Synergistic Peptide–Chalcone Composition for Lower-Dose Nematode Control
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Solution Overview
Problem
Current nematicides are highly toxic, environmentally harmful, and costly, posing risks to human health and soil microorganisms, while transgenic methods are time-consuming and controversial.
Innovation Solution
A synergistic composition of nematicidal peptides derived from CED-4 protein and chalcone compounds, used at reduced concentrations, effectively killing nematodes without broad-spectrum activity or soil contamination, and is easy to synthesize.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical nematicides are used to kill nematodes, then nematode control effectiveness is improved, but human health safety and environmental safety deteriorate
Solution Approach 1:
The invention changes the chemical parameters by using naturally occurring compounds (peptides from CED-4 protein and chalcones) instead of synthetic toxic chemicals. This parameter change maintains nematocidal activity while eliminating the harmful effects associated with conventional chemical nematicides.
Solution Approach 2:
The invention uses biodegradable peptide and chalcone compounds that break down naturally in the environment, replacing persistent toxic chemicals. These natural compounds provide the necessary nematicidal action without long-term environmental contamination.
2Reliability
If conventional chemical nematicides are used, then nematode mortality is improved, but soil microorganism safety deteriorates
Solution Approach 1:
The invention achieves selective toxicity by designing compounds that specifically target nematodes while being safe for soil microorganisms. The peptides and chalcones exhibit localized action against nematodes without affecting beneficial soil flora, demonstrating different quality effects on different organisms.
3Duration of action of stationary object
If transgenic plant lines are developed for nematode resistance, then long-term plant protection is improved, but development time and cost increase
Solution Approach 1:
Instead of modifying the plant genome over long periods, the invention extracts and applies the protective function externally by using peptide-chalcone compositions. This separates the protection mechanism from the plant itself, allowing immediate application without lengthy breeding programs.
Solution Approach 2:
The invention provides preliminary protection by applying the peptide-chalcone composition before nematode infection occurs, eliminating the need for long-term transgenic development. The protective action is prepared in advance and can be applied directly to crops.
4Reliability
If transgenic plant lines are developed for nematode resistance, then plant protection effectiveness is improved, but production cost increases
Solution Approach 1:
The invention uses inexpensive, naturally occurring peptide and chalcone compounds that can be produced through simple fermentation or chemical synthesis, replacing costly transgenic development and registration processes. These compounds provide effective protection without the high overhead of genetic modification programs.
5Reliability
If high concentrations of single nematicide are used, then nematode control effectiveness is improved, but environmental contamination and toxicity increase
Solution Approach 1:
The invention merges two different natural compounds (peptides from CED-4 protein and chalcones) into a synergistic composition. This combination achieves enhanced nematicidal activity at lower concentrations, reducing environmental contamination while maintaining or improving control effectiveness.
Solution Approach 2:
The invention creates a composite nematicidal system combining peptides and chalcones, where the synergistic interaction between the two components provides superior efficacy at reduced dosages, minimizing environmental impact compared to single high-concentration treatments.
Data Source
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AI summary
The present invention provides a synergistic composition of a nematicide comprising of a nematicidal peptide, and chalcones, wherein the nematicidal peptide is derived from CED-4 protein sequence is either, Peptide 2, or Peptide 3, or Peptide 12; and chalcones are either chalcone 17, chalcone 25, or chalcone 30. The nematicidal peptides alone show 100 % nematicidal activity at a concentration of 1 mg/ml, whereas, when combined with chalcones, 100 % nematicidal activity is seen at concentration as low as 0.8 mg/ml binging a synergistic effect. Another embodiment of the invention provides a method for preparing working solutions of chalcones in aqueous solvents such as water by diluting the stock solution of chalcones, prepared in dimethyl sulfoxide, serially in ethanol and water. The final concentration of chalcone is around 10-4 -10-5 M in the nematicidal composition. This synergistic nematicidal composition is environmentally safe and non-toxic to humans and animals.