Abstract
THE increased activity of oxidative enzymes in plants caused by fungi, viruses or other organisms has been known for many decades1. It has also been suggested that the resistance of plants to micro-organisms was due to compounds, probably phenolics, which were formed after the invasion of the pathogen2. Since then in many cases correlations between higher activities of phenol oxidases or peroxidases and resistance have been reported3. In the case of halo blight of beans, it was suggested that peroxidases play a part in resistance4. In fungus-infected beans the appearance of a ‘phytoalexin’ which induced resistance has been reported5, but recent investigations showed that it was difficult to explain all resistant reactions in bean plants with only the phytoalexin concept6. It is not known if a specific compound induces resistance against the halo blight organism or if a general enhancement of oxidative processes (hypersensitive reaction) is the primary cause of resistance.
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RUDOLPH, K., STAHMANN, M. Interactions of Peroxidases and Catalases between Phaseolus vulgaris and Pseudomonas phaseolicola (Halo Blight of Bean). Nature 204, 474–475 (1964). https://doi.org/10.1038/204474a0
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DOI: https://doi.org/10.1038/204474a0
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