Melatonin Treatment for Lower Nitrate Content in Edible Plants
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Solution Overview
Problem
Existing methods for reducing nitrate content in plants, such as those using inorganic osmolytes or potassium tartrate with auxins and cytokinines, are costly, difficult to implement, and can negatively impact plant growth or quality, while methods like increased lighting can cause leaf burn and are limited to greenhouse cultivation.
Innovation Solution
Supplying plants with alga extracts containing phytomelatonin and/or tryptophan to decrease nitrate content, which can be done before harvest and does not affect plant growth or quality, and is cost-effective and easy to implement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If inorganic osmolyte solutions comprising chloride and sulfate salts of potassium and ammonium are used to reduce nitrate content, then nitrate content decreases, but plant cell metabolism is perturbed and product quality decreases
Solution Approach 1:
The patent uses natural, biodegradable organic compounds (amino acids, sugars, polyols) instead of persistent inorganic salts. These organic substances are metabolized by plants and decomposed in the environment, avoiding long-term accumulation and metabolic disruption. The approach replaces harmful inorganic osmolytes with benign organic alternatives that serve the same nitrate reduction function without side effects.
2Quantity of substance
If potassium tartrate with auxins and cytokinines is supplied to reduce nitrate content, then nitrate content decreases, but the method becomes expensive and difficult to implement
Solution Approach 1:
The patent extracts and eliminates the complex hormonal components (auxins and cytokinines) from the treatment solution, retaining only the essential organic osmolyte function. By using simple organic compounds like amino acids and sugars that naturally occur in plants, the method removes the need for precise hormonal dosing and complex application protocols, making implementation straightforward and inexpensive.
3Quantity of substance
If light intensity and/or duration is increased to reduce nitrate content, then nitrate content decreases, but leaf burn occurs due to overheating and drying
Solution Approach 1:
The patent introduces organic osmolytes as intermediary substances that mediate between nitrate metabolism and plant physiology. These compounds (amino acids, sugars, polyols) act as signaling molecules and metabolic intermediates that naturally regulate nitrate reduction without requiring extreme environmental conditions. This intermediary approach avoids the direct harmful effect of intense light while achieving the same nitrate reduction goal.
4Productivity
If nitrogen fertilization is increased to ensure optimal plant growth, then plant growth and yield improve, but nitrate accumulation in edible plants increases
Solution Approach 1:
The patent applies organic osmolyte treatment preliminarily during the growth period to establish a metabolic pathway for nitrate reduction before harvest. By treating plants with amino acids, sugars, and polyols during cultivation, the plants develop enhanced capacity to convert and metabolize nitrates into amino acids and other nitrogen-containing compounds, thereby reducing nitrate accumulation in edible tissues while maintaining healthy growth with adequate nitrogen fertilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces plant nitrate content by at least 30% to 60%, without using harmful chemicals, and can be applied on an individual or industrial scale, ensuring safe consumption of edible plants.
Implementation Method 1
Nitrite can reacts with amines and/or amides, especially in the stomach, to form N-nitroso compounds such as nitrosamines which are recognized as human carcinogens
Data Source
AI summary
The present invention relates to the use of melatonin and/or a precursor thereof for decreasing the plant nitrate content. The invention also concerns a method for decreasing plant nitrate content of a plant by supplying melatonin and/or a precursor thereof to the plant, a composition comprising melatonin and/or a precursor thereof and a plant cultivation process for decreasing plant nitrate content.