Seed dormancy and germination stimulation syndromes for Australian temperate species

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 3: 336-344. doi:10.1071/BT06106


Author Merritt, D. J.
Turner, S. R.
Clarke, S.
Dixon, K. W.
Title Seed dormancy and germination stimulation syndromes for Australian temperate species
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 0067-1924
1444-9862
Publication date 2007-05
Sub-type Article (original research)
DOI 10.1071/BT06106
Volume 55
Issue 3
Start page 336
End page 344
Total pages 9
Place of publication Collingwood, VIC, Australia
Publisher CSIRO Publishing
Language eng
Subject 050202 Conservation and Biodiversity
Formatted abstract
Understanding seed germination biology and the dynamics of seed dormancy is essential to developing reliable germination techniques. This paper presents some new data and reviews recent findings from germination studies on Australian species, with respect to the role of temperature and moisture in the control of dormancy and germination. A seed-burial experiment was conducted over a 1-year period (January–December) with seeds of Acanthocarpus preissii Lehm., Astroloma xerophyllum (DC.) Sond., Gahnia grandis (Labill.) S.T.Blake, Goodenia scaevolina F.Muell. and Tersonia cyathiflora (Fenzl) J.W.Green to determine the fluctuations in temperature and moisture seeds naturally experience in the buried environment. All seeds became hydrated during autumn (March) while soil temperatures were >15°C, suggestive of a period of warm stratification before the onset of cooler winter temperatures appropriate for germination. Evidence of rapid wetting and drying of seeds in the soil environment was also present. Laboratory experiments testing stratification as a means for dormancy loss showed that several weeks of warm stratification at 26/13°C or 33/18°C promoted germination of Lomandra preissii (Endl.) Ewart, Marianthus bicolor (Putt.) F.Muell. and Xyris lanata R.Br. seeds. X. lanata seeds also responded to several weeks of cold stratification at 5°C. By integrating this new data with other published data on germination of Australian species, diagrammatic models of germination timing, dormancy syndromes and propagation strategies for temperate Australian species are presented as working hypotheses to help direct future research.
Keyword Experimental study
Germination
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Pharmacy Publications
 
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Created: Wed, 11 Feb 2009, 17:07:39 EST by Joanne Mellor on behalf of School of Pharmacy