title: A non-linear model for temperature-dependent sporulation and T-2 and HT-2 production of Fusarium langsethiae and Fusarium sporotrichioides.
abstract: This research has produced new quantitative data on the sporulation and T-2+HT-2 toxin production that could be further integrated to develop a comprehensive disease or toxin prediction model for Fusarium langsethiae and Fusarium sporotrichioides. Experiments were conducted to determine the effect of temperature or incubation time on sporulation and the effect of temperature on T-2+HT-2 toxin production of strains of the two species. F. sporotrichioides demonstrated a preference for higher temperatures than F. langsethiae during sporulation; the optimum temperature was 24.5 ± 0.7 °C for F. langsethiae and 32.3 ± 2.1 °C for F. sporotrichioides, according to the Beta equation fitted to the data. The dynamics of sporulation over different incubation times were fitted by a Gompertz function. The maximum spore production was estimated to be after 18 and 8 d incubation at optimum temperatures for F. langsethiae and F. sporotrichioides, respectively. F. sporotrichioides produced more T-2+HT-2 than F. langsethiae. The best fit of the effect of temperature on T-2+HT-2 production in wheat grains was obtained with a Beta equation showing an optimum temperature of 14.7 ± 0.8 °C for F. langsethiae and 12.1 ± 0.2 °C for F. sporotrichioides. The optimum temperature for mycotoxin production was lower than for sporulation.
authors.affiliation: Department of Agriculture, Payam Noor University (PNU), P.O.BOX 19395-3697 Tehran, Iran; Department of Sustainble Crop Production, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy. Electronic address: nazarilaila@yahoo.com.
authors.forename: Leyla
authors.initials: L
authors.lastname: Nazari
authors.affiliation: Department of Sustainble Crop Production, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy.
authors.forename: Valentina
authors.initials: V
authors.lastname: Manstretta
authors.affiliation: Department of Sustainble Crop Production, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy.
authors.forename: Vittorio
authors.initials: V
authors.lastname: Rossi
mesh_terms: D056808:Biostatistics; D005670:Fusarium / Q000254:growth & development* / Q000378:metabolism* / Q000528:radiation effects; D017711:Nonlinear Dynamics; D013172:Spores, Fungal / Q000254:growth & development*; D013605:T-2 Toxin / Q000031:analogs & derivatives* / Q000378:metabolism*; D013696:Temperature; D014908:Triticum
chemical_list: D013605:T-2 Toxin; C012351:HT-2 toxin
keywords: Fusaria; Modelling; Spore production; Sporotrichiella; Temperature; Type A trichothecenes