CRISPR/Cas9 Gene Editing for Plant Drought Tolerance
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Solution Overview
Problem
Current methods for improving drought stress tolerance in plants are limited by the understanding of biochemical and molecular mechanisms, and existing technologies face challenges in effectively enhancing drought tolerance in crops.
Innovation Solution
The development of isolated polynucleotides and recombinant DNA constructs that target specific genes such as PRP1, PP2C64, OPPL1, MFS9, and DN-DSP1, using CRISPR/Cas systems to reduce their expression, thereby enhancing drought tolerance in plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transgenic approaches are used to engineer drought tolerance, then drought tolerance is improved, but device complexity and manufacturing precision are worsened
Solution Approach 1:
The patent extracts and targets specific genes (PRP1, PP2C64, OPPL1, MFS9, DN-DSP1) that negatively affect drought tolerance, using CRISPR/Cas systems to precisely remove or disable their function. This extraction approach allows focused modification of only the problematic genetic elements rather than complex whole-genome engineering.
Solution Approach 2:
The patent replaces traditional mechanical breeding methods and complex transgenic insertion approaches with CRISPR/Cas genome editing technology. This substitution enables more precise, efficient, and controllable genetic modification by using programmable RNA-guided nucleases to directly edit target sequences.
2Reliability
If gene expression is modified to enhance drought tolerance, then drought tolerance and grain yield are improved, but understanding of biochemical and molecular mechanisms is insufficient
Solution Approach 1:
The patent incorporates feedback mechanisms by monitoring gene expression levels and plant physiological responses to drought stress. By measuring changes in drought tolerance and grain yield after CRISPR editing, the system provides information about the functional impact of gene modifications, which can guide further mechanistic studies and optimization.
Solution Approach 2:
The patent performs preliminary identification and targeting of specific genes known to be involved in drought response pathways before conducting the actual CRISPR editing. This preliminary action includes selecting target genes based on existing knowledge of their roles in abiotic stress responses, thereby preparing a focused set of candidates for modification.
3Reliability
If CRISPR/Cas systems are used to reduce gene expression, then drought tolerance is enhanced, but productivity in terms of time and resources is affected
Solution Approach 1:
The CRISPR/Cas system is designed to be self-guiding through the use of programmable guide RNAs that automatically direct the Cas nuclease to the correct target sequences. This self-service capability eliminates the need for complex protein-protein interactions or multiple steps required by traditional gene targeting methods, significantly reducing time and resource requirements.
Solution Approach 2:
The patent utilizes parameter changes in the CRISPR system, such as varying the guide RNA sequences, Cas protein variants, and delivery methods, to optimize the editing efficiency and reduce the time required for generating drought-tolerant plants. By adjusting these parameters, the system achieves faster and more resource-efficient gene modification.
Data Source
AI summary
Isolated polynucleotides and polypeptides, and recombinant DNA constructs, suppression DNA constructs and CRISPR/Cas9 DNA constructs are provided. Compositions (such as plants or seeds) with modified expression or activity of the isolated polypeptides are obtained by transforming the regenerable plant cell with a suppression DNA construct or CRISPR/Cas construct. The plants with improving drought tolerance are obtained by decreasing the expression or activity of the isolated polynucleotide.