Skip to main content

Table 3 Pigment and lipid composition of M. stellatus and C. crispus: chlorophyll a concentration, ratios of pigments to chlorophyll a (β-carotene/Chl a, lutein/Chl a, phycoerythrin/Chl a, phycocyanin/Chl a), total lipid content, saturation states of fatty acids [sum of saturated fatty acids (SFA), sum of monounsaturated fatty acids (MUFA), sum of polyunsaturated fatty acids (PUFA), saturated/unsaturated fatty acid ratio (SFA/UFA)] and shorter-chain/longer-chain fatty acid ratio (C14 + C16/C18 + C20) of initial thallus branches collected on four sampling events (October 2011, March 2012, May 2012 and August 2012)

From: Fatty acid compositions associated with high-light tolerance in the intertidal rhodophytes Mastocarpus stellatus and Chondrus crispus

Response variables of initial thallus branches Sampling event
October 2011 March 2012 May 2012 August 2012
Chl a (µg mg−1 dry weight)
 Mast-ex 0.31 ± 0.01 0.26 ± 0.01 0.30 ± 0.01 0.31 ± 0.02
 Mast-ov 0.23 ± 0.02 0.26 ± 0.01 0.28 ± 0.01 0.22 ± 0.01
 Chon-ov 0.32 ± 0.03 0.33 ± 0.01 0.40 ± 0.04 0.35 ± 0.03
β-carotene/Chl a
 Mast-ex 0.11 ± 0.00a 0.11 ± 0.00a 0.12 ± 0.00a 0.11 ± 0.00b
 Mast-ov 0.11 ± 0.00a 0.11 ± 0.00a 0.12 ± 0.00a 0.11 ± 0.00b
 Chon-ov 0.11 ± 0.00a 0.11 ± 0.00a 0.11 ± 0.00b 0.12 ± 0.00a
Lutein/Chl a
 Mast-ex 0.21 ± 0.01a 0.23 ± 0.00a 0.25 ± 0.01a 0.23 ± 0.00a
 Mast-ov 0.19 ± 0.01b 0.20 ± 0.01b 0.24 ± 0.01a 0.23 ± 0.00a
 Chon-ov 0.17 ± 0.01b 0.19 ± 0.01b 0.18 ± 0.01b 0.20 ± 0.01b
Phycoerythrin/Chl a
 Mast-ex 1.48 ± 0.29 1.72 ± 0.12 2.05 ± 0.23 2.11 ± 0.72
 Mast-ov 1.70 ± 0.30 2.82 ± 0.95 1.48 ± 0.28 2.01 ± 0.78
 Chon-ov 2.24 ± 0.33 1.76 ± 0.36 1.47 ± 0.19 2.10 ± 0.47
Phycocyanin/Chl a
 Mast-ex 0.27 ± 0.05 0.26 ± 0.02 0.30 ± 0.04 0.37 ± 0.10
 Mast-ov 0.30 ± 0.04 0.41 ± 0.12 0.24 ± 0.04 0.39 ± 0.15
 Chon-ov 0.45 ± 0.08 0.47 ± 0.09 0.32 ± 0.03 0.50 ± 0.11
Total lipid (% of dry weight)
 Mast-ex 1.37 ± 0.15b 1.21 ± 0.14b 1.19 ± 0.05b 1.62 ± 0.24a
 Mast-ov 1.11 ± 0.08b 1.01 ± 0.07b 1.21 ± 0.03b 1.12 ± 0.04b
 Chon-ov 1.69 ± 0.10a 1.87 ± 0.06a 1.70 ± 0.04a 1.31 ± 0.12b
SFA (mass% of total fatty acids)
 Mast-ex 35.6 ± 0.7 30.4 ± 0.2 32.0 ± 0.2 37.6 ± 0.7
 Mast-ov 34.4 ± 0.3 30.6 ± 0.2 32.1 ± 0.1 37.1 ± 0.8
 Chon-ov 36.3 ± 1.4 30.4 ± 0.4 32.0 ± 0.3 34.4 ± 0.4
MUFA (mass% of total fatty acids)
 Mast-ex 10.4 ± 1.5 13.2 ± 0.2 11.3 ± 0.1 9.5 ± 1.3
 Mast-ov 13.7 ± 0.7 13.5 ± 0.1 10.6 ± 0.1 10.4 ± 0.2
 Chon-ov 9.7 ± 0.4 8.6 ± 0.3 9.9 ± 0.2 9.4 ± 0.2
PUFA (mass% of total fatty acids)
 Mast-ex 54.0 ± 0.9 56.4 ± 0.1 56.7 ± 0.2 53.0 ± 0.7
 Mast-ov 52.0 ± 0.4 55.9 ± 0.2 57.3 ± 0.2 52.5 ± 1.0
 Chon-ov 54.1 ± 1.2 61.0 ± 0.4 58.1 ± 0.3 56.2 ± 0.2
SFA/UFA
 Mast-ex 0.55 ± 0.02ab 0.44 ± 0.00a 0.47 ± 0.00a 0.60 ± 0.02a
 Mast-ov 0.52 ± 0.01b 0.44 ± 0.00a 0.47 ± 0.00a 0.59 ± 0.02a
 Chon-ov 0.57 ± 0.03a 0.44 ± 0.01a 0.47 ± 0.01a 0.52 ± 0.01b
C14 + C16/C18 + C20
 Mast-ex 0.58 ± 0.02 0.46 ± 0.00 0.49 ± 0.00 0.62 ± 0.02
 Mast-ov 0.56 ± 0.01 0.47 ± 0.00 0.49 ± 0.00 0.60 ± 0.02
 Chon-ov 0.52 ± 0.01 0.42 ± 0.01 0.46 ± 0.01 0.50 ± 0.01
  1. Table shows mean ± SEM (n = 5). Dark circles indicate isolate-specific (Mast-ex, Mast-ov and Chon-ov) differences within all four sampling events that are significant at p < 0.05 (significant isolate effect of 2-way ANOVA followed by a Fisher’s LSD test). Different letters (a and b) indicate significant differences among algal isolates within one of the four sampling events (significant interaction isolate × sampling event of 2-way ANOVA followed by a Fisher’s LSD test, p < 0.05)
  2. Mast-ex, Mastocarpus stellatus from higher levels of the lower intertidal; Mast-ov, Mastocarpus stellatus from overlapping zone in deeper levels of lower intertidal; Chon-ov, Chondrus crispus from overlapping zone in deeper levels of lower intertidal; SEM, standard error of the mean