Seed germination may explain differences in invasiveness and prevalence : a case study using cat's claw creeper (Dolichandra unguis-cati)
Buru, Joshua Comrade, Dhileepan, Kunjithapatham, Osunkoya, Olusegun O., & Scharaschkin, Tanya (2014) Seed germination may explain differences in invasiveness and prevalence : a case study using cat's claw creeper (Dolichandra unguis-cati). In Baker, Matthew (Ed.) 19th Australasian Weed Conference : "Science, Community and Food Security: the Weed Challenge", Tasmanian Weed Society, Hobart, Tasmania, Australia, pp. 223-226.
High germination rates and rapid germination behavior in response to different environmental cues are traits that may be associated with invasiveness. Cat’s claw creeper (Dolichandra unguis-cati (L.) Lohmann (syn. Macfadyena unguis-cati (L.) Gentry), a Weed of National Significance has two forms, a long-pod (LP) form and a short-pod (SP) from. The LP form occurs in only a few localities in southeast Queensland while the SP form is widely distributed in Queensland and New South Wales. The aims of this investigation were: to evaluate whether there are significant differences in germination traits between the two forms of cat’s claw creeper; and if there are any significant differences, to find out whether the differences in germination can be related to prevalence and invasiveness levels for the two forms. Long pod and short pod seeds collected in 2009, 2010, 2011, 2012 and 2013 from various localities in Qld were germinated in growth chambers in early 2013. The growth chambers were set to 10/20 ºC, 15/25 ºC and 20/30 ºC temperature cycles. Seeds from 2009-2012 of either form did not germinate, while for the fresh seeds (2013), SP exhibited significantly higher total germination percentage and rates than LP. Assuming that the two forms were introduced in Australia at around the same period, these results could explain why SP is widely distributed (and therefore more invasive) in Qld and NSW while LP is only confined to a few localities in southeast Qld.
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|Item Type:||Conference Paper|
|Keywords:||invasive, non-specific, germination rate, germination percentage, temperature, weeds, Dolichandra unguis-cati|
|Subjects:||Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ECOLOGY (060200)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > PLANT BIOLOGY (060700) > Plant Developmental and Reproductive Biology (060703)
|Divisions:||Current > Schools > School of Earth, Environmental & Biological Sciences
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2014 [please consult the author]|
|Deposited On:||23 Nov 2014 22:45|
|Last Modified:||25 Nov 2014 00:56|
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