European Journal of Plant Pathology (2008) 121, 189-194

Kazutaka Kido, Tomofumi Mochizuki, Kazutoshi Matsuo, Chika Tanaka, Kenji Kubota, Takehiro Ohki and Shinya Tsuda (2008)
Functional degeneration of the resistance gene nsv against melon necrotic spot virus at low temperature
European Journal of Plant Pathology 121 (2), 189-194
Abstract: The single recessive gene, nsv, which confers resistance against Melon necrotic spot virus (MNSV), has recently been used to develop virus-resistant melon cultivars in Japan. However, the Chiba isolate of MNSV, a common isolate in Japan, infected resistant cultivars when inoculated melon plants were grown at 15°C. Viral RNAs accumulated in protoplasts from resistant cultivars at both 15 and 20°C. Mechanical inoculation of the cotyledons caused MNSV to spread throughout the leaves at 15°C, but not at 20°C. These results support our novel hypothesis that a temperature-sensitive inactivation of disease resistance genes occurs at the nsv locus in melon cultivars with the resistance gene grown at temperatures below 20°C.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Tomofumi Mochizuki, Takehiro Ohki

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Gammacarmovirus melonis	Melon (Cucumis melo)	Japan