Thermal generalist behaviour of invasive Puccinia striiformis f. sp. tritici strains under current and future climate conditions

• DOI: 10.1111/ppa.12840
• Publication Date: 2018-02-06T13:09:02Z
• Authors: C. de Vallavieill...; B. Bahri; M. Leconte; O. Zurfluh; Y. Belaid; E. Maghrebi; F. Huard; L. Huber; M. Launay; M. O. Bancal
• Keywords: Infectivity; Maximum temperature; Puccinia striiformis

Yellow rust is a devastating wheat disease. Since 2000, Puccinia striiformis f. sp. tritici strains PstS1 and PstS2 have become adapted to high temperatures spread worldwide. By 2011, Warrior had invaded both warm cold areas of Europe. This study questioned whether thermal aptitude promoted the strains, similar PstS1/PstS2, by comparing infection efficiency ( IE ) at five latent period LP under regimes for isolates pre‐2011 reference on two susceptible varieties. The showed range responses temperature that was intermediate between northern conditions southern invasive conditions. highest optimal 10 15 °C, displayed reduced infectivity warmest (20 °C) coldest (5 temperatures. acted as generalists specialists. An response used simulate development each isolate future climate scenarios in temperate Mediterranean region. Isolates same ranking yearly over three 30‐year periods (1971–2000, 2021–2050, 2071–2100) locations, with slight increase future. However, s increased earlier months. generalist profile confirmed, an capacity tolerate warming climate, whereas are better conditions, but do not virulences necessary develop current