Table 1.
Cases of experimentally confirmed microbial auxotrophy from a variety of aquatic environments.
| Compound | Auxotrophic species | Environment | Citation |
|---|---|---|---|
| Cobalamin | Chlorophyta (44/148)*, Rhodophyta (12/13), Cryptophyta (5/6), Dinophyta (24/27), Euglenophyta (13/15), Haptophyta (10/17), Heterokontophyta (47/80) | Open ocean, coastal, freshwater | reviewed Croft et al. 2006 |
| Thiamin | Chlorophyta (19/148)*, Cryptophyta (5/6), Dinophyta (7/27), Euglenophyta (11/15), Haptophyta (14/17), Heterokontophyta (11/80) | Open ocean, coastal, freshwater | reviewed Croft et al. 2006 |
| Biotin | Cryptophyta (1/6)*, Dinophyta (7/27), Euglenophyta (1/15), Heterokontophyta (5/80) | Open ocean, coastal, freshwater | reviewed Croft et al. 2006 |
| 4-amino-5-hydroxymethyl-2- methylpyrimidine | SAR11 | Open ocean | Carini et al. 2014 |
| Glycine, serine | SAR11 | Open ocean | Tripp et al. 2009 |
| Isoleucine, valine | Pseudomonas syringae | Antarctic freshwater | Sahu and Ray 2008 |
*
Refers to the number of auxotrophic species out of the total number of species surveyed by Croft et al. 2006.