Ferrous Pyruvate Complexes Stabilize Iron Against Oxidation
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Solution Overview
Problem
Current treatments for iron deficiency in plants and animals are ineffective due to instability of ferrous iron, which oxidizes quickly, and existing antimicrobial agents face challenges with drug-resistant pathogens, requiring novel compositions that maintain ferrous iron in a stable, soluble form to address both plant disorders and microbial infections.
Innovation Solution
Development of ferrous di-pyruvate and tri-ferrous di-citrate complexes that stabilize ferrous ions, allowing them to remain in the ferrous state and form complexes with pyruvate or citrate ions, enabling effective absorption by plants and animals, and acting as Fenton reagents to produce reactive oxygen species for antimicrobial activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ferrous ion is applied to plants, then iron deficiency is treated, but ferrous ion oxidizes quickly to ferric form which is not absorbed by plants
Solution Approach 1:
Pyruvate ions serve as intermediary ligands that coordinate with ferrous ions to form stable complexes. This mediator prevents direct oxidation of ferrous ions by atmospheric oxygen, allowing the iron to remain in the biologically active ferrous state during transport and application to plants.
Solution Approach 2:
The invention creates composite coordination complexes where ferrous ions are bound to pyruvate ligands. This composite structure provides both the necessary iron nutrition and chemical stability, combining the benefits of ferrous ion bioavailability with protection against oxidation.
2Reliability
If soluble iron compounds are applied to alkaline soils, then iron deficiency is treated, but alkaline soil renders applied iron insoluble and unavailable to plants
Solution Approach 1:
Pyruvate acts as a chelating intermediary that binds ferrous ions to form stable, soluble complexes. This chelate structure prevents precipitation in alkaline conditions, maintaining iron solubility and availability even when applied to alkaline soils where conventional iron compounds would become insoluble.
Solution Approach 2:
The invention changes the chemical parameters of iron delivery by using ferrous-pyruvate complexes instead of conventional ferric compounds. This parameter change (oxidation state and ligand type) fundamentally alters the behavior of iron in alkaline soils, preventing insolubility and maintaining bioavailability.
3Reliability
If EDTA-iron chelate is applied, then iron deficiency is treated, but iron is readily converted to insoluble ferric oxides and hydroxides in alkaline soils
Solution Approach 1:
The ferrous-pyruvate complex is designed to be stable during application and transport but can be readily taken up by plants. The complex serves its protective function temporarily during delivery, then releases iron to the plant where it is needed, avoiding the problem of long-term stability that prevents uptake.
Solution Approach 2:
The invention changes the ligand from EDTA to pyruvate, and the iron oxidation state from ferric to ferrous. This parameter change creates a complex that is stable against precipitation but labile enough for plant uptake, resolving the contradiction between stability and reactivity.
4Reliability
If foliar application of ferrous ion is performed, then iron deficiency is treated, but ferrous ion is oxidized to ferric form when exposed to atmosphere
Solution Approach 1:
Pyruvate serves as a protective intermediary during foliar application, forming a stable complex with ferrous ions that prevents atmospheric oxidation. The complex maintains ferrous iron in a protected state during exposure to air, and the plant can still uptake the iron effectively.
5Reliability
If conventional antibiotics are used against drug-resistant pathogens, then microbial infections are treated, but drug resistance limits therapeutic options
Solution Approach 1:
The invention converts the harmful Fenton reaction (which produces toxic hydroxyl radicals that damage DNA and macromolecules) into a beneficial therapeutic mechanism. By delivering ferrous-pyruvate complexes to pathogens, the complex undergoes Fenton chemistry inside the microbial cell, generating cytotoxic radicals that kill the pathogen while the plant or host tissue benefits from iron nutrition.
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
The complexes provide a stable source of ferrous ions for treating iron deficiency and microbial infections, effectively addressing chlorosis in plants and drug-resistant pathogens by maintaining ferrous ions in a soluble, non-oxidized state and generating reactive oxygen species for antimicrobial activity.
Implementation Method 1
complexes comprising a ferrous ion and two pyruvate ions or two citrate ions
Implementation Method 2
acting as Fenton reagents to produce reactive oxygen species for antimicrobial activity
Data Source
AI summary
Provided herein are complexes of ferrous (Fe2+) ion with pyruvate ion and with citrate ion, and methods of making such complexes. The ferrous complexes are useful, inter alia, for providing ferrous iron to plants in a stable form, e.g., for treatment of chlorosis and microbial infections, and for preparation of iron-fortified vegetables as foodstuffs. The ferrous complexes are also useful, inter alia, for providing ferrous iron to humans and other animals in a stable form, e.g., for treatment of iron deficiency, treatment of microbial infections and as topical antiseptics and sterilizing agents. Also provided are complexes of ferric (Fe3+) ion with pyruvate ion, and methods for making such complexes. The ferric complexes are useful, inter alia, for sustained release of ferrous iron to a subject such as a plant or animal.