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  • 11
    Electronic Resource
    Electronic Resource
    Effects of Flooding the Root System of Sunflower Plants on the Cytokin in Content in the Xylem Sap (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 22 (1969), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The severe chlorosis observed in the lower most of flooded sunflower plants (Helianthus annuus L. cv. Tall Single) may lie initiated by a reduction in the import of cytokinins by the stoot from the flooded root system. Experiment indicates that during 12 hours following the release of flooding, plants previously flooded for 72 hours or less recover their ability to exude sap when the root systems are aerated, and the root systems synthesize and export amino-acids to the shoot. Plants flooded for longer periods lose these abilities. The metabolic activity of the root apices declines parallel with the decline in eytnkinin concentration in the sap with increase in flooding time up to 72 hours. Flooding for 96 hours drastically reduce all four parameters of root activity. After flooding for this period there was a large increase in the number of blackened and tetrazolium-negative root apices which were in all probability dead. The correlation between the metabolic activity of the root apices and the total cytokinin content of the sap supports tbe view that root apices may be sites of cytokinin synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1969.tb09098.x
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  • 12
    Electronic Resource
    Electronic Resource
    On the Nature of Photoperiodic Induction (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 6 (1953), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1953.tb08440.x
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  • 13
    Electronic Resource
    Electronic Resource
    The Sequestration of Calcium from Preparations of Wheat Coleoptile Cell Walls (1959)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 12 (1959), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1959.tb07929.x
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  • 14
    Electronic Resource
    Electronic Resource
    Effects of pH on the Activity of Chelating Agents and Auxins in Cell Extension (1959)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 12 (1959), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1959.tb07930.x
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  • 15
    Electronic Resource
    Electronic Resource
    Opioid Receptors on Murine Splenocytes (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 540 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb27215.x
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  • 16
    Electronic Resource
    Electronic Resource
    Red Light Induction of Gibberellin Synthesis in Leaves (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 580-582 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. The effect of red illumination on the gibberellin content of leaves of barley seedlings. A, Dwarf-1 maize assay; B, barley endosperm assay. Barley seedlings (variety 'Pallas') were grown in moist sand, in darkness, for 1 week at 25 C. Working in a green safe light6 a known number of 2 cm ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/217580a0
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  • 17
    Electronic Resource
    Electronic Resource
    Replacement of the requirement for vernalisation in centaurium minus moench by gibberellic acid (1957)
    Springer
    Naturwissenschaften 44 (1957), S. 428-429 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00623895
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  • 18
    Electronic Resource
    Electronic Resource
    Effects of a dwarfing compound, CCC, on the production and export of gibberellin-like substances by root systems (1967)
    Springer
    Planta 73 (1967), S. 1-11 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary (2-Chloroethyl)trimethylammonium chloride (Cycocel or CCC), an inhibitor of gibberellin biosynthesis, when repeatedly supplied to the root systems of balsam (Impatiens glandulifera Royle) plants reduces growth in height and the level of gibberellin-like substances in the bleeding sap that exudes from the stumps of detopped plants. Within twelve hours after a single application of the inhibitor to decapitated field peas (Pisum arvense), there are quantitative and qualitative changes in the gibberellins of the sap compared with those in sap collected over the same period of time from untreated plants. These changes are interpreted in terms of the possible blockage by CCC of normal gibberellin production and diversion of precursors into synthesis of “abnormal” gibberellins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00419836
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  • 19
    Electronic Resource
    Electronic Resource
    Isolation, properties, and structure of fraction I protein from Avena sativa L (1968)
    Springer
    Planta 79 (1968), S. 254-267 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. A method is described for the extraction and purification of Fraction I protein from Avena sativa L. leaves. 2. The protein possesses ribulose diphosphate carboxylase activity. Chromatography on gels of Sephadex G-200 separates phosphoribulokinase and ribose phosphate isomerase from the carboxylase. 3. The S°20w was calculated to be 18.2, the Stokes radius (determined by gel filtration on a cabibrated column) 74 Å, the molecular weight 5.7×105, and the frictional ratio 1.35. 4. An amino acid analysis is presented. 5. Electron microscope observations of negatively-stained Avena Fraction I protein molecules are compatible with the suggestion that they consist of 24 protomers disposed on the surface of an octahedral shell with 4:3:2 symmetry, and of diameter approximately 105 Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396032
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  • 20
    Electronic Resource
    Electronic Resource
    Actinomycin-D inhibition of phytochrome-mediated responses (1966)
    Springer
    Planta 69 (1966), S. 70-78 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Actinomycin D vermag verschiedene phytochromgesteuerte Reaktionen etiolierter Pflanzen zu hemmen. So wird z. B. die von Rotlicht induzierte Aufrollung des ersten Blattes von im Dunkeln kultivierter Gerste besonders durch Act. D gehemmt, wenn man das Antibioticum ungefähr 80 min nach der Belichtung appliziert; spätere oder frühere Darbietung wirkt weniger oder überhaupt nicht. Die Hemmung wird durch Desoxyguanosin aufgehoben. Unter Berücksichtigung der bekannten Aktionsweise des Actinomycins D bei der DNS-abhängigen RNS-Synthese und der aus der Literatur bisher bekannten Tatsachen über phytochromgesteuerte Reaktionen muß vermutet werden, daß das Phytochrom eng an das DNS gebunden ist (vermutlich auch in Plastiden und Mitochondrien!) und als Repressor-System fungiert. Rotlicht löst diese Bindung und ermöglicht dadurch die Gen-Wirkung.
    Notes: Summary Actinomycin-D inhibits phytochrome-mediated responses of etiolated plants. In the unrolling response of a barley first leaf the inhibition by act. D is greater when the antibiotic is applied 80 minutes after irradiation; earlier or later applications are less inhibitory. Inhibition is relieved by deoxyguanosine applied before or after act. D. Similar effects are found with the plumular hooks of peas and beans. These results suggest that phytochrome-mediated responses involve RNA production on a DNA template. The location of phytochrome in the cell is discussed in relation to its possible association with DNA, especially that of the plastids and mitochondria. Phytochrome may thus act as a repressor of gene sequences involved (for instance) in the removal of etiolation symptoms, red light (660 nm) causing its dissociation from DNA. Far-red radiation may reverse the effects by causing re-association of phytochrome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380212
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