Table 4.
Seasonal variation in biomass and PHB yields of A. fertilissima under optimized conditionsa
| Season | Biomass |
PHB |
||||
|---|---|---|---|---|---|---|
| Volumetric yield (mg liter−1) | Areal density (g m−2) | Total yield (g) | Volumetric yield (mg liter−1) | Areal density (g m−2) | Total yield (g) | |
| Summer | 572.7 ± 2.19C | 114.5 ± 0.93C | 85.9 ± 0.89C | 460.3 ± 1.89C | 92.0 ± 0.91C | 69.0 ± 0.59C |
| Rainy | 550.3 ± 2.06B | 110.1 ± 0.89B | 82.5 ± 0.81B | 445.2 ± 1.82B | 89.0 ± 0.83B | 66.8 ± 0.57B |
| Winter | 498.2 ± 1.93A | 99.6 ± 0.85A | 74.7 ± 0.76A | 398.6 ± 1.74A | 79.7 ± 0.75A | 59.7 ± 0.51A |
a
Optimized conditions were as follows. A. fertilissima cultures grown in FPD for 15 days were harvested and subsequently transferred to the same volume of nitrate-free BG-11 medium containing 0.26% citrate, 0.28% acetate, and 5.58 mg liter−1 K2HPO4 in FRP tanks at a culture depth of 20 cm for 5 days (34). The values represent the averages ± standard errors of data based on three independent determinations. The values in columns followed by different letters are significantly different from each other (P < 0.05; Duncan's new multiple-range tests). Separate analysis was done for each column.