THE EFFECT OF MICRONUTRIENTS ON THE GERMINATION AND INFECTION OF PLASMODIOPHORA BRASSICAE

M. Lewis, A. Wakeham , R. Kennedy
Within soil there are many factors such as nutrient levels that can interact, having a combined influence on the clubroot resting spores in the soil. This makes it difficult to determine the individual significance of each factor on the organism. In a controlled system such as that observed in a seedling assay, the detection of P. brassicae by molecular methods means that it is possible to assess the effect of factors both individually and in combination. There are limitations to seedling assays however the effects of copper, boron, zinc, molybdenum and manganese on P. brassicae germination and primary infection were studied using this system.
The presence of copper decreased the level of root tissue infection and the concentration of copper was significant to the rate of decrease in infection. Similarly boron was also found to decrease the level of root infection, and again the concentration of boron was also significant. The presence of zinc was not found to have a significant effect at 0.5 mEq L-1 but at the higher concentration of 1 mEq L-1 there was a significant effect on the level of root tissue infection. The presence of all of the nutrients tested increased the rate of spore germination except for molybdenum at 0.5 mEq L-1. The level of treatment applied was only significant to root infection for boron and copper while the remaining micro nutrients applied at different levels were not significant on infection following resting spore germination.
Lewis, M., Wakeham , A. and Kennedy, R. (2013). THE EFFECT OF MICRONUTRIENTS ON THE GERMINATION AND INFECTION OF PLASMODIOPHORA BRASSICAE. Acta Hortic. 1005, 607-612
DOI: 10.17660/ActaHortic.2013.1005.75
https://doi.org/10.17660/ActaHortic.2013.1005.75
clubroot disease, quantitative polymerase chain reaction, nutrients
English

Acta Horticulturae