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Murrayone: A Promising New Fungicide Destroying the Oxidative Homeostasis and Cell Membrane Integrity of Botrytis
Wanyun Zhu1,2, Yao Yu1,2, Xinru Li1,2,3
1Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
Abstract:
Botrytis cinerea is a widely destructive plant pathogen, causing substantial economic losses worldwide. Our previous research showed that the natural product Murrayone had a potent antifungal effect on B. cinerea. In this study, we investigated the mechanism of antifungal activity of Murrayone against B. cinerea. Treatment with Murrayone caused severe cellular morphological damage, significantly inhibited sporulation and spore germination, reduced disease severity in blueberry fruits, and demonstrated its safety in seed germination assays. Transcriptome analysis revealed that its mechanism involves the disruption of oxidative homeostasis and damage to the cell membrane. The multitarget and multipathway antifungal effects of Murrayone were preliminarily verified by assessing reactive oxygen species (ROS) accumulation, propidium iodide (PI) staining, and mycelial dry weight. This study demonstrates the potential of Murrayone as an antifungal agent and elucidates its mode of action, providing a theoretical foundation for further exploration of Murrayone as a sustainable antifungal strategy.
Insights
Murrayone effectively combats the destructive plant pathogen Botrytis cinerea by damaging cell membranes and disrupting oxidative balance. This natural compound shows promise as a safe and sustainable antifungal agent for agriculture.
Area of Science:
- Agricultural Science
- Plant Pathology
- Mycology
Background:
- Botrytis cinerea causes significant global economic losses in agriculture.
- Previous studies identified Murrayone as a potent natural antifungal agent against B. cinerea.
Purpose of the Study:
- To investigate the mechanism of action of Murrayone against B. cinerea.
- To evaluate the safety and efficacy of Murrayone as a sustainable antifungal strategy.
Main Methods:
- Cellular morphology, sporulation, and spore germination assays were performed.
- Transcriptome analysis was used to identify molecular pathways affected by Murrayone.
- Reactive oxygen species (ROS) accumulation, propidium iodide (PI) staining, and mycelial dry weight were assessed.
Main Results:
- Murrayone induced severe cellular damage, inhibited sporulation and germination, and reduced disease severity in blueberries.
- Transcriptome analysis indicated disruption of oxidative homeostasis and cell membrane damage.
- Murrayone demonstrated safety in seed germination assays.
Conclusions:
- Murrayone exhibits multitarget and multipathway antifungal effects against B. cinerea.
- The findings provide a theoretical basis for developing Murrayone as a sustainable agricultural antifungal agent.
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