Antibacterial potential of symbiont bacteria of brown algae (Turbinaria conoides) obtained from Indonesian waters

Abstract

Abstract. Dharmayanti N, Anti A, Siregar RR, Sipahutar Y, Permadi A, Siregar AN, Salampessy RB, Sujuliyanti, Nurbani SZ, Purnamasari HB. 2021. Title. Biodiversitas 22: 373-378. Brown seaweeds have the potential to produce bioactive compounds. Bacteria associated with seaweeds are involved in the production of metabolites. Microbes may be present as a living symbiotic in association with other algae as epiphytes or endophytes. In this study, bacteria isolated from brown seaweed (Turbinaria conoides) were tested for antibacterial activity. A total of 14 bacteria were isolated, of which 6 were isolated from external tissue, while 8 from internal tissue. Results of an antagonistic test revealed that 7 isolates showed inhibitory activity against Staphylococcus aureus and only 1 isolate showed the inhibition against both S. aureus and Escherichia coli. Phenotypic and genotypic analysis showed that the symbiont bacteria was Lactobacillus plantarum.

Antibacterial and antifungal effectiveness of Turbinaria conoides as a denture cleanser

“…Salah satu penelitian membandingkan T.conoides dengan antibiotik amoksisilin menunjukkan ekstrak T.conoides memiliki inhibisi yang lebih besar dibandingkan amoksisilin; membuktikannya memiliki potensi besar sebagai bahan dasar alami pembuatan denture cleanser sehingga diharapkan dapat membantu pasien dalam meningkatkan kesehatan rongga mulutnya. 3,19…”

“…Walaupun begitu, aktivivitas ekstrak T.conoides secara umum terbukti dapat menginhibisi bakteri. 19 Penelitian selanjutnya oleh Ponnan dkk menunjukkan hasil bahwa aktivitas antibakteri yang paling tinggi ditunjukkan pada ekstrak T.conoides dengan pelarut etil asetat dengan zona inhibisi 13-28 mm pada konsentratrasi 10-80μg/mL diikuti oleh dichloromethane, hexane dan aqueous. Zona inhibisi dichloromethane, hexane dan aqueous masing-masing menunjukkan zona hambat berdiameter 10-24, 5-17 dan 5-9 mm.…”

The bioactive compounds and microbial endophytes from brown seaweed as antibacterial for aquaculture disease management: A review

“…Therefore, endophytic microorganisms can be used as a substitute for the plant that is the host [15] . Several endophytic bacteria and fungi were found in brown algae, namely the endophytic bacteria L. plantarum associated with brown seaweed T. conoides with Bacillus, sp [8] ; Yersinia sp. and T. ornata with Bacillus sp.…”

“…The antibacterial activity of brown seaweed extracts have the inhibition zone ranged from 5.97±5.09 mm-14.66±0.57 mm. Furthermore, endophytic microbes obtained from several species of brown seaweed also have the potential as antibacterial to fight pathogens such as Bacillus sp., Yersinia sp., L. plantarum and Bacillus cereus/Bacillus thuringiensis bacteria that can inhibit S. aureus with inhibition zone ability 7.33 mm, 6.67 mm6.7 mm, 7.66 mm [9,8,7] . Bacillus sp.…”

“…Bioactive compounds produced by endophytic bacteria can be used as antibacterial [6] . Several studies has shown that endophytic bacteria from brown seaweed were able to inhibit the pathogens such as Staphylococcus aureus [7,8,9,10,11] , Pseudomonas aeruginosa [10,11] , and Klebsiella pneumoniae [11] . In addition, endophytic fungi were isolated from brown seaweed S. oligocystum, S. polycystum, and P. minor also have the potential as antibacterial to against S. aureus [12] .…”