NDLI: Phytophthora cinnamomi disease expression and habitat suitability of soils on a topographic gradient across a coastal plain from dunes to forested peneplain

Content Provider	Springer Nature Link
Author	Shearer, B. L. Crane, C. E.
Copyright Year	2013
Abstract	Ex-situ comparison of Phytophthora cinnamomi habitat suitability of soils from a topographic gradient across the Swan Coastal Plain from dunes to a forested peneplain provides clues to the influences of soil type on disease development. Only ex-situ testing was possible to compare P. cinnamomi habitat suitability because of confinement of Swan Coastal Plain plant communities to a relatively few, small remnants. Disease expression was determined in a shadehouse environment and stimulation of sporangium production in a controlled environment. Greater than 90 % mortality of Banksia grandis following P. cinnamomi ex-situ soil inoculation and greatest stimulation of sporangium formation and release of zoospores by soil extracts from Bassendean Dune, Pinjarra Plain, Ridge Hill Shelf and Jarrah Forest reflected high disease incidence and severity that occurs in these landscape elements. In Quindalup Dune (QD) soil there were no deaths of B. grandis following P. cinnamomi soil inoculation, consistent with the lack of disease incidence and expression that occurs in QD plant communities. However QD soils stimulated sporulation similar to the other landscape element soil extracts. Higher levels of phosphorus and calcium in QD soils possibly influenced the host-infection process after sporangium formation and zoospore release. Greater than 90 % plant mortality following P. cinnamomi soil inoculation and stimulation of sporulation by Spearwood Dune (SD) soil extracts did not reflect low disease incidence and severity that occurs in this landscape element. Differences in measured variables between soils did not indicate reasons for the high plant mortality following ex-situ soil inoculation and low disease expression in SD plant communities, possibly due to post sporulation effects of the soil environments on host infection and invasion by P. cinnamomi.
Starting Page	131
Ending Page	142
Page Count	12
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	43
Issue Number	2
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-10-27
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phytophthora cinnamomi Landscape ecology Soils Topographic gradient Botanical epidemiology Autecology Patch dynamics Geomorphic template Logistic model Sporangia Stimulation Seasonality Integrated adaptive management Phosphorus Calcium Plant Pathology Plant Sciences Agriculture Entomology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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