@article {4001, title = {Assessment of Australian native annual/herbaceous perennial plant species as asymptomatic or symptomatic hosts of Phytophthora cinnamomi under controlled conditions}, journal = {Forest Pathology}, volume = {43}, year = {2013}, month = {06/2013}, pages = {245{\textendash}251}, abstract = {

Phytophthora cinnamomi is a necrotrophic pathogen of woody perennials and devastates many biomes worldwide. A controlled perlite{\textendash}hydroponic system with no other hyphae-producing organisms as contaminants present allowed rapid assessment of ten annual and herbaceous perennial plant species most of which have a wide distribution within the jarrah (Eucalyptus marginata) forest in Western Australia where this pathogen has been introduced. As some annuals and herbaceous perennials have recently been reported as symptomatic and asymptomatic hosts, laboratory screening of some of the field-tested annuals and herbaceous perennials and additional species was used to further evaluate their role in the pathogen{\textquoteright}s disease cycle. Nine of the species challenged with the pathogen were asymptomatic, with none developing root lesions; however, Trachymene pilosa died. The pathogen produced thick-walled chlamydospores and stromata in the asymptomatic roots. Furthermore, haustoria were observed in the roots, indicating that the pathogen was growing as a biotroph in these hosts.

}, doi = {10.1111/efp.12027}, url = {http://onlinelibrary.wiley.com/doi/10.1111/efp.12027/abstract}, author = {Crone, M. and McComb, J. A. and O{\textquoteright}Brien, P. A. and Hardy, G. E. St J.}, editor = {Andrea, V.} } @article {PPA:PPA12016, title = {Annual and herbaceous perennial native Australian plant species are symptomless hosts of Phytophthora cinnamomi in the Eucalyptus marginata (jarrah) forest of Western Australia}, journal = {Plant Pathology}, volume = {43}, year = {2012}, month = {11/2012}, pages = {245{\textendash}251}, abstract = {

Resistant annual and herbaceous perennial plant species were identified as key hosts which allow Phytophthora cinnamomi to persist on severely impacted black gravel sites within the Eucalyptus marginata (jarrah) forest of southwest Western Australia. Of the annual and herbaceous perennial plant species present on black gravel sites, 15 out of 19 species were found to be hosts of P.\ cinnamomi, and 10 of these were symptomless hosts. In particular, the native annual Trachymene pilosa and the two native herbaceous perennials Stylidium diuroides and Chamaescilla corymbosa were commonly found to be hosts of the pathogen. Species from 12 new genera including three from new families (Crassulaceae, Droseraceae and Primulaceae) are reported for the first time to be hosts of P.\ cinnamomi. The species from which P.\ cinnamomi was recovered were the native species: Chamaescilla corymbosa, Crassula closiana, Drosera erythrorhiza, Hydrocotyle callicarpa, Levenhookia pusilla, Paracaleana nigrita, Podotheca angustifolia, Pterochaeta paniculata, Rytidosperma caespitosum, Siloxerus multiflorus, Stylidium diuroides and Trachymene pilosa, and the introduced annual weeds Hypochaeris glabra, Lysimachia arvensis and Pentameris airoides.

}, keywords = {dieback, host species, jarrah forest, pathogen survival, Phytophthora cinnamomi, susceptibility rating}, issn = {1365-3059}, doi = {10.1111/ppa.12016}, url = {http://dx.doi.org/10.1111/ppa.12016}, author = {Crone, M. and McComb, J. A. and O{\textquoteright}Brien, P. A. and Hardy, G. E. St J.} }