Halobacterial representatives were isolated from salted fish, naturally occurring salt pans as well as artificial saline pools in the Mediterranean area. The isolation techniques experimented proved successful, allowing halophilic archaea to be retrieved in almost 72% of analysed samples. About 65% of strains could be presumptively ascribed to the species Haloarcula marismortui by RFLP (Restriction Fragment Length Polymorphism) grouping and 16S rRNA gene sequence comparison. Nevertheless, cluster analysis of RAPD-PCR patterns revealed a wide heterogeneity among isolated strains. Biochemical features of technological interest, such as proteolytic, lipolytic and decarboxylase activity, were investigated in order to elucidate the role of archaea during ripening of salted anchovies. Proteolytic activity was only evidenced on the sarcoplasmic fraction extracted from fresh anchovies and for only four strains out of 21. No strain revealed either lipolytic capability on cod liver oil or proteolytic activity on fresh anchovies myofibrillar extract. Finally, only one strain exhibited decarboxylase activity, minimizing the potential responsibility for the spoilage of salted anchovies, since little direct evidence of the degradation process is provided. However, the possible pro-technological contribution of proteolytic strains to improve the quality of salted anchovies needs further investigation.

Characterization of halophilic Archaea isolated from different hypersaline ecosystems / Moschetti, G.; Aponte, Maria; Blaiotta, Giuseppe; Casaburi, A.; Chiurazzi, M.; Ventorino, V.; Villani, Francesco. - In: ANNALS OF MICROBIOLOGY. - ISSN 1590-4261. - 56(2):(2006), pp. 119-127.

Characterization of halophilic Archaea isolated from different hypersaline ecosystems

APONTE, MARIA;BLAIOTTA, GIUSEPPE;V. VENTORINO;VILLANI, FRANCESCO
2006

Abstract

Halobacterial representatives were isolated from salted fish, naturally occurring salt pans as well as artificial saline pools in the Mediterranean area. The isolation techniques experimented proved successful, allowing halophilic archaea to be retrieved in almost 72% of analysed samples. About 65% of strains could be presumptively ascribed to the species Haloarcula marismortui by RFLP (Restriction Fragment Length Polymorphism) grouping and 16S rRNA gene sequence comparison. Nevertheless, cluster analysis of RAPD-PCR patterns revealed a wide heterogeneity among isolated strains. Biochemical features of technological interest, such as proteolytic, lipolytic and decarboxylase activity, were investigated in order to elucidate the role of archaea during ripening of salted anchovies. Proteolytic activity was only evidenced on the sarcoplasmic fraction extracted from fresh anchovies and for only four strains out of 21. No strain revealed either lipolytic capability on cod liver oil or proteolytic activity on fresh anchovies myofibrillar extract. Finally, only one strain exhibited decarboxylase activity, minimizing the potential responsibility for the spoilage of salted anchovies, since little direct evidence of the degradation process is provided. However, the possible pro-technological contribution of proteolytic strains to improve the quality of salted anchovies needs further investigation.
2006
Characterization of halophilic Archaea isolated from different hypersaline ecosystems / Moschetti, G.; Aponte, Maria; Blaiotta, Giuseppe; Casaburi, A.; Chiurazzi, M.; Ventorino, V.; Villani, Francesco. - In: ANNALS OF MICROBIOLOGY. - ISSN 1590-4261. - 56(2):(2006), pp. 119-127.
File in questo prodotto:
File Dimensione Formato  
Moschetti et al. 2006.pdf

solo utenti autorizzati

Tipologia: Documento in Post-print
Licenza: Accesso privato/ristretto
Dimensione 847.45 kB
Formato Adobe PDF
847.45 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/156987
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 14
social impact