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  • 1985-1989  (2)
  • Allergologia  (1)
  • Canna indica L  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The ultrastructure of polymorphic pollen grains of Canna indica L. (1989)
    Springer
    Sexual plant reproduction 2 (1989), S. 193-198 
    Details
    ISSN: 1432-2145
    Keywords: Polymorphism ; Ultrastructure ; Pollen grains ; Canna indica L ; Tannin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Our investigations on Canna indica L. indicate that the pollen of this species is polymorphic: there are two types of pollen — a larger type and a comparatively smaller type. Transmission electron microscopy (TEM) revealed the presence of small vacuoles containing tannic substances in the generative cell (GC) of the larger grains: the GC of the mature grain contained a higher quantity of tannins than the GC of the immature grain. Mitochondria, lipid bodies, rough endoplasmic reticulum (RER) and microtubular bundles were present in the cytoplasm of the GC. Numerous mitochondria, lipid bodies and plastids were also present in the vegetative cell (VC), with the mitochondria clustered around the vegetative nucleus. The plastids were observed to be associated with the RER cisterns. During the maturation process, the number of starch grains contained in the plastids decreased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192766
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Alcuni cenni sulla biologia del polline (1985)
    Springer
    Aerobiologia 1 (1985), S. 31-38 
    Details
    ISSN: 1573-3025
    Keywords: Pollen biology ; Aerobiology ; Allergology ; Biologia del polline ; Aerobiologia ; Allergologia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Riassunto Nel presente lavoro vengono riportati alcuni brevi cenni sulla biologia del polline. Viene descritto il processo di formazione del granulo pollinico e la sua dispersione con particolare riguardo alle piante anemofile. Vengono brevemente riportati anche alcuni dati sulla composizione chimica del polline.
    Notes: Summary In the present paper some data on the pollen biology are reported. The current knowledge on the pollen development, pollen dispersion in the wind pollination are shortly described. The chemical composition of some pollen grains are also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447693
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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