Abstract
Pea plants,Pisum sativum cv. Eminent, were inoculated by spraying with a suspension (108 cells/ml) ofPseudomonas phaseolicola, a bacterium not pathogenic to pea. At intervals of 0,2,4,6, or 8 days the same plants were challenged with a conidial suspension (106 conidia/ml) of the peapathogenic fungusMycosphaerella pinodes. Periodically, leaf samples were examined for development of symptoms and phytoalexin content.
Up to 6 days after inoculation with the non-pathogenic bacterium the plants were protected against the pathogenic fungus. Pisatin, however, seemed not to be responsible for the observed protection.
Samenvatting
Erwteplanten, cv. Eminent, werden bespoten met een suspensie (108 bacteriën/ml) vanPseudomonas phaseolicola, een bacterie die niet pathogeen is voor erwt. Na 0,2,4,6, of 8 dagen werden dezelfde planten opnieuw geïnoculeerd, nu echter met een conidiënsuspensie (106 conidiën/ml) van de voor erwt pathogene schimmelMycosphaerella pinodes. Periodiek werden bladmonsters beoordeeld naar ontwikkeling van symptomen en aanwezigheid van fytoalexinen.
Tot 6 dagen na de inoculatie met de niet-pathogene bacterie bleken de planten—in afnemende mate — beschermd tegen aantasting door de pathogene schimmel. Aangezien er geen positieve correlatie bleek te bestaan tussen de pisatineconcentratie en de mate van bescherming, leek pisatine voor deze bescherming niet verantwoordelijk.
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Platero Sanz, M., Fuchs, A. Short-lived protection of pea plants against Mycosphaerella pinodes by prior inoculation with Pseudomonas phaseolicola. Netherlands Journal of Plant Pathology 86, 181–190 (1980). https://doi.org/10.1007/BF01989710
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DOI: https://doi.org/10.1007/BF01989710