Maize ZmNLP5 Transcription Factor Nitrogen Assimilation
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Solution Overview
Problem
Current maize production heavily relies on nitrogen fertilizers, leading to economic costs and environmental pollution, with limited research on nitrogen use efficiency in maize, particularly regarding the functions of NLP genes.
Innovation Solution
The identification and utilization of the maize NLP transcription factor ZmNLP5, which promotes the expression of nitrogen metabolic key enzyme genes such as ZmNIR1.1, ZmNIR1.2, ZmNR1.1, and ZmNR1.2, enhancing nitrogen assimilation and root elongation in deficient nitrogen conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If excessive nitrogen fertilizers are applied to increase maize yield, then maize production is improved, but economic costs and environmental pollution increase
Solution Approach 1:
The patent utilizes the plant's own NLP transcription factor (ZmNLP5) to regulate nitrogen metabolism internally, enabling the maize plant to efficiently utilize available nitrogen without requiring excessive external fertilizer application. This self-regulating mechanism allows the plant to optimize nitrogen use for growth while reducing dependency on external nitrogen inputs.
Solution Approach 2:
The patent changes the biological parameter of nitrogen assimilation efficiency by introducing or optimizing the ZmNLP5 transcription factor, which enhances the plant's ability to convert nitrogen into usable forms. This parameter change enables improved nitrogen use efficiency, allowing adequate yield with reduced fertilizer application.
2Loss of energy
If nitrogen fertilizers are applied to improve nitrogen assimilation, then nitrogen metabolic efficiency is improved, but economic costs increase
Solution Approach 1:
The maize plant uses its endogenous ZmNLP5 transcription factor to autonomously regulate nitrogen assimilation processes, optimizing the conversion of nitrogen to amino acids and other nitrogenous compounds. This self-service mechanism improves nitrogen assimilation efficiency without requiring increased fertilizer input.
Solution Approach 2:
The ZmNLP5 transcription factor acts as a molecular intermediary that mediates between nitrogen availability and nitrogen assimilation pathways. It regulates the expression of nitrogen metabolic genes, facilitating efficient nitrogen utilization and reducing the quantity of fertilizer needed.
3Loss of energy
If research on NLP genes in maize is expanded to improve nitrogen use efficiency, then nitrogen assimilation is improved, but research complexity increases
Solution Approach 1:
The patent extracts and focuses on a specific NLP transcription factor (ZmNLP5) from the complex family of NLP genes, isolating the key regulatory element responsible for nitrogen assimilation. This extraction approach simplifies research by concentrating on a single critical gene rather than analyzing the entire NLP gene family simultaneously.
Solution Approach 2:
The patent segments the complex nitrogen metabolism regulation system into discrete, studyable components by identifying ZmNLP5 as a key regulatory node. This segmentation allows researchers to study nitrogen use efficiency through a focused lens on one transcription factor and its target genes, reducing overall research complexity.
Data Source
AI summary
The present invention clones a gene ZmNLP5 from maize, which plays an important regulatory role in nitrogen assimilation, and the open reading frame of which has a DNA sequence shown as SEQ ID NO:1. The transcription factor protein encoded by the ZmNLP5 gene has an amino acid sequence shown as SEQ ID NO:2. The uses of the maize NLP transcription factor ZmNLP5 mentioned above in promoting expression of a nitrogen metabolic key enzyme gene ZmNIR1.1, in promoting expression of a nitrogen metabolic key enzyme gene ZmNIR1.2, in promoting expression of a nitrogen metabolic key enzyme gene ZmNR1.1, in promoting expression of a nitrogen metabolic key enzyme gene ZmNR1.2, in improving nitrogen assimilation in maize, and in promoting elongation growth of maize root in deficient nitrogen environment are further provided.