Abstract
Recognition of specific molecule signatures of microbes, including pathogens, induces innate immune responses in plants, as well as in animals. Analogously, a nematode pheromone, the ascaroside ascr#18, induces hallmark plant defences including activation of (a) mitogen-activated protein kinases, (b) salicylic acid- and jasmonic acid-mediated defence signalling pathways and (c) defence gene expression and provides protection to a broad spectrum of pathogens. Ascr#18 is a member of an evolutionarily conserved family of nematode signalling molecules and is the major ascaroside secreted by plant–parasitic nematodes. Here, we report the effects of ascr#18 on resistance in four of the major economically important crops: maize, rice, wheat and soybean to some of their associated pathogens. Treatment with low nanomolar to low micromolar concentrations of ascr#18 provided from partial to strong protection in seven of eight plant–pathogen systems tested with viruses, bacteria, fungi, oomycetes and nematodes. This research may have potential to improve agricultural sustainability by reducing use of potentially harmful agrochemicals and enhance food security worldwide.
Original language | English |
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Pages (from-to) | 265-272 |
Number of pages | 8 |
Journal | Journal of Phytopathology |
Volume | 167 |
Issue number | 5 |
DOIs | |
State | Published - May 2019 |
Bibliographical note
Funding Information:Agriculture National Institute for Food and Agriculture award 2017-67013-26535 (D.F.K. and F. C. S.), the Colorado Agricultural Experiment Station (E.L. and J.E.L.), the US Department of Agriculture (Agricultural Food and Research Initiative award 2013-02577 to V.M.W.), the Kentucky Soybean Promotion Board (A.K.) and the German Minister of Education and Research (BMBF) award PrimedPlant (K.H.K).
Funding Information:
This work was supported by grants from the US Department of
Publisher Copyright:
© 2019 Blackwell Verlag GmbH
Keywords
- crop protection
- disease resistance
- nematode ascarosides
- nematode resistance
ASJC Scopus subject areas
- Physiology
- Agronomy and Crop Science
- Genetics
- Plant Science