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Germinate to exterminate: chemical stimulation of Spongospora subterranea resting spore germination and its potential to diminish soil inoculum

Citation

Balendres, MA and Clark, TJ and Tegg, RS and Wilson, CR, Germinate to exterminate: chemical stimulation of Spongospora subterranea resting spore germination and its potential to diminish soil inoculum, Plant Pathology, 67 pp. 902-908. ISSN 0032-0862 (2018) [Refereed Article]

Copyright Statement

Copyright 2017 British Society for Plant Pathology

DOI: doi:10.1111/ppa.12795

Abstract

Hoagland’s solution (HS), a defined nutrient supplement for plants, has been previously reported to stimulate zoospore release from resting spores of the potato pathogen Spongospora subterranea f. sp. subterranea. This study obtained direct empirical evidence for an increase in zoospore release with HS treatment, and identified Fe-EDTA as the stimulant component of HS. Stimulation of resting spores by HS and Fe-EDTA resulted in greater and earlier zoospore release compared to a distilled water control, and in the presence of a susceptible tomato host plant resulted in enhanced root infection. Given the labile nature of S. subterranea zoospores, it was postulated that stimulation of premature release of zoospores from the dormant resting spores in absence of susceptible hosts could reduce soil inoculum levels. In two glasshouse trials in the absence of host plants, both Fe-EDTA and HS soil treatments reduced S. subterranea soil inoculum levels, providing proof of concept for the ‘germinate to exterminate’ approach to inoculum management.

Item Details

Item Type:Refereed Article
Keywords:resting spore germination, inoculum control, spongospora, powdery scab, potato, chemical stimulants, Hoagland's solution, soil inoculum management, Spongospora root infection
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Horticultural Crop Protection (Pests, Diseases and Weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Vegetables
UTAS Author:Balendres, MA (Mr Mark Balendres)
UTAS Author:Clark, TJ (Miss Tamara Clark)
UTAS Author:Tegg, RS (Dr Robert Tegg)
UTAS Author:Wilson, CR (Professor Calum Wilson)
ID Code:126250
Year Published:2018
Web of Science® Times Cited:1
Deposited By:TIA - Research Institute
Deposited On:2018-05-31
Last Modified:2019-03-21
Downloads:0

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