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  • Fatty acid composition  (1)
  • Glutathione reductase  (1)
  • 1985-1989  (2)
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  • 1985-1989  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Combined electron-spin-resonance, X-ray-diffraction studies on phospholipid vesicles obtained from cold-hardened wheats (1987)
    Springer
    Planta 170 (1987), S. 14-19 
    Details
    ISSN: 1432-2048
    Keywords: Fatty acid composition ; Frost tolerance ; Membrane fluidity ; Phase transition temperature ; Triticum (frost hardiness)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phospholipid multibilayers, obtained from two cultivars of thermally acclimated wheats of different frost resistances (Triticum aestivum L. cv. Penjamo 62, the sensitive cultivar, and T. aestivum L. cv. Miranovskaja 808, the frost-resistant cultivar), were investigated using electron-spin-resonance and X-ray-diffraction techniques. The former technique revealed two breaks in the motion of the spin-labelled fatty acid 2-(14-carboxyte-tradecyl)-2-ethyl-4,4-dimethyl-3-oxazolidinyloxyl, for both cultivars (+3°C,-17° C and +5° C,-18° C, respectively) when grown at 22° C. The resistant cultivar compensated for exposure to cold (+2° C) by shifting the onset of the apparent phase-separation temperature from +3° C to-16° C. The sensitive cultivar was unable to do so. X-ray diffraction did not reveal fluid-to-gel transitions between +20° C and-10° C in any of the samples. The possible role of the formation of relatively ordered aggregates or clusters of lipid molecules discerned by spin probe within the otherwise freely dispersed liquid-like lipids is discussed in terms of freezing injury of plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392375
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Glutathione, a tripeptide which may function as a temporary storage compound of excessive reduced sulphur in H2S fumigated spinach plants (1986)
    Springer
    Plant and soil 91 (1986), S. 349-352 
    Details
    ISSN: 1573-5036
    Keywords: Cucumis sativus L. ; Glutathione ; Glutathione reductase ; H2S ; H2S emission ; Oxidized glutathione ; Spinacia oleracea L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Exposure of spinach plants to 250 ppb H2S for two days resulted in a four-fold increase of the reduced glutathione (GSH)/sulphydryl (SH) concentration and in a two-fold increase of the oxidized glutathione (GSSG) concentration of the shoots. Both in the presence and the absence of H2S, glutathione was predominantly present in the reduced form (more than 86%). When the H2S exposure was ceased both the levels of GSH and GSSG in the shoot rapidly decreased. There was no emission of H2S by the leaves after the fumigation was terminated. Glutathione reductase activity in the shoots was not affected by short term H2S fumigation. It is proposed that glutathione plays the role of a temporary storage compound of excessive reduced sulphur in spinach shoots when exposed to H2S in the ambient air.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02198121
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    Paper (German National Licenses)
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