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  • 1990-1994  (3)
  • 1935-1939
  • Glycine max  (2)
  • Alzheimer's disease  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Amino acid concentrations in cerebrospinal fluid and serum in Alzheimer's disease and vascular dementia (1993)
    Springer
    Journal of neural transmission 6 (1993), S. 1-9 
    Details
    ISSN: 1435-1463
    Keywords: Alzheimer's disease ; vascular dementia ; CSF ; amino acids ; aspartate ; glutamate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cerebrospinal fluid (CSF) and serum levels of 22 amino acids were studied in 13 patients with dementia of the Alzheimer type (DAT), 13 patients with vascular dementia (VD) and 15 age-matched controls. We found significantly reduced levels of glutamate in CSF samples from DAT patients compared to VD and control subjects, but CSF levels of aspartate were found to be significantly elevated in the two groups of dementia studied. Moreover, CSF concentrations of tyrosine, leucine and phenylalanine were significantly increased in VD patients in comparison with those in DAT patients and control subjects. Our results showed a wide increase in CSF/serum amino acid ratios in DAT and VD groups compared to controls. However, no differences were found in CSF/serum ratios between dementia groups. These changes show evidence for a possible disorder of amino acid metabolism with different patterns in these two dementia types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02252617
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of juglone on growth, photosynthesis, and respiration (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 559-568 
    Details
    ISSN: 1573-1561
    Keywords: Juglone ; allelopathy ; allelochemical ; photosynthesis ; chioroplast ; mitochondria ; Lemna minor ; Glycine max
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The impacts of juglone on plant growth and several other physiological functions were evaluated in this study. Juglone inhibitedLemna minor growth, chlorophyll content, and net photosynthesis at treatments between 10 and 40μM. Soybean leaf disks vacuum infiltrated with as little as 10μM juglone had reduced photosynthesis. Oxygen evolution by chloroplasts isolated fromPisum sativum was inhibited by juglone with an I50 of 2μM. Micromolar treatments of juglone stimulated oxygen uptake in mitochondria isolated fromGlycine max. These data suggest perturbations of chloroplast and mitochondrial functions may contribute to plant growth reductions observed in juglone-mediated allelopathy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994325
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of salicylic acid on plant-water relationships (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 237-247 
    Details
    ISSN: 1573-1561
    Keywords: Salicylic acid ; allelopathy ; plant-water status ; water stress ; 13C ; carbon isotopes ; soybean ; Glycine max
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Soybean seedlings [Glycine max (L.) Merr.] were used as the test species to study the allelopathic influence of salicylic acid (SA) on short- and long-term plant water status. Plants were grown in greenhouse conditions in nutrient culture medium amended with SA. Treatments were initiated 10 days after germination and continued for either 14 or 28 days. The threshold for inhibition of seedling growth over a 28-day treatment was 0.15 mM SA. Seedlings grown with 0.3 mM SA consistently had higher leaf diffusive resistance and lower transpiration and water potentials than control plants. The stable carbon isotope ratio (13C:12C) in tissue from both the 0.15 and 0.30 mM SA-treated plants was significantly higher than control seedlings, indicating SA caused a chronic water stress during the 28-day treatment. These data show that an interference with plant-water relationships is one mechanism whereby this allelochemical inhibits plant growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00993692
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    Paper (German National Licenses)
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