Acclimation Responses of Gracilaria sp. (Rhodophyta) and Enteromorpha intestinalis (Chlorophyta) to Changes in the External Inorganic Carbon Concentration

Andría, Jesús R.; Brun, Fernando G.; Pérez‐Lloréns, José Lucas; Vergara, Juan J.

doi:10.1515/bot.2001.046

Cited by 36 publications

(21 citation statements)

References 35 publications

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“…For the two kelps studied here, in the midterm (days, second half of the experimental period) CO 2 was the prevailing factor conditioning eCA values, indicating that stimulation by UVR was short-lasting and disappeared once acclimation to UVR took place. One of the most commonly observed effects of increased CO 2 on aquatic primary producers is the inhibition of the enzymes related to CCMs (Gordillo et al, 2001;Andría et al, 2001;Israel and Hophy, 2002). It is particularly relevant that high CO 2 did not inhibit eCA activity until day 6 of culture, indicating that the decrease might be related to an acclimation of photosynthesis and C metabolism rather than a direct action of CO 2 on eCA expression (usually taking hours, not days, e.g.…”

Section: Discussionmentioning

confidence: 99%

Ocean acidification modulates the response of two Arctic kelps to ultraviolet radiation

Gordillo

Aguilera

Wiencke

et al. 2015

Journal of Plant Physiology

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Section: Discussionmentioning

confidence: 99%

Ocean acidification modulates the response of two Arctic kelps to ultraviolet radiation

Gordillo

Aguilera

Wiencke

et al. 2015

Journal of Plant Physiology

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“…As shown in previous studies, a total of 10 days of exposure to different CO 2 concentrations (3 days of pre-incubation ? 7 days of incubation) would be enough time for acclimation in seaweeds (Mercado et al 1999;Andría et al 2001;Zou 2005). Experiments were carried out in a temperature-controlled room (4 ± 0.5°C) with a 20:4 h light:dark photoperiod (as a proxy to conditions in the collection site), using 1.5-L perspex cylinders with 0.2-lm-filtered natural seawater (FSW) enriched with nutrients, following a modified, buffer-free recipe of Provasoli (1968).…”

Section: Methodsmentioning

confidence: 99%

Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta

et al. 2015

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Ocean acidification affects with special intensity Arctic ecosystems, being marine photosynthetic organisms a primary target, although the consequences of this process in the carbon fluxes of Arctic algae are still unknown. The alteration of the cellular carbon balance due to physiological acclimation to an increased CO 2 concentration (1300 ppm) in the common Arctic brown seaweeds Desmarestia aculeata and Alaria esculenta from Kongsfjorden (Svalbard) was analysed. Growth rate of D. aculeata was negatively affected by CO 2 enrichment, while A. esculenta was positively affected, as a result of a different reorganization of the cellular carbon budget in both species. Desmarestia aculeata showed increased respiration, enhanced accumulation of storage biomolecules and elevated release of dissolved organic carbon, whereas A. esculenta showed decreased respiration and lower accumulation of storage biomolecules. Gross photosynthesis (measured both as O 2 evolution and 14 C fixation) was not affected in any of them, suggesting that photosynthesis was already saturated at normal CO 2 conditions and did not participate in the acclimation response. However, electron transport rate changed in both species in opposite directions, indicating different energy requirements between treatments and species specificity. High CO 2 levels also affected the N-metabolism, and 13 C isotopic discrimination values from algal tissue pointed to a deactivation of carbon concentrating mechanisms. Since increased CO 2 has the potential to modify physiological mechanisms in different ways in the species studied, it is expected that this may lead to changes in the Arctic seaweed community, which may propagate to the rest of the food web.

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“…A high pCO 2 can cause the downregulation of enzymes involved in carbon assimilation (Giordano et al 2005), which in turn can lower the algal protein, and/or N-content in some red and green macroalgae species (Andría et al 2001; Gordillo et al 2001a, b). Under nutrient replete conditions, these changes can be reflected in a higher C/N-ratio and can be accompanied by insignificant changes in the contents of soluble carbohydrates and lipids (Gordillo et al 2001b).…”

Section: Introductionmentioning

confidence: 99%

Biochemical composition of temperate and Arctic populations of Saccharina latissima after exposure to increased pCO2 and temperature reveals ecotypic variation

Olischläger

Iñíguez

Gordillo

et al. 2014

Planta

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Previous research suggested that the polar and temperate populations of the kelp Saccharina latissima represent different ecotypes. The ecotypic differentiation might also be reflected in their biochemical composition (BC) under changing temperatures and pCO2. Accordingly, it was tested if the BC of Arctic (Spitsbergen) and temperate S. latissima (Helgoland) is different and if they are differently affected by changes in temperature and pCO2. Thalli from Helgoland grown at 17 °C and 10 °C and from Spitsbergen at 10 °C and 4 °C were all tested at either 380, 800, or 1,500 µatm pCO2, and total C-, total N-, protein, soluble carbohydrate, and lipid content, as well as C/N-ratio were measured. At 10 °C, the Arctic population had a higher content of total C, soluble carbohydrates, and lipids, whereas the N- and protein content was lower. At the lower tested temperature, the Arctic ecotype had particularly higher contents of lipids, while content of soluble carbohydrates increased in the Helgoland population only. In Helgoland-thalli, elevated pCO2 caused a higher content of soluble carbohydrates at 17 °C but lowered the content of N and lipids and increased the C/N-ratio at 10 °C. Elevated pCO2 alone did not affect the BC of the Spitsbergen population. Conclusively, the Arctic ecotype was more resilient to increased pCO2 than the temperate one, and both ecotypes differed in their response pattern to temperature. This differential pattern is discussed in the context of the adaptation of the Arctic ecotype to low temperature and the polar night.

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Acclimation Responses of Gracilaria sp. (Rhodophyta) and Enteromorpha intestinalis (Chlorophyta) to Changes in the External Inorganic Carbon Concentration

Cited by 36 publications

References 35 publications

Ocean acidification modulates the response of two Arctic kelps to ultraviolet radiation

Ocean acidification modulates the response of two Arctic kelps to ultraviolet radiation

Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta

Biochemical composition of temperate and Arctic populations of Saccharina latissima after exposure to increased pCO2 and temperature reveals ecotypic variation

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