A promising approach to enhance microalgae productivity by exogenous supply of vitamins

Table 1 Vitamin requirement for different microalgal species within in a phylum

Algal phylum	Total species	Species requiring specific vitamin
Algal phylum	Total species	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

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