Interfering HD-Zip Transcription Factor Repression for Enhanced Crop Yield
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Solution Overview
Problem
Current methods for improving plant growth and development through genetic modification have been limited by the unclear role of HD-Zip class II transcription factors, which repress gene expression, hindering efforts to enhance agronomic traits in crops.
Innovation Solution
Development of recombinant DNA constructs that interfere with the ability of endogenous HD-Zip class II transcription factors to repress gene expression by producing proteins or RNA molecules that suppress or mutate these factors, leading to enhanced traits such as increased ear biomass and yield in corn plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transgenic manipulation is used to interfere with HD-Zip class II transcription factor repression, then agronomic traits are enhanced, but the complexity of genetic modification increases
Solution Approach 1:
The patent uses heterologous HD-Zip class II transcription factors as intermediary molecules to interfere with the repression activity of endogenous HD-Zip class II factors. These heterologous proteins act as mediators that bind to DNA regulatory elements and prevent the endogenous repressors from functioning, thereby enhancing gene expression and improving agronomic traits without directly modifying the endogenous genes themselves.
Solution Approach 2:
The patent employs copying by introducing heterologous HD-Zip class II transcription factor genes from different plant species into the target plant. These copied genes produce proteins that functionally interfere with the endogenous HD-Zip class II factors, allowing enhancement of agronomic traits through transgenic manipulation rather than direct genetic modification of the original genes.
2Reliability
If heterologous HD-Zip class II transcription factors are introduced to interfere with endogenous factors, then gene expression repression is reduced, but the device complexity increases
Solution Approach 1:
The patent exploits the universality of the HD-Zip class II transcription factor family across different plant species. Heterologous HD-Zip class II factors from one species can functionally interfere with endogenous factors from another species, as they share conserved DNA-binding domains and repression mechanisms. This multi-functionality allows a single transgenic construct to interfere with multiple endogenous HD-Zip class II factors, reducing the need for multiple separate genetic modifications.
Data Source
AI summary
A recombinant DNA construct is disclosed. When the recombinant DNA construct is expressed in a plant or a plant cell, endogenous HD-Zip class II proteins become less able to repress DNA transcription of the genes they typically regulate. The recombinant DNA construct can be expressed in plant cells to produce plants with enhanced phenotypes. Methods of making transgenic plants comprising the recombinant DNA construct, and plants produced thereby are also disclosed.