Novel Bacteriophage for Specific Xanthomonas Lysis

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Solution Overview

Problem

Current methods for controlling plant diseases caused by Xanthomonas bacteria, such as using copper fungicides or antibiotics, are associated with drug resistance, environmental concerns, and disruptions in bacterial lawn balance, highlighting the need for a more specific and environmentally friendly solution.

Innovation Solution

Development of a bacteriolytic agent composed of a novel bacteriophage with a specific genomic DNA sequence encoding a tail fiber protein, which exhibits high specificity and bacteriolytic ability against Xanthomonas bacteria, thereby targeting and lysing these pathogens without harming plants or animals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If copper fungicides or antibiotics are used to control plant diseases caused by Xanthomonas bacteria, then disease control effectiveness is improved, but drug resistance develops and environmental pollution increases

Engineering Contradiction:

Improvedisease control effectivenessVSAvoiddrug resistance and environmental pollution

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention changes the fundamental parameter of the control agent from chemical substances (copper fungicides, antibiotics) to biological substances (bacteriophages). This parameter change enables specific targeting of Xanthomonas bacteria through phage-bacteria specificity, avoiding the development of drug resistance and environmental pollution associated with chemical and antibiotic treatments.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The bacteriophage preparation utilizes the self-amplification capability of bacteriophages within the target bacterial population. The phages infect Xanthomonas bacteria, replicate using the bacterial translational mechanism, and continuously produce new phage particles that spread and lyse more bacteria, creating a self-sustaining control system without requiring repeated external applications.

Inventive Principle:

Principle #25Self-service

2Reliability

If broad-spectrum antibiotics are used to control plant diseases, then disease control effectiveness is improved, but disruption of bacterial lawn balance occurs

Engineering Contradiction:

Improvedisease control effectivenessVSAvoidbacterial lawn balance

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The invention applies the principle of local quality by using bacteriophages that exhibit highly specific host range, targeting only Xanthomonas bacteria while leaving other beneficial bacteria in the bacterial lawn unaffected. This localized action preserves the overall bacterial ecosystem balance while effectively controlling the specific pathogenic target.

Inventive Principle:

Principle #3Local quality

3Reliability

If conventional phages are used for controlling Xanthomonas bacteria, then bacteriolytic activity is achieved, but host range is extremely narrow

Engineering Contradiction:

Improvebacteriolytic activityVSAvoidhost range

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The invention achieves universality by developing a bacteriophage preparation that can effectively control multiple species within the Xanthomonas genus (including X. oryzae, X. campestris, X. citri, and other pathogenic species) through a single preparation. This multi-functional capability broadens the host range while maintaining high bacteriolytic activity across different Xanthomonas pathogens.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 novel bacteriophage effectively controls plant diseases caused by Xanthomonas bacteria by specifically targeting and lysing these pathogens, reducing the risk of drug resistance and environmental pollution, while being safe for non-target organisms.

Implementation Method 1

Many phages, also called bacteriolytic phages, are specifically attached to target bacteria as a host, then inject their own DNA

Methodology Applied

Scientific EffectViral infection and injection:

Implementation Method 2

are self-amplified utilizing the translational mechanism of the bacteria

Methodology Applied

Scientific EffectSelf-amplification through bacterial translation:

Implementation Method 3

the bacteria are lysed, and consequently, the amplified phages are diffused

Methodology Applied

Scientific EffectBacterial lysis:

Implementation Method 4

the amplified phages are diffused, and an infection into new target bacteria is repeated

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS20250129129A1Bacteriophage having bacteriolysis activity on xanthomonas spp

Publication Date: 2025.04.24 KANEKA CORP

AI summary

To control plant diseases caused by Xanthomonas spp., a novel bacteriophage exhibiting bacteriolysis activity specifically on Xanthomonas spp. was isolated. Thus, developed and provided is a plant disease control composition containing the bacteriophage as an active ingredient. Provided are a bacteriolytic agent containing a bacteriophage that has a novel genomic DNA sequence and exhibits bacteriolysis activity specifically on Xanthomonas spp., and a plant disease control composition containing the same as an active ingredient.