Mangrove sediment, a new source of potential biosurfactant-producing bacteria

Annals of Microbiology

Table 1 Growth of bacterial strains on different carbon sources and biosurfactant production in culture supernatants

Strain	Gram stain^a	Growth^b					DCT^c	EA^c
Strain	Gram stain^a	CS	Glucose	n-Hexadecane	Molasses	ULO	DCT^c	EA^c
Thungwa, Satun sediment
2/3	N	+	+	−	+	+	+	+
7	N	+	+	−	+	+	+	+
9/4	N	−	+	−	+	+	+	+
11	N	+	+	−	−	+	+	−
11/6	N	+	+	−	+	+	+	+
Palain, Trang sediment
33	N	+	−	+	+	+	+	+
54	P	+	+	−	+	+	+	+
57	N	+	+	−	+	+	+	+
79	N	+	+	−	+	+	+	+
Sikao, Trang sediment
183	P	+	+	−	+	−	+	+
213	N	+	+	−	+	+	+	+
318	P	+	+	−	+	+	+	+
319	N	+	+	−	+	+	+	+
418	N	−	+	−	+	+	+	+
Ranot, Songkhla sediment
1033	N	+	+	+	+	+	+	+
1106	N	+	+	+	+	+	+	+
1291	N	+	+	−	+	+	+	+
Huasai, Nakhonsrithammarat sediment
1297	N	+	+	−	+	−	+	+
1310	P	+	+	−	+	+	+	−
1457	N	+	+	−	+	+	+	+

CS, Commercial sugar; ULO, used lubricating oil; EA, small-scale emulsification assay; DCT, qualitative drop-collapsing test
^aGram stain: P, Gram-positive; N, Gram-negative
^b+, Biomass increase of >10-fold compared to the inoculum; –, biomass increase of the tested strain of <10-fold (OD₆₀₀ < 1.0)
^c+, Positive test at least with one carbon source; –, negative test with the five tested carbon sources

ISSN: 1869-2044