ISSN:
1432-203X
Keywords:
Pollen
;
Wall
;
Aperture
;
Microchannels
;
Lanthanum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary In order to study the behavior of the exine as a site of passage of material from the locule of the anther, lanthanum nitrate was used to locate the possible routes of communication between the Olea europaea L. pollen grain and its external environment from the period of exine consolidation until dehiscence of the anther. In all four stages of development studied, dense lanthanum deposits occupied microchannel-like orifices, whereas these dense deposits occupied the apertural regions only in the first stages of development. Lanthanum precipitate is also present in the endexine, intine and cytoplasmic vesicles of mature pollen. The transportational function of the apertures is discussed in relation to the presence of dense lanthanum deposits in some stages of pollen grain.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00269989
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