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  • 1
    Digitale Medien
    Digitale Medien
    Cytochemical localization of ATPase activity in phloem tissues ofRicinus communis (1980)
    Springer
    Protoplasma 104 (1980), S. 55-65 
    Details
    ISSN: 1615-6102
    Schlagwort(e): ATPase cytochemistry ; Phloem ; Ricinus communis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Standard lead precipitation procedures have been used to examine the localization of ATPase activity in phloem tissues ofRicinus communis. Reaction product was localized on the plasma membrane of the companion cells associated with sieve elements and of parenchyma cells in phloem tissues from the leaf, petiole, stem and root. ATPase activity was also present on the plasma membrane and dispersed P-protein of sieve elements in petiole, stem and root tissue, but was absent from the plasma membrane of these cells in the leaf minor veins. Substitution ofβ-glycerophosphate for ATP produced no change in the localization of reaction product in leaf tissue. These findings are discussed in relation to current theories on the mechanism of sugar transport and phloem loading.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01279368
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The validity of the lead precipitation technique for the localization of ATPase activity in plant cells (1980)
    Springer
    Protoplasma 104 (1980), S. 193-200 
    Details
    ISSN: 1615-6102
    Schlagwort(e): Analytical electron microscopy ; ATPase cytochemistry ; Plasma membrane ; Ricinus communis ; Triticum aestivum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The claim that osmium-containing deposits which lack lead are frequently and incorrectly interpreted as enzymatic reaction products in lead precipitation techniques for ATPase localization in plants is without foundation. Proper controls clearly demonstrate the enzymatic origin of membrane-located deposits and the presence of lead is confirmed by analytical electron microscopy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01279767
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
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