1. Below-Ground Attack by the Root Knot Nematode Meloidogyne graminicola Predisposes Rice to Blast Disease
- Author
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David De Vleesschauwer, Monica Höfte, Simon Denil, Richard Raj Singh, Tim De Meyer, Tina Kyndt, Kristof Demeestere, Ashley Haeck, Henok Yimer Zemene, and Godelieve Gheysen
- Subjects
0106 biological sciences ,0301 basic medicine ,Physiology ,Plant Immunity ,Biology ,Plant disease resistance ,medicine.disease_cause ,01 natural sciences ,Plant Roots ,Microbiology ,03 medical and health sciences ,Plant Growth Regulators ,Auxin ,Gene Expression Regulation, Plant ,Botany ,medicine ,Magnaporthe grisea ,Root-knot nematode ,Animals ,Tylenchoidea ,Plant Diseases ,chemistry.chemical_classification ,Indoleacetic Acids ,Gene Expression Profiling ,food and beverages ,Oryza ,General Medicine ,biology.organism_classification ,medicine.disease ,Magnaporthe ,Oxidative Stress ,030104 developmental biology ,Nematode ,chemistry ,Nematode infection ,Transcriptome ,Agronomy and Crop Science ,Oxidative stress ,Plant Shoots ,010606 plant biology & botany - Abstract
Magnaporthe oryzae (rice blast) and the root-knot nematode Meloidogyne graminicola are causing two of the most important pathogenic diseases jeopardizing rice production. Here, we show that root-knot nematode infestation on rice roots leads to important above-ground changes in plant immunity gene expression, which is correlated with significantly enhanced susceptibility to blast disease. A detailed metabolic analysis of oxidative stress responses and hormonal balances demonstrates that the above-ground tissues have a disturbed oxidative stress level, with accumulation of H2O2, as well as hormonal disturbances. Moreover, double infection experiments on an oxidative stress mutant and an auxin-deficient rice line indicate that the accumulation of auxin in the above-ground tissue is at least partly responsible for the blast-promoting effect of root-knot nematode infection.
- Published
- 2017