Interplay between Coumarin Accumulation, Iron Deficiency and Plant Resistance to Dickeya spp

Coumarins belong to a group of secondary metabolites well known for their high biological activities including antibacterial and antifungal properties. Recently, an important role of coumarins in plant resistance to pathogens and their release into the rhizosphere upon pathogen infection was discove...

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Published in:International journal of molecular sciences 2021-06, Vol.22 (12), p.6449
Main Authors: Perkowska, Izabela, Potrykus, Marta, Siwinska, Joanna, Siudem, Dominika, Lojkowska, Ewa, Ihnatowicz, Anna
Format: Article
Language:English
Subjects:
abiotic stress
Accumulation
Arabidopsis
Bacteria
Biosynthesis
biotic stress
Coumarin
Drug resistance
Enzymes
fraxetin
Fungicides
Gene expression
Genes
Genotypes
Homeostasis
Infections
iron deficiency
Metabolites
Microorganisms
Molecular interactions
Nutrient deficiency
pathogen
Pathogens
Plant growth
Plant resistance
Plant stress
Rhizosphere
scopoletin
Secondary metabolites
Signs and symptoms
Virulence
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Summary:Coumarins belong to a group of secondary metabolites well known for their high biological activities including antibacterial and antifungal properties. Recently, an important role of coumarins in plant resistance to pathogens and their release into the rhizosphere upon pathogen infection was discovered. It is also well documented that coumarins play a crucial role in the Arabidopsis thaliana growth under Fe-limited conditions. However, the mechanisms underlying interplay between plant resistance, accumulation of coumarins and Fe status, remain largely unknown. In this work, we investigated the effect of both mentioned factors on the disease severity using the model system of Arabidopsis/Dickeya spp. molecular interactions. We evaluated the disease symptoms in Arabidopsis plants, wild-type Col-0 and its mutants defective in coumarin accumulation, grown in hydroponic cultures with contrasting Fe regimes and in soil mixes. Under all tested conditions, Arabidopsis plants inoculated with Dickeya solani IFB0099 strain developed more severe disease symptoms compared to lines inoculated with Dickeya dadantii 3937. We also showed that the expression of genes encoding plant stress markers were strongly affected by D. solani IFB0099 infection. Interestingly, the response of plants to D. dadantii 3937 infection was genotype-dependent in Fe-deficient hydroponic solution.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms22126449