Table 1.
Molecular distribution of membrane lipids in plankton cultures and total planktonic community of the NPSG
| Culture or sample | Axenic | MGDG | DGDG | SQDG | PG | PE | PC | SQDG/PG |
|---|---|---|---|---|---|---|---|---|
| Prochlorococcus | ||||||||
| MED4 | Yes | 22 | 10 | 66 | 2 | – | – | 33.5 |
| NATL1A | No | 25 | 10 | 50 | 9 | 5 | tr | NA |
| SS120 | No | 17 | 7 | 61 | 8 | 5 | 1 | NA |
| MIT9312 | No | 31 | 53 | 7 | 9 | tr | – | NA |
| Synechococcus | ||||||||
| WH8103 | Yes | 7 | 37 | 52 | 3 | – | – | 17.3 |
| WH8113 | Yes | 5 | 26 | 56 | 8 | – | – | 7.0 |
| WH8020 | Yes | 11 | 31 | 47 | 7 | – | – | 6.7 |
| WH8018 | Yes | 4 | 48 | 45 | 3 | – | – | 15.0 |
| WH8101 | Yes | 18 | 41 | 38 | 3 | – | – | 12.7 |
| WH8102 | No | 14 | 25 | 50 | 8 | 2 | – | NA |
| Other cyanobacteria | ||||||||
| Synechocystis sp. PCC6803 | Yes | 14 | 56 | 19 | 10 | – | – | 1.9 |
| Synechocystis sp. PCC6803* | Yes | 59 | 17 | 16 | 8 | – | – | 2.0 |
| Gloeobacter violaceus | Yes | 5 | 78 | – | 17 | – | – | NA |
| Trichodesmium erythraeum | Yes | 45 | 16 | 20 | 18 | – | – | 1.1 |
| Heterotrophic bacteria | ||||||||
| Vibrio fischeri | Yes | – | – | – | 10 | 76 | – | NA |
| Roseobacter denitrificans | Yes | – | – | – | 44 | – | 39 | NA |
| Pseudomonas putida | Yes | – | – | – | 13 | 65 | – | NA |
| NPSG plankton | ||||||||
| October, 2002 | NA | ND | ND | ND | ND | ND | ND | ND |
| July, 2003 | NA | ND | ND | ND | ND | ND | ND | ND |
| March, 2004 | NA | 16 | 7 | 25 | 21 | 9 | 22 | 1.2 |
| July, 2004 | NA | 15 | 8 | 24 | 24 | 10 | 19 | 1.0 |
Values are percent of total polar membrane lipids as determined by HPLC/ESI-IT-MSn. –, none detected; tr, trace (<0.5%); ND, not determined; NA, not applicable; MGDG, monogalactosyldiacylglycerol; DGDG, digalactosyldiacylglycerol.
*Ref. 22.