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Moments of weaknesses - exploiting vulnerabilities between germination and encystment in the Phytomyxea


Amponsah, J and Tegg, RS and Thangavel, T and Wilson, CR, Moments of weaknesses - exploiting vulnerabilities between germination and encystment in the Phytomyxea, Biological Reviews, 96, (4) pp. 1603-1615. ISSN 1464-7931 (2021) [Refereed Article]

Copyright Statement

Copyright 2021 Cambridge Philosophical Society

DOI: doi:10.1111/brv.12717


Attempts at management of diseases caused by protozoan plant parasitic Phytomyxea have often been ineffective. The dormant life stage is characterised by long-lived highly robust resting spores that are largely impervious to chemical treatment and environmental stress. This review explores some life stage weaknesses and highlights possible control measures associated with resting spore germination and zoospore taxis. With phytomyxid pathogens of agricultural importance, zoospore release from resting spores is stimulated by plant root exudates. On germination, the zoospores are attracted to host roots by chemoattractant components of root exudates. Both the relatively metabolically inactive resting spore and motile zoospore need to sense the chemical environment to determine the suitability of these germination stimulants or attractants respectively, before they can initiate an appropriate response. Blocking such sensing could inhibit resting spore germination or zoospore taxis. Conversely, the short life span and the vulnerability of zoospores to the environment require them to infect their host within a few hours after release. Identifying a mechanism or conditions that could synchronise resting spore germination in the absence of host plants could lead to diminished pathogen populations in the field.

Item Details

Item Type:Refereed Article
Keywords:Phytomyxea, review
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture protection (incl. pests, diseases and weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Field grown vegetable crops
UTAS Author:Amponsah, J (Mr Jonathan Amponsah)
UTAS Author:Tegg, RS (Dr Robert Tegg)
UTAS Author:Thangavel, T (Dr Tamil Thangavel)
UTAS Author:Wilson, CR (Professor Calum Wilson)
ID Code:145187
Year Published:2021
Funding Support:Australian Research Council (DP180103337)
Web of Science® Times Cited:3
Deposited By:TIA - Research Institute
Deposited On:2021-07-08
Last Modified:2021-09-01

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