Bacillus Lipopeptide Formulations with Surfactants for Enhanced Bioavailability
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Solution Overview
Problem
Current formulations of lipopeptide-producing strains of Bacillus subtilis and Bacillus amyloliquefaciens have limited antifungal activity due to bioavailability issues, and there is a need for improved fungicidal formulations that are not susceptible to fungal resistance.
Innovation Solution
Development of enhanced formulations combining a lipopeptide-producing strain of Bacillus subtilis or Bacillus amyloliquefaciens with specific compounds, such as lauryl ether sulfate or 3,6-dioxaoctadecylsulfate, in synergistically effective amounts to enhance antifungal activity and bioavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lipopeptide-producing strains of Bacillus subtilis or Bacillus amyloliquefaciens are used for fungal control, then antifungal activity is provided, but bioavailability is limited due to hydrophobic nature
Solution Approach 1:
The patent introduces surfactants as intermediary substances that mediate between the hydrophobic lipopeptides and the aqueous environment. These surfactants form micellar structures that solubilize the lipopeptides, enhancing their bioavailability without compromising their antifungal activity. The surfactant acts as a bridge allowing the hydrophobic compound to function effectively in a hydrophilic medium.
Solution Approach 2:
The patent modifies the physical-chemical parameters of the lipopeptide formulation by adjusting pH, ionic strength, and temperature conditions to optimize solubility and stability. Additionally, the patent changes the molecular structure parameters by combining lipopeptides with surfactants of specific HLB values to achieve optimal bioavailability while maintaining antifungal efficacy.
2Reliability
If conventional fungicides are used for crop protection, then fungal diseases are controlled, but fungal resistance develops
Solution Approach 1:
The patent replaces conventional chemical fungicides that target specific molecular pathways with lipopeptides that exert mechanical/physical disruption on fungal cell membranes. The lipopeptides insert into and disrupt the lipid bilayer structure, causing cell lysis. This physical mode of action is difficult for fungi to resist through genetic mutations, as it does not rely on specific protein targets that can be mutated.
Solution Approach 2:
The patent creates composite formulations combining lipopeptides with surfactants and other adjuvants to enhance efficacy and prevent resistance. The synergistic interaction between multiple components creates a multi-faceted attack on fungal pathogens, making it harder for resistance to develop compared to single-mode-of-action fungicides.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The synergistic combinations significantly improve antifungal activity, providing effective control of fungal and bacterial diseases in plants, with enhanced bioavailability and resistance to fungal resistance development.
Implementation Method 1
Lipopeptides kill fungi by disrupting cell membranes
Implementation Method 2
Due to their hydrophobic nature, the lipopeptides produced by Bacillus subtilis and Bacillus amyloliquefaciens may have limited bioavailability when applied to plants, plant parts, or soil. Compounds that enhance the bioavailability of these lipopeptides could increase their antifungal activity.
Data Source
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AI summary
The present invention provides a fungicidal composition comprising a strain of Bacillus subtilis or Bacillus amyloliquefaciens and one of several compounds in a synergistically effective amount. Also provided are methods of controlling fungal harmful organisms and/or bacterial harmful organisms in a plant, the method comprising applying an effective amount of a fungicidal composition to the plant, to a part of the plant and/or to a locus on which the plant or plant part grows.