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  • Aculeacin A  (1)
  • Air temperature  (1)
  • 1
    ISSN: 1573-5052
    Keywords: Air temperature ; Edaphic moisture ; Fagus sylvatica ; Forest micrometeorology ; Meteorological station ; P.A.R. ; Photoperiodicity ; Quercus pyrenaica ; Relative humidity ; Tree foliation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We compared the flowering and fruiting phenology of Symphytum tuberosum L. (Boraginaceae), Hyacinthoides non-scripta (L.) Chouard (Liliaceae) and Melittis melissophyllum L. (Labiatae) in a beech wood and an oak wood situated in the same valley, taking into account their different microclimatic and edaphic characteristics and carrying out correlation and simple regression analyses. Differences observed in the phenological cycles of the species studied included earlier flowering and longer cycles in the oak wood, except for H. non-scripta. The most important climatic factors were soil moisture and the relative humidity, followed by temperature and the number of daylight hours and photosynthetically active radiation (P.A.R.). The M. melissophyllum cycle depended mainly on water availability, H. non-scripta on solar radiation, soil moisture and a temperature threshold value, while no specific climatic parameter was found to affect S. tuberosum. Temperature was found to be less important than previously believed as it seems only to correlate with S. tuberosum flowering. The strong correlation observed in the fruiting of the three species indicated clear synchronization.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-072X
    Keywords: Yeasts ; Cell wall ; Mannoproteins ; Aculeacin A ; Glucan ; Protoplasts ; Saccharomyces cerevisiae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Inhibition of the synthesis of alkali-insoluble glucan by aculeacin A in Saccharomyces cerevisiae cells caused a decrease in the incorporation of a high molecular weight heterogeneous mannoprotein material and of a 33000 mannoprotein into the wall network. This was concomitant with the excretion of the latter molecule into the growth medium. Regenerating yeast protoplasts liberated considerable amounts of the heterogeneous material to the medium independently of the presence of aculeacin. The protoplast walls did lack this component and contained only minor amounts of the 33000 molecule, which was also completely absent from walls of aculeacin-treated protoplasts. Considerable levels of the 33000 species were immunodetected in the supernatants from treated and untreated protoplasts. These results point to the existence of specific interactions between the glucan network of the yeast cell surface and some of the wall mannoproteins. On the other hand, the presence of a population of SDS-solubilizable mannoproteins in the wall was independent of glucan levels.
    Type of Medium: Electronic Resource
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