The AP-1 Sigma Subunit Gene PsAP1 Acts as a Key Pathogenicity Factor by Regulating Metabolic Reprogramming in Puccinia striiformis f. sp. tritici.

ABSTRACT: Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), poses a severe threat to global wheat production. The adaptor protein complex AP-1 plays a crucial role in vesicular trafficking, yet its function in rust fungi remains poorly understood. In this study, a gene encoding an AP-1 σ subunit, designated PsAP1, was identified in Pst. The expression of PsAP1 was highly induced during the early infection stage. Heterologous expression of PsAP1 in a Fusarium graminearum mutant partially restored its pathogenic defects. Subcellular localization analysis revealed that PsAP1 localizes to the plasma membrane, cytoplasm, and nucleus. Silencing PsAP1 in wheat using Barley stripe mosaic virus-mediated host-induced gene silencing (BSMV-HIGS) significantly attenuate

SUBMITTER: Liu B 

PROVIDER: S-EPMC12842939 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature