Effects of CO2 and nitrogen supply on the biochemical composition of Ulva rigida with especial emphasis on lipid class analysis

Gordillo, Francisco J. L.; Jiménez, Carlos; Goutx, Madeleine; Niell, Xavier

doi:10.1078/0176-1617-00209

Cited by 47 publications

(34 citation statements)

References 35 publications

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“…the sum of all sterols found in one species, was low when phosphorus or silicate supply in the medium was low. A comparable decrease in total sterol concentration was observed by Gordillo et al (2001) in the nitrogen-limited macroalga Ulva rigida, compared with a nitrogensufficient treatment. Thus, an experimentally induced limitation of aquatic primary producers by phosphorus, silicate and nitrogen consistently results in the same response -a decrease in total sterol concentrations -which suggests that nutrient limitation in general impairs the synthesis of sterols in algae.…”

Section: Discussionmentioning

confidence: 52%

Phytoplankton sterol contents vary with temperature, phosphorus and silicate supply: a study on three freshwater species

Piepho

Martin‐Creuzburg

Wacker

2012

European Journal of Phycology

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The understanding of environmentally induced changes in the biochemical composition of phytoplankton species is of great importance in both physiological studies and ecological food web research. In extensive laboratory experiments we tested the influence of two different temperatures (10 C and 25 C) and a phosphorus supply gradient on the sterol concentrations of the three freshwater phytoplankton species Scenedesmus quadricauda, Cryptomonas ovata and Cyclotella meneghiniana. The diatom C. meneghiniana was additionally exposed to a silicate gradient. In two separate experiments we analysed (1) possible interactive effects of temperature and phosphorus supply and (2) the effect of four phosphorus levels and three silicate levels on algal sterol concentrations. We observed that sterol concentrations were higher at 25 C than at 10 C in S. quadricauda and C. meneghiniana, but were not affected by temperature in C. ovata. Interactive effects of temperature and phosphorus supply on sterol concentrations were found in C. meneghiniana. This presumably was due to the bioconversion of one sterol (24-methylenecholesterol) into another (22-dihydrobrassicasterol). Increasing phosphorus supply resulted in species-specific effects on sterol concentrations, viz. an optimum curve response in S. quadricauda, a saturation curve response in C. meneghiniana and no change in sterol concentration in C. ovata. Effects of silicate supply on the sterols of C. meneghiniana equalled the effects of phosphorus supply. Albeit we did not observe a general trend in the three phytoplankton species tested, we conclude that sterol concentrations of phytoplankton are strongly affected by temperature and nutrient supply. Interactive effects point out the importance of taking into account more than just one environmental factor when assessing the effects of environmentally induced changes on phytoplankton sterol concentrations.

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Section: Discussionmentioning

confidence: 52%

Phytoplankton sterol contents vary with temperature, phosphorus and silicate supply: a study on three freshwater species

Piepho

Martin‐Creuzburg

Wacker

2012

European Journal of Phycology

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“…Although it is possible that some of the spatial variability of fatty acids in a species is caused by genotypic differentiation (Robinson et al 2013), variation is generally linked to the environment, including changes in light (Hotimchenko 2002), salinity , and in particular nutrient availability (Gómez and Wiencke 1998;Gordillo et al 2001) and water temperature (Al-Hasan et al 1991;Floreto et al 1993). The degree and direction of seasonal variation in the content and composition of fatty acids are species-specific (Schmid et al 2014) and may also be related to plant size and the life history stages of individuals (Gerasimenko et al 2010;Honya et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Spatial, seasonal, and within-plant variation in total fatty acid content and composition in the brown seaweeds Dictyota bartayresii and Dictyopteris australis (Dictyotales, Phaeophyceae)

et al. 2014

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We investigated the spatial, seasonal, and withinplant variation in total fatty acids (TFA) and fatty acid (FA) composition in the brown seaweeds Dictyota bartayresii sampled from Nelly Bay, Orpheus Island, and Kissing Point (Northern Queensland, Australia) and Dictyopteris australis sampled from Nelly Bay. Both species were present year round, but with no consistent seasonal pattern in plant size, and had an annualized mean content of TFA of 5 % dry weight (dw) that is among the highest recorded for seaweeds. For Dictyota, larger plants had a higher content of TFA and a higher proportion of polyunsaturated omega-3 FA (PUFA(n-3)) than smaller plants, while for Dictyopteris, the TFA content and the proportion of PUFA(n-3) were unrelated to plant size. TFA in Dictyota varied considerably between locations (~40 %) (3.5-5.5 % dw) and to a lesser degree between seasons (~10 %) with a lower content of TFA and higher proportion of PUFA(n-3) in winter. Dictyopteris had añ 10 % higher content of TFA in winter but with no seasonal pattern in the composition of FA. There was also within-plant variation in FA, as TFA decreased from the tips toward the base in both species, and in Dictyopteris, the tips had a higher proportion of saturated FA (SFA) and PUFA(n-3) than the base. The presence of site-and species-specific variation in the content and composition of fatty acids reinforces the need for detailed analyses of the biochemical profile of seaweed biomass, including their extracts or purified compounds, if the focus is nutritional applications based on lipids.

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“…This is in contrast to many species of microalgae [22,56] where the depletion of nitrogen leads to increases in the content of TFA (or total lipids) through increased production of TAG. However, there appears to be no general trend as the content of TFA decreases with nitrogen depletion in some species of microalgae [22] and lipid increases induced by nitrogen depletion have only rarely been observed in seaweeds [19]. This inconsistency between species and studies can be related to interactions with other environmental factors such as light [8] or carbon availability [19] and associated heterogeneous responses to nitrogen depletion.…”

Section: Total Fatty Acid Content and Fatty Acid Compositionmentioning

confidence: 94%

“…While there is extensive literature on environmental effects on the content and composition of fatty acids in microalgae [7,8], research on seaweeds is largely restricted to field studies based on broad environmental correlations with fatty acids [9][10][11][12] and only a few studies in a limited number of species have experimentally quantified the effects of temperature [13,14] and light [15,16] on fatty acids. Additionally, while the effect of nitrogen starvation can lead to substantial increases in content and composition of PUFA(n-3) in microalgae [17], the quantification of the effects of nitrogen availability on the content and composition of fatty acids in seaweeds is restricted to a few species of Ulva [18][19][20] and Gracilaria [21]. Importantly, the direction and degree of these effects for microalgae and macroalgae are species specific [19,21,22] and environmental conditions often have opposing effects on growth and the content and composition of fatty acids [19,22], and so may result in highly specific net changes in fatty acid productivity.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, while the effect of nitrogen starvation can lead to substantial increases in content and composition of PUFA(n-3) in microalgae [17], the quantification of the effects of nitrogen availability on the content and composition of fatty acids in seaweeds is restricted to a few species of Ulva [18][19][20] and Gracilaria [21]. Importantly, the direction and degree of these effects for microalgae and macroalgae are species specific [19,21,22] and environmental conditions often have opposing effects on growth and the content and composition of fatty acids [19,22], and so may result in highly specific net changes in fatty acid productivity.…”

Section: Introductionmentioning

confidence: 99%

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Environmental effects on growth and fatty acids in three isolates of Derbesia tenuissima (Bryopsidales, Chlorophyta)

et al. 2015

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Effects of CO2 and nitrogen supply on the biochemical composition of Ulva rigida with especial emphasis on lipid class analysis

Cited by 47 publications

References 35 publications

Phytoplankton sterol contents vary with temperature, phosphorus and silicate supply: a study on three freshwater species

Phytoplankton sterol contents vary with temperature, phosphorus and silicate supply: a study on three freshwater species

Spatial, seasonal, and within-plant variation in total fatty acid content and composition in the brown seaweeds Dictyota bartayresii and Dictyopteris australis (Dictyotales, Phaeophyceae)

Environmental effects on growth and fatty acids in three isolates of Derbesia tenuissima (Bryopsidales, Chlorophyta)

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