Sodium Alginate–Based Coatings Safeguard Garlic Cloves and Provide Controlled Biostimulant Delivery to Improve Agronomic Performance
5 affiliations
- 1Universidade Federal de Santa Catarina - Campus Curitibanos , , , ,
- 2Universidade Federal de Santa Catarina − Campus Blumenau , , , ,
- 3Universidade Federal de Santa Catarina , , , ,
- 4Universidade do Estado de Santa Catarina - Centro de Ciências Tecnológicas , , , ,
- 5Universidade Federal de Santa Catarina − CampusCuritibanos - Centro de Ciências Rurais , , , ,
Abstract
The application of biopolymers derived from natural sources as agricultural coating materials represents a promising strategy for improving propagation efficiency and seedling establishment. This approach can enhance moisture retention and mechanical protection while enabling the controlled release of bioactive compounds, such as biostimulants. The present study evaluated a sodium alginate–based polymeric matrix and its corresponding films, with and without the incorporation of tryptophol, for coating garlic cloves belonging to two distinct vigor classes. Physicochemical analyses revealed a predominance of mannuronic acid over guluronic acid in the polymeric matrix, suggesting that its structural characteristics may contribute to the protective properties of the coating. Furthermore, the incorporation of tryptophol, a biostimulatory compound, significantly influenced the physicochemical properties of the alginate films, particularly their water absorption and swelling behavior. Bioassays conducted with garlic propagules demonstrated that small cloves treated with the biopolymer–biostimulant combination exhibited reduced activation of oxidative defense mechanisms, whereas large cloves subjected to the same treatment showed improved yield and quality. Both vigor classes exhibited a lower incidence of physiological disorders following treatment with either the biopolymer–biostimulant combination or the biostimulant alone. Overall, this biotechnology-based approach is innovative, cost-effective, and readily adaptable to agricultural applications, offering a sustainable strategy for improving crop establishment and productivity.
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BibTeX
@article{macedo2026sodium,
title = {{Sodium Alginate–Based Coatings Safeguard Garlic Cloves and Provide Controlled Biostimulant Delivery to Improve Agronomic Performance}},
author = {Willian Rodrigues Macedo and Larissa N. Carli and Pâmela R. Oliveira and Rogério A. Gariani and Nelson L. Junior and Janaina Viliczinski and Jaqueline Viliczinski},
journal = {ACS Omega},
year = {2026},
month = nov,
doi = {10.1021/acsomega.6c08203},
url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08203/5465111/Sodium-Alginate-Based-Coatings-Safeguard-Garlic},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Sodium Alginate–Based Coatings Safeguard Garlic Cloves and Provide Controlled Biostimulant Delivery to Improve Agronomic Performance
AU - Willian Rodrigues Macedo
AU - Larissa N. Carli
AU - Pâmela R. Oliveira
AU - Rogério A. Gariani
AU - Nelson L. Junior
AU - Janaina Viliczinski
AU - Jaqueline Viliczinski
PY - 2026
DA - 2026/11/05
JO - ACS Omega
DO - 10.1021/acsomega.6c08203
UR - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08203/5465111/Sodium-Alginate-Based-Coatings-Safeguard-Garlic
AB - The application of biopolymers derived from natural sources as agricultural coating materials represents a promising strategy for improving propagation efficiency and seedling establishment. This approach can enhance moisture retention and mechanical protection while enabling the controlled release of bioactive compounds, such as biostimulants. The present study evaluated a sodium alginate–based polymeric matrix and its corresponding films, with and without the incorporation of tryptophol, for coating garlic cloves belonging to two distinct vigor classes. Physicochemical analyses revealed a predominance of mannuronic acid over guluronic acid in the polymeric matrix, suggesting that its structural characteristics may contribute to the protective properties of the coating. Furthermore, the incorporation of tryptophol, a biostimulatory compound, significantly influenced the physicochemical properties of the alginate films, particularly their water absorption and swelling behavior. Bioassays conducted with garlic propagules demonstrated that small cloves treated with the biopolymer–biostimulant combination exhibited reduced activation of oxidative defense mechanisms, whereas large cloves subjected to the same treatment showed improved yield and quality. Both vigor classes exhibited a lower incidence of physiological disorders following treatment with either the biopolymer–biostimulant combination or the biostimulant alone. Overall, this biotechnology-based approach is innovative, cost-effective, and readily adaptable to agricultural applications, offering a sustainable strategy for improving crop establishment and productivity.
SN - 2470-1343
ER -