Combinational dormancy in seeds of the Western Australian endemic species Diplopeltis huegelii (Sapindaceae)

Turner, S. R., Merritt, D. J., Baskin, J. M., Baskin, C, C. and Dixon, K. W. (2006) Combinational dormancy in seeds of the Western Australian endemic species Diplopeltis huegelii (Sapindaceae). Australian Journal of Botany, 54 6: 565-570. doi:10.1071/BT05156


Author Turner, S. R.
Merritt, D. J.
Baskin, J. M.
Baskin, C, C.
Dixon, K. W.
Title Combinational dormancy in seeds of the Western Australian endemic species Diplopeltis huegelii (Sapindaceae)
Formatted title
Combinational dormancy in seeds of the Western Australian endemic species Diplopeltis huegelii (Sapindaceae)
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 0067-1924
1444-9862
Publication date 2006
Sub-type Article (original research)
DOI 10.1071/BT05156
Volume 54
Issue 6
Start page 565
End page 570
Total pages 6
Place of publication Collingwood, VIC, Australia
Publisher CSIRO Publishing
Language eng
Subject 050202 Conservation and Biodiversity
Formatted abstract
Seeds of the endemic Western Australian species Diplopeltis huegelii Endl. were successfully germinated after the presence of combinational dormancy was identified, following the observation of selected seed characteristics. D. huegelii seeds were found to have large, fully developed, peripheral coiled embryos (with no endosperm) that are 7–8 mm long when uncoiled. Seed-coat dormancy was overcome by dipping seeds in hot water for ≥15 s, but seeds also required a period of after-ripening before they would germinate readily. After-ripening occurred while intact seeds were stored dry at ambient laboratory conditions for 13 months or when scarified (hot-water treated) seeds were stored at 13, 23 or 50% RH at 23°C for 6 weeks. Scarified 13-month-old seeds germinated readily at 7/18, 13/26 and 18/33°C in a 12-h photoperiod and in constant darkness, whereas scarified 1-month-old seeds germinated to ≤43%. Thus, seed dormancy in this species is caused by a water-impermeable seed coat (physical dormancy, PY) and a (non-deep) physiologically dormant embryo (PD), i.e. combinational dormancy (PY + PD). This is only the second report of combinational dormancy in seeds of Sapindaceae and the first report in this family of the PD component of (PY + PD) being broken during dry storage.
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, 20 May 2009, 15:15:04 EST by Ms Lynette Adams on behalf of School of Pharmacy