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The role of strigolactones during plant interactions with the pathogenic fungus Fusarium oxysporum

Citation

Foo, E and Blake, SN and Fisher, BJ and Smith, JA and Reid, JB, The role of strigolactones during plant interactions with the pathogenic fungus Fusarium oxysporum, Planta, 243, (6) pp. 1387-1396. ISSN 0032-0935 (2016) [Refereed Article]

Copyright Statement

Copyright Springer-Verlag Berlin Heidelberg 2015

DOI: doi:10.1007/s00425-015-2449-3

Abstract

Strigolactones (SLs) play important roles both inside the plant as a hormone and outside the plant as a rhizosphere signal in interactions with mycorrhizal fungi and parasitic weeds. What is less well understood is any potential role SLs may play in interactions with disease causing microbes such as pathogenic fungi. In this paper we investigate the influence of SLs on the hemibiotrophic pathogen Fusarium oxysporum f.sp. pisi both directly via their effects on fungal growth and inside the plant through the use of a mutant deficient in SL. Given that various stereoisomers of synthetic and naturally occuring SLs can display different biological activities, we used (+)-GR24, (−)-GR24 and the naturally occurring SL, (+)-strigol, as well as a racemic mixture of 5-deoxystrigol. As a positive control, we examined the influence of a plant mutant with altered ethylene signalling, ein2, on disease development. We found no evidence that SLs influence spore germination or hyphal growth of Fusarium oxysporum and that, while ethylene signalling influences pea susceptibility to this pathogen, SLs do not.

Main conclusion: Strigolactones (SLs) do not influence spore germination or hyphal growth of Fusarium oxysporum. Mutant studies revealed no role for SLs but a role for ethylene signalling in defence against this pathogen in pea.

Item Details

Item Type:Refereed Article
Keywords:strigolactone, disease, Fusarium oxysporum, ethylene, pea
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Environmentally Sustainable Plant Production
Objective Field:Environmentally Sustainable Plant Production not elsewhere classified
Author:Foo, E (Dr Eloise Foo)
Author:Blake, SN (Mrs Sara Blake)
Author:Fisher, BJ (Mr Brendan Fisher)
Author:Smith, JA (Associate Professor Jason Smith)
Author:Reid, JB (Professor Jim Reid)
ID Code:106632
Year Published:2016
Funding Support:Australian Research Council (FT140100770)
Web of Science® Times Cited:7
Deposited By:Plant Science
Deposited On:2016-02-16
Last Modified:2017-11-02
Downloads:0

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