Germination of <Emphasis Type="Italic">Plasmodiophora brassicae</Emphasis> resting spores stimulated by a non-host plant |
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| Authors: | Email author" target="_blank">Hanna?FribergEmail author Jan?Lagerl?f Birgitta?R?mert |
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| Institution: | (1) Department of Ecology and Crop Production Science, Swedish University of Agricultural Sciences, P.O. Box 7043, SE−750 07 Uppsala, Sweden |
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| Abstract: | Plant-induced germination of Plasmodiophora brassicae resting spores was studied in a laboratory experiment. Spore reaction was analysed in nutrient solution with exudates from
growing roots of different plant species – one host plant (Brassica rapa var. pekinensis) and four non-host plants (Lolium perenne, Allium porrum, Secale cereale and Trifolium pratense) – and in controls with distilled water and nutrient solution. It was found that root exudates from L. perenne stimulated spore germination more than exudates from the other plants, including those from the host plant. The effect could
not be explained by differences in the nutritional composition of the solutions due to differential uptake of the plant species,
or by differences in root activity, measured as exudation of soluble sugars. This is the first time such a separation of factors
has been done in analysing the influence of plants on P. brassicae germination. Although stimulation of P. brassicae resting spore germination is not restricted to the presence of host plants, it seems to vary depending on the plant species. |
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| Keywords: | Brassicaceae clubroot disease germination-stimulating factor Lolium perenne partial least square regression root exudate |
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