Gamma irradiation can control the number of psychotrophic bacteria in Agaricus bisporus during storage


Autoria(s): Andrade, Meire Cristina Nogueira de; Jesus, João Paulo Furlan de; Vieira, Fabrício Rocha; Viana, Sthefany Rodrigues Fernandes; Spoto, Marta Helena Fillet; Minhoni, Marli Teixeira de Almeida
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

01/04/2016

01/04/2016

2013

Resumo

We evaluated the effect of gamma irradiation doses (0, 125, 250, and 500 Gy) in control of psychrotrophic bacteria in different strains of Agaricus bisporus (ABI-07/06, ABI-05/03, and PB-1) during storage, cultivated in composts based on oat straw (Avena sativa) and Brachiaria spp. The experimental design was completely randomized in a factorial scheme 4  2  3 (irradiation doses  composts  strains), with 24 treatments, each consisting of 2 replicates, totaling 48 experimental units (samples of mushrooms). The mushrooms collected from all culture conditions were packaged in plastic polypropylene with 200 g each and subjected to Cobalt-60 irradiator, type Gammacell 220, and dose rate 0.740 kGy h–1 , according to the treatments. Subsequently, the control (nonirradiated) and other treatments were maintained at 4 ± 1°C and 90% relative humidity (RH) in a climatic chamber to perform the microbiological analysis of mushrooms on the 1st and 14th day of storage. According to the results, it was found that the highest mean colony psychotrophic count, after 14 days of storage, was observed in strain ABI-07/06 1.30 × 108 g -1 most probable number (MPN) in nonirradiated mushrooms, coming from Brachiaria grass-based compost, and this same strain under the same storage conditions, coming from the same type of compost that underwent a dose of 500 Gy, obtained a significant reduction in mean colonies of psychrotrophic bacteria (2.25 × 104 g –1 MPN). Thus, the irradiation doses tested favored reducing the number of colonies of psychrotrophic bacteria, regardless of the type of compound and strain of A. bisporus.

Formato

1623-1628

Identificador

http://dx.doi.org/10.5897/AJAR12.2021

African Journal of Agricultural Research, v. 8, n. 17, p. 1623-1628, 2013.

1991-637X

http://hdl.handle.net/11449/137565

10.5897/AJAR12.2021

ISSN1991-637X-2013-08-17-1623-1628.pdf

2937965588168988

Idioma(s)

eng

Relação

African Journal of Agricultural Research

Direitos

openAccess

Palavras-Chave #Champignon #Shelf life #Postharvest #Mushrooms
Tipo

info:eu-repo/semantics/article