Rice PtrEPSP-TF Gene Mutation for Lignin Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for modifying plant lignin content to reduce cell wall recalcitrance and enhance biofuel production are limited by the complexity of the phenylpropanoid pathway regulation and the need for precise genetic manipulation to alter lignin biosynthesis without affecting other metabolic pathways.
Innovation Solution
Genetically modifying plants by introducing mutations or altering the expression of the PtrEPSP-TF gene or its regulated transcription factors, such as MYB4, MYB58, and SND2, using CRISPR/Cas system or other genome editing methods to reduce lignin content and modulate sugar release, thereby improving biofuel production and nutritional value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional methods are used to modify lignin content, then lignin biosynthesis can be altered, but the complexity of the phenylpropanoid pathway regulation makes precise genetic manipulation difficult and may affect other metabolic pathways
Solution Approach 1:
The patent extracts and targets specific transcription factors (OsMYB46, OsMYB58, OsMYB63, OsMYB42, OsMYB85) that control the phenylpropanoid pathway, rather than attempting to manipulate the entire complex pathway. By focusing on these key regulatory nodes, the invention achieves precise control over lignin biosynthesis while avoiding unintended effects on other metabolic pathways.
Solution Approach 2:
The patent uses transcription factors as intermediary molecules to control lignin biosynthesis. These transcription factors act as mediators between genetic manipulation and the phenylpropanoid pathway, allowing indirect but precise control over lignin content. By modifying the expression of these intermediary transcription factors, the invention achieves controlled alteration of lignin biosynthesis without directly interfering with the complex enzymatic reactions of the pathway.
2Productivity
If lignin content is reduced to enhance biofuel production, then sugar release and biomass conversion efficiency improve, but the structural integrity and stress tolerance of the plant may be compromised
Solution Approach 1:
The patent applies partial action by selectively reducing lignin content through controlled downregulation of specific transcription factors rather than complete elimination. This partial reduction is sufficient to improve sugar release and biomass conversion efficiency while maintaining enough lignin to preserve plant structural integrity and stress tolerance. The invention avoids excessive action that would completely remove lignin and compromise plant viability.
Solution Approach 2:
The patent applies local quality by creating spatial and temporal control over lignin reduction. The modified transcription factors are expressed in specific tissues and at specific developmental stages, allowing lignin content to be reduced in areas where it hinders biofuel production while maintaining adequate lignin levels in structures requiring mechanical strength. This localized modification enables simultaneous improvement of productivity and preservation of reliability.
Data Source
AI summary
The present disclosure provides genetically modified plants, plant cells and plant tissues that show reduced lignin content as compared to a control plant which was not genetically modified. In addition, the disclosure provides methods of regulating lignin content in a plant. The disclosure also provides methods of producing bioproducts using the genetically modified plants of the instant disclosure.