A putative auxin efflux carrier FgAec1 contributes to the pathogenicity of Fusarium graminearum.

ABSTRACT:

Background

Auxin is crucial for plant growth and influences plant-pathogen interactions. Pathogen-produced indole-3-acetic acid (IAA) is crucial for pathogenicity; however, the role of plant-derived or pathogen-derived IAA in regulating plant defense responses remains poorly understood.

Results

In this study, two putative auxin efflux carrier (AEC) proteins, FgAec1 and FgAec2, were identified in Fusarium graminearum. To study the effects of the pathogen-derived auxins on Fusarium head blight (FHB), knockout mutants of FgAec1 or FgAec2 showed no effect on vegetative growth or conidia morphology. However, the Δfgaec1 mutant (but not the Δfgaec2 mutant) exhibited reduced growth and development in wheat spikes, indicating that FgAec1 is a key pathogenic factor. Deletion of FgAec

SUBMITTER: Hu S 

PROVIDER: S-EPMC12577076 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature