Journal
JOURNAL OF PHYTOPATHOLOGY
Volume 166, Issue 2, Pages 86-94Publisher
WILEY
DOI: 10.1111/jph.12664
Keywords
Cystoseira myriophylloides; Fucus spiralis; Laminaria digitata; priming; Pseudomonas syringae pv; tabaci; wild fire
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Funding
- Moroccan CNRST (Centre National de Recherche Scientifique et Technique)
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Extracts from the brown seaweeds Cystoseira myriophylloides, Laminaria digitata and Fucus spiralis were evaluated as plant defence inducers against the wild fire disease of Nicotiana benthamiana. Seeds' imbibition in aqueous seaweed extracts (SE) results in plants with reduced disease severity. In addition, bacterial populations were significantly reduced in these plants when compared to those germinated in sterile distilled water. They primed N.benthamiana for H2O2 accumulation and for enhanced activity of several antioxidant enzymes including catalase, ascorbate peroxidase, guaiacol peroxidase and polyphenol oxidase. These results revealed that soaking of seeds in SE before sowing allows N.benthamiana to reduce pathogen attack and can be easily applied in practice.
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