info:eu-repo/semantics/article
Polyhexamethylene guanidine as a fungicide, disinfectant and wound protector in lemons challenged with Penicillium digitatum
Fecha
2018-12-08Registro en:
Olmedo, Gabriela María; Cerioni, Luciana; Sepulveda, Milena; Ramallo, Jacqueline; Rapisarda, Viviana Andrea; et al.; Polyhexamethylene guanidine as a fungicide, disinfectant and wound protector in lemons challenged with Penicillium digitatum; Academic Press Ltd - Elsevier Science Ltd; Food Microbiology; 76; 8-12-2018; 128-134
0740-0020
CONICET Digital
CONICET
Autor
Olmedo, Gabriela María
Cerioni, Luciana
Sepulveda, Milena
Ramallo, Jacqueline
Rapisarda, Viviana Andrea
Volentini, Sabrina Inès
Resumen
Citrus green mold, a postharvest disease caused by Penicillium digitatum, provokes important economic losses on lemon production. Here, the effectiveness of polyhexamethylene guanidine (PHMG) to inhibit P. digitatum growth and to control green mold on artificially infected lemons was evaluated. At sublethal concentrations, PHMG inhibited conidia germination and infectivity (5 mg L−1), and mycelial growth (50 mg L−1). Viability of conidia was completely suppressed by treatment with 500 mg L−1 PHMG. In this condition, membrane integrity loss, cell wall disruption and ultrastructural alterations were detected, as well as conidia distortion, deformation and collapse. In artificially inoculated lemons, a 30 s-immersion in 500 mg L−1 PHMG completely inhibited green mold. PHMG also exhibited a high disinfectant activity, even in the presence of 1% organic matter, with a better performance than the standard NaClO disinfectant. In addition, 500 mg L−1 PHMG protected wounds against infection. Taken together, our results indicate that PHMG is a promising fungicide for the postharvest control of green mold in lemon packinghouses.