An investigation of antibacterial activity of New Zealand seaweed-associated marine bacteria

Mehrnoush Tangestani, Paul Broady, Arvind Varsani

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Aim: To explore seaweed-associated bacteria as prospective producers of bioactive material with antibacterial properties. Materials & methods: 143 bacterial species were isolated from the surface of 15 New Zealand marine macroalgae. Bacterial extracts obtained using dimethyl sulfoxide and ethyl acetate were screened for antagonistic activities against three antimicrobial susceptibility indicators: Kocuria rhizophila, Staphylococcus epidermidis and Escherichia coli, using well-diffusion method. For selected species, minimum inhibitory concentration was determined, followed by a phylogenetic identification based on 16S rRNA gene sequences. Results: Among all bacteria screened, seven that belonged to the genera Vibrio, Pseudoalteromonas, Psychromonas and Cobetia, showed antagonistic activity against all three indicators. Conclusion: Seaweed-associated bacteria produce bioactive compounds with antimicrobial potential and possible biomedical application in aquatic habitats.

Original languageEnglish (US)
Pages (from-to)1167-1179
Number of pages13
JournalFuture Microbiology
Issue number15
StatePublished - Oct 2021


  • Cobetia
  • New Zealand
  • Pseudoalteromonas
  • Psychromonas
  • Vibrio
  • antibacterial activity
  • seaweed-associated bacteria

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)


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