In planta selfing and oospore production of Phytophthora cinnamomi in the presence of Acacia pulchella

A.U. Jayasekera; J.A. McComb; B.L. Shearer; G.E.St.J. Hardy

doi:10.1016/j.mycres.2006.11.003

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In planta selfing and oospore production of Phytophthora cinnamomi in the presence of Acacia pulchella

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In planta selfing and oospore production of Phytophthora cinnamomi in the presence of Acacia pulchella

A.U. Jayasekera, J.A. McComb, B.L. Shearer and G.E.St.J. Hardy

Mycological Research, Vol.111(3), pp.355-362

2007

DOI: https://doi.org/10.1016/j.mycres.2006.11.003

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Abstract

This paper provides the first evidence of A2 type 1 and type 2 isolates of Phytophthora cinnamomi producing selfed oospores in planta in an Australian soil and in a potting mix. Oospores were observed in infected lupin (Lupinus angustifolius) roots incubated for 7 d either in the substrate under potted Acacia pulchella plants, or in soils collected from under and near varieties of A. pulchella in jarrah (Eucalyptus marginata) forest. The A2 type isolates varied in their ability to produce selfed oospores and none were produced by A1 isolates. The gametangial association was amphigynous and spores were predominantly spherical with diameters from 13–40 μm. The oospores were viable but dormant. Two A2 type isolates produced small numbers of selfed oospores with amphigynous antheridia axenically in Ribeiro's liquid medium within 30 d, and one A2 type 2 isolate produced oospores after mating with an A1 strain. Evidence is presented that the presence of roots of Acacia pulchella, and particularly A. pulchella var. glaberrima and var. goadbyi, enhances the production of oospores.

Details

Title: In planta selfing and oospore production of Phytophthora cinnamomi in the presence of Acacia pulchella
Authors/Creators: A.U. Jayasekera (Author/Creator) - Murdoch University
J.A. McComb (Author/Creator) - Murdoch University
B.L. Shearer (Author/Creator) - Murdoch University
G.E.St.J. Hardy (Author/Creator) - Murdoch University
Publication Details: Mycological Research, Vol.111(3), pp.355-362
Publisher: Elsevier
Identifiers: 991005541842507891
Copyright: (C) Elsevier
Murdoch Affiliation: School of Biological Sciences and Biotechnology; Centre for Phytophthora Science and Management
Language: English
Resource Type: Journal article

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Citation topics: 3 Agriculture, Environment & Ecology; 3.97 Plant Pathology; 3.97.1439 Phytophthora Management
Web Of Science research areas: Mycology
ESI research areas: Plant & Animal Science