JAZ CDK8 Mutations for Pest Resistance and Seed Yield
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Solution Overview
Problem
Current methods for controlling insect pests in crops, such as using insecticides, face challenges like high costs, environmental impact, and emerging resistance, while also posing a dilemma between high yield and plant immunity, especially in field-grown and greenhouse-grown crops.
Innovation Solution
Development of plants with loss-of-function mutations in JAZ genes and CYCLIN-DEPENDENT KINASE 8 (CDK8) to enhance pest and biotic stress resistance without compromising growth or reproductive output, specifically using jazD mutations combined with CDK8 loss-of-function mutations to achieve improved seed yields and growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If JAZ expression is reduced to enhance pest resistance, then biotic stress resistance is improved, but plant growth and seed production are compromised
Solution Approach 1:
The patent introduces CDK8 as an intermediary component that mediates between JAZ repressor activity and growth promotion. By targeting CDK8 (either through inhibition or genetic modification), the system achieves enhanced pest resistance through reduced JAZ activity while simultaneously promoting growth by interfering with CDK8's growth-suppressing function. This intermediary mechanism resolves the contradiction by adding a third element that balances the opposing effects.
2Object-affected harmful factors
If insecticides are applied to control insect pests, then pest damage is reduced, but environmental impact increases and resistance develops
Solution Approach 1:
The patent enables plants to defend themselves against insect pests through genetic modification of their own defense pathways (JAZ and CDK8 genes). The modified plants constitutively express enhanced defense mechanisms, producing natural anti-pest compounds and responses without requiring external insecticide applications. This self-service approach eliminates environmental contamination while maintaining effective pest control.
3Reliability
If JAZ expression is reduced to enhance pest resistance, then biotic stress resistance is improved, but plant growth is reduced
Solution Approach 1:
CDK8 serves as the intermediary target that connects JAZ repressor activity to growth outcomes. The patent utilizes CDK8 inhibition or modification to decouple the growth-suppressing effect of reduced JAZ activity from the pest resistance benefit. By specifically targeting CDK8, the system allows JAZ reduction to enhance defense while simultaneously promoting growth through CDK8 interference, thus resolving the stature contradiction.
Data Source
AI summary
Described herein are modified plants, plant cells, and plant seeds that have at least one mutant loss-of-function JAZ gene and at least one loss-of-function cdk8 gene. Such plants are highly resistant to pests and environmental stress and have restored growth and increased seed yield compared to plant lines with a jazD genetic background.