ISSN:
1615-6102
Keywords:
Meiosis
;
Microtubules
;
Polarity
;
Ultrastructure
;
Mosses
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary An extensive system of microtubules develops during meiotic prophase in the mossRhynchostegium serrulatum (Hedw.)Jaeg. &Sauerb. Development of the cytoskeleton can be traced to early prophase when the nucleus is acentric and the single plastid divides into four plastids. The cytoskeletal microtubules are associated with equidistant positioning of the four plastids at the distal tetrad poles and with migration of the nucleus to a central position in the sporocyte. The cytoskeleton, which interconnects plastids and encloses the nucleus, contributes to the establishment of moss sporocyte polarity. Just prior to metaphase I evidence of the prophase cytoskeleton is lost as the bipolar metaphase I spindle develops in association with discrete polar organizers located in opposite cleavage furrows between plastids.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01314678
