Acclimation Responses of Gracilaria sp. (Rhodophyta) and Enteromorpha intestinalis (Chlorophyta) to Changes in the External Inorganic Carbon Concentration
-
J. R. Andría
Abstract
The acclimation responses of two intertidal macroalgae, Gracilaria sp. and Enteromorpha intestinalis, to different dissolved inorganic carbon (DIC) levels were investigated under laboratory conditions. The effect of DIC availability on growth rate, biochemical composition (C, N, pigments and Rubisco) and on the degree of inhibition of external and total carbonic anhydrase activities (by acetazolamide and 6-ethoxyzolamide, respectively), and of a putative HCO3− exchanger protein (sensitive to the inhibitor 4,4′-diisothiocyanatostilbene-2,2′-disulfonate, DIDS) was species-specific. Pigment and Rubisco contents co-varied negatively with DIC availability in Gracilaria sp. However, no such pattern was observed in Enteromorpha intestinalis. The mechanisms of DIC uptake were also modulated by the external DIC concentration. Under limiting DIC conditions, the induction of mechanisms for CO2 acquisition above the diffusive rate was observed in Gracilaria sp., while a repression of the DIDS-sensitive mechanism was obtained for Enteromorpha intestinalis. The results revealed the plasticity of these intertidal macroalgae to acclimate to different ambient DIC levels, and indicate the important role of DIC as a factor controlling biochemical and physiological processes.
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
Articles in the same Issue
- Biomass and Production of the Epiphytes on the Leaves of Cymodocea nodosa in the Canary Islands
- Growth, Tetrasporogenesis, and Life History in Culture of Caulacanthus okamurae (Gigartinales, Rhodophyta) from Korea
- Koorchaloma spartinicola sp. nov., a new marine sporodochial fungus from Spartina alterniflora
- Preliminary Studies on the Growth of Selected ‘Green Tide’ Algae in Laboratory Culture: Effects of Irradiance, Temperature, Salinity and Nutrients on Growth Rate
- Dasya puertoricensis sp. nov. (Dasyaceae, Rhodophyta) from Puerto Rico, Caribbean Sea
- Growth of Fucus vesiculosus L. (Phaeophyta) in the Northern Baltic Proper: Energy and Nitrogen Storage in Seasonal Environment
- Notes on New Records of Red Algae from the Colombian Caribbean
- Acclimation Responses of Gracilaria sp. (Rhodophyta) and Enteromorpha intestinalis (Chlorophyta) to Changes in the External Inorganic Carbon Concentration
- The Effects of Light and Temperature on Different Phases of the Life Cycle in the Carrageenan Producing Alga Chondracanthus chamissoi (Rhodophyta, Gigartinales)
- Identification of Some Easily Confused Common Diatom Species in Arctic Spring Blooms
- Checklist of the Benthic Marine Plants of the Madeira Archipelago
Articles in the same Issue
- Biomass and Production of the Epiphytes on the Leaves of Cymodocea nodosa in the Canary Islands
- Growth, Tetrasporogenesis, and Life History in Culture of Caulacanthus okamurae (Gigartinales, Rhodophyta) from Korea
- Koorchaloma spartinicola sp. nov., a new marine sporodochial fungus from Spartina alterniflora
- Preliminary Studies on the Growth of Selected ‘Green Tide’ Algae in Laboratory Culture: Effects of Irradiance, Temperature, Salinity and Nutrients on Growth Rate
- Dasya puertoricensis sp. nov. (Dasyaceae, Rhodophyta) from Puerto Rico, Caribbean Sea
- Growth of Fucus vesiculosus L. (Phaeophyta) in the Northern Baltic Proper: Energy and Nitrogen Storage in Seasonal Environment
- Notes on New Records of Red Algae from the Colombian Caribbean
- Acclimation Responses of Gracilaria sp. (Rhodophyta) and Enteromorpha intestinalis (Chlorophyta) to Changes in the External Inorganic Carbon Concentration
- The Effects of Light and Temperature on Different Phases of the Life Cycle in the Carrageenan Producing Alga Chondracanthus chamissoi (Rhodophyta, Gigartinales)
- Identification of Some Easily Confused Common Diatom Species in Arctic Spring Blooms
- Checklist of the Benthic Marine Plants of the Madeira Archipelago
