spirodela polyrhiza/phosphatase

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Changes in phosphatase activity in phosphorus-deficient Spirodela.

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Onset of phosphorus deficiency in Spirodela oligorrhiza was accompanied by a 50-fold increase in phosphatase activity of cell extracts. The enzyme behaved like other plant acid phosphatase, and was both inhibited and repressed by inorganic phosphate. The phosphatase activity comprised at least three

Metabolic relations of inositol 3,4,5,6-tetrakisphosphate revealed by cell permeabilization. Identification of inositol 3,4,5, 6-tetrakisphosphate 1-kinase and inositol 3,4,5,6-tetrakisphosphate phosphatase activities in mesophyll cells.

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Using a permeabilization strategy to introduce Ins(3,4,5,6) P(4) into mesophyll protoplasts of Commelina communis, we have identified Ins(3,4,5,6) P(4) 1-kinase activity in mesophyll cells. Multiple InsP(3) isomers were identified in Spirodela polyrhiza and Arabidopsis. Only two of these, Ins(1,2,3)

Purification and partial characterization of an acid phosphatase from Spirodela oligorrhiza and its affinity for selected organophosphate pesticides.

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An acid phosphatase from the aquatic plant Spirodela oligorrhiza (duckweed) was isolated by fast protein liquid chromatography and partially characterized. The enzyme was purified 1871-fold with a total yield of 40%. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) of the pure

Evidence for a glycosylinositolphospholipid-anchored alkaline phosphatase in the aquatic plant Spirodela oligorrhiza.

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Glycosylphosphatidylinositol (GPI)-anchored proteins occur widely, perhaps universally, on the surface of animal cells, where they perform a variety of important functions. However, the existence of GPI-anchored proteins on plant cells has never been established. Evidence is presented in this

Cloning and characterization of cDNA of the GPI-anchored purple acid phosphatase and its root tissue distribution in Spirodela oligorrhiza.

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A cDNA clone of the glycosylphosphatidylinositol (GPI)-anchored purple acid phosphatase (PAP) has been obtained by a combination of cDNA library screening and 5' rapid amplification of cDNA ends from Spirodela oligorrhiza plants grown under phosphate-deficient (-P) conditions. The open reading frame

The glycosylphosphatidylinositol-anchored phosphatase from Spirodela oligorrhiza is a purple acid phosphatase.

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We recently presented clear evidence that the major low-phosphate-inducible phosphatase of the duckweed Spirodela oligorrhiza is a glycosylphosphatidylinositol (GPI)-anchored protein, and, to our knowledge, is the first described from higher plants (N. Morita, H. Nakazato, H. Okuyama, Y. Kim, G.A.

Light induces phosphorylation of glucan water dikinase, which precedes starch degradation in turions of the duckweed Spirodela polyrhiza.

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Degradation of storage starch in turions, survival organs of Spirodela polyrhiza, is induced by light. Starch granules isolated from irradiated (24 h red light) or dark-stored turions were used as an in vitro test system to study initial events of starch degradation. The starch-associated pool of

The influence of microcystin-LR and hepatotoxic cyanobacterial extract on the water plant Spirodela oligorrhiza.

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The eutrophication of the Sulejów Reservoir dam in Poland is related to toxicity from cyanobacterial blooms. The main species responsible for hepatotoxic bloom formation is Microcystis aeruginosa. The aim of this study was to evaluate the influence of toxic cyanobacterial extract on the growth and

Vermicomposting of duckweed (Spirodela polyrhiza) by employing Eisenia fetida: Changes in nutrient contents, microbial enzyme activities and earthworm biodynamics

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This study investigated the vermicomposting of duckweed (DW) mixed with cow dung in 25 (T₂₅), 50 (T₅₀), 75 (T₇₅), 100% (T₁₀₀) ratio using Eisenia fetida under a 35 d trail. Decrease in pH, organic carbon (33.54-38.25%), C/N ratio (43.6-56.6%), but increase

Evidence for substrate-cycling of 3-, 3,4-, 4-, and 4,5-phosphorylated phosphatidylinositols in plants.

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Short-term 32P labelling and enzymic dissection of inositol phospholipids was used to study the turnover of 3-, 3,4-, 4-, and 4,5-phosphorylated phosphatidylinositols in the plant Spirodela polyrhiza L. Analysis of label in the whole headgroup reveals that phosphatidylinositol 3- and

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