title: Influence of temperature on infection, growth, and mycotoxin production by Fusarium langsethiae and F. sporotrichioides in durum wheat.
abstract: Information concerning the temperature requirements of the species causing Fusarium head blight of small grains is essential for understanding which species cause the disease in different areas and years, for developing weather-driven disease models, and for predicting mycotoxin type and quantity in kernels. The optimal temperature range for growth was 20-25 °C for Fusarium langsethiae and 25-30 °C for F. sporotrichioides, and the optimum for production of both T-2 and HT-2 toxins was 15 °C for F. langsethiae and 10-15 °C for F. sporotrichioides. Floret infection occurred from 10 to 40 °C for F. sporotrichioides (69.8% average incidence of infected florets) and from 10 to 35 °C for F. langsethiae (17.6% of infected florets). The optimal temperature for spike colonisation was 25 °C for F. langsethiae and 30 °C for F. sporotrichioides, and the optimal temperature range for mycotoxin production was 15-35 °C for F. langsethiae and 20-25 °C for F. sporotrichioides. The quantity of fungal DNA in inoculated spikes was 5.5-times greater for F. sporotrichioides than for F. langsethiae; F. langsethiae DNA was first detected 2 days post-inoculation (dpi), and F. sporotrichioides DNA was first detected 4 dpi. Toxins were first detected 4 and 2 dpi for F. langsethiae and F. sporotrichioides, respectively.
authors.affiliation: Istituto di Entomologia e Patologia vegetale, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29100 Piacenza, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Nazari
authors.affiliation: Istituto di Entomologia e Patologia vegetale, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29100 Piacenza, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Pattori
authors.affiliation: Consiglio per la Ricerca e la Sperimentazione in Agricoltura, CRA-GPG, Genomics Research Centre, I-29017 Fiorenzuola d'Arda (PC), Italy.
authors.forename: V
authors.initials: V
authors.lastname: Terzi
authors.affiliation: Consiglio per la Ricerca e la Sperimentazione in Agricoltura, CRA-GPG, Genomics Research Centre, I-29017 Fiorenzuola d'Arda (PC), Italy.
authors.forename: C
authors.initials: C
authors.lastname: Morcia
authors.affiliation: Istituto di Entomologia e Patologia vegetale, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29100 Piacenza, Italy. Electronic address: vittorio.rossi@unicatt.it.
authors.forename: V
authors.initials: V
authors.lastname: Rossi
mesh_terms: D005670:Fusarium / Q000254:growth & development* / Q000378:metabolism*; D009183:Mycotoxins / Q000378:metabolism*; D010935:Plant Diseases / Q000382:microbiology*; D013045:Species Specificity; D013696:Temperature; D014908:Triticum / Q000382:microbiology*
chemical_list: D009183:Mycotoxins
keywords: DNA; Fusarium; Infection; Mycotoxins; Temperature; Type A trichothecenes; Wheat