Inclusion of Antifungal and Probiotic Lactiplantibacillus plantarum Strains in Edible Alginate Coating as a Promising Strategy to Produce Probiotic Table Grapes and Exploit Biocontrol Activity
Articolo
Data di Pubblicazione:
2024
Citazione:
Inclusion of Antifungal and Probiotic Lactiplantibacillus plantarum Strains in Edible Alginate Coating as a Promising Strategy to Produce Probiotic Table Grapes and Exploit Biocontrol Activity / N. De Simone, A. Scauro, D. Fatchurrahman, P. Russo, V. Capozzi, G. Spano, M. Fragasso. - In: HORTICULTURAE. - ISSN 2311-7524. - 10:4(2024), pp. 419.1-419.11. [10.3390/horticulturae10040419]
Abstract:
The use of lactic acid bacteria (LAB) for the probiotic enrichment of minimally processed
fruit is a well-established practice in the literature. In addition, several LAB demonstrated a strain-
specific ability to control harmful microorganisms and decay agents, improving shelf life, maintaining
quality, and promoting the safety of fruits and vegetables. Edible coatings can help modulate the
phenomena of gas exchange and water loss by fruits, representing protection from physical damage
and spoilage phenomena linked to oxidation and the development of undesired microorganisms. At
the same time, the coating can represent an innovative delivery matrix for the LAB strains of potential
interest to improve safety and quality in the postharvest management of fruits. In this work, five
Lactiplantibacillus plantarum strains, previously characterised for their probiotic and antifungal activity,
were incorporated into a sodium alginate coating to develop edible probiotic coatings with antifungal
properties for table grapes cv. Italia. The bacterial transfer and their survival were evaluated by
comparing coated and uncoated table grapes during 14 days of cold storage at 4 ◦C. The alginate
edible coating increased the number of viable cells transferred to the surface of the berries from
about 5 to more than 7 Log CFU/g, with a crucial impact on the potential functional attributes of
the final product. The ability of the functionalised coatings to counteract the decay development
was evaluated on table grape berries artificially contaminated with Aspergillus niger CECT 2805. A
significant reduction in lesion diameter was observed in the alginate coating with L. plantarum 11-A,
with a reduction from 15.40 ± 1.14 mm of uncoated berries to 8.40 ± 1.14 mm of berries coated
with L. plantarum 11-A. The lesion diameter reduction was also accompanied by a reduction in the
symptoms of infection, such as browning around the wound. These results suggest the application of
selected strains of L. plantarum as promising bio-resources to enhance the overall value of ready-to-eat
fruits and vegetables, particularly in combination with edible coating as a carrier matrix. While a
strain-dependent effect was not detected with respect to the improvement in the number of cells in
the edible coating, a variability depending on the biotype used was detected for the properties linked
to biocontrol, suggesting that the inclusion in edible packaging may represent an innovative criterion
in the selection of lactobacilli to be applied postharvest.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
antimicrobial; Aspergillus niger; edible coating; fruit; lactic acid bacteria; Lactiplantibacillus plantarum; lactobacilli; postharvest; probiotic; spoilage; table grapes
Elenco autori:
N. De Simone, A. Scauro, D. Fatchurrahman, P. Russo, V. Capozzi, G. Spano, M. Fragasso
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