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The role of strigolactones and ethylene in disease caused by Pythium irregulare


Blake, SN and Barry, KM and Gill, WM and Reid, JB and Foo, E, The role of strigolactones and ethylene in disease caused by Pythium irregulare, Molecular Plant Pathology, 17, (5) pp. 680-690. ISSN 1464-6722 (2016) [Refereed Article]

Copyright Statement

Copyright 2015 BSPP AND JOHN WILEY

DOI: doi:10.1111/mpp.12320


Plant hormones play key roles in defence against pathogen attack. Recent work has begun to extend this role to encompass not just the traditional disease/stress hormones, such as ethylene, but also growth-promoting hormones. Strigolactones (SLs) are the most recently defined group of plant hormones with important roles in plant–microbe interactions, as well as aspects of plant growth and development, although the knowledge of their role in plant– pathogen interactions is extremely limited. The oomycete Pythium irregulare is a poorly controlled pathogen of many crops. Previous work has indicated an important role for ethylene in defence against this oomycete. We examined the role of ethylene and SLs in response to this pathogen in pea (Pisum sativum L.) at the molecular and whole-plant levels using a set of well-characterized hormone mutants, including an ethylene-insensitive ein2 mutant and SL-deficient and insensitive mutants.We identified a key role for ethylene signalling in specific cell types that reduces pathogen invasion, extending the work carried out in other species. However, we found no evidence that SL biosynthesis or response influences the interaction of pea with P. irregulare or that synthetic SL influences the growth or hyphal branching of the oomycete in vitro. Future work should seek to extend our understanding of the role of SLs in other plant interactions, including with other fungal, bacterial and viral pathogens, nematodes and insect pests.

Item Details

Item Type:Refereed Article
Keywords:strigolactone, disease, Pythium irregulare, 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
UTAS Author:Blake, SN (Mrs Sara Blake)
UTAS Author:Barry, KM (Associate Professor Kara Barry)
UTAS Author:Gill, WM (Dr Warwick Gill)
UTAS Author:Reid, JB (Professor Jim Reid)
UTAS Author:Foo, E (Associate Professor Eloise Foo)
ID Code:106630
Year Published:2016
Funding Support:Australian Research Council (FT140100770)
Web of Science® Times Cited:21
Deposited By:Plant Science
Deposited On:2016-02-16
Last Modified:2021-08-17

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