Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Humic acid  (2)
  • Acer  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Distribution of soil invertase in relation to the root systems ofPicea sitchensis (Bong.) Carr. andAcer pseudoplatanus L. during development of young plants (1994)
    Springer
    Plant and soil 167 (1994), S. 73-77 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Acer ; invertase ; Picea ; rhizosphere ; roots ; statistics ; trees
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract A method is described for sampling rhizosphere soil under newly establishedPicea sitchensis andAcer pseudoplatanus. The technique involves taking soil samples to a depth of 150 mm at 100 mm intervals along transects, each 45° from its neighbour, radiating from the base of the stem. Invertase activities were measured in the soil samples and compared to their activities in fallow and rhizosphere soils. When the field soil was dry, the tree root systems were carefully excavated to retain as many fine roots as possible. The distribution of the soil invertase was matched to the spatial distribution of the roots showing the precise position of the rhizosphere relative to the initial ‘blind’ soil sampling. Statistics were applied to derive equations for calculating the percentage enzyme activity relative to that found in rhizosphere soil at various locations radiating from the base of the stem. This information was subsequently applied to soil sampled under trees of the same age as those excavated to give a non-destructive method for sampling rhizosphere soil routinely from under a large number of trees.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01587601
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Anin vitro effect of soil organic matter fractions and synthetic humic acids on the generation of superoxide radicals (1982)
    Springer
    Plant and soil 66 (1982), S. 113-116 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Dismutase ; Fulvic acid ; Humic acid ; Lemna ; Organic matter ; Superoxide dismutase ; Xanthine oxidase
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Humic acid, and the acid-extracted residue obtained from it, stimulated the production of superoxide radicals (O2 .−) generated in the xanthine-xanthine oxidase system. Several synthetic humic acids, prepared by the oxidation of simple phenolic substances, also stimulated the production of O2 .− but the degree of stimulation depended on the initial phenol. Fulvic acid and water-extractable soil organic matter were less effective in stimulating O2 .− production than was humic acid. The activity of superoxide dismutase, an enzyme which destroys O2 .−, was also enhanced by HA. In contrast, fulvic acid and water-extractable soil organic matter had little effect on the activity of the dismutase.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02203408
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Influence of humic acid on iron required for the formation of hydroxyproline in discs ofBeta vulgaris L. storage tissue (1983)
    Springer
    Plant and soil 73 (1983), S. 27-34 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Beta vulgaris ; Cell walls ; Chelating agents ; Humic acid ; Hydroxyproline ; Iron ; Proline ; Proteins ; Storage tissue
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary When discs of beetroot storage tissue are washed (aged) in water for three days, there is at least a 100 per cent increase in the content of their cell-wall bound hydroxyproline. Humic acid, prepared from an agricultural soil, enhances this increase. The effects of humic acid on the increase in the hydroxyproline content of cell walls, as well as on the formation of14C-labelled hydroxyproline from14C-proline, are compared with those effects produced by the chelating agents 2,2′-dipyridyl and 8-hydroxyquinoline. It is suggested that humic acid enhances hydroxyproline formation either by a mechanism which renders more ferrous iron available for the hydroxylation of proline to hydroxyproline within the tissue, and/or a mechanism which stimulates the enzyme required for the hydroxylation process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02197754
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...