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  • Citrus  (2)
  • IR spectroscopy  (2)
  • Springer  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Is the Phytophthora citrophthora culture filtrate a reliable tool for the in vitro selection of resistant Citrus variants? (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 569-574 
    Details
    ISSN: 1432-2242
    Keywords: Phytophthora citrophthora ; Citrus ; Culture-filtrate ; Indole acetic acid ; Protoplast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Nucellar calli from four Citrus cultivars with known resistance to the Phytophthora citrophthora pathogen were chosen as experimental material to test the pathogen's response to culture filtrate (CF). Sensitivity of the four calli to CF of the fungus was in reverse order to what is known on the susceptibility of the cultivars in vivo. Sensitivity of protoplasts derived from the same four calli to 2,4-dichlorophenoxyacetic acid (2,4-D) was in the same order as that of calli to CF. Protoplasts derived from calli selected for tolerance to CF showed a higher plating efficiency with increasing concentration of CF in the medium. TLC and GLC determinations showed the presence of indole acetic acid in the culture filtrate. Results indicate that CF of P. citrophthora cannot be used as a selection tool in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00289542
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of ethylene treatment on transport and metabolism of indole-3-butyric acid in citrus leaf midribs (1992)
    Springer
    Plant growth regulation 11 (1992), S. 357-362 
    Details
    ISSN: 1573-5087
    Keywords: Citrus ; conjugation ; ethylene ; IAA ; IBA ; polar transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Transport and metabolism of radiolabeled indole-3-butyric acid (IBA) were studied in midrib sections of Cleopatra mandarin (Citrus reticulata Blanco) and compared to that of indole-3-acetic acid (IAA). Exogenous IBA was metabolized by the midribs to a polar compound, probably an ester conjugate. Ethylene pretreatment of the midribs reduced their capacity to metabolize IBA by ca. 70% as compared to air pretreatment. IBA transport capacity in the leaf midribs was ca. two times greater in the basipetal direction than the acropetal. The basipetal transport capacity of 3H-IBA was lower than that of 14C-IAA (ca. 24% and 39% of the uptake, respectively). While ethylene treatment reduced basipetal transport of IAA by ca. 70% it did not affect the transport of IBA. Most of the transported label was found as free IBA, but the reduction of IBA conjugation by ethylene treatment did not affect the transport capacity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00130642
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  • 3
    Electronic Resource
    Electronic Resource
    The structure ofO-arylmercury derivatives of dihydroxy-9,10-anthraquinones and their reactions with anions (1996)
    Springer
    Russian chemical bulletin 45 (1996), S. 2784-2791 
    Details
    ISSN: 1573-9171
    Keywords: IR spectroscopy ; electron spectroscopy ; hydroxyanthraquinone derivatives
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The structure of mono- and di-O-arylmercury-derivatives of quinizarin (1,4-dihydroxy-9, 10-anthraquinone) and anthrarufin (1,5-dihydroxy-9, 10-anthraquinone) and their reactions with Br−, Cl−, OH−, andtBuO− anions in the solid state and in aprotic solvents were examined by vibrational and electron spectroscopy. These reactions result in cleavage of the O-Hg bond. The formation of ions or contact ion pairs depends on the size and nature of the counterion; quinizarin dianions give very strong ion pairs with K+ cations, which do not cleave in DMSO. The electronic structure of mono- and dianions of the compounds studied is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01430643
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  • 4
    Electronic Resource
    Electronic Resource
    Visualization of solid-state reactions of anisylmercury and triphenylphosphinegold derivatives of phthaleins with bromides (1993)
    Springer
    Russian chemical bulletin 42 (1993), S. 2028-2030 
    Details
    ISSN: 1573-9171
    Keywords: phthaleins ; electronic reflectance spectroscopy ; IR spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The visualization of solid-state reactions of bis-O-metallated phenolphthaleins and xylenolphthaleins (M=HgC6H4OMe, AuPPh3) with bromides, which has been discovered for the first time, was studied by IR and electronic reflectance spectroscopy. The appearance of intense coloration (purple, violet, or blue) after short-term grinding of colorless or faintly colored solid samples with salts is due to their ionization with the formation of ion pairs or dianions depending on the nature of the counterion. The reaction affects only a small fraction of the molecules in the surface layers of the metallocomplexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698891
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