Penetration and symptom development of Pleiochaeta root rot in susceptible and resistant Lupinus albus cultivars

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Abstract

Pleiochaeta root rot caused by Pleiochaeta setosa is a major threat to the Australian lupin industry. Although Pleiochaeta root rot-resistant Lupinus albus varieties have been bred, there is no information on the likely mechanism of this resistance. Susceptible (Kiev mutant) and resistant (P25758) albus lupin cultivars were inoculated with spores of P. setosa strain PS6-1 and the infection process studied microscopically. No specialised penetration structures were observed on the roots, and infecting hyphae entered roots of both cultivars by growing directly between root surface cells. Lengths of conidial germ tubes on resistant hosts was significantly longer than on susceptible hosts, suggesting that a component of the resistance is via reduced host recognition by the pathogen.
Original languageEnglish
Pages (from-to)387-391
Number of pages5
JournalAustralian Plant Pathology Society Newsletter
Volume37
Issue number4
DOIs
Publication statusPublished - 2008

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Pleiochaeta
Lupinus albus
Pleiochaeta setosa
root rot
signs and symptoms (plants)
Lupinus
cultivars
germ tube
resistance mechanisms
hyphae
spores
industry
breeds
mutants
pathogens
infection
cells

Cite this

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title = "Penetration and symptom development of Pleiochaeta root rot in susceptible and resistant Lupinus albus cultivars",
abstract = "Pleiochaeta root rot caused by Pleiochaeta setosa is a major threat to the Australian lupin industry. Although Pleiochaeta root rot-resistant Lupinus albus varieties have been bred, there is no information on the likely mechanism of this resistance. Susceptible (Kiev mutant) and resistant (P25758) albus lupin cultivars were inoculated with spores of P. setosa strain PS6-1 and the infection process studied microscopically. No specialised penetration structures were observed on the roots, and infecting hyphae entered roots of both cultivars by growing directly between root surface cells. Lengths of conidial germ tubes on resistant hosts was significantly longer than on susceptible hosts, suggesting that a component of the resistance is via reduced host recognition by the pathogen.",
keywords = "Lupins, Pleiochaeta root rot",
author = "Nicola Wunderlich and Gavin Ash and John Harper and Raymond Cowley and David Luckett",
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T1 - Penetration and symptom development of Pleiochaeta root rot in susceptible and resistant Lupinus albus cultivars

AU - Wunderlich, Nicola

AU - Ash, Gavin

AU - Harper, John

AU - Cowley, Raymond

AU - Luckett, David

N1 - Imported on 12 Apr 2017 - DigiTool details were: Journal title (773t) = Australasian Plant Pathology. ISSNs: 0815-3191;

PY - 2008

Y1 - 2008

N2 - Pleiochaeta root rot caused by Pleiochaeta setosa is a major threat to the Australian lupin industry. Although Pleiochaeta root rot-resistant Lupinus albus varieties have been bred, there is no information on the likely mechanism of this resistance. Susceptible (Kiev mutant) and resistant (P25758) albus lupin cultivars were inoculated with spores of P. setosa strain PS6-1 and the infection process studied microscopically. No specialised penetration structures were observed on the roots, and infecting hyphae entered roots of both cultivars by growing directly between root surface cells. Lengths of conidial germ tubes on resistant hosts was significantly longer than on susceptible hosts, suggesting that a component of the resistance is via reduced host recognition by the pathogen.

AB - Pleiochaeta root rot caused by Pleiochaeta setosa is a major threat to the Australian lupin industry. Although Pleiochaeta root rot-resistant Lupinus albus varieties have been bred, there is no information on the likely mechanism of this resistance. Susceptible (Kiev mutant) and resistant (P25758) albus lupin cultivars were inoculated with spores of P. setosa strain PS6-1 and the infection process studied microscopically. No specialised penetration structures were observed on the roots, and infecting hyphae entered roots of both cultivars by growing directly between root surface cells. Lengths of conidial germ tubes on resistant hosts was significantly longer than on susceptible hosts, suggesting that a component of the resistance is via reduced host recognition by the pathogen.

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KW - Pleiochaeta root rot

U2 - 10.1071/AP08014

DO - 10.1071/AP08014

M3 - Article

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JF - Australasian Plant Pathology

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