Transgenic Plants with Altered Nitrogen Metabolism for Yield Maintenance
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Solution Overview
Problem
Current plant breeding techniques lack effective methods to enhance nitrogen use efficiency and drought tolerance, leading to reduced crop productivity due to abiotic stresses such as nitrogen deficiency and drought, which account for significant agricultural losses worldwide.
Innovation Solution
The development of recombinant DNA constructs containing specific polynucleotides and polypeptides, such as OsDN-PPR1, OsLRP1, OsDN-LTP1, and OsRRM1, which are over-expressed in plants to improve nitrogen stress tolerance and drought tolerance, utilizing regulatory sequences to enhance gene expression and agronomic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If nitrogen fertilizer is reduced to avoid pollution and maintain profit margin, then environmental pollution and cost are reduced, but plant growth and yield are compromised due to nitrogen deficiency
Solution Approach 1:
The patent changes the physiological parameters of the plant by introducing transgenes that alter nitrogen metabolism and stress response. The transgenic plants exhibit modified gene expression patterns, enhanced nitrogen use efficiency, and improved drought tolerance, allowing them to maintain yield under reduced nitrogen fertilizer conditions.
Solution Approach 2:
The patent uses transgenic DNA constructs as intermediaries to transfer beneficial traits from model organisms to crops. The recombinant DNA molecules carrying genes for nitrogen stress tolerance and drought resistance serve as mediators to improve plant performance without requiring increased nitrogen fertilizer input.
2Productivity
If conventional plant breeding techniques are used, then existing crop varieties are maintained, but nitrogen use efficiency and drought tolerance cannot be effectively enhanced
Solution Approach 1:
The patent replaces conventional mechanical breeding methods with molecular biology techniques. Instead of using traditional cross-breeding and selection processes, the invention employs recombinant DNA technology, gene cloning, and transgenic transformation to directly introduce and express beneficial genes in plants, achieving superior nitrogen use efficiency and drought tolerance.
3Quantity of substance
If plants are grown under nitrogen limiting conditions, then fertilizer cost is reduced, but growth and development are adversely affected
Solution Approach 1:
The transgenic plants exhibit enhanced self-regulation of nitrogen metabolism and stress response. The introduced genes enable the plants to autonomously optimize nitrogen utilization, activate stress tolerance mechanisms, and maintain growth under nitrogen-limiting conditions without external intervention or additional fertilizer input.
Data Source
AI summary
Isolated polynucleotides and polypeptides, and recombinant DNA constructs useful for conferring improved nitrogen use efficiency and/or drought stress tolerance; compositions (such as plants or seeds) comprising these recombinant DNA constructs; and methods utilizing these recombinant DNA constructs are disclosed. The recombinant DNA constructs comprise a polynucleotide operably linked to a promoter that is functional in a plant, wherein said polynucleotides encode abiotic stress tolerance polypeptides.