Germination of surface-disinfected resting spores ofPlasmodiophora brassicae and their root hair infection in turnip hairy roots |
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Authors: | Takahiro Asano Koji Kageyama Mitsuro Hyakumachi |
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Institution: | (1) Laboratory of Plant Disease Science, The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, 501-1193 Gifu, Japan |
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Abstract: | Germination of surface-disinfected resting spores ofPlasmodiophora brassicae and its infection of turnip hairy root hairs were studied. Surface-disinfected resting spores showed higher germination than
non-disinfected resting spores. Root hair infection was most frequent in the section of root formed 1 d before inoculation.
Root hair infection began 4 d after inoculation, increased up to 6 d, and continued to increase more slowly until 10 to 12
d after inoculation. Growth ofP. brassicae in the root hair of hairy roots was observed serially. Most primary plasmodia differentiated to mature zoosporangia 8–10
d after inoculation. The secondary zoospores were initially released 6 d after inoculation. |
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Keywords: | hairy root Plasmodiophora brassicae root hair infection serial observation |
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