A 2024 Scientific Reports study tested a modular plant-defense design: fuse chitin-binding domains (CBDs) from wheat-germ agglutinin to the plant defensin NaD1 and express the recombinant proteins in transgenic tobacco hairy roots.
CBD fusion increased antifungal activity
NaD1-CBD constructs showed stronger activity against Pyricularia oryzae than NaD1 alone. Increased affinity for chitin-containing fungal walls is a plausible mechanism.
Insect assays also showed enhanced activity, supporting the broader concept of engineering antimicrobial peptides with functional binding domains.
Target specificity and environmental safety were not established
The study did not show that the fusion protein acts only on target pests, has no non-target effects, or remains active for long periods in agricultural environments. Those claims were too strong in the earlier article.
The work is best viewed as a transgenic plant-defense proof of concept, not as a ready-to-spray pesticide product. Crop deployment would require expression stability, non-target, food/feed safety and resistance-evolution studies.
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Reference
- Royan S et al. Expression of a novel NaD1 recombinant antimicrobial peptide enhances antifungal and insecticidal activities. Scientific Reports. 2024;14:23235. https://doi.org/10.1038/s41598-024-73710-3
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