Researchers Create Biohybrid To Combat Tobacco Crown Rot
A new Bacillus subtilis-based treatment significantly reduces fungal disease and promotes robust tobacco plant development.
Updated on Oct. 21, 2026 in Botany
Scientists have developed a biohybrid treatment using copper-piceatannol-functionalized nanoparticles to address tobacco crown rot. This intervention disrupts the integrity of fungal pathogens like Fusarium oxysporum in soil environments.
Why it matters
Tobacco crown rot is notoriously difficult to manage because the pathogen responsible persists within soil for extended periods. This new method offers a way to improve plant health while suppressing harmful microbial growth.
The treatment uses mesoporous silica nanoparticles immobilized on Bacillus subtilis to target pathogens. This approach increases plant height by 63.5% and root length by 120.7%, while boosting dry biomass by 225.6%.
The players
Bacillus subtilis
This is a gram-positive bacterium commonly found in soil that researchers have used as a biological platform for the new treatment.
Fusarium oxysporum
This is a common soil-borne fungal pathogen responsible for causing crown rot in tobacco plants and other vegetation.
The details
The biohybrid works by leveraging peroxidase-like catalytic activity and cuproptosis-like effects to impair respiratory-chain activity in fungi. By increasing intracellular copper content, the treatment effectively inhibits pathogens such as Candida albicans and drug-resistant bacteria in non-sterile soil.
Timeline
The research detailing the BS@MCP biohybrid was published on October 21, 2026.
The Big Picture
This discovery marks a departure from the historical reliance on chemical fungicides for soil-borne pathogens by introducing a targeted, biological-nanoparticle approach. It shifts the field toward biohybrid systems that combine living microbes with engineered materials to enhance plant immunity.
This development could eventually lead to higher agricultural yields and a reduced reliance on traditional, harsh chemical treatments for crop disease. Such advancements may eventually lower production costs for tobacco growers by limiting the prevalence of soil-borne rot.
The takeaway
The study demonstrates that integrating nanoparticles with beneficial soil bacteria can significantly alter plant growth outcomes. Farmers and researchers should monitor how this method compares to existing integrated pest management systems in diverse soil types.
Further reading
For more on plant science advancements, visit the Botany research section.
Source note: This article includes information reported by Wiley Online Library.
