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The bacterial wilt caused by seriously affects crop yield and safety and is difficult to control. Biological activity-guided screening led to the isolation of 11 phenolic compounds including three undescribed compounds (carnemycin H-I and stromemycin B) from the secondary metabolites of a marine-derived . One new compound is an unusual phenolic dimer. Their structures were elucidated by comprehensive spectroscopic data and -based configurational analysis. The antibacterial activities of the isolated compounds against were evaluated. Compound exhibited excellent inhibitory activity with an MIC value of 3 μg/mL, which was comparable to that of streptomycin sulfate. Additionally, significantly changed the morphology and inhibited the activity of succinate dehydrogenase (SDH) to interfere with the growth of . Molecular docking was conducted to clarify the potential mechanisms of compound with SDH. Further experiments demonstrated that could remarkably inhibit the occurrence of bacterial wilt on tomatoes.
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http://dx.doi.org/10.1021/acs.jafc.3c07826 | DOI Listing |
Pestic Biochem Physiol
November 2025
Department of Biology & CESAM-Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal.
Maize (Zea mays L.) is one of the world's most widely cultivated and economically important cereal crop, serving as a staple food and feed source in over 170 countries. However, its global productivity is threatened by late wilt disease (LWD), a disease caused by Magnaporthiopsis maydis, that spreads through soil and seeds and can cause severe yield losses.
View Article and Find Full Text PDFPlant Biol (Stuttg)
September 2025
Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India.
Conventional methods to combat phytopathogens have ecological implications: chemical fertilizers pollute the environment, while bioinoculants are often inconsistent under field conditions. Microbiome-assisted rhizosphere engineering aims to re-structure the rhizosphere microbiome to promote plant growth and/or mitigate stress. This study employs a strategy based on rhizosphere engineering to combat stress caused by Fusarium udum in Cajanus cajan, by generating synthetic microbial communities (SMCs).
View Article and Find Full Text PDFPest Manag Sci
September 2025
College of Life Science and Agroforestry, Qiqihar University, Qiqihar, China.
Background: Watermelon production is threatened by Fusarium oxysporum f. sp. niveum (Fon) in continuous cropping systems.
View Article and Find Full Text PDFNew Phytol
August 2025
Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602, China.
Plants have developed a complex immune system to detect and respond to invading pathogens. A critical aspect of this defense relies on regulatory mechanisms that control the activation of immune responses, ensuring these are efficient yet do not compromise overall plant performance. Ralstonia solanacearum is a soil-borne bacterial pathogen that causes bacterial wilt disease in many plant species.
View Article and Find Full Text PDFMicrob Ecol
August 2025
Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Key Lab of Organic-Based Fertilizers of China, Jiangsu Collaborative Innovation Center for Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing, 210095, C
The rhizosphere microbiome plays a pivotal role in plant health by mediating interactions between hosts, beneficial microbes, and pathogens. However, the ecological mechanisms underlying microbial consortia that suppress soil-borne diseases remain largely unexplored. In this study, we investigated how the biocontrol bacterium Bacillus velezensis SQR9 influences the assembly of the cucumber rhizosphere bacterial community in the presence of the pathogenic fungus Fusarium oxysporum f.
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