Table 1.
Vitamin requirement for different microalgal species within in a phylum
| Algal phylum | Total species | Species requiring specific vitamin | ||
|---|---|---|---|---|
| B1 | B7 | B12 | ||
| Chlorophyta | 151 | 22 | 0 | 45 |
| Rhodophyta | 13 | 0 | 0 | 12 |
| Cryptophyta | 6 | 5 | 1 | 5 |
| Dinophyta | 28 | 7 | 8 | 24 |
| Euglenophyta | 15 | 11 | 1 | 13 |
| Haptophyta | 18 | 15 | 0 | 10 |
| Heterokontophyta | 81 | 12 | 5 | 47 |
| Total | 312 | 72 | 15 | 156 |
| Percentage | 23 | 4.8 | 50 | |
Extracted from following references: [10, 15, 16, 18, 27, 29, 33, 63, 64]
More than half of the microalgal species expressing freshwater and marine inhabitants (156 species out of 312 algal species) have an obligate requirement for vitamin B12 in culture medium for growth, suggesting that they are auxotrophs for vitamin B12, while 23% (72 species out of 312 algal species) require vitamin B1 and only 4.8% (15 species out of 312 algal species) require vitamin B7 [31]. Nevertheless, microalgal species in a phylum might have obligate requirements for one, two or all three cofactors in different combinations; though they display no correlation within any one particular lineage