The availability of dissolved organic phosphorus compounds to marine phytoplankton

1995 ◽  
Vol 13 (2) ◽  
pp. 169-176 ◽  
Author(s):  
Hong Hua-sheng ◽  
Wang Hai-li ◽  
Huang Bang-qin
Keyword(s):  
Organic Phosphorus ◽  
Marine Phytoplankton ◽  
Phosphorus Compounds ◽  
Dissolved Organic Phosphorus

scholarly journals Non-Conventional Metal Ion Cofactor Requirement of Dinoflagellate Alkaline Phosphatase and Translational Regulation by Phosphorus Limitation

2019 ◽  
Vol 7 (8) ◽  
pp. 232 ◽  
Author(s):  
Xin Lin ◽  
Chentao Guo ◽  
Ling Li ◽  
Tangcheng Li ◽  
Senjie Lin
Keyword(s):  
Alkaline Phosphatase ◽  
Metal Ion ◽  
Translational Regulation ◽  
Organic Phosphorus ◽  
Niche Differentiation ◽  
Phosphorus Limitation ◽  
Marine Phytoplankton ◽  
Phosphate Limitation ◽  
Dissolved Organic Phosphorus ◽  
Metal Cofactor

Alkaline phosphatase (AP) enables marine phytoplankton to utilize dissolved organic phosphorus (DOP) when dissolved inorganic phosphate (DIP) is depleted in the ocean. Dinoflagellate AP (Dino-AP) represents a newly classified atypical type of AP, PhoAaty. Despite While being a conventional AP, PhoAEC is known to recruit Zn2+ and Mg2+ in the active center, and the cofactors required by PhoAaty have been contended and remain unclear. In this study, we investigated the metal ion requirement of AP in five dinoflagellate species. After AP activity was eliminated by using EDTA to chelate metal ions, the enzymatic activity could be recovered by the supplementation of Ca2+, Mg2+ and Mn2+ in all cases but not by that of Zn2+. Furthermore, the same analysis conducted on the purified recombinant ACAAP (AP of Amphidinium carterae) verified that the enzyme could be activated by Ca2+, Mg2+, and Mn2+ but not Zn2+. We further developed an antiserum against ACAAP, and a western blot analysis using this antibody showed a remarkable up-regulation of ACAAP under a phosphate limitation, consistent with elevated AP activity. The unconventional metal cofactor requirement of Dino-AP may be an adaptation to trace metal limitations in the ocean, which warrants further research to understand the niche differentiation between dinoflagellates and other phytoplankton that use Zn–Mg AP in utilizing DOP.

scholarly journals On changes taking place in sea water during storage

1941 ◽  
Vol 25 (2) ◽  
pp. 225-233 ◽  
Author(s):  
H. W. Harvey
Keyword(s):  
Solid Surface ◽  
Rapid Growth ◽  
Sea Water ◽  
Organic Phosphorus ◽  
Phosphorus Compounds ◽  
Dissolved Organic Phosphorus ◽  
Growth Of Bacteria

The rapid growth of bacteria when sea water is stored in glass vessels, and the possibility that this is brought about by the concentration of food by adsorption on the solid surface, are discussed. Some evidence is presented bearing upon such adsorption.The regeneration of phosphate from dissolved organic phosphorus compounds in the sea and in stored water is considered.

scholarly journals The Utilization of Organic Phosphorus by Phytoplankton

1946 ◽  
Vol 26 (3) ◽  
pp. 285-295 ◽  
Author(s):  
S. P. Chu
Keyword(s):  
Sea Water ◽  
Organic Phosphorus ◽  
Skeletonema Costatum ◽  
Marine Organisms ◽  
Phosphorus Compounds ◽  
Dissolved Organic Phosphorus ◽  
Nitzschia Closterium ◽  
Phaeocystis Pouchetii ◽  
Better Than

Cultural experiments were made with marine organisms in enriched crude sea water and in bacteria-free cultures with the phosphorus supplied in different forms. It was found that pyrophosphate cannot be utilized as a source of phosphorus as effectively as orthophosphate by the organisms cultured, i.e. Phaeocystis Pouchetii, Skeletonema costatum and Nitzschia closterium. Growth of Phaeocystis Pouchetii was a little better and lasted longer when phytin was supplied to natural sea water as a source of phosphorus than when orthophosphate was supplied. Phytin can also support a growth of Skeletonema costatum and Nitzschia closterium as good as, or a little better than, orthophosphate.The organic phosphorus compounds used in these experiments were found to be broken down into orthophosphate in natural sea water. In bacteria-free cultures phytin and glycerophosphoric acid can be effectively used as such by Nitzschia closterium forma minutissima as a source of phosphorus, while sodium nucleinate and lecithin can not be effectively used as such. The organic phosphorus dissolved out from the blades of Laminaria can also be utilized by this diatom as effectively as orthophosphorus.It would seem, therefore, that not only the dissolved orthophosphate as generally assumed, but the dissolved organic phosphorus in the sea may also be absorbed and utilized by plants.

Dissolved Organic Phosphorus Compounds: Do They Satisfy Planktonic Phosphate Demand in Summer?

1986 ◽  
Vol 43 (2) ◽  
pp. 343-350 ◽  
Author(s):  
Robert T. Heath
Keyword(s):  
Uptake Rate ◽  
Phosphate Uptake ◽  
Organic Phosphorus ◽  
Open Water ◽  
Eutrophic Lake ◽  
Phosphorus Compounds ◽  
Savannah River ◽  
Dissolved Organic Phosphorus ◽  
Western Basin ◽  
Nitrophenyl Phosphate

The rate of release of phosphate from dissolved organic phosphorus (DOP) compounds generally accounted for <1% of the phosphate uptake rate by seston in the open water of five diverse freshwater systems in summer. Surface water samples were taken during July and August 1984 from a eutrophic lake (East Twin Lake, OH), an acid bog lake (Triangle Bog Lake, OH), a freshwater estuarine marsh that empties into the western basin of Lake Erie (Old Woman Creek, OH), and two large mainstem reservoirs on the Savannah River (R. B. Russel Reservoir and Clarks Hill Lake, GA). In each of these, phosphatase hydrolysable phosphomonoesters (PME) often were the major fraction of DOP; phosphate release from photosensitive DOP was not detected in any of these systems at this time. The rate of release of phosphate from PME was calculated from Michaelis–Menten kinetics, and phosphatase activity was estimated spectrophotometrically using p-nitrophenyl phosphate as a model substrate. Radiometric analysis of the rate of phosphate uptake by seston showed that phosphate was sorbed to seston by at least two different processes. The total uptake rate by all uptake processes exhibited an apparent first-order dependence on the concentration of available phosphate. Typically, the velocity of uptake was 1–10 nmol∙L−1∙min−1, and the velocity of release from PME was 0.01–0.06 nmol∙L−1∙min−1.

scholarly journals The Rate of Liberation of Phosphate in Sea Water by the Breakdown of Plankton Organisms

1935 ◽  
Vol 20 (2) ◽  
pp. 197-200 ◽  
Author(s):  
L. H. N. Cooper
Keyword(s):  
Sea Water ◽  
Organic Phosphorus ◽  
Time Lag ◽  
Phosphorus Compounds ◽  
Phosphate Content ◽  
Dissolved Organic Phosphorus ◽  
Short Time

Samples of animal and plant plankton were added to sea water in glass vessels and the subsequent changes in the phosphate content of the water were followed.The breakdown of the zooplankton was very rapid and more phosphate was set free than had originally been added as plankton. The balance was produced from dissolved organic phosphorus compounds in the water. The breakdown of phytoplankton showed a short time lag and only a part of the phosphorus added was set free as phosphate.

scholarly journals Concentrations and Uptake of Dissolved Organic Phosphorus Compounds in the Baltic Sea

2018 ◽  
Vol 5 ◽  
Author(s):  
Monika Nausch ◽  
Eric P. Achterberg ◽  
Lennart T. Bach ◽  
Corinna P. D. Brussaard ◽  
Katharine J. Crawfurd ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Organic Phosphorus ◽  
Phosphorus Compounds ◽  
The Baltic Sea ◽  
Dissolved Organic Phosphorus ◽  
The Baltic
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