Archaea Superoxide Reductase for Plant Disease Resistance
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Solution Overview
Problem
Plants and other organisms face insufficient protection against reactive oxygen species (ROS) during environmental stresses, leading to oxidative damage and reduced disease resistance.
Innovation Solution
Introduction of a heterologous polynucleotide encoding superoxide reductase from an archaeon species into plants and other organisms, which is localized to specific cellular compartments, enhancing their ability to manage ROS and increase disease resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If endogenous ROS metabolizing enzymes (superoxide dismutase, catalase, peroxidase) are used to prevent ROS buildup, then oxidative damage is reduced, but protection becomes insufficient under environmental stress conditions
Solution Approach 1:
The patent introduces a heterologous superoxide reductase enzyme from archaea into plants, changing the enzymatic parameter profile by adding a new enzyme type that functions differently from endogenous enzymes. This archaeal SOR operates with different kinetic properties and substrate preferences, providing enhanced ROS metabolism capability under stress conditions where endogenous enzymes become insufficient.
Solution Approach 2:
The introduced superoxide reductase enzyme performs multiple functions: it metabolizes superoxide radicals, protects against oxidative stress, and enhances disease resistance. This multi-functional protein addresses multiple protection needs simultaneously, improving both reliability of ROS metabolism and adaptability to environmental stresses including pathogen attacks.
2Reliability
If heterologous polynucleotide encoding superoxide reductase is introduced into plants, then disease resistance and stress tolerance increase, but transformation complexity is required
Solution Approach 1:
The patent uses a heterologous polynucleotide as an intermediary carrier that delivers the archaeal superoxide reductase gene into plant cells. This nucleic acid intermediary facilitates the transfer of genetic information without requiring direct introduction of the protein itself, simplifying the transformation process while achieving the desired disease resistance and stress tolerance effects.
3Productivity
If superoxide reductase is localized to specific cellular compartments (chloroplast, mitochondria, peroxisome, cell wall), then ROS metabolism efficiency improves, but targeting complexity increases
Solution Approach 1:
The patent applies local quality by directing the superoxide reductase enzyme to specific cellular compartments where ROS metabolism is most needed. Different targeting signals are used to localize the enzyme to chloroplasts, mitochondria, peroxisomes, or cell walls, creating localized high-concentration zones for ROS degradation. This improves overall ROS metabolism efficiency by placing catalytic activity exactly where oxidative stress occurs.
Solution Approach 2:
The patent segments the ROS metabolism function by introducing multiple copies of the superoxide reductase gene, each with different targeting signals for different cellular compartments. This segmentation allows parallel ROS degradation operations in multiple locations simultaneously, improving overall productivity while managing targeting complexity through modular gene construction.
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 introduction of archaeon superoxide reductase increases disease resistance and stress tolerance in transformed plants, reducing disease symptoms and pathogen growth, while also improving yield under stressful conditions.
Implementation Method 1
a heterologous polynucleotide encoding a superoxide reductase from an archaeon species
Implementation Method 2
superoxide reductase... for managing reactive oxygen species (ROS)... reducing disease symptoms and pathogen growth
Data Source
AI summary
This invention provides a stably transformed plant, plant part and/or plant cell, comprising a heterologous polynucleotide encoding a superoxide reductase (SOR) from an archaeon species, wherein said stably transformed plant, plant cell, and/or plant part has increased disease resistance. The invention further provides a method of increasing disease resistance in a plant, plant cell, or plant part, comprising: introducing into said plant, plant cell, or plant part a heterologous polynucleotide encoding a superoxide reductase from an archaeon species to produce a stably transformed plant, plant cell, or plant part, thereby producing a plant, plant part, or plant cell having increased disease resistance as compared to a control. Additionally provided are plants, plant parts, and plant cells produced by the methods of the invention, as well as progeny and products produced therefrom.