Transgenic Plants Overexpressing Ascorbic Acid Genes
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Solution Overview
Problem
Current methods fail to reliably increase plant growth rate and biomass production, as well as enhance stress tolerance, which are crucial for addressing global food supply and renewable energy challenges, particularly in the context of climate change and resource scarcity.
Innovation Solution
Genetically engineering plants to overexpress genes from the ascorbic acid synthesis-cell wall synthesis network, such as myo-inositol oxygenase and glucuronic acid reductase, to enhance growth rate, biomass production, and stress tolerance, including salt tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional breeding and traditional agricultural practices are used, then existing crop varieties maintain stable growth, but plant growth rate and biomass production cannot be reliably increased
Solution Approach 1:
The patent changes the biochemical parameters within the plant by overexpressing specific genes (GMPase, MIOX, GLO) involved in ascorbic acid synthesis. This metabolic parameter change leads to increased ascorbic acid levels, which in turn promotes cell division, elongation, and overall plant growth, reliably increasing both growth rate and biomass production without compromising stability
Solution Approach 2:
The patent uses ascorbic acid (vitamin C) as an intermediary substance that mediates between genetic modification and phenotypic expression. The overexpressed enzymes produce increased ascorbic acid, which acts as a cofactor and antioxidant that facilitates cell wall synthesis, collagen-like protein formation, and stress resistance, thereby translating genetic changes into reliable growth improvements
2Adaptability or versatility
If plants are cultivated in traditional conditions, then standard growth is achieved, but stress tolerance (e.g., salt tolerance) is limited
Solution Approach 1:
The patent implements preliminary action by constitutively overexpressing ascorbic acid synthesis genes in the plant genome before stress exposure. This ensures that high levels of ascorbic acid are always present in the plant, providing preemptive protection against oxidative stress, salt stress, and other environmental challenges before they occur, rather than responding after damage has been inflicted
Solution Approach 2:
The patent converts the harmful effect of stress-induced oxidative damage into a beneficial outcome by using ascorbic acid to scavenge reactive oxygen species (ROS). The ascorbic acid system transforms the harmful oxidative stress that would normally damage cells into a controlled antioxidant defense mechanism, protecting the plant and even promoting growth under stress conditions
3Quantity of substance
If aboveground biomass is increased for food and fuel production, then food supply and renewable energy are improved, but carbon sequestration capacity may be reduced
Solution Approach 1:
The patent applies universality by using a single genetic intervention (overexpression of ascorbic acid synthesis genes) that simultaneously achieves multiple functions: increasing aboveground biomass for food and fuel, enhancing belowground biomass for carbon sequestration, improving stress tolerance, and accelerating growth rate. This multi-functional approach allows the plant to contribute to both food production and carbon capture without trade-offs
Data Source
AI summary
Methods are provided for increasing plant growth rate, biomass and tolerance to stress by genetically engineering plants to contain and express a gene of the ascorbic acid synthesis-cell wall synthesis network (e.g. GlcUA reductase, GLOase or MIOX). Transgenic plants that are genetically engineered in such a manner are also provided.