Hydrocolloid BALO Carriers for Shelf-Stable Soft Rot Control
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Solution Overview
Problem
There is a need for effective encapsulation and delivery systems for viable Bdellovibrio-and-like organisms (BALOs) to prevent bacterial soft rot infections in plant tissues and reduce biofilm formation, requiring long shelf life, controllable release times, and tailored applications.
Innovation Solution
Polysaccharide hydrocolloid-based carriers encapsulate BALOs in a dried gel form, providing high stability and differential release profiles, with carrageenan carriers enabling fast delivery and pectin carriers ensuring sustained release, localized by pectinolytic enzyme degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BALOs are applied as freshly grown cultures, then high predation efficacy is achieved, but shelf life and handling are severely limited
Solution Approach 1:
BALOs are encapsulated in hydrocolloid carriers during a preliminary stage when they are in a dormant or protected state. This preliminary encapsulation action allows the predators to be stored for extended periods and transported to the application site, where they are then activated to exert their predation function. The encapsulation preserves viability during storage and enables on-demand activation at the target location.
2Duration of action of stationary object
If encapsulation carriers are used to extend shelf life, then storage stability is improved, but release control and delivery timing become challenging
Solution Approach 1:
Different hydrocolloid materials with distinct physical and chemical parameters are selected to achieve desired release characteristics. By changing parameters such as polymer type, crosslinking density, mesh size, and degradation rate, the carriers can be tailored to release BALOs at specific times or under specific conditions (e.g., enzymatic degradation, pH changes, moisture exposure), providing controlled delivery while maintaining extended shelf life.
3Quantity of substance
If high cell density is achieved in encapsulated carriers, then application efficiency is improved, but maintaining cell viability during encapsulation and storage becomes difficult
Solution Approach 1:
Hydrocolloid carriers form flexible, semi-permeable matrices that encapsulate BALOs at high densities while allowing sufficient nutrient diffusion and waste removal to maintain cell viability. The hydrocolloid structure provides a protective microenvironment that buffers cells against stress during encapsulation and storage, enabling both high cell density loading and prolonged viability maintenance simultaneously.
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 delivery systems maintain BALO viability and bacteriolytic efficiency for extended periods, effectively reducing bacterial soft rot and biofilm formation in various environments.
Implementation Method 1
Encapsulation is a process of forming a continuous layer entrapping cells and/or compounds within a matrix core
Implementation Method 2
The polysaccharide hydrocolloid is in a wet or dried-gel form, and wherein the carrier preserves viability and bacteriolytic efficiency of the immobilized BALOs
Implementation Method 3
pectin carriers ensuring sustained release, localized by pectinolytic enzyme degradation
Data Source
AI summary
The present invention provides systems for differential delivery of viable BALOs. The systems comprise a carrier comprising a polysaccharide hydrocolloid, and BALOs immobilized within the carrier, wherein the BALOs are present in a physiological state selected from bdelloplasts, bdellocysts, and APs, which are present at a cell density of at least about 1.0×108 PFU/(g carriers), wherein the polysaccharide hydrocolloid is in a wet or dried-gel form, and wherein the carrier preserves viability and bacteriolytic efficiency of the immobilized BALOs. Further provided are methods for the preparation of the systems for differential delivery of viable BALOs, and methods for use thereof, such as for treatment of phytopathogenic bacterial diseases in plants or crop.