Variation in seed longevity among different populations, species and genera found in collections from wild Australian plants

Kochanek, J., Steadman, K., Probert, R.J. and Adkins, S.W. (2009) Variation in seed longevity among different populations, species and genera found in collections from wild Australian plants. AUSTRALIAN JOURNAL OF BOTANY, 57 2: 123-131. doi:10.1071/BT09023


Author Kochanek, J.
Steadman, K.
Probert, R.J.
Adkins, S.W.
Title Variation in seed longevity among different populations, species and genera found in collections from wild Australian plants
Journal name AUSTRALIAN JOURNAL OF BOTANY   Check publisher's open access policy
ISSN 0067-1924
Publication date 2009
Year available 2009
Sub-type Article (original research)
DOI 10.1071/BT09023
Volume 57
Issue 2
Start page 123
End page 131
Total pages 9
Editor Hill, B
Ferrer, S
Place of publication Australia
Publisher CSIRO Publishing
Collection year 2010
Language eng
Subject C1
060203 Ecological Physiology
960805 Flora, Fauna and Biodiversity at Regional or Larger Scales
Abstract Natural variation in longevity among populations of the same species, and between species and genera was investigated to inform seed-collection strategies. Seed longevity for 30 wild Australian populations was measured with a controlled ageing test. The populations were represented by eight species from three genera, namely Minuria (Asteraceae), Wahlenbergia (Campanulaceae) and Plantago (Plantaginaceae), each collected from up to eight different locations. Seedsurvival curves were fitted by using the equation v =Ki + p/s, which allowed comparison of the initial population viability (Ki), the population distribution of seed life spans (s), and mean seed longevity (P50, calculated as Kis). At a genus level, the average P50 indicated that M. integerrima (DC) Benth. is the longest-lived, Wahlenbergia is intermediate and Plantago is the shortest-lived. However, there was also variation in P50 values among populations of most species. Some species had the same s value for all populations, e.g. all eight populations of W. communis Carolin had the same s value, with the differences in Ki causing the variation in P50. This consistency in s existed even though seedlots were collected from diverse locations, with mean annual rainfall ranging from 180 to 840 mm. In comparison, for the six seedlots of W. gracilis (G.Forst.) A.DC., a large difference in s as well asKi led to the variability in P50, with some indication of a possible correlation between annual rainfall and P50 or s in some species. A relationship between variation in s and the breeding system is proposed for Wahlenbergia. The data show that it can be risky to expect accurate prediction of seed longevity for a wild species on the basis of survival data from a single collection.
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Agriculture and Food Sciences
 
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Created: Thu, 03 Sep 2009, 08:10:47 EST by Mr Andrew Martlew on behalf of School of Land, Crop and Food Sciences