Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa

Background: The fermentation substrate efficiency of glucose supplemented with guava seed flour (GGSF) or glucose supplemented with dry Aspergillus niger mycelium (GANM) was evaluated during the production of biomass and antimicrobial compounds by the lactic acid bacteria Weissella confusa. Results:...

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Autores principales:	Serna-Cock,Liliana, Mera-Ayala,José Daniel, Angulo-López,Jorge Eduardo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2013
Materias:	agroindustrial residue bacteriocin biomass inhibition
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600017
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spelling	oai:scielo:S0717-345820130006000172014-01-16Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusaSerna-Cock,LilianaMera-Ayala,José DanielAngulo-López,Jorge Eduardo agroindustrial residue bacteriocin biomass inhibition Background: The fermentation substrate efficiency of glucose supplemented with guava seed flour (GGSF) or glucose supplemented with dry Aspergillus niger mycelium (GANM) was evaluated during the production of biomass and antimicrobial compounds by the lactic acid bacteria Weissella confusa. Results: The fermentation substrate efficiency was measured by comparing the biomass formation, substrate consumption, substrate conversion, antimicrobial activity and product yield. The antimicrobial activity was measured against a commercial Staphylococcus aureus strain. The results were compared against fermentations performed in a commercial substrate (CS), the MRS (Man-Rogosa-Sharpe) substrate. The fermentations were performed discontinuously for 4 hrs at 100 rpm and 32ºC. The biomass production exhibited a statistically significant difference (P ≤ 0.05) between treatments. The biomass production was 13.98% higher in the CS than in the GGSF and GANM substrates; however, there were no statistically significant differences for the specific growth rate. Conclusions: The GGSF and GANM substrates favored an antimicrobial activity against Staphylococcus aureus during the second and third hours of fermentation (inhibition diameter was 6.11% and 4.72%, respectively). The GGSF, GANM and CS substrates did not present statistically significant differences for the production of antimicrobial substances against Staphylococcus aureus. Therefore, GGSF and GANM can be considered as viable and economical alternative nitrogen sources for the production of the antimicrobial compounds formed by Weissella confusa in submerged fermentations.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.16 n.6 20132013-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600017en10.2225/vol16-issue6-fulltext-1
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	agroindustrial residue bacteriocin biomass inhibition
spellingShingle	agroindustrial residue bacteriocin biomass inhibition Serna-Cock,Liliana Mera-Ayala,José Daniel Angulo-López,Jorge Eduardo Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
description	Background: The fermentation substrate efficiency of glucose supplemented with guava seed flour (GGSF) or glucose supplemented with dry Aspergillus niger mycelium (GANM) was evaluated during the production of biomass and antimicrobial compounds by the lactic acid bacteria Weissella confusa. Results: The fermentation substrate efficiency was measured by comparing the biomass formation, substrate consumption, substrate conversion, antimicrobial activity and product yield. The antimicrobial activity was measured against a commercial Staphylococcus aureus strain. The results were compared against fermentations performed in a commercial substrate (CS), the MRS (Man-Rogosa-Sharpe) substrate. The fermentations were performed discontinuously for 4 hrs at 100 rpm and 32ºC. The biomass production exhibited a statistically significant difference (P ≤ 0.05) between treatments. The biomass production was 13.98% higher in the CS than in the GGSF and GANM substrates; however, there were no statistically significant differences for the specific growth rate. Conclusions: The GGSF and GANM substrates favored an antimicrobial activity against Staphylococcus aureus during the second and third hours of fermentation (inhibition diameter was 6.11% and 4.72%, respectively). The GGSF, GANM and CS substrates did not present statistically significant differences for the production of antimicrobial substances against Staphylococcus aureus. Therefore, GGSF and GANM can be considered as viable and economical alternative nitrogen sources for the production of the antimicrobial compounds formed by Weissella confusa in submerged fermentations.
author	Serna-Cock,Liliana Mera-Ayala,José Daniel Angulo-López,Jorge Eduardo
author_facet	Serna-Cock,Liliana Mera-Ayala,José Daniel Angulo-López,Jorge Eduardo
author_sort	Serna-Cock,Liliana
title	Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
title_short	Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
title_full	Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
title_fullStr	Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
title_full_unstemmed	Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
title_sort	guava psidium guajava seed flour and dry aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by weissella confusa
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600017
work_keys_str_mv	AT sernacockliliana guavapsidiumguajavaseedflouranddryaspergillusnigermyceliumasnitrogensourcesfortheproductionofbiomassandantimicrobialcompoundsproducedbyweissellaconfusa AT meraayalajosedaniel guavapsidiumguajavaseedflouranddryaspergillusnigermyceliumasnitrogensourcesfortheproductionofbiomassandantimicrobialcompoundsproducedbyweissellaconfusa AT angulolopezjorgeeduardo guavapsidiumguajavaseedflouranddryaspergillusnigermyceliumasnitrogensourcesfortheproductionofbiomassandantimicrobialcompoundsproducedbyweissellaconfusa
_version_	1718441885561782272

Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa

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