DTP21 Polypeptide Constructs for Drought Tolerance
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Solution Overview
Problem
Current methods for introducing stress response genes into plants for drought tolerance face challenges such as poor expression due to inappropriate promoter choice and exon-intron structure disruption, requiring extensive experimentation to identify and utilize effective genomic fragments.
Innovation Solution
A recombinant DNA construct is introduced into plants, comprising a polynucleotide operably linked to regulatory elements, encoding a polypeptide with drought tolerance activity, which exhibits increased drought tolerance and yield under water-limiting conditions, utilizing specific nucleotide sequences with high sequence identity or hybridization capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stress response genes are introduced into plants using conventional methods, then drought tolerance is attempted to be achieved, but gene expression is poor due to inappropriate promoter choice and exon-intron structure disruption
Solution Approach 1:
The invention divides the genomic fragment into functional segments: promoter region, exon-intron structures, and coding sequence. By preserving these segmented structures from the native genome rather than using disrupted cDNA, the gene maintains its natural expression patterns and structural integrity, resolving the contradiction between achieving drought tolerance and ensuring proper gene expression.
Solution Approach 2:
The invention copies the complete native genomic structure including promoter, introns, exons, and regulatory elements directly from the donor plant genome into the transgenic plant. This copying of the intact genomic architecture ensures that the stress response gene is expressed properly, eliminating the expression problems caused by using inappropriate promoters or disrupted exon-intron structures.
2Reliability
If extensive experimentation is performed to identify effective genomic fragments, then suitable stress response genes can be found, but the process is time-consuming and complex
Solution Approach 1:
The invention creates a universal screening method that can identify stress response genes across different plant species. By using a standardized approach to clone and screen genomic fragments for drought tolerance phenotypes, the same methodology can be applied to various donors, reducing the need for species-specific experimentation and significantly cutting down the time required to identify effective genes.
Solution Approach 2:
The invention employs a self-service screening approach where the plant itself provides the information needed to identify useful genomic fragments. By screening transgenic plants for drought tolerance phenotypes, the system automatically identifies functional genes without requiring extensive preliminary analysis or expert intervention, thereby reducing experimentation time and complexity.
3Productivity
If genomic fragments are cloned and screened for drought tolerance, then transgenic plants with improved stress response can be produced, but the process requires multiple experimental steps including library construction, transformation, and screening
Solution Approach 1:
The invention merges multiple experimental steps into a streamlined process: genomic DNA is directly cloned into vectors, plants are transformed, and drought tolerance is screened in a single integrated workflow. This merging of functions reduces the number of separate experimental operations required, thereby simplifying the overall process while maintaining high productivity in transgenic plant production.
Data Source
AI summary
Isolated polynucleotides and polypeptides and recombinant DNA constructs useful for conferring drought tolerance, compositions (such as plants or seeds) comprising these recombinant DNA constructs, and methods utilizing these recombinant DNA constructs. The recombinant DNA construct comprises a polynucleotide operably linked to a promoter that is functional in a plant, wherein said polynucleotide encodes a DTP21 polypeptide.