Bacillus amyloliquefaciens Strain PMB05 Induces Plant Immunity
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Solution Overview
Problem
Current biological control methods using Bacillus spp. for plant diseases face challenges such as unstable efficacy and limited disease coverage due to pathogen latency and mutation, and they do not effectively enhance plant growth while minimizing environmental harm.
Innovation Solution
The Bacillus amyloliquefaciens strain PMB05, which induces production of reactive oxygen species (ROS) and callose deposition in plants, thereby enhancing immune responses and promoting plant growth, is used to control a wide range of fungal and bacterial diseases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic chemical compounds are used to control plant diseases, then disease control efficacy is improved, but environmental pollution and harm to non-target organisms increase
Solution Approach 1:
The patent converts the harmful effect of pathogen infection into a beneficial outcome by using the pathogen's own molecular patterns (PAMPs) to trigger and strengthen the plant's immune response. The antagonistic microorganism utilizes PAMP-triggered immunity (PTI) mechanisms to activate defense-related genes and produce protective compounds within the plant, thereby controlling disease while avoiding chemical pesticides.
Solution Approach 2:
The patent introduces an intermediary mechanism (PAMP-triggered immunity) that mediates between the pathogen and the plant defense system. The antagonistic microorganism acts as a mediator that activates the plant's innate immune system through pattern recognition receptors detecting PAMPs, leading to enhanced disease resistance without direct chemical intervention.
2Object-affected harmful factors
If conventional Bacillus spp. are used for biological control, then environmental harm is reduced, but control efficacy becomes unstable and disease coverage is limited
Solution Approach 1:
The patent applies preliminary action by pre-treating plants with antagonistic microorganisms that establish a protective immune response before pathogen infection occurs. The microorganisms activate PTI mechanisms in advance, priming the plant's defense system through ROS production, callose deposition, and induction of defense-related genes, thereby ensuring stable and broad-spectrum disease control.
Solution Approach 2:
The patent utilizes parameter changes in the plant's immune response parameters (ROS levels, callose deposition amount, defense gene expression) to achieve stable and effective disease control. By modulating these physiological parameters through antagonistic microorganism treatment, the system achieves reliable protection across different disease types and environmental conditions.
3Productivity
If chemical fertilizers are used to promote plant growth, then productivity is improved, but pesticide residues and environmental contamination occur
Solution Approach 1:
The patent enables the plant to serve itself by activating its own immune and growth-promoting mechanisms through antagonistic microorganism treatment. The microorganisms induce the plant's endogenous defense and growth systems, eliminating the need for external chemical fertilizers and pesticides while achieving both disease control and growth promotion.
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
Strain PMB05 effectively boosts plant disease resistance by intensifying ROS and callose deposition, providing comprehensive disease control and promoting plant growth, thus addressing the limitations of existing methods.
Implementation Method 1
the process of receptors on plant cell membrane identifying pathogen-associated molecular patterns (PAMPs) and activating defensive responses are called PTI (PAMP triggered immunity)... production of reactive oxygen species (ROS)... The former leads to the programmed death of infected cells, and induce defence-related genes expression
Implementation Method 2
the latter one occurs between plant cell membrane and cell wall, and can strengthen the cell wall to prevent pathogens attack. These two are the important indicator signals of plant immune response
Data Source
AI summary
Provided herein is Bacillus amyloliquefaciens strain PMB05 used in the field of plant disease control. Inoculation of plants with the strain can increase immune responses induced by detection of fungi and/or bacteria in plant, for example, increase the production of ROS and deposition of callose. Also, the strain has the effect of promoting plant growth. Therefore, the strain and its culture filtrate of the present invention can boost plant disease resistance and promote plant growth, which can be extensively used to control plant diseases and have the potential of turning into a commodified biological control agent.