The Alterations of Biofilm Formation and EPS Characteristics of a Diatom by a Sponge-Associated Bacterium Psychrobacter sp.

Table 2

EPS production per biomass of diatom Stauroneis sp. incubated in the presence of bacterial supernatant crude extract.

Fraction	Control					Treatment
	SL-EPS	F-TB-EPS	BF-LB-EPS	BF-TB-EPS	Total	SL-EPS	F-TB-EPS	BF-LB-EPS	BF-TB-EPS	Total
EPS dry weight (g)	7.13 ± 0.01	0.33 ± 0.05	1.79 ± 0.01	0.38 ± 0.02	9.63 ± 0.03	19.13 ± 0.01	0.39 ± 0.05	1.04 ± 0.02	0.40 ± 0.02	20.96 ± 0.03
Percentage (%)	74.00	3.46	18.62	3.92	100	91.29	1.87	4.94	1.90	100
EPS production (g/g cell dry weight)	12.33 ± 0.36	1.00 ± 0.13	7.34 ± 0.48	1.54 ± 0.04	16.66 ± 0.50	37.96 ± 0.27	1.10 ± 0.12	7.05 ± 0.04	2.71 ± 0.14	41.59 ± 0.24

Dry weights of fractions were independently measured at least three times, and the means and standard deviations are shown. Percentages were calculated based on the means of dry weights. EPS production was calculated as the EPS weight divided by cell dry weight, and means and standard deviations are shown. Independent t-test was used to compare the control and treatment. .