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  • 1
    Electronic Resource
    Electronic Resource
    AN IMPROVED CYST COUNTING TRAY (1957)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 6 (1957), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1957.tb00780.x
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  • 2
    Electronic Resource
    Electronic Resource
    Acid phosphatase activity in intercellular spaces in roots of Nymphoides peltata (S. G. Gmel.) O. Kuntze (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 5 (1982), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Acid phosphatase was found cytochemically in intercellular spaces in the root of Nymphoides peltata. Different methods, using lead salts and azo-dyes, gave similar results. Reaction product appeared on material, possibly cytoplasmic, within the intercellular spaces and also against the outer walls of cells which formed the intercellular spaces. Possible functions of acid phosphatase in intercellular spaces are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1365-3040.ep11572437
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  • 3
    Electronic Resource
    Electronic Resource
    Sites of acid phosphatase in the differentiating root protophloem of Nymphoides peltata (S.G. Gmel.) O. Kuntze. (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 4 (1981), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Sites of acid-phosphatase activity were found in the differentiating root protophloem of Nymphoides peltata by lead-salt and by azo-dye methods. Different substrates revealed different subcellular locations of the enzyme. The substrates β-glycerophosphate (β-GP) and naphthol ASBI phosphate revealed enzyme activity at similar sites within the sieve element. These sites included plasmodesmata, dictyosomes and small vacuoles in the cytoplasm. The substrate p-nitrophenylphosphate (p-NPP), however, revealed additional sites of acid-phosphatase activity which were not detectable by either naphthol ASBI phosphate or β-GP. For example, the inner region of the wall in mature sieve elements showed conspicuous acid-phosphatase activity only when p-NPP was used as substrate. The significance of the different locations of acid phosphatase within the sieve element is discussed.The convoluted ER, characteristic of immature sieve elements of N. peltata, failed to show acid-phosphatase activity whichever substate was used. By contrast, the stacked ER found in the parietal layer of mature sieve elements showed prominent acid-phosphatase activity regardless of the substrate used. The demonstration of acid-phosphatase activity in the stacked ER, and by both lead-salt and azo-dye methods, suggests that this organelle is a true site of acid-phosphatase activity.The onset of acid-phosphatase activity in the ER in later stages of sieve-element differentiation is compatible with the view that stacked ER plays a role in the final autolysis of the sieve-element protoplast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1981.tb00832.x
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  • 4
    Electronic Resource
    Electronic Resource
    Potassium permanganate fixative and the electron microscopy of sieve tube contents (1966)
    Springer
    Planta 68 (1966), S. 36-43 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Sieve tube “slime” is probably fibrillar as suggested by other workers. The granular material seen in electron micrographs of sieve tubes “fixed” with potassium permanganate is mostly a precipitate produced by the reaction of the permanganate with the sieve tube contents, particularly with sucrose, and with reagents used in the fixing, dehydrating and embedding process. Potassium permanganate is not therefore a good fixative for the electron microscopy of sieve tube contents. Neither is it suitable for the study of fine structure in vacuoles or vesicles containing precipitable solutes in other kinds of cells nor for examining the fine structure of their ground cytoplasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385369
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  • 5
    Electronic Resource
    Electronic Resource
    The conduction of sap (1966)
    Springer
    Planta 69 (1966), S. 43-52 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An apparatus has been constructed for the detection of vibrations generated within plant tissue. This can detect vibrations due to water cavitation within fern sporangia. Using this detector ‘clicks’ have been obtained from Ricinus petioles and leaves in a condition when, from previous work, water cavitation might be expected. Evidence is provided to show: 1. That ‘click’ production is correlated with the water status of the plant tissue. 2. There are reasons for opposing the possibility that ‘clicks’ result from tissue fracture alone. 3. The ‘clicks’ may be detected in a wide range of plants. The implications of the apparent vulnerability of water conducting systems in plants are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380209
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  • 6
    Electronic Resource
    Electronic Resource
    Negative stain in wax tubes from the surface of Sitka spruce leaves (1970)
    Springer
    Planta 95 (1970), S. 179-182 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Carbon replicas and scanning electron micrographs of wax outgrowths on some leaf surfaces have not shown conclusively whether the outgrowths are tubes or solid rods. Some workers have suggested that they are solid rods. We find that negative stains will penetrate into a cavity in the centre of wax outgrowths on leaves of Sitka spruce (Picea sitchensis Bong. Carr) and Tulipa kaufmanniana Elliot. Thus these outgrowths appear to be tubes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387249
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  • 7
    Electronic Resource
    Electronic Resource
    Epicuticular wax in the stomatal antechamber of sitka spruce and its effects on the diffusion of water vapour and carbon dioxide (1971)
    Springer
    Planta 98 (1971), S. 1-10 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of wax tubes on the leaf surfaces is described, especially the presence of wax tubes in the antechambers of the stomata. The extra resistances which the wax-filled antechambers add to the other resistances in the pathway for diffusion of water vapour and of carbon dioxide are calculated. We conclude that the wax-filled stomatal antechambers reduce the rate of transpiration by about two thirds but reduce the rate of photosynthesis by only about one third. Thus wax-filled stomatal antechambers are excellent antitranspirants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387018
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  • 8
    Electronic Resource
    Electronic Resource
    Fine structure of the host-fungus interface in orchid mycorrhiza (1971)
    Springer
    Planta 100 (1971), S. 191-199 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Electron microscopy of protocorms of Dactylorhiza purpurella infected with a symbiotic Rhizoctonia sp. showed that the intracellular hyphae examined did not penetrate the plasmalemma of the host cell. Walls of hyphae within cells bore many hemispherical protuberances over which the host plasmalemma was closely pressed. we estimate that these protuberances would increase the area of contact between hyphae and host plasmalemma by about 15%. They were not found on hyphae growing on agar. Except for these protuberances, and some vesicles or tubules which invaginated the fungus plasmalemma, no other structures were seen which could be suggested to be adaptations to transport across the living fungus-host interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387035
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  • 9
    Electronic Resource
    Electronic Resource
    The structure of freeze-etched bordered-pit membranes of Abies grandis (1973)
    Springer
    Wood science and technology 7 (1973), S. 256-260 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Sapwood, frozen in a conducting state, was freeze-etched for electron microscopy to show undried bordered-pit membranes. These appeared similar in structure to non-aspirated pit membranes observed in wood dried from organic solvents. Freeze-etching showed that, even before drying, the torus is lens-shaped in section and suspended by a margo of large radial strands and numerous smaller fibrils. Globular objects, previously undescribed, whose diameters ranged from 0.3 to 1 μm, were found distributed at random on pit membranes and tracheid walls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351071
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  • 10
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    Epicuticular wax in the stomatal antechamber of sitka spruce and its effects on the diffusion of water vapour and carbon dioxide (1971)
    Springer
    Details
    Publication Date: 1971-01-01
    Print ISSN: 0032-0935
    Electronic ISSN: 1432-2048
    Topics: Biology
    Published by Springer
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