scholarly journals Porównanie aktywności peroksydazy, katalazy i fosfatazy kwaśnej w liściach pora w okresie intensywnego wzrostu i pod koniec wegetacji roślin w rożnych warunkach uprawy [Dynamics of the changes of peroxidase, catalase, and acid phosphatase activities in leeks under the influence of nitrogen fertilization and irrigation]

2015 ◽  
Vol 32 (2) ◽  
pp. 207-221
Author(s):  
E. Gurgul ◽  
E. Kołota ◽  
D. Ściążko
Keyword(s):  
Acid Phosphatase ◽  
Plant Growth ◽  
Phosphatase Activity ◽  
Peroxidase Activity ◽  
Nitrogen Fertilization ◽  
Acid Phosphatase Activity ◽  
Growth Stage ◽  
Large Degree ◽  
Growth And Yield ◽  
High Influence

Results obtained in a field experiment showed a high influence of irrigation and nitrogen fertilization on the activity of peroxidase, while acid phosphatase activity showed only small differences. The peroxidase activity depended to a large degree on the leeks growth stage. Maximum peroxidase, catalase and - in some cases – acid phosphatase activity were found at nitrogen doses higher than optimal for the plant growth and yield.

scholarly journals The effect of water and salt stresses on the phosphorus content and acid phosphatase activity in oilseed rape

2014 ◽  
Vol 58 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Stanisław Flasiński ◽  
Ryszard Zamorski ◽  
Urszula Kotowska
Keyword(s):  
Enzyme Activity ◽  
Salt Stress ◽  
Acid Phosphatase ◽  
Water Stress ◽  
Plant Growth ◽  
Phosphatase Activity ◽  
Oilseed Rape ◽  
Acid Phosphatase Activity ◽  
Phosphorus Content ◽  
Young Leaves

Oilseed rape plants responded to water and salt stresses (-0.5 MPa, PEG 6000 and NaCI) by reduction of the fresh and dry weights of shoots and roots. When PEG was used, the ratio of dry weights of roots:shoots surpassed that of controls. The leaf protein content increased considerably. The phosphorus content decreased only in the roots, most significantly after three days of stress. Immediately after the stresses were induced, an increase in the acid phosphatase (AP) activity was noted. Water and salt stresses caused four- and two-fold increases in AP activity in leaves, respectively. Changes in the enzyme activity were negligible in stems and roots. There are nine forms of AP in young leaves of oilseed rape. In the stressed plants, from No. 5 revealed lower activity and forms Nos 8 and 9, higher activities than in the control. The increase in AP activity was directly accompanied by the decrease in the water potential of the tissues. Oilseed rape is considerably less sensitive to salt stress than to water stress, which is manifested as the lower inhibition of plant growth and also by a smaller increase in acid phosphatase activity.

Leaf acid phosphatase activity and the phosphorus status of field-grown wheat

1982 ◽  
Vol 33 (3) ◽  
pp. 453 ◽  
Author(s):  
KD McLachlan
Keyword(s):  
Acid Phosphatase ◽  
Grain Yield ◽  
Phosphatase Activity ◽  
Acid Phosphatase Activity ◽  
Plant Performance ◽  
Growth And Yield ◽  
Phosphorus Concentration ◽  
Leaf Extracts ◽  
Phosphorus Status ◽  
Biological Environment

Acid phosphatase activity (E.C.3.1.3.4.1) measured in leaf extracts of field-grown wheat was used to indicate the phosphorus status of the plants. Plants responded to phosphorus applications at both experimental sites, and were sampled on a number of occasions during crop development. Significant (P < 0.001) negative correlations between phosphatase activity and phosphorus status, either phosphorus content or phosphorus concentration, were obtained during the early stages of development (r > - 0.87, R2 > 79 %, and r > - 0.87, R2 > 86 % respectively). The activity at those times was also correlated significantly with final grain yield (r > 0.79, R2 > 73%, P < 0.001). The relations were less useful in the later harvests. The evidence indicates reasons for this, and suggests that even at those harvests leaf phosphatase activity continued to be a very sensitive measure of plant phosphorus status. This sensitivity should make it a useful research tool, but as a field measure, renders the assay subject to interactions with the biological environment that affect growth and yield. Under these circumstances, no single 'critical value' for activity relative to plant performance could be derived to suit all situations. Nevertheless, there seems to be scope for determining local phosphatase standards for particular crops and regional environments which would make the assay a useful diagnostic tool. The assay is simple, direct and rapid, and has the advantage, even under poor seasonal conditions, that the relation with grain yield is best for young plants, the stage at which fertilizer applications have the greatest benefit on final yield.

Erythrophagocytosis in the Liver in Hemolytic Anemias

1968 ◽  
Vol 26 ◽  
pp. 184-185
Author(s):  
O. T. Minick ◽  
E. Orfei ◽  
F. Volini ◽  
G. Kent
Keyword(s):  
Acid Phosphatase ◽  
Oxidative Damage ◽  
Phosphatase Activity ◽  
Kupffer Cells ◽  
Acid Phosphatase Activity ◽  
Common Type ◽  
Red Cell ◽  
Cell Fragments ◽  
Reticulo Endothelial System ◽  
Important Site

Hemolytic anemias were produced in rats by administering phenylhydrazine or anti-erythrocytic (rooster) serum, the latter having agglutinin and hemolysin titers exceeding 1:1000.Following administration of phenylhydrazine, the erythrocytes undergo oxidative damage and are removed from the circulation by the cells of the reticulo-endothelial system, predominantly by the spleen. With increasing dosage or if animals are splenectomized, the Kupffer cells become an important site of sequestration and are greatly hypertrophied. Whole red cells are the most common type engulfed; they are broken down in digestive vacuoles, as shown by the presence of acid phosphatase activity (Fig. 1). Heinz body material and membranes persist longer than native hemoglobin. With larger doses of phenylhydrazine, erythrocytes undergo intravascular fragmentation, and the particles phagocytized are now mainly red cell fragments of varying sizes (Fig. 2).

Tartrate-resistant acid phosphatase activity and glutathione levels are modulated during hFOB 1.19 osteoblastic differentiation

2008 ◽  
Vol 39 (6) ◽  
pp. 627-634 ◽  
Author(s):  
Tatiana Salles de Souza Malaspina ◽  
Célio Xavier dos Santos ◽  
Ana Paula Campanelli ◽  
Francisco Rafael Martins Laurindo ◽  
Mari Cleide Sogayar ◽  
...  
Keyword(s):  
Acid Phosphatase ◽  
Phosphatase Activity ◽  
Acid Phosphatase Activity ◽  
Osteoblastic Differentiation ◽  
Tartrate Resistant Acid Phosphatase
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