TY  - JOUR
A1  - Spijkerman, Elly
A1  - Wacker, Alexander
T1  - Interactions between P-limitation and different C conditions on the fatty acid composition of an extremophile microalga
JF  - Extremophiles : life under extreme conditions
N2  - The extremophilic microalga Chlamydomonas acidophila inhabits very acidic waters (pH 2-3.5), where its growth is often limited by phosphorus (P) or colimited by P and inorganic carbon (CO(2)). Because this alga is a major food source for predators in acidic habitats, we studied its fatty acid content, which reflects their quality as food, grown under a combination of P-limited and different carbon conditions (either mixotrophically with light + glucose or at high or low CO(2), both without glucose). The fatty acid composition largely depended on the cellular P content: stringent P-limited cells had a higher total fatty acid concentration and had a lower percentage of polyunsaturated fatty acids. An additional limitation for CO(2) inhibited this decrease, especially reflected in enhanced concentrations of 18:3(9,12,15) and 16:4(3,7,10,13), resulting in cells relatively rich in polyunsaturated fatty acids under colimiting growth conditions. The percentage of polyunsaturated to total fatty acid content was positively related with maximum photosynthesis under all conditions applied. The two factors, P and CO(2), thus interact in their effect on the fatty acid composition in C. acidophila, and colimited cells P-limited algae can be considered a superior food source for herbivores because of the high total fatty acid content and relative richness in polyunsaturated fatty acids.
KW  - Acidophilic algae
KW  - Cellular P quota
KW  - Chlamydomonas acidophila
KW  - Chlorophyceae
KW  - Colimitation
KW  - CO(2)
KW  - Fatty acid composition
KW  - Food quality
KW  - Glucose
KW  - Mixotrophy
KW  - Photosynthesis
KW  - Phytoplankton
KW  - Phosphorus limitation
Y1  - 2011
U6  - https://doi.org/10.1007/s00792-011-0390-3
SN  - 1431-0651
VL  - 15
IS  - 5
SP  - 597
EP  - 609
PB  - Springer
CY  - Tokyo
ER  -