The long and short of it: temperature-dependent modifications of fatty acid chain length and unsaturation in the galactolipid profiles of the diatoms Haslea ostrearia and Phaeodactylum tricornutum

Dodson, V. Joshua; Mouget, Jean‐Luc; Dahmen, Jeremy L.; Leblond, Jeffrey D.

doi:10.1007/s10750-013-1790-4

Cited by 42 publications

(36 citation statements)

References 47 publications

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“…This seems to agree with finding of Dodson et al . () on the loss of 14:0 in the sn ‐1 position of galactolipids in diatoms at high temperature. Moreover, both Cladocera and Copepoda from cold habitats had significantly greater percentages and quantity of 14:0, and lower percentages of 18:0, than those from warm habitats.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, there is no overwhelming evidence of a peculiar role for DHA, or EPA, in homeoviscous adaptation. In addition to EPA and DHA, there are many other FAs with various number of double bonds and/or chain lengths, which could be responsible for the regulation of membrane fluidity and, thus, for temperature adaptation (Arts & Kohler, 2009;Dodson et al, 2014). For instance, 18:4n-3 and 20:4n-6 were found recently to be important for daphniids at low temperature (Masclaux et al, 2009;Martin-Creuzburg et al, 2012;Sperfeld & Wacker, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature

et al. 2014

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Summary We studied the fatty acid (FA) composition of six species of Cladocera and six species of Copepoda from five cold‐water lakes, situated in the tundra and/or in the mountains, and eight species of Cladocera and four species of Copepoda from eight warm‐water lakes (including one reservoir) in temperate regions. We asked whether the contrasting temperature would result primarily simply in changes in the percentages (i.e. percentage of total FAs) and absolute contents (quantities) of the long‐chain polyunsaturated fatty acids (PUFAs), eicosapentaenoic acid (20:5n‐3, EPA) and docosahexaenoic acid (22:6n‐3, DHA), or whether there are other FAs with various number of double bonds and/or chain lengths which could be responsible for a putative homeoviscous adaptation. We also aimed to reveal any consistent phylogenetic differences in FA percentages and contents between Cladocera and Copepoda, separable from any temperature effects. Both taxa in warm waters had greater percentages of 18:0, and lower percentages of 14:0 and 18:4n‐3, than in cold waters, but there were no differences in percentages of DHA. In addition, Cladocera, besides the lower percentage of EPA, had higher percentages of 20:0 and 22:0 in warm waters. These patterns in the percentages of 14:0, 18:0, 18:4n‐3, 20:0 and 22:0 are in a good agreement with the hypothesis of homeoviscous adaptation. Thus, the role of EPA, and particularly DHA, as unique regulators of the homeoviscous adaptation of the zooplankton may have been overestimated. Overall, we confirmed the known differences between Cladocera and Copepoda, namely higher percentages of EPA in Cladocera and higher percentages of DHA in Copepoda. However, there was c. 50% overlap in the ranges of the percentage of EPA in Cladocera and Copepoda, while the ranges in the content of EPA per unit organic carbon in Cladocera and Copepoda overlapped completely. Differences in the percentages and content of DHA between Cladocera and Copepoda were statistically significant and invariant with temperature, and therefore are probably due to phylogenetic factors, rather than any temperature adaptation. Contrasting temperature was not associated with significant differences in the contents of EPA and DHA per unit of organic carbon within the taxa studied. If this remained the case in a warming climate, such warming would be unlikely to reduce the accumulation of these important PUFAs in the zooplankton, at least if species composition was unchanged. However, if there were shifts in the proportions of Cladocera and Copepoda in the zooplankton, for example fewer copepods as temperature rises, a decrease of the flux of PUFA in the ecosystem is plausible, taking into account the phylogenetic (and temperature invariant) differences in DHA between the two groups.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature

et al. 2014

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“…However, a recent study reported the analysis of growth and fatty acids of P. tricornutum grown at 30 C [30].…”

Section: 2mentioning

confidence: 99%

Impact of temperature and light intensity on triacylglycerol accumulation in marine microalgae

Nogueira

Silva

Araújo

et al. 2015

Biomass and Bioenergy

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“…Temperature is a particularly important environmental condition for consideration because maintenance of an intact plastid membrane is crucial for photosynthetic activity, and high temperatures can have a negative effect on plastid membrane integrity [see Dodson et al . () and references therein]. Additionally, some corals have the potential to become bleached after prolonged exposure to elevated temperatures [see van Woesik et al .…”

Section: Introductionmentioning

confidence: 99%

Squishy lipids: Temperature effects on the betaine and galactolipid profiles of a C₁₈/C₁₈ peridinin‐containing dinoflagellate, Symbiodinium microadriaticum (Dinophyceae), isolated from the mangrove jellyfish, Cassiopea xamachana

Leblond

Khadka

Duong

et al. 2015

Phycological Research

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Summary Previous work from our laboratory has shown dinoflagellates, which possess the carotenoid peridinin, have been divided into two clusters based on plastid galactolipid fatty acid composition. In one cluster major forms of monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG), lipids that comprise the majority of photosynthetic membranes, were C18/C18 (sn‐1/sn‐2), with octadecapentaenoic [18:5(n‐3)] and octadecatetraenoic [18:4(n‐3)] acid as principal fatty acids. The other cluster contained C20/C18 major forms, with eicosapentaenoic acid [20:5(n‐3)] being the predominant sn‐1 fatty acid. In this study, we have found that Symbiodinium microadriaticum isolated from the jellyfish, Cassiopea xamachana, when grown at 30°C, produced MGDG and DGDG with a more saturated fatty acid, 18:4(n‐3), at the sn‐2 carbon than when grown at 20°C where 18:5(n‐3) predominates. This modulation of the sn‐2 fatty acid's level of saturation is mechanistically similar to what has been observed in Pyrocystis, a C20/C18 dinoflagellate. We have also examined the effect of growth temperature on the betaine lipid, diacylglycerylcarboxyhydroxymethylcholine (DGCC), which has been observed by others to be the predominant non plastidial polar lipid in dinoflagellates. Temperature effects on it were minimal, with very few modulations in fatty acid unsaturation as observed in MGDG and DGDG. Rather, the primary difference seen at the two growth temperatures was the alteration of the amount of minor forms of DGCC, as well as a second betaine lipid, diacylglyceryl‐N,N,N‐trimethylhomoserine.

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The long and short of it: temperature-dependent modifications of fatty acid chain length and unsaturation in the galactolipid profiles of the diatoms Haslea ostrearia and Phaeodactylum tricornutum

Cited by 42 publications

References 47 publications

Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature

Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature

Impact of temperature and light intensity on triacylglycerol accumulation in marine microalgae

Squishy lipids: Temperature effects on the betaine and galactolipid profiles of a C₁₈/C₁₈ peridinin‐containing dinoflagellate, Symbiodinium microadriaticum (Dinophyceae), isolated from the mangrove jellyfish, Cassiopea xamachana

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The long and short of it: temperature-dependent modifications of fatty acid chain length and unsaturation in the galactolipid profiles of the diatoms Haslea ostrearia and Phaeodactylum tricornutum

Cited by 42 publications

References 47 publications

Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature

Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature

Impact of temperature and light intensity on triacylglycerol accumulation in marine microalgae

Squishy lipids: Temperature effects on the betaine and galactolipid profiles of a C18/C18 peridinin‐containing dinoflagellate, Symbiodinium microadriaticum (Dinophyceae), isolated from the mangrove jellyfish, Cassiopea xamachana

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Squishy lipids: Temperature effects on the betaine and galactolipid profiles of a C₁₈/C₁₈ peridinin‐containing dinoflagellate, Symbiodinium microadriaticum (Dinophyceae), isolated from the mangrove jellyfish, Cassiopea xamachana