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Improved germination of the Australian natives: Hibbertia commutata, Hibbertia amplexicaulis (Dilleniaceace), Chameeascilla corymboasa (Liliaceae) and Leucopogon nutans (Epacridaceae)

Allan, Sally M., Adkins, Steve W., Preston, Christine A. and Bellairs, Sean M. (2004). Improved germination of the Australian natives: Hibbertia commutata, Hibbertia amplexicaulis (Dilleniaceace), Chameeascilla corymboasa (Liliaceae) and Leucopogon nutans (Epacridaceae). Australian Journal of Botany,52(3):345-351.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 10 times in Scopus Article | Citations

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Title Improved germination of the Australian natives: Hibbertia commutata, Hibbertia amplexicaulis (Dilleniaceace), Chameeascilla corymboasa (Liliaceae) and Leucopogon nutans (Epacridaceae)
Author Allan, Sally M.
Adkins, Steve W.
Preston, Christine A.
Bellairs, Sean M.
Journal Name Australian Journal of Botany
Publication Date 2004
Volume Number 52
Issue Number 3
ISSN 0067-1924   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-3342901165
Start Page 345
End Page 351
Total Pages 7
Place of Publication Canberra, ACT, Australia
Publisher CSIRO Publishing
Field of Research 0607 - Plant Biology
HERDC Category C1 - Journal Article (DEST)
Abstract Hibbertia commutata Steudel, H. amplexicaulis Steudel, Chamaescilla corymbosa (R.Br.) F.Muell. Ex Benth. and Leucopogon nutans E.Pritzel are four Australian species that are difficult to germinate during mine-site rehabilitation. Laboratory germination trails were conducted to identify dormancy mechanisms and to improve germination response. Treatments applied to all species included scarification and scarification followed by soaking seeds in smoke water (1, 5 or 10%) or gibberellic acid solution (50, 200 or 1000 μM). Additional treatments with kinetin solution (50, 200 or 1000 μM) and smoke water (50 or 100%) were applied to scarified or unscarified seeds of C. corymbosa. Thermal-shock treatment was applied to L. nutans fruit, some of which were subsequently scarified and subjected to both smoke water (10%) and gibberellic-acid solution (1000 μM). Significant germination increases were obtained by using dormancy-breaking treatments on H. commutata (12.8 to 76.0%), H. amplexicaulis (6.8 to 55.1%) and C. corymbosa (48.5 to 86.4%). Scarification alone increased germination of both Hibbertia species, suggesting that these species display a physical seed coat-imposed dormancy mechanism. Germination of H. amplexicaulis was further increased by the application of gibberellic-acid solution, indicating a possible embryo-imposed dormancy mechanism. Scarification followed by the application of smoke water produced the highest germination response for C. corymbosa seeds. Scarification alone did not significantly increase germination, inferring the existence of a smoke-responsive embryo dormancy mechanism. Seeds of L. nutans, although viable, failed to germinate and are thought to display complex seed coat- and embryo-imposed dormancy mechanisms.
DOI http://dx.doi.org/10.1071/BT03097   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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