An epidemiological survey of Chrysanthemum chlorotic mottle viroid in Akita Prefecture as a model region in Japan |
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Authors: | Hideki Yamamoto Teruo Sano |
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Institution: | (1) Agricultural Experiment Station, Akita Prefectural Agriculture, Forestry and Fisheries Research Center, Yuwa-aikawa, Akita 010-1231, Japan;(2) Plant Pathology Laboratory, Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan |
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Abstract: | In epidemiological surveys on Chrysanthemum chlorotic mottle viroid (CChMVd) in various chrysanthemums cultivated in Akita Prefecture, Japan, in 2002–2005, approximately 20% of cultivars harbored
CChMVd, including more symptomatic types than nonsymptomatic. Large-flowered cultivars were less frequently infected than
small-flowered and spray types. The number of CChMVd-infected chrysanthemums is increasing, and the disease is found throughout
major chrysanthemum-producing districts. Chrysanthemums infected only with CChMVd, in general, had no noticeable symptoms
of disease. Most of those dually infected with known viruses and/or viroid also had no symptoms characteristic of chlorotic
mottle disease. The lack of noticeable symptoms in major Japanese cultivars may have resulted in the unnoticed spread of the
viroid. |
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Keywords: | Chrysanthemum Chrysanthemum chlorotic mottle viroid Epidemiology RT-PCR |
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