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Survival Factor Gene FgSvf1 Is Required for Normal Growth and Stress Resistance in Fusarium graminearum
Plant Pathol. J. 2019;35:393-405
Published online October 1, 2019
© 2019 The Korean Society of Plant Pathology.

Taiying Li1, Boknam Jung1, Sook-Young Park2, and Jungkwan Lee1*

1Department of Applied Biology, Dong-A University, Busan 49315, Korea
2Department of Plant Medicine, Sunchon National University, Suncheon 57922, Korea
Correspondence to: Phone) +82-51-200-7554, FAX) +82-51-200-7505

Handling Editor : Kim, Hun
Received March 28, 2019; Revised May 29, 2019; Accepted May 30, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Survival factor 1 (Svf1) is a protein involved in cell survival pathways. In Saccharomyces cerevisiae, Svf1 is required for the diauxic growth shift and survival under stress conditions. In this study, we characterized the role of FgSvf1, the Svf1 homolog in the homothallic ascomycete fungus Fusarium graminearum. In the FgSvf1 deletion mutant, conidial germination was delayed, vegetative growth was reduced, and pathogenicity was completely abolished. Although the FgSvf1 deletion mutant produced perithecia, the normal maturation of ascospore was dismissed in deletion mutant. The FgSvf1 deletion mutant also showed reduced resistance to osmotic, fungicide, and cold stress and reduced sensitivity to oxidative stress when compared to the wild-type strain. In addition, we showed that FgSvf1 affects glycolysis, which results in the abnormal vegetative growth in the FgSvf1 deletion mutant. Further, intracellular reactive oxygen species (ROS) accumulated in the FgSvf1 deletion mutant, and this accumulated ROS might be related to the reduced sensitivity to oxidative stress and the reduced resistance to cold stress and fungicide stress. Overall, understanding the role of FgSvf1 in F. graminearum provides a new target to control F. graminearum infections in fields.
Keywords : Fusarium graminearum, reactive oxygen species, stress, survival factor 1, vegetative growth

October 2019, 35 (5)
  • DOAJ