title: A Model to Explain Temperature Dependent Systemic Infection of Potato Plants byPotato virus Y.
abstract: The effect of temperature on the rate of systemic infection of potatoes (Solanum tuberosumL. cv. Chu-Baek) byPotato virus Y(PVY) was studied in growth chambers. Systemic infection of PVY was observed only within the temperature range of 16°C to 32°C. Within this temperature range, the time required for a plant to become infected systemically decreased from 14 days at 20°C to 5.7 days at 28°C. The estimated lower thermal threshold was 15.6°C and the thermal constant was 65.6 degree days. A systemic infection model was constructed based on experimental data, using the infection rate (Lactin-2 model) and the infection distribution (three-parameter Weibull function) models, which accurately described the completion rate curves to systemic infection and the cumulative distributions obtained in the PVY-potato system, respectively. Therefore, this model was useful to predict the progress of systemic infections by PVY in potato plants, and to construct the epidemic models.
authors.affiliation: Research Institute of Climate Change and Agriculture, National Institute of Horticultural and Herbal Science, Rural Development Administration, Jeju 63240, Korea.
authors.forename: Kyung San
authors.initials: KS
authors.lastname: Choi
authors.affiliation: Biological Research Center, Spanish Council for Scientific Research (CIB-CSIC), Madrid 28040, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Del Toro
authors.affiliation: Biological Research Center, Spanish Council for Scientific Research (CIB-CSIC), Madrid 28040, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Tenllado
authors.affiliation: Biological Research Center, Spanish Council for Scientific Research (CIB-CSIC), Madrid 28040, Spain.
authors.forename: Tomas
authors.initials: T
authors.lastname: Canto
authors.affiliation: Research Institute of Climate Change and Agriculture, National Institute of Horticultural and Herbal Science, Rural Development Administration, Jeju 63240, Korea.
authors.forename: Bong Nam
authors.initials: BN
authors.lastname: Chung
keywords: Chu-Baek; Potato virus Y; potato; systemic infection model; temperature