| Autor: |
Nunes, Elaine Lopes Pereira, Bona, Cleusa, Moço, Maria Cecília de Chiara, Coan, Alessandra Ike |
| Předmět: |
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| Zdroj: |
Annals of Botany; Oct2009, Vol. 104 Issue 5, p1011-1015, 5p, 1 Color Photograph, 1 Black and White Photograph |
| Abstrakt: |
Background and Aims: Microsporogenesis in monocots is often characterized by successive cytokinesis with centrifugal cell plate formation. Pollen grains in monocots are predominantly monosulcate, but variation occurs, including the lack of apertures. The aperture pattern can be determined by microsporogenesis features such as the tetrad shape and the last sites of callose deposition among the microspores. Potamogeton belongs to the early divergent Potamogetonaceae and possesses inaperturate pollen, a type of pollen for which it has been suggested that there is a release of the constraint on tetrad shape. This study aimed to investigate the microsporogenesis and the ultrastructure of pollen wall in species of Potamogeton in order to better understand the relationship between microsporogenesis features and the inaperturate condition. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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