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  • 1
    Electronic Resource
    Electronic Resource
    Cuticle Structure and Water Relations of Pine Needles (1963)
    [s.l.] : Nature Publishing Group
    Nature 198 (1963), S. 770-771 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MANY pines show a marked resistance to desiccation during drought1'2; this is partly attributable to the very slow loss of water by cuticular transpiration through the thick waxy covering over the cuticle of the needles3. Since there is generally a close correspondence between rates of cuticular ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/198770a0
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  • 2
    Electronic Resource
    Electronic Resource
    Electron Microscopy of Leaf Surfaces (1957)
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 330-331 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The method employs evaporated carbon1, and is carried out as follows. A portion of the leaf to be examined is fixed to a glass slide with 'Sellotape', and the assembly placed in an evaporating plant. There is very little gassing, and a sufficiently good vacuum to allow the deposition of a carbon ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/180330b0
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  • 3
    Electronic Resource
    Electronic Resource
    Embedding Large Slices of Plant Tissue for Electron Microscopy (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 1296-1297 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Shell 'Epikote Resin 812', which is slightly less viscous than Ciba 'Araldite resin M' but otherwise possesses all the virtues of the latter, was used exclusively. Luffs method was followed closely, and the most successful balance of hardeners for meristematic tissue was found to be four parts of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1941296b0
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  • 4
    Electronic Resource
    Electronic Resource
    Geotropism (1976)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 27 (1976), S. 385-406 
    Details
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.27.060176.002125
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  • 5
    Electronic Resource
    Electronic Resource
    Root Cap and the Perception of Gravity (1966)
    [s.l.] : Nature Publishing Group
    Nature 209 (1966), S. 93-94 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Removal of the cap has no effect whatever on the growth in length of the root as a whole, whatever the orientation of the root may be. This is in strong contrast to the early claims1, on which much of the theory of root growth control has been based, that decapitation accelerates extension rate. On ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/209093a0
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  • 6
    Electronic Resource
    Electronic Resource
    Cytoplasmic Organelles and Cell Growth in Root Caps (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 864-865 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CELLS are the products of expansion arid division of other cells, and so mechanisms must exist for the division or the production de novo of cytoplasmic organelles to compensate for increase in the size and the number of cells. There are many references to possible mechanisms for the duplication, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/208864a0
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  • 7
    Electronic Resource
    Electronic Resource
    Low and high voltage electron microscopy of mitosis and cytokinesis in maize roots (1981)
    Springer
    Planta 152 (1981), S. 397-407 
    Details
    ISSN: 1432-2048
    Keywords: Cytokinesis ; High voltage electron microscopy ; Mitosis ; Zea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The structure and distribution of cytoplasmic membranes during mitosis and cytokinesis in maize root tip meristematic cells was investigated by low and high voltage electron microscopy. The electron opacity of the nuclear envelope and endoplasmic reticulum (ER) was enhanced by staining the tissue in a mixture of zinc iodide and osmium tetroxide. Thin sections show the nuclear envelope to disassemble at prophase and become indistinguishable from the surrounding ER and polar aggregations of ER. In thick sections under the high voltage electron microscope the spindle is seen to be surrounded by a mass of tubular (TER) and cisternal (CER) endoplasmic reticulum derived from both the nuclear envelope and ER, which persists through metaphase and anaphase. At anaphase strands of TER traverse the spindle between the arms of the chromosomes. The octagonal nuclear pore complexes disappear by metaphase, but irregular-shaped pores persist in the membranes during mitosis. It is suggested that these form a template for pore-complex reformation during telophase. Phragmoplast formation is preceded by an aggregation of TER across the spindle at anaphase. Evidence is presented to suggest that the formation of the desmotubule of a plasmodesma is by the squeezing of a strand of endoplasmic reticulum between the vesicles of the cell plate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385355
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  • 8
    Electronic Resource
    Electronic Resource
    The plasma membrane of young Chara internodal cells revealed by rapid freezing (1986)
    Springer
    Planta 169 (1986), S. 153-161 
    Details
    ISSN: 1432-2048
    Keywords: Chara ; Charasome ; Intramembrane particle (lines, rosettes) ; Membrane fusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Young elongating internodal cells of Chara globularis var. capillacea (Thuill.) Zanev. were rapidly frozen and freze-fractured in order to observed transient events occurring within the plasma membrane. Several structures have been observed. Relatively small depressions, varying in depth, are prolific and scattered at random over the plasma membrane. Charasomes and clusters of particle rosettes are common. Arrays of intramembrane particle lines are a characteristic feature of the internodal cell plasma membrane. The charasomes and the arrays of particle lines occupy a considerable proportion of the plasma membrane. In these young cells, substantial movement must take place across this membrane and its basic structure must fluctuate accordingly. The innumerable small depressions may represent pinocytotic and secretory processes. The array of intramembrane particle lines may represent stages in fusion between the membranes of vesicles within the cytoplasm and the plasma membrane. The technique of ultra-rapid freezing allows these events and their intermediate stages to be visualised; some features of the membrane may only be seen by this method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392309
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  • 9
    Electronic Resource
    Electronic Resource
    The distribution of plasmodesmata in the root tip of maize (1969)
    Springer
    Planta 89 (1969), S. 352-360 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of plasmodesmata in different regions of the root apex of Zea mays has been analysed from electron micrographs. There are many more plasmodesmata traversing transverse walls than across longitudinal walls in all the regions studied. When the number of plasmodesmata per unit cell volume is calculated, cells in non-dividing tissue have a considerably lower value than cells in dividing tissue. Evidence for the transport of materials between cells via plasmodesmata is summarised. If it is accepted that plasmodesmata do act as channels for intercellular communication then we believe that their pattern of distribution may be a contributory factor to the process of cell differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387235
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  • 10
    Electronic Resource
    Electronic Resource
    The fine structure of the cells that perceive gravity in the root tip of maize (1970)
    Springer
    Planta 95 (1970), S. 314-329 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Within the root cap, in maize, the cells believed to be responsible for the perception all possess large well-developed amyloplasts. They also have normal mitochondria and Golgi bodies, normal rough-surfaced ER with a very striking pattern of distribution, few free ribosomes, walls with an abnormal reticulate encrusting material, irregularly distributed plasmodesmata and an as yet unidentified fine quadruple membranous system. All of these features are discussed in relation to the role of the cells in perception.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384703
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