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  • 1
    Electronic Resource
    Electronic Resource
    Osmotic induction of fluid-phase endocytosis in onion epidermal cells (1990)
    Springer
    Planta 180 (1990), S. 555-561 
    Details
    ISSN: 1432-2048
    Keywords: Allium ; Apoplast ; Endocytosis (fluidphase) ; Epidermis ; Plasmolysis/deplasmolysis ; Vesicle (endocytic)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A transient plasmolysis/deplasmolysis (plasmolytic cycle) of onion epidermal cells has been shown to induce the formation of fluid-phase endocytic vesicles. Plasmolysis in the presence of the membrane-impermeant fluorescent probes Lucifer Yellow CH (LYCH) and Cascade Blue hydrazide resulted in the uptake of these probes by fluid-phase endocytosis. Following deplasmolysis, many of the dye-containing vesicles left their parietal positions within the cell and underwent vigorous streaming in the cytoplasm. Vesicles were observed to move within transvacuolar strands and their movements were recorded over several hours by video-microscopy. Within 2 h of deplasmolysis several of the larger endocytic vesicles had clustered around the nuclear membrane, apparently lodged in the narrow zone of cytoplams surrounding the nucleus. In further experiments LYCH was endocytically loaded into the cells during the first plasmolytic cycle and Cascade Blue subsequently loaded during a second plasmolytic cycle. This resulted in the introduction of two populations of endocytic vesicles into the cells, each containing a different probe. Both sets of vesicles underwent cytoplasmic streaming. The data are discussed in the light of previous observations of fluid-phase endocytosis in plant cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02411454
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Plasmatubules: an alternative to transfer cells? (1982)
    Springer
    Planta 156 (1982), S. 461-465 
    Details
    ISSN: 1432-2048
    Keywords: Apoplast ; Hordeum (plasmatubules) ; Plasmalemmasome ; Plasmatubule ; Symplast ; Transfer cell
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tubular evaginations of the plasmalemma of the scutellar epithelial cells of barley are described. The evaginations are similar to those present at other sites where solute flux occurs for a limited period only and wall development of the transfer-cell form has not occured. Differential uptake of the fluorescent dyes fluorescein, which moves into the symplast, and 8-anilino-1-naphthalene sulphonic acid, which remains in the apoplast only, indicates that the scutellar epithelial cells contain the boundary between the apoplast and symplast. We suggest that i) the plasmalemma evaginations, which have a specific form and localisation, may be referred to as plasmatubules rather than by the general term plasmalemmasome, and that ii) the plasmatubules may act in membrane amplification in a short-term structural modification which is an alternative to transfer cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393318
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Plasmatubules in transfer cells of pea (Pisum sativum L.) (1985)
    Springer
    Planta 165 (1985), S. 191-196 
    Details
    ISSN: 1432-2048
    Keywords: Apoplast ; Plasmatubule ; Pisum (plasmatubules) ; Symplast ; Transfer cell ; Vein (minor)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Plasmatubules are tubular evaginations of the plasmalemma. They have previously been found at sites where high solute flux between apoplast and symplast occurs for a short period and where wall proliferations of the transfer cell type have not been developed (Harris et al. 1982, Planta 156, 461–465). In this paper we describe the distribution of plasmatubules in transfer cells of the leaf minor veins of Pisum sativum L. Transfer cells are found in these veins associated both with phloem sieve elements and with xylem vessels. Plasmatubules were found, in both types of transfer cell and it is suggested that the specific distribution of the plasmatubules may reflect further membrane amplification within the transfer cell for uptake of solute from apoplast into symplast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395041
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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