Modified Oleosin Plants Reducing Nitrous Oxide Emissions
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Solution Overview
Problem
Current agricultural practices lead to high nitrous oxide (N2O) emissions due to inefficient nitrogen use and management, with existing Enhanced Efficiency Fertilizers (EEFs) requiring precise application and having limitations in reducing N2O production effectively.
Innovation Solution
Genetically modifying plants to express modified oleosins with artificially introduced cysteine residues and optionally a triacylglycerol (TAG) synthesizing enzyme, which when grown in soil, significantly reduce nitrous oxide production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional N fertilizers are applied to increase crop yields, then plant productivity is improved, but N2O emissions from soil increase significantly
Solution Approach 1:
The patent introduces modified oleosins with artificially introduced cysteine residues that bind to and sequester excess nitrogen in the plant. This converts the harmful effect of excess nitrogen (which would otherwise be released as N2O through denitrification) into a beneficial outcome by retaining it in plant biomass, thereby reducing N2O emissions while maintaining crop yield
Solution Approach 2:
The patent modifies the chemical structure of oleosin proteins by introducing cysteine residues, changing their binding parameters to specifically target and bind nitrogen-containing compounds. This parameter change in the protein structure enables the plant to retain more nitrogen internally, reducing the amount available for microbial denitrification and subsequent N2O production
2Object-generated harmful factors
If Enhanced Efficiency Fertilizers (EEFs) with nitrification inhibitors are used to reduce N2O emissions, then N2O production is reduced by 30-50%, but application complexity and cost increase
Solution Approach 1:
The patent enables the plant itself to serve as the nitrogen management system by expressing modified oleosins that automatically bind and retain excess nitrogen within plant tissues. This self-service mechanism eliminates the need for external chemical inhibitors and complex application systems, as the plant naturally regulates its own nitrogen content through the engineered oleosin proteins
Solution Approach 2:
The modified oleosin acts as an intermediary substance within the plant that mediates nitrogen retention. Instead of applying external chemical inhibitors to the soil, the patent introduces a biological mediator (the modified protein) that performs the nitrogen-sequestering function internally within the plant, simplifying the overall system
3Productivity
If high amounts of N fertilizer are applied to achieve high yields, then crop productivity increases, but nitrogen use efficiency decreases with only 33% recovery
Solution Approach 1:
The patent changes the physiological parameters of nitrogen utilization by introducing modified oleosins that alter how the plant handles excess nitrogen. Instead of the conventional pathway where excess nitrogen is lost through leaching, runoff, or denitrification, the modified oleosins change the retention parameter by binding nitrogen within plant tissues, improving overall nitrogen use efficiency
Data Source
AI summary
The invention provides methods for producing plants that reduce nitrous oxide (N2O) production from the soil in which they are grown. The invention involves expressing modified oleosins with artificially introduced cysteine residues in the plants. The plants optionally also express a triacylglycerol (TAG) synthesising enzyme. The invention also provides methods for reducing nitrous oxide (N2O) production from the soil in which the plants are grown. The invention also includes methods for the production of seed of the plants, and packages and use of such seed.