Yellow rust infection of wheat: How the quantity of light received by wheat seedlings before inoculation affects infection efficiency

• DOI: 10.1111/ppa.13977
• Publication Date: 2024-08-01T12:41:26Z
• Authors: Camila M. Zanella; Ruth MacCormack; John Caulfield; Anna Gordon; Huw Jones; Amelia Hubbard; Lesley A. Boyd
• Keywords: Urediniospore; Rust (programming language)

Abstract Many factors are known to influence infection by cereal rusts, including environmental variables such at light, humidity and temperature, the topography of leaf surface, as well plant volatiles. However, few studies have aimed link these factors. Previously, quantity light received wheat seedlings prior inoculation with Puccinia striiformis f. sp. tritici (Pst) urediniospores was shown yellow rust efficiency. In this study we show that germination ability germlings (germinated urediniospores) enter stomata is enhanced on subjected high quantities pre‐inoculation Pst urediniospores, while exposed a long dark period were compromised. Using headspace collections gas chromatography–mass spectrometry (GC–MS) analysis thereof, effect quantitative changes in profile volatile organic compounds (VOCs). We VOCs within from able support greater levels urediniospore than dark. vitro individual identified germination. These included sesquiterpene caryophyllene, monoterpene α‐pinene, fatty acid α‐linolenic acid, alcohols 1‐hexanol, 3‐hexen‐1‐ol 5‐hexen‐1‐ol, aldehyde cis ‐3‐hexenal ester hexyl acetate.