SwrA Mutant Bacillus Strains for Enhanced Biofilm Formation
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Solution Overview
Problem
Current Bacillus strains used for plant growth promotion and biocontrol have limitations in biofilm formation and swarming ability, which affect their efficacy in enhancing plant health and controlling diseases and pests.
Innovation Solution
Development of Bacillus strains with a mutation in the swrA gene, resulting in impaired swarming ability and enhanced biofilm formation, characterized by sandpaper cell morphology, robust root colonization, and increased spore formation, leading to improved plant health and pest control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If wild type Bacillus strains are used, then swarming ability is maintained, but biofilm formation is reduced
Solution Approach 1:
The patent applies parameter changes by mutating the swrA gene in Bacillus strains to alter the balance between swarming and biofilm formation. The mutation modifies the regulatory parameters of bacterial behavior, shifting the phenotype from high swarming/low biofilm to low swarming/high biofilm, thereby resolving the technical contradiction between these two opposing characteristics.
2Ease of manufacture
If domestic Bacillus strains are used, then ease of laboratory manipulation is improved, but biofilm formation capability is reduced
Solution Approach 1:
The patent restores biofilm formation capability in domestic strains by introducing mutations or introducing wild-type alleles of the swrA gene. This parameter change transforms the strain characteristics while maintaining the ease of laboratory manipulation, thereby resolving the contradiction between ease of manufacture and biofilm formation capability.
3Stability of the object's composition
If swrA mutation is introduced, then biofilm formation is enhanced, but swarming ability is impaired
Solution Approach 1:
The patent deliberately introduces swrA mutations to change the behavioral parameters of Bacillus strains, accepting the trade-off of reduced swarming speed in exchange for significantly enhanced biofilm formation stability. This parameter change strategy resolves the technical contradiction by optimizing for the desired outcome (biofilm formation) while managing the acceptable compromise (swarming ability).
Data Source
AI summary
The present invention relates to novel strains of Bacillus and methods of their use for enhancing the growth, promoting plant health or controlling diseases or pests of a plant.