NDLI: Phytophthora cinnamomi visible necrotic lesion-colonisation relationships in native flora

Content Provider	Springer Nature Link
Author	Shearer, B. L. Crane, C. E.
Copyright Year	2012
Abstract	Relationships were examined between visible necrotic lesion and colonisation following stem wound inoculated of native plant species of the South-West Botanical Province of Western Australia with Phytophthora cinnamomi. Relationships were determined over a wide range of biotic and abiotic environments of plant taxa, host susceptibility, isolate, phosphite fungicide spray, native community and glasshouse environments, seasons and soil types. Consistent significant relationships were found between necrotic lesions and colonisation over the different environments. Visible necrotic lesions were either in-phase with or greater than colonisation in 55 % of the environments analysed. ANCOVA interactions of total visible necrotic lesion with treatments were not significant for 10 out of 14 interactions, indicating homogeneity of slopes in the majority of cases. Rather than having distinct hemibiotrophic stages, P. cinnamomi switches between necrotic lesions and colonisation of symptomless tissue depending on environmental conditions. Average necrotic lesion/taxa in stems following wound inoculation was significantly positively correlated with mortality following soil inoculation. Determination of visible necrotic lesion was 10 times quicker and 30 times cheaper than colonisation, giving considerable savings for large experiments. Quantification of necrotic lesion-colonisation relationships aids determination of mechanisms of pathogen invasion and host resistance.
Starting Page	633
Ending Page	644
Page Count	12
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	41
Issue Number	6
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-07-20
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phytophthora cinnamomi Visible necrotic lesion Colonisation Integrated adaptive disease management Host susceptibilities Symptomless Asymptomatic Environments Phosphite fungicide treatments Hemibiotroph Biotroph Necrotroph South-West Botanical Province of Western Australia Agriculture Plant Sciences Ecology Plant Pathology Entomology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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