract

To understand germination timing in an ecological context, the response to environmental events that affect seed dormancy is central, and has to be combined with knowledge of germination responses to different circumstances. In this study, seed dormancy, germination and emergence phenology of six annual co-occurring weedy Asteraceae species were investigated. Three pre-treatments (warm and cold stratification, and dry storage) were tested as possible dormancy-affecting environmental events. Seeds were also sown outdoors. Species-specific differences were revealed in analyses. To facilitate general descriptions of dormancy patterns and germination preferences separately, condensed responses to the different possible dormancy-affecting treatments and relative germination in different environments were plotted, giving species-specific patterns. Most species exhibited decreased dormancy to two or three pre-treatments. Dormancy was most effectively reduced by cold stratification for three species (Guizotia scabra, Parthenium hysterophorus, Verbesina encelioides), by warm stratification for two (Bidens pilosa, Galinsoga parviflora) and by dry storage for one (Tagetes minuta). All species germinated more when provided with light than in continuous darkness. Temperature levels most suitable for germination varied from low (15/5–20/10°C) for V. encelioides to high (25/15–30/20°C) for B. pilosa. It is concluded that, even though the species have different dormancy patterns and germination preferences that suggest different possible distribution ranges, they achieve similar emergence timing in the field in environments with a pronounced dry period after dispersal and small annual temperature fluctuations.

Keywords

Bidens pilosaGalinsoga parvifloraGuizotia scabra ssp. schimperiParthenium hysterophorusTagetes minutatropical weedsVerbesina encelioides
Type
Research Article
Information
Seed Science Research , Volume 18 , Issue 1 , March 2008 , pp. 35 - 45
Copyright
Copyright © Cambridge University Press 2008

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References

Baagøe, J. (1974) The genus Guizotia (Compositae) – a taxonomic revision. Botanisk Tidsskrift 69, 1–39.Google Scholar
Baskin, J.M. and Baskin, C.C. (2004) A classification system for seed dormancy. Seed Science Research 14, 1–16.CrossRefGoogle Scholar
Bischoff, A., Vonlanthen, B., Steinger, T. and Müller-Schärer, H. (2006) Seed provenance matters – effects on germination of four plant species used for ecological restoration. Basic and Applied Ecology 7, 347–359.CrossRefGoogle Scholar
Bromilow, C. (2001) Problem plants of South Africa. Pretoria, Briza Publications.Google Scholar
Copete, M.A., Herranz, J.M. and Ferrandis, P. (2005) Seed dormancy and germination in threatened Iberian Coincya (Brassicaceae) taxa. Ecoscience 12, 257–266.CrossRefGoogle Scholar
Firehun, Y. and Tamado, T. (2006) Weed flora in the Rift Valley sugarcane plantations of Ethiopia as influenced by soil types and agronomic practices. Weed Biology and Management 6, 139–150.CrossRefGoogle Scholar
Harper, J.L. (1957) The ecological significance of dormancy and its importance in weed control. Proceedings of the 4th International Congress of Crop Protection 1, 415–420.Google Scholar
Harper, J.L. (1977) Population biology of plants. London, Academic Press.Google Scholar
Holm, L., Pancho, J.V., Herberger, J.P. and Plucknett, D.L. (1979) A geographical atlas of world weeds. New York, Wiley.Google Scholar
Holm, L., Doll, J., Holm, E., Pancho, J. and Herberger, J. (1997) World weeds: natural histories and distribution. New York, Wiley.Google Scholar
Karlsson, L.M. and Milberg, P. (2007a) A comparative study of germination ecology of four Papaver taxa. Annals of Botany 99, 935–946.CrossRefGoogle ScholarPubMed
Karlsson, L.M. and Milberg, P. (2007b) Seed dormancy pattern and germination preferences of the South African annual Papaver aculeatum. South African Journal of Botany 73, 422–428.CrossRefGoogle Scholar
Karlsson, L.M. and Milberg, P. (2007c) Comparing after-ripening response and germination requirements of Conyza canadensis and C. bonariensis (Asteraceae) through logistic functions. Weed Research 47, 433–441.CrossRefGoogle Scholar
Karlsson, L.M. and Milberg, P. (2008) Variation within species and inter-species comparison of seed dormancy and germination of four annual Lamium species. Flora (in press).CrossRefGoogle Scholar
Keller, M. and Kollman, J. (1999) Effects of seed provenance on germination of herbs for agricultural compensation sites. Agriculture, Ecosystems and Environment 72, 87–99.CrossRefGoogle Scholar
Kettenring, K.M., Gardner, G. and Galatowitsch, S.M. (2006) Effect of light on seed germination of eight wetland Carex species. Annals of Botany 98, 869–874.CrossRefGoogle ScholarPubMed
Lang, G.A. (1987) Dormancy: a new universal terminology. HortScience 22, 817–820.CrossRefGoogle Scholar
Lid, J., Lid, D.T. and Elven, R. (2005) Norsk flora (7th edition) (in Norwegian). Oslo, Det Norske Samlaget.Google Scholar
Merritt, D.J., Turner, S.R., Clarke, S. and Dixon, K.W. (2007) Seed dormancy and germination stimulation syndromes for Australian temperate species. Australian Journal of Botany 55, 336–344.CrossRefGoogle Scholar
Parsons, W.T. and Cuthbertson, E.G. (2001) Noxious weeds of Australia (2nd edition). Collingwood, CSIRO Publishing.Google Scholar
Pezzani, F. and Montaña, C. (2006) Inter- and intraspecific variation in the germination response to light quality and scarification in grasses growing in two-phase mosaics of the Chihuahuan desert. Annals of Botany 97, 1063–1071.CrossRefGoogle ScholarPubMed
StatSoft Inc. (2004) STATISTICA (data analysis software system), version 7. Available at Web sitewww.statsoft.com.Google Scholar
Stroud, A. and Parker, C. (1989) A weed identification guide for Ethiopia. Rome, Food and Agriculture Organization of the United Nations.Google Scholar
Tamado, T. and Milberg, P. (2000) Weed flora in arable fields of eastern Ethiopia with emphasis on the occurrence of Parthenium hysterophorus. Weed Research 40, 507–521.CrossRefGoogle Scholar
Vleeshouwers, L.M., Bouwmeester, H.J. and Karssen, C.M. (1995) Redefining seed dormancy: an attempt to integrate physiology and ecology. Journal of Ecology 83, 1031–1037.CrossRefGoogle Scholar