Australasian Plant Pathology (2013) 42, 351-361

B.L. Shearer, C.E. Crane and J.A. Cochrane (2013)
Variation in susceptibility of Banksia (including Dryandra) to Phytophthora cinnamomi
Australasian Plant Pathology 42 (3), 351-361
Abstract: Variation in susceptibility of 109 Western Australian Banksia and Dryandra and 16 Eastern Australian Banksia to Phytophthora cinnamomi infection was evaluated after soil inoculation. Banksia and Dryandra were initially analysed separately and then combined due to the transfer of Dryandra to Banksia. Disease progress curves of % mortality following soil inoculation were analysed with the three logistic model parameters of upper asymptote (K_max), lag time (t_½K) and intrinsic rate of increase (r). The susceptibility continuum represented by the ordination of parameters of the logistic model for % plant mortality in two dimensions was similar for Banksia, Dryandra and combined Banksia and Dryandra. Although resistant taxa had low K_max, the values for delay and rate varied. In comparison, susceptible taxa tended to have high K_max short delay and fast rate. Western Australian threatened and priority Banksia were significantly more susceptible than common Banksia. Seeders were more susceptible than resprouters. There was no significant difference in Western Australian Banksia susceptibility between soil, rainfall region, bioregion and growth form. Of the Western Australian Banksia tested, 40 % were most at risk of P. cinnamomi infection because they were either threatened, priority or common though geographically restricted taxa with K_max of mortality >50 %. Positioning Banksia taxa on the P. cinnamomi resistance-susceptibility continuum needs to be incorporated into extinction-risk methodology in order to prioritise flora for conservation actions according to hazard from the pathogen.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Bryan L. Shearer, Colin Crane

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phytophthora cinnamomi	Banksia (crop)	Australia (South+SE)
	Phytophthora cinnamomi	Banksia (crop)	Australia (Western)