ISSN:
1618-0860
Keywords:
Ceratophyllaceae
;
Ceratophyllum
;
Development
;
Pollen
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Developmental process of structure-less exine is studied in a hydrophilous plant,Ceratophyllum demersum L., with electron microscopy. The plant shows a characteristic feature in tetrad formation. A callose wall is not synthesized and exine initiation does not occur during the tetrad stage. After release of microspores, a trilaminar layer with two electron-dense lines is formed in the surface of each microspore. The trilaminar layer develops to a thin structure-less exine that is considered to consist of only an endexine. The unusual exine would be an adaptive feature for submersed pollination in fresh water.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02344345
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