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Identification and Pathogenicity of Fusarium Fungi Associated with Dry Rot of Potato Tubers

Summary

Researchers identified different Fusarium fungi causing potato dry rot in Russia and tested how they grow at various temperatures and how aggressively they damage potatoes. They found that F. sambucinum is the most dangerous because it can grow and cause rot even during cold storage, unlike other species. This research helps farmers understand which pathogens threaten their crops and how storage conditions affect disease development.

Background

Dry rot of potato tubers is a significant crop disease caused by Fusarium species, reducing food and seed quality. Studies on Fusarium composition causing this disease in Russia are limited. Understanding species diversity and physiological characteristics is essential for disease prevention and control.

Objective

To accurately identify Fusarium strains isolated from potato tubers with dry rot symptoms using multilocus phylogenetic analysis and characterize their physiological and pathogenic properties in Russian potato-growing regions.

Results

Analysis identified 21 F. sambucinum and 1 F. venenatum strain within FSAMSC; F. mori, F. noneumartii, F. stercicola, and F. vanettenii within FSSC. FSAMSC strains showed optimal growth at 25°C, while FSSC strains preferred 25-30°C. F. sambucinum uniquely grew at 5°C and was most aggressive at both temperatures; F. noneumartii showed highest aggressiveness among FSSC species.

Conclusion

First records of F. mori on potato and detection of F. noneumartii and F. stercicola in Russia. F. sambucinum’s ability to grow and cause infection at low temperatures gives it competitive advantage during storage. All identified species were pathogenic, with temperature significantly affecting infection development.
  • Published in:Microorganisms,
  • Study Type:Experimental Research Study,
  • Source: PMID: 38543649
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