Streptomyces Seed Coating for Biological Control of Phytopathogens

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Solution Overview

Problem

There is a need for alternative microorganisms with antibacterial and antifungal activity suitable for seed coating to control plant diseases caused by phytopathogens, particularly fungi, as synthetic phytopharmaceutical drugs are being phased out due to environmental and health concerns, and existing microbial agents are not specifically indicated for seed coating.

Innovation Solution

The use of Streptomyces venezuelae DSM 33887 strain as a phytopharmaceutical drug for seed coating, which exhibits bio-control activity against a wide range of phytopathogens through direct antagonism, nutrient competition, and production of secondary metabolites, and stimulates plant immune defenses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If synthetic phytopharmaceutical drugs are used to control plant diseases, then disease control effectiveness is improved, but environmental harm and health safety worsen

Engineering Contradiction:

Improvedisease control effectivenessVSAvoidenvironmental harm and health safety

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameter from synthetic phytopharmaceutical drugs to microbial agents (Bacillus and Streptomyces species), fundamentally altering the active substance while maintaining disease control functionality and eliminating environmental and health hazards associated with synthetic chemicals

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs microbial agents that can be easily applied and decompose naturally in the environment, replacing persistent synthetic chemicals with biodegradable biological products that complete their function and disappear without leaving harmful residues

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If existing microbial agents are used for plant disease control, then environmental safety is improved, but applicability to seed coating worsens

Engineering Contradiction:

Improveenvironmental safetyVSAvoidapplicability to seed coating

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent identifies and selects microbial strains (Bacillus amyloliquefaciens and Streptomyces venezuelae) that possess multi-functional capabilities: they provide disease control, are tolerant of seed coating conditions, and can effectively colonize seed surfaces, thereby achieving universal applicability across different agricultural uses

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent specifically selects and characterizes microbial strains with localized adaptability to seed coating conditions, identifying strains that possess specific traits (spore formation, stress tolerance, adhesion) enabling them to survive and function effectively in the unique environment of treated seeds

Inventive Principle:

Principle #3Local quality

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

Streptomyces venezuelae DSM 33887 strain effectively controls phytopathogens, enhances seed germination, and promotes plant growth by colonizing plant tissues, thereby reducing disease severity and increasing crop yields.

Implementation Method 1

the production of secondary metabolites with toxic and inhibitory activity against the phytopathogens (antibiosis)

Methodology Applied

Scientific EffectAntibiosis:

Implementation Method 2

the competition for the nutrients required for the pathogen development

Methodology Applied

Scientific EffectNutrient competition:

Implementation Method 3

the use of at least one Streptomyces venezuelae strain... to trigger the plant immune defenses

Methodology Applied

Scientific EffectImmune stimulation:

Data Source

PatentUS20250359555A1Streptomyces venezuelae for the biological control of plant diseases

Publication Date: 2025.11.27 CORA SEEDS SRL

AI summary

The present invention relates to the use of at least one Streptomyces venezuelae strain, in particular the Streptomyces venezuelae DSM 33887 strain, as a phytopharmaceutical drug, in particular as a fungicide or bio-fungicide. A further object of the invention is a Streptomyces venezuelae strain referred to as DSM 33887, and compositions and uses thereof. The present invention relates to a method for the control of phytopathogens and a method to prevent, control, and treat plant diseases caused by phytopathogens, comprising the use of a Streptomyces venezuelae strain, preferably the DSM 33887 strain.