ジャガイモ病原菌に対する生物防除剤としてのクォーラムセンシング阻害耐塩性細菌
Patricia Sánchez1, Ana Monzón-Ramos1, Inmaculada Sampedro1,2
1Department of Microbiology, Faculty of Pharmacy, University of Granada, Granada, Spain.
Scientific reports
|December 30, 2025
まとめ
2つの耐塩性細菌株、Pseudomonas kilonensis B34およびPsychrobacter sp. B38は、ジャガイモ病原菌によって引き起こされるジャガイモ疾患の制御において可能性を示しています。これらの株は、組織損傷を軽減し、抗酸化防御を高め、化学的治療法に代わる持続可能な代替手段を提供します。
科学分野:
- Agricultural Science
- Microbiology
- Plant Pathology
背景:
- Potato crops are vulnerable to bacterial diseases caused by phytopathogens like Dickeya solani, Pectobacterium atrosepticum, and P. carotovorum.
- These pathogens induce oxidative stress, necrosis, and reduce postharvest quality in potato tubers.
- Bacterial virulence is often regulated by quorum sensing (QS) through N-acyl homoserine lactones (AHLs), making AHL degradation (quorum quenching - QQ) a potential biocontrol strategy.
研究 の 目的:
- To evaluate the biocontrol efficacy of two halotolerant bacterial strains, Pseudomonas kilonensis B34 and Psychrobacter sp. B38, against potato phytopathogens.
- To assess the impact of these strains on potato tissue integrity and antioxidant responses under pathogen stress.
- To explore the potential of these QQ bacteria as sustainable alternatives to chemical treatments in agriculture.
主な方法:
- Isolation and characterization of halotolerant bacterial strains with AHL-degrading capabilities.
- In vitro and in vivo co-culture experiments with potato tubers and key phytopathogens (D. solani, P. atrosepticum, P. carotovorum).
- Assessment of tissue maceration, antioxidant enzyme activity, and phenolic compound levels in potato tissues.
主要な成果:
- Co-culturing with P. kilonensis B34 and Psychrobacter sp. B38 significantly reduced potato tissue maceration, particularly against D. solani.
- Both bacterial strains enhanced antioxidant defense mechanisms in potato tissues under biotic stress.
- Strain B38 showed the highest effectiveness in boosting antioxidant responses and increasing phenolic compounds, preserving tissue integrity.
結論:
- Halotolerant bacterial strains Pseudomonas kilonensis B34 and Psychrobacter sp. B38 exhibit significant biocontrol potential against potato bacterial diseases.
- These QQ strains effectively mitigate pathogen-induced tissue damage and enhance the plant's natural antioxidant defenses.
- The study supports the use of halotolerant QQ bacteria as environmentally friendly and sustainable alternatives for managing potato diseases.
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