Bioprospecting of exopolysaccharide-producing bacteria from different natural ecosystems for biopolymer synthesis from vinasse

Chemical and Biological Technologies in Agriculture

Table 3 Evaluation of EPS synthesis by different A. chroococcum strains in liquid media containing vinasse (1%) without and with 2% or 5% of sucrose after 48 h of incubation at 30 °C

A. chroococcum strains	V (1%)		V (1%) S (2%)		V (1%) S (5%)
A. chroococcum strains	Growth*	EPS^§	Growth*	EPS^§	Growth*	EPS^§,†
76A	+	− +	+	− +	+	+ 25.3 ± 0.10^a
67B	–	–	–	–	+	+ 22.8 ± 0.22^b
AZ1	–	–	–	–	+	+ 21.5 ± 0.26^c

V vinasse, S sucrose
*bacterial growth: − = absence of growth; + = presence of growth (about 10⁸ CFU/mL)
^§EPS synthesis: − = no synthesis of EPS; − + = low synthesis of EPS; + = high synthesis of EPS
^†mg of EPS/30 mL of medium. The values represent the mean ± S.D. of three replicates of independent experiments. Different letters indicate significant difference (P ≤ 0.01)