scholarly journals Inorganic Carbon Accumulation and Photosynthesis in a Blue-green Alga as a Function of External pH

1981 ◽  
Vol 67 (5) ◽  
pp. 917-921 ◽  
Author(s):  
John R. Coleman ◽  
Brian Colman
Keyword(s):  
Green Alga ◽  
Inorganic Carbon ◽  
Carbon Accumulation ◽  
Blue Green Alga ◽  
External Ph

Algal Competition for Phosphorus: The Influence of Zooplankton and Fish

1986 ◽  
Vol 43 (6) ◽  
pp. 1135-1141 ◽  
Author(s):  
Helge Reinertsen ◽  
Arne Jensen ◽  
Arnfinn Langeland ◽  
Yngvar Olsen
Keyword(s):  
Interspecific Competition ◽  
Green Alga ◽  
Inorganic Carbon ◽  
Blue Green Alga ◽  
Physical Conditions ◽  
Herbivorous Zooplankton ◽  
Enclosure Experiments ◽  
Algal Competition

Interspecific competition for phosphorus between the blue-green alga Anabaena flos-aquae and the green alga Staurastrum luetkemuelleri was studied in enclosure experiments. Both algal populations increased in number upon introduction of fish, but addition of herbivorous zooplankton led to an increase solely in the Staurastrum population. This could not be attributed to grazing by zooplankton, chemical or physical conditions (light, pH, inorganic carbon), or the total supply or rate of supply of phosphorus. The observed differences were apparently due to the patchy release of phosphorus by the fish, and the more homogenous release of this nutrient by the zooplankton. This would allow the Anabaena species, which was capable of rapid uptake of temporary pulses of phosphate, to coexist with Staurastrum in the enclosures with fish.

scholarly journals Acclimation of Photosynthetic Light Reactions during Induction of Inorganic Carbon Accumulation in the Green Alga Chlamydomonas reinhardtii

1990 ◽  
Vol 94 (1) ◽  
pp. 357-366 ◽  
Author(s):  
Kristin Palmqvist ◽  
Lars-Göran Sundblad ◽  
Gunnar Wingsle ◽  
Göran Samuelsson
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Green Alga ◽  
Inorganic Carbon ◽  
Carbon Accumulation

Effect of Iron Limitation on the Ultrastructure of Agmenellum Quadruplicatum

1981 ◽  
Vol 39 ◽  
pp. 410-411
Author(s):  
L. P. Hardie ◽  
D. L. Balkwill ◽  
S. E. Stevens
Keyword(s):  
Growth Medium ◽  
Green Alga ◽  
Natural Habitat ◽  
Iron Limitation ◽  
Natural Environments ◽  
Blue Green Alga ◽  
Marine Cyanobacterium ◽  
Natural Systems ◽  
Thin Sectioning ◽  
Agmenellum Quadruplicatum

Agmenellum quadruplicatum is a unicellular, non-nitrogen-fixing, marine cyanobacterium (blue-green alga). The ultrastructure of this organism, when grown in the laboratory with all necessary nutrients, has been characterized thoroughly. In contrast, little is known of its ultrastructure in the specific nutrient-limiting conditions typical of its natural habitat. Iron is one of the nutrients likely to limit this organism in such natural environments. It is also of great importance metabolically, being required for both photosynthesis and assimilation of nitrate. The purpose of this study was to assess the effects (if any) of iron limitation on the ultrastructure of A. quadruplicatum. It was part of a broader endeavor to elucidate the ultrastructure of cyanobacteria in natural systemsActively growing cells were placed in a growth medium containing 1% of its usual iron. The cultures were then sampled periodically for 10 days and prepared for thin sectioning TEM to assess the effects of iron limitation.

Effects of amino acids on the blue-green alga (cyanobacteria) Tolypothrix scytonemoides (Gardner) Geitler

2006 ◽  
Vol 8 (3) ◽  
pp. 286-293
Author(s):  
Uma Maheshwari Rajendran ◽  
Elango Kathirvel ◽  
Anand Narayanaswamy
Keyword(s):  
Amino Acids ◽  
Green Alga ◽  
Blue Green Alga

scholarly journals Uridine Diphosphate Galacturonate 4-Epimerase from the Blue-Green Alga Anabaena flos-aquae

1974 ◽  
Vol 249 (8) ◽  
pp. 2366-2372
Author(s):  
Mary A. Gaunt ◽  
Utpalendu S. Maitra ◽  
Helmut Ankel
Keyword(s):  
Green Alga ◽  
Uridine Diphosphate ◽  
Blue Green Alga

scholarly journals The molecular identity of the characean OH− transporter: a candidate related to the SLC4 family of animal pH regulators

PROTOPLASMA ◽  
2021 ◽  
Author(s):  
Bianca N. Quade ◽  
Mark D. Parker ◽  
Marion C. Hoepflinger ◽  
Shaunna Phipps ◽  
Mary A. Bisson ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Membrane Conductance ◽  
Resting Potential ◽  
Large Scatter ◽  
Intrinsic Variability ◽  
Molecular Identity ◽  
Ph Banding ◽  
Chara Australis ◽  
Ph Increase ◽  
External Ph

AbstractCharaceae are closely related to the ancient algal ancestors of all land plants. The long characean cells display a pH banding pattern to facilitate inorganic carbon import in the acid zones for photosynthetic efficiency. The excess OH−, generated in the cytoplasm after CO2 is taken into the chloroplasts, is disposed of in the alkaline band. To identify the transporter responsible, we searched the Chara australis transcriptome for homologues of mouse Slc4a11, which functions as OH−/H+ transporter. We found a single Slc4-like sequence CL5060.2 (named CaSLOT). When CaSLOT was expressed in Xenopus oocytes, an increase in membrane conductance and hyperpolarization of resting potential difference (PD) was observed with external pH increase to 9.5. These features recall the behavior of Slc4a11 in oocytes and are consistent with the action of a pH-dependent OH−/H+ conductance. The large scatter in the data might reflect intrinsic variability of CaSLOT transporter activation, inefficient expression in the oocyte due to evolutionary distance between ancient algae and frogs, or absence of putative activating factor present in Chara cytoplasm. CaSLOT homologues were found in chlorophyte and charophyte algae, but surprisingly not in related charophytes Zygnematophyceae or Coleochaetophyceae.

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