Journal of Polymers / 2013 / Article / Tab 3

Research Article

Phototrophic Growth and Accumulation of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by Purple Nonsulfur Bacterium Rhodopseudomonas palustris SP5212

Table 3

Biphasic growth and PHA accumulation by R. palustris SP5212 with hydroxybutyrate and valerate as cosubstrate.

Cosubstrate Incubation, days Growth, g/LPHA, % CDWComposition of PHA, Mol%
3HB3HV

60.4211.2672.5727.42
80.5029.1368.6731.32
Hydroxybutyrate100.6154.1766.5933.41
120.4939.4765.0734.92
140.4537.3457.1742.82

60.3314.2276.1523.84
80.3823.2074.0525.94
Valerate100.4537.4069.1330.86
120.5129.1667.0332.96
140.4925.1663.9636.03

The isolate was grown first in malate medium for 4 days, and cells were harvested, washed, and aseptically transferred to acetate media supplemented with 0.1% hydroxybutyrate and 0.1% valerate; other conditions are the same as under Table 1.

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