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  • Electronic Resource  (2)
  • 1985-1989  (2)
  • 1986  (2)
  • GC-MS  (1)
  • Spinacia (photosynthesis)  (1)
  • concentration profiles  (1)
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Material
  • Electronic Resource  (2)
Years
  • 1985-1989  (2)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    The influence of a decrease in irradiance on photosynthetic carbon assimilation in leaves of Spinacia oleracea L. (1986)
    Springer
    Planta 167 (1986), S. 414-420 
    Details
    ISSN: 1432-2048
    Keywords: Carbon dioxide assimilation ; Light and carbon assimilation ; Spinacia (photosynthesis) ; Sucrose synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When leaves of Spinacia oleracea L. were subjected to a decrease from a saturating to a limiting irradiance, photosynthetic carbon assimilation exhibited a pronounced lag. This comprised a postlower-illumination CO2 burst (Vines et al. 1982, Plant Physiol. 70, 629–631) and a slow increase in the rate of carbon assimilation to the new lower steady-state rate. The latter phenomenon was distinguishable from the former because it was present in leaves when photorespiration was inhibited by high concentrations of CO2 or by 2% O2. A lag which followed a decrease in irradiance was also evident in leaves of Zea mays in air or in isolated spinach protoplasts photosynthesising in high CO2. The lag was not stomatal in origin. The origin of the lag which followed the decrease in irradiance was investigated. Measurements of total 14CO2 fixation and 14C incorporated into sucrose during the transition in irradiance showed that sucrose synthesis displayed an overshoot during the transient which accounted for all of the carbon fixed during the first 90 s of the transition period. The behaviour of hexose phosphates in the intact leaf and in the cytosol was inconsistent with their supporting sucrose synthesis during the transient. It is concluded that the overshoot in sucrose synthesis imposes a drain on chloroplast intermediates which contributes to the temporary lag in the rate of carbon assimilation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391348
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of chemical signals in a primate species (Saguinus fuscicollis): Use of behavioral, chemical, and pattern recognition methods (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 513-531 
    Details
    ISSN: 1573-1561
    Keywords: Chemical communication ; scent marking ; pattern recognition ; Saguinus fuscicollis ; GC-MS ; primate ; tamarin ; skin secretions ; n-butyrate esters ; concentration profiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Scent marking with specialized skin glands is a common behavior in the tamarin,Saguinus fuscicollis. The scent marks identify species, subspecies, gender, and individual, and they also contain information on the social position and hormonal condition of an animal. The marks are chemically complex, containing a large number of compounds. Analysis by means of gas chromatography-mass spectrometry has identified 16 major components (squalene and 15 esters of butyric acid). These compounds are present in the marks of males and females of two subspecies,Saguinus f. fuscicollis andSaguinus f. illigeri. Application of computerized pattern recognition techniques has shown that concentration patterns of some of the butyrates are diagnostic of the two subspecies while concentration patterns of other butyrates are diagnostic of males and females regardless of subspecies. Behavioral studies have shown that the concentration patterns of butyrates and squalene alone do not encode information on subspecies and gender. It is, however, likely that this information is partially encoded by these specific butyrate-squalene concentration patterns but that yet unidentified compounds in the scent marks serve as necessary synergists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020570
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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