Endophyte Inoculation of Conifer Seedlings for Pest Tolerance
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Solution Overview
Problem
Conifers are vulnerable to pest damage, and existing methods for inoculating them with endophytes to increase pest tolerance are inefficient and difficult to scale up, particularly for commercial production of seedlings.
Innovation Solution
A method for inoculating conifer seedlings with toxigenic endophytes using a susceptible time window, allowing for increased colonization efficiency without wounding, and the use of specific strains such as 05-37A, 06-486D, and 06-485A, which produce toxins toxic to pests like the spruce budworm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conifer seedlings are inoculated with toxigenic endophytes using existing methods, then pest tolerance is increased, but the inoculation process is inefficient and difficult to scale up
Solution Approach 1:
The patent applies preliminary action by identifying and utilizing a susceptible time window in conifer seedling development when the cuticle is not fully formed. By inoculating during this specific early developmental stage, the endophytes can colonize the seedlings efficiently before the protective cuticle develops, thereby resolving the contradiction between achieving reliable pest tolerance and maintaining high inoculation productivity
Solution Approach 2:
The patent changes the temporal parameter of inoculation by targeting a specific susceptible time window rather than using conventional methods at any stage. This parameter change in timing allows for highly efficient colonization without requiring wounding or complex procedures, enabling both high reliability of pest tolerance and high productivity in scaling up inoculation
2Reliability
If conventional inoculation methods are used, then endophytes can be introduced to plants, but the process requires wounding and is difficult to scale for commercial production
Solution Approach 1:
The patent performs preliminary action by inoculating seedlings during the susceptible time window before the cuticle fully develops. This timing strategy eliminates the need for wounding and complex inoculation procedures, making the process simple enough to scale up for commercial seedling production while ensuring reliable endophyte colonization
Solution Approach 2:
The patent applies self-service by utilizing the natural susceptibility of young seedlings during their developmental stage. The seedlings themselves provide the pathway for endophyte entry without requiring external wounding or intervention, simplifying the manufacturing process and enabling easy scaling
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 method enables effective colonization of conifer seedlings with toxigenic endophytes, resulting in increased tolerance to pests and reduced growth rates of herbivorous insects, with persistent toxin production in needles that can last for several years, effectively managing pest populations.
Implementation Method 1
These fungi produce very potent toxins inside the grass leaves that kill insects. An extract of R. parkeri was cytotoxic to HeLa cells and resulted in reduced growth rates and mortalities when incorporated into synthetic diets of Choristoneura fumiferana (spruce budworm)
Implementation Method 2
An endophyte is 'an organism inhabiting plant organs that at some time in its life, can colonize internal plant tissue without causing apparent harm to the host'
Data Source
AI summary
The invention provides methods for preparing a conifer seedling with increased tolerance to a pest. A conifer seedling is inoculated with an isolated endophyte when the conifer seedling is susceptible to colonization by the endophyte.