A defined mineral salts (DMS) medium plus 5.0 g l−1 NA
or 5.0 g l−1 UDA or a mixture of 2.5 g l−1 NA and 2.5 g l−1
UDA as the only carbon sources was used. The DMS
medium contained per liter: 6.35 g Na2HPO4, 2.7 g KH2PO4,
0.39 g MgSO4, 0.5 g (NH4)2SO4 and 1 ml of trace element
solution [35].