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Katie ShieldsSupervisors Degree University Project Title Keywords Project Details Syzygium paniculatum is listed as vulnerable under both NSW and Federal legislation. It is found only along a narrow coastal strip from Lake Macquarie to Jervis Bay in four separate geographical areas. There is no current species recovery plan for S. paniculatum and there is no current understanding of population or reproductive biology of the species. Reproductive biology of this species is likely to be of high conservation significance because S. paniculatum has been found to be different to other native species of Syzygium in that its seeds are often polyembrionic. Some Asian species of Syzygium (S.malaccense, S.jambos & S.cumini) have polyembryonic seeds which consist of one zygotic embryo and embryos arising from nucellar material. It is possible that normally fertilised embryos are out-competed by embryos arising from proliferation of nucellar material. If this process is occurring in the rare species S. paniculatum it will have major implications for any future recovery plan due to the possibility of reduced genetic diversity within the species and increased genetic divergence between populations. Natural populations of Syzygium paniculatum need to be tested to determine genetic diversity, breeding strategy and fitness potential of offspring. Preliminary molecular work suggests polyploidy and has revealed a distinct lack of genetic diversity across all populations sampled, further increasing the importance of this study for the conservation of the species. Contact Details National Herbarium of New South Wales Phone |
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