Introduction of durable resistance genes in crops is an important strategy to prevent yield loss caused by pathogens. The durable multi-pathogen resistance gene Lr34 originating from wheat is widely used in breeding, and is functionally transferable to barley and rice. The molecular resistance mechanism of Lr34, encoding for an adenosine triphosphate-binding cassette transporter, is not known yet. To understand the molecular function and the defense response of durable disease resistance in cereals, the metabolic response of Lr34 was investigated in, except for the Lr34 gene, genetically identical lines of barley, rice and wheat. A broad range of compounds including primary, secondary and lipophilic metabolites were analyzed by a combination of gas (GC) and liquid chromatography (LC) mass spectrometry (MS) based methods. Data from metabolomics correlated well with transcriptomics data for plant defense responses such as the formation of anti-fungal hordatines or the components of the glyoxylate cycle. Induction of the glyoxylate cycle found in transgenic Lr34 rice grown in the greenhouse was confirmed in field-grown natural Lr34 wheat. Constitutively active plant defense responses were observed in the different cereals.
|Original language||English (US)|
|Number of pages||4|
|State||Published - 2017|
Bibliographical noteFunding Information:
This work was supported by Swiss National Science Foundation Doc. Mobility grant 158657. We thank Rainer Böni, Justine Sucher and Jyoti Singla for plant growth, Änne Michaelis and Gudrun Wolther for their excellent technical support, Dirk Steinhauser for the design of experiment and Alexander Erban and Asdrubal Burgos for their help with primary metabolite and lipid identification.
© Swiss Chemical Society
- Mass spectrometry
- Plant defense
- Plant metabolomics
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