Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-21T23:47:11.516Z Has data issue: false hasContentIssue false
  • English
  • Français

Dose–response of germinating Rudbeckia mollis (Asteraceae) seeds exposed to various thermal scenarios

Published online by Cambridge University Press:  08 June 2012

Keith Kettner  and
Hector Eduardo Pérez
Keith Kettner
Affiliation:
Department of Horticultural Sciences, Undergraduate Program, University of Florida, PO Box 110690, Gainesville, FL, 32611-0690, USA
Hector Eduardo Pérez*
Affiliation:
Department of Environmental Horticulture, Plant Conservation and Restoration Horticulture Research Consortium, University of Florida, PO Box 110675, Gainesville, FL, 32611-0675, USA
*
*Correspondence Email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Temperature is a key environmental signal regulating germination. A thorough understanding of how seed populations respond to various temperatures can inform end-users regarding effective establishment strategies and forms the basis for questions related to a taxon's thermo-biology. Although abundant information exists regarding germination responses of economically important crops to several temperature scenarios, much less is known concerning the seed biology of wild germplasm. To address this, we examined the germination response of non-dormant Rudbeckia mollis seeds to various doses of constant or simulated seasonal diel temperatures. Germination response was sigmoidal. Seeds of R. mollis were capable of germinating within a few days to high percentages (>95%) at relatively cool constant (15–25°C) or 12-hour alternating (22/11–33/24°C) temperatures, with optimum temperatures for germination occurring at 25°C or 29/19°C. Germination was inhibited as temperatures increased to 30°C or 33/24°C with early and late germinating phenotypes displaying differential responses at these temperatures. No germination occurred at 35°C. Results are discussed in terms of seedling establishment of R. mollis outside its natural range and implications of climate change on germination.

Keywords

germination rateheat stressoptimum temperaturephenotypeRudbeckia mollist 50thermo-inhibition
Type
Research Papers
Information
Seed Science Research , Volume 22 , Issue 3 , September 2012 , pp. 191 - 197
Copyright
Copyright © Cambridge University Press 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alvarado, V. and Bradford, K.J. (2002) A hydrothermal time model explains the cardinal temperatures for seed germination. Plant, Cell and Environment 25, 1061–1069.CrossRefGoogle Scholar
Argyris, J., Dahal, P., Hayashi, E., Still, D.W. and Bradford, K.J. (2008) Genetic variation for lettuce seed thermoinhibition is associated with temperature-sensitive expression of abscisic acid, gibberellin, and ethylene biosynthesis, metabolism, and response genes. Plant Physiology 148, 926–947.CrossRefGoogle ScholarPubMed
Baskin, C.C. and Baskin, J.M. (2001) Seeds: Ecology, biogeography, and evolution of dormancy and germination. San Diego, California, Academic Press.Google Scholar
Baskin, C.C. and Baskin, J.M. (2004) Germinating seeds of wildflowers, an ecological perspective. HortTechnology 14, 467–473.CrossRefGoogle Scholar
Baskin, J.M. and Baskin, C.C. (2004) A classification system for seed dormancy. Seed Science Research 14, 1–16.CrossRefGoogle Scholar
Baskin, C.C., Baskin, J.M. and Yoshinaga, A. (2007) Imbibition and germination of seeds of Colubrina oppositifolia (Rhamnaceae), a federal-endangered tree species endemic to Hawaii. Natural Areas Journal 27, 25–30.CrossRefGoogle Scholar
Bazin, J., Batlla, D., Dussert, S., El-Maarouf-Bouteau, H. and Bailly, C. (2011) Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening. Journal of Experimental Botany 62, 627–640.CrossRefGoogle ScholarPubMed
Corbineau, F., Gay-Mathieu, C., Vinel, D. and Côme, D. (2002) Decrease in sunflower (Helianthus annuus) seed viability caused by high temperature as related to energy metabolism, membrane damage and lipid composition. Physiologia Plantarum 116, 489–496.CrossRefGoogle Scholar
Covell, S., Ellis, R.H., Roberts, E.H. and Summerfield, R.J. (1986) The influence of temperature on seed germination rate in grain legumes. I. A comparison of chickpea, lentil, soyabean and cowpea at constant temperatures. Journal of Experimental Botany 37, 705–715.CrossRefGoogle Scholar
Donohue, K. (2002) Germination timing influences natural selection on life-history characters in Arabidopsis thaliana . Ecology 83, 1006–1016.CrossRefGoogle Scholar
Donohue, K., Dorn, L., Griffith, C., Kim, E., Aguilera, A., Polisetty, C.R. and Schmitt, J. (2005) The evolutionary ecology of seed germination of Arabidopsis thaliana: variable natural selection on germination timing. Evolution 59, 758–770.Google ScholarPubMed
Fenner, M. and Thompson, K. (2005) The ecology of seeds. Cambridge, UK, Cambridge University Press.CrossRefGoogle Scholar
Garcia-Huidobro, J., Monteith, J.L. and Squire, G.R. (1982) Time, temperature and germination of pearl millet (Pennisetum typhoides S. & H.): I. Constant temperature. Journal of Experimental Botany 33, 288–296.CrossRefGoogle Scholar
Hendricks, S.B. and Taylorson, R.B. (1979) Dependence of thermal response of seeds on membrane transitions. Proceedings of the National Academy of Sciences, USA 76, 778–781.CrossRefGoogle ScholarPubMed
Herz, W. and Kumar, N. (1981) Antileukemic C-15 functionalized ambrosanolides from Rudbeckia mollis . Journal of Organic Chemistry 46, 1356–1361.CrossRefGoogle Scholar
Hong, T.D., Linington, S. and Ellis, R.H. (1998) Compendium of information on seed storage behaviour. Kew, UK, Kew Publishing.Google Scholar
IPCC (2007) Climate change 2007: The physical science basis. pp. 847–940 in Solomon, S.; Qin, D.; Manning, M.; Chen, Z.; Marquis, M.; Averyt, K.B.; Tignor, M.; Miller, H.L. (Eds) Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007. Cambridge, UK, Cambridge University Press.Google Scholar
Kauth, P.J. and Pérez, H.E. (2011) Industry survey of the native wildflower market in Florida. HortTechnology 21, 779–788.CrossRefGoogle Scholar
Lesica, P. and Allendorf, F.W. (1999) Ecological genetics and the restoration of plant communities: mix or match? Restoration Ecology 7, 42–50.CrossRefGoogle Scholar
Menges, E.S. (2008) Restoration demography and genetics of plants: When is translocation successful? Australian Journal of Botany 56, 187–196.CrossRefGoogle Scholar
Mijnsbrugge, K.V., Bischoff, A. and Smith, B. (2010) A question of origin: Where and how to collect seed for ecological restoration. Basic and Applied Ecology 11, 300–311.CrossRefGoogle Scholar
Milstein, G.P. (2005) The uses and potential of wildflower seed in landscaping. pp. 39–51 in McDonald, M.B.; Kwong, F.Y. (Eds) Flower seeds biology and technology. Wallingford, UK, CABI International.CrossRefGoogle Scholar
Orozco-Segovia, A., González-Zertuche, L., Mendoza, A. and Orozco, S. (1996) A mathematical model that uses Gaussian distribution to analyze the germination of Manfreda brachystachya (Agavaceae) in a thermogradient. Physiologia Plantarum 98, 431–438.CrossRefGoogle Scholar
Peel, M.C., Finlayson, B.L. and McMahon, T.A. (2007) Updated world map of the Köppen–Geiger climate classification. Hydrology and Earth System Sciences 11, 1633–1644.CrossRefGoogle Scholar
Peters, J., (Ed.) (2000) Tetrazolium testing handbook: Contribution No. 29 to the Handbook on Seed Testing. Springfield, Illinois, Association of Official Seed Analysts.Google Scholar
Priestly, D.A. (1986) Seed aging: Implications for seed storage and persistance in the soil. Ithaca, New York, Comstock Publishing.Google Scholar
Probert, R.J. (2000) The role of temperature in the regulation of seed dormancy and germination. pp. 261–292 in Fenner, M. (Ed.) The ecology of regeneration in plant communities. Wallingford, UK, CABI Publishing.CrossRefGoogle Scholar
Roberts, E.H. (1973) Predicting the storage life of seeds. Seed Science and Technology 1, 499–514.Google Scholar
Taylor, N.J., Hills, P.N., Gold, J.D., Stirk, W.A. and van Staden, J. (2005) Factors contributing to the regulation of thermoinhibition in Tagetes minuataL. Journal of Plant Physiology 162, 1270–1279.CrossRefGoogle Scholar
Walck, J.L., Hidayati, S.N., Dixon, K.W., Thompson, K. and Poschlod, P. (2011) Climate change and plant regeneration from seed. Global Change Biology 17, 2145–2161.CrossRefGoogle Scholar
Walters, C. (1998) Understanding the mechanisms and kinetics of seed aging. Seed Science Research 8, 223–244.CrossRefGoogle Scholar
Washitani, I. and Takenaka, A. (1986) ‘Safe sites’ for the seed germination of Rhus javanica: a characterization by responses to temperature and light. Ecological Research 1, 71–82.CrossRefGoogle Scholar
Watt, M.S., Bloomberg, M. and Finch-Savage, W.E. (2011) Development of a hydrothermal time model that accurately characterises how thermoinhibition regulates seed germination. Plant, Cell and Environment 34, 870–876.CrossRefGoogle ScholarPubMed
Wunderlin, R.P. and Hansen, B.F. (2004) Atlas of Florida vascular plants. Tampa, Florida, Institute for Systematic Botany, University of South Florida.Google Scholar