Aislamiento y caracterización de cepas halófilas de charque

Autores/as

DOI:

https://doi.org/10.33448/rsd-v11i3.26368

Palabras clave:

Bacteria; Archaea; Características fisiológicas.

Resumen

El charque es un producto alimenticio típicamente brasileño que consiste en agregar sal (cloruro de sodio - NaCl) a la carne bovina. La sal se utiliza como conservante principal en la preparación de carnes secas, sin embargo ciertas especies de microorganismos, conocidos como halófilos, se desarrollan idealmente en presencia de altas concentraciones de sal y consecuentemente los alimentos salados pueden contener halófilos y provocar cambios indeseables en estos productos. En este contexto, este estudio tuvo como objetivo aislar, caracterizar y evaluar los parámetros de crecimiento de cepas halófilas aisladas de charque. Se aislaron dos cepas halófilas, siendo la cepa C11 con características morfológicas de cocos colonia crema blanca, mientras que la cepa V22 presentó pleomorfa pigmentada en rojo. Ambas cepas fueron gram negativas, catalasa y oxidada positivas, con un tiempo de crecimiento ideal a los 15 días de incubación a 37 °C. Las cepas fueron neutrófilos, creciendo solo a pH 7.0 y luego de un diseño experimental factorial 2x3, para evaluar y optimizar el crecimiento de las cepas en diferentes concentraciones de NaCl, MgCl2 y extracto de levadura. Encontramos que, para ambas condiciones óptimas de crecimiento, las variables estudiadas oscilaron entre 25 y 35 g L-1 de MgCl2, 5 g L-1 de extracto de levadura, pero para NaCl, la cepa C11 no creció en un medio que contenía 300 (óptimamente a 200) g L-1, mientras que V22 no creció en medio que contenía 100 (óptimamente a 300) g L-1. Por tanto, las características de los aislados sugieren que pertenecen a la familia Halobacteriaceae.

Citas

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Publicado

19/02/2022

Cómo citar

CHAGAS JUNIOR, A. F.; GUEDES, E. H. S. .; SOARES, C. M. da S. .; CUNHA, M. G. . .; SANTOS, A. L. dos .; AGUIAR, A. O. .; MARTINS, A. L. L. . Aislamiento y caracterización de cepas halófilas de charque. Research, Society and Development, [S. l.], v. 11, n. 3, p. e21511326368, 2022. DOI: 10.33448/rsd-v11i3.26368. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/26368. Acesso em: 23 nov. 2024.

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Sección

Ciencias Agrarias y Biológicas