Table 1.
The impact of variable light intensities, change of temperature and pH on lipid accumulation and fatty acid profiles on the basis of % dry weight.
| Algae | Light intensities | Algae response | References |
|---|---|---|---|
| Chlorella vulgaris | 2700 lx | lipid 19% | (Azizi et al., 2020) |
| 3300 lx | lipid 13% | ||
| Chlorella vulgaris | 24 h photoperiod | Lipid production increased | |
| Pavlova lutheri | High light intensities | Lipid production increased | |
| Isochrysis galbana, Nannochloropsis oculata | High light intensities | Lipid production increased | |
| Scenedesmus sp. | 250–400 µmolm2 s −1 | Lipid production increased | |
| Isochrysis galbana | Shorter light/dark regime | PUFA’s increased | |
| Selenastrum capricornutum | Dark treatment | Increase in 18:3 and decrease in 18:1 | |
| Algae | Temperature (°C) | Response | References |
| Nannochloropsis oculata | Shift – 20 to 25 | 15% increase in total lipid | (Wei et al., 2015) |
| Chaetoceros sp. | 25 | 16.8% increase in total lipid | |
| Ochromonas danica | 15 to 30 | Increase in total lipids | |
| Nannochloropsis oculata | > 30 | Polar lipid increased | |
| Nitzschia laevis | 15 to 23 | TAG increased | (Touliabah et al., 2020) |
| Dunaliella salina | 30 to 12 | UFA’s increased | |
| Synechococcus Lividus | 55 to 38 | 16:1 and 18:1 increased | |
| Selenastrum capricornutum | 25 to 10 | C 18:1 increased | |
| Algae | Optimal pH | Response | References |
| Chlorella sp. | 8 | Lipid content 23% | (Qiu et al., 2017) |
| C. vulgaris | 7.5 | 53.43 | |
| Chlorella protothecoides | 6.5 | 3.75 g/l lipid yield | |
| Pavlova lutheri | 8.0 | 35% lipid content | |
| Nannochloropsis salina | 8.0–9.0 | 21.8 | |
| T. suecica | 9.0 | lipid content increased | |
| Chlorella vulgaris | 7.0, 8.0, 9.0, and 10.0. | No change | (Nouri et al., 2021) |
| 6.0, 7.0, 9.0 | No change | ||
| Chroococcus minor | 9.0 | 22 | |
| B. braunii | 6.5 | 2.2 gm−2/d lipid productivity |