Bacillus Microbial Composition for Plant Disease Control
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Solution Overview
Problem
Current chemical treatments for controlling plant diseases, such as fungal, bacterial, and viral pathogens, are costly, lead to the development of resistant strains, and have undesirable environmental impacts, while also affecting beneficial microorganisms and organisms non-targeted by the treatments.
Innovation Solution
A composition comprising biologically pure cultures of Bacillus amyloliquefaciens RTI301 and Bacillus subtilis RTI477, which are applied to plant seeds, roots, or soil to promote plant growth and health, providing antimicrobial properties and enhancing resistance to pathogens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical agents are used to control fungal phytopathogens and bacterial pathogens, then disease control efficacy is improved, but environmental harm increases and beneficial microorganisms are adversely affected
Solution Approach 1:
The patent changes the active ingredient from synthetic chemical agents to biologically derived substances (bacitracin zinc and polymyxin B sulfate from Bacillus bacteria, and copper complexes from fungal metabolites). This parameter change maintains disease control efficacy while reducing environmental harm and non-target effects on beneficial microorganisms.
Solution Approach 2:
The patent uses biodegradable natural products and metabolites that break down quickly in the environment, replacing persistent synthetic chemicals. These biologically derived agents provide short-term disease control without long-term environmental accumulation, allowing the ecosystem to recover rapidly.
2Reliability
If chemical agents are used to treat plant diseases, then pathogen control is improved, but cost increases and resistant strains emerge
Solution Approach 1:
The patent combines multiple biologically derived active ingredients (bacitracin zinc, polymyxin B sulfate, copper complexes) in a single formulation. This composite approach provides broad-spectrum pathogen control against different types of plant diseases while preventing resistance development through multi-target action, reducing the need for multiple separate treatments.
3Reliability
If chemical treatments are applied indiscriminately, then disease control coverage is improved, but beneficial bacteria, fungi, and arthropods are adversely affected
Solution Approach 1:
The patent uses biologically derived agents that exhibit selective toxicity - they target specific pathogen groups (bacteria, fungi) through mechanisms specific to those organisms while leaving beneficial microorganisms and arthropods unaffected. For example, bacitracin and polymyxin specifically target bacterial cell walls, and copper complexes target fungal structures, without harming beneficial soil microbes or pollinators.
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 combination of Bacillus amyloliquefaciens RTI301 and Bacillus subtilis RTI477 effectively benefits plant growth, improves yield, and enhances resistance to pathogens, reducing the need for chemical treatments and minimizing environmental harm.
Implementation Method 1
The combination of Bacillus amyloliquefaciens RTI301 and Bacillus subtilis RTI477 effectively benefits plant growth, improves yield, and enhances resistance to pathogens
Implementation Method 2
Their beneficial plant growth promoting properties include nitrogen fixation, iron chelation, phosphate solubilization
Implementation Method 3
Their beneficial plant growth promoting properties include nitrogen fixation, iron chelation, phosphate solubilization
Implementation Method 4
synthesis of phytohormones such as indole-acetic acid (IAA), acetoin and 2,3-butanediol that stimulate plant growth, development and responses to environmental stresses
Implementation Method 5
Their beneficial plant growth promoting properties include nitrogen fixation, iron chelation, phosphate solubilization
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
Compositions and methods are provided for a combination of a new strain of Bacillus amyloliquefaciens RTI301 and a new strain of Bacillus subtilis RTI477, the combination having growth promoting activity and activity against plant pathogens. The compositions containing the RTI301 and RTI477 strains are useful for benefiting plant growth and/or conferring protection against a pathogenic infection when applied to plant roots, seeds, callus tissue, grafts, and cuttings. Synergistic results are observed for the combination of the strains, and the combination of strains is useful to increase yield in crops including soybean and corn. The compositions containing the combination of strains can be applied alone or in combination with other microbial, biological, or chemical insecticides, fungicides, nematicides, bacteriocides, herbicides, plant extracts, plant growth regulators, and fertilizers.