Spermidine and spermatid differentiation of Marsilea vestita
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چکیده
منابع مشابه
The fine structure of fertilization in the fern Marsilea vestita.
The ultrastructural details of fertilization in the fern Marsilea vestita, including gamete approach and fusion, the fate of the spermatozoid organelles and the development of a possible block to polyspermy are described. The spermatozoid approaches the egg through layers of mucilage that surround the megaspores. It moves down the neck of the archegonium into the cavity above the egg. In order ...
متن کاملSpermidine is a morphogenetic determinant for cell fate specification in the male gametophyte of the water fern Marsilea vestita.
Here, we show that the polyamine spermidine plays a key role as a morphogenetic determinant during spermatid development in the water fern Marsilea vestita. Spermidine levels rise first in sterile jacket cells and then increase dramatically in spermatogenous cells as the spermatids mature. RNA interference and drug treatments were employed to deplete spermidine in the gametophyte at different s...
متن کاملSpermidine Is a Morphogenetic Determinant for Cell Fate Specification in the Male Gametophyte of the Water Fern Marsilea vestita W OA
Here, we show that the polyamine spermidine plays a key role as a morphogenetic determinant during spermatid development in the water fern Marsilea vestita. Spermidine levels rise first in sterile jacket cells and then increase dramatically in spermatogenous cells as the spermatids mature. RNA interference and drug treatments were employed to deplete spermidine in the gametophyte at different s...
متن کاملBinding of Tetrahymena dynein to axonemes of Marsilea vestita lacking the outer dynein arm.
Axonemes from the heterosporous water fern Marsilea vestita were fixed in the presence of tannic acid and examined by thin-section electron microscopy. Transverse sections revealed the normal 9+2 configuration except for the absence of the outer of the two dynein arms. Both arms were normally preserved in parallel preparations of Chlamydomonas axonemes. Isolated dynein from the ciliated protozo...
متن کاملKinesin Motor Proteins Are Essential for Male Gametophyte Development in Marsilea Vestita
Title of Dissertation: KINESIN MOTOR PROTEINS ARE ESSENTIAL FOR MALE GAMETOPHYTE DEVELOPMENT IN MARSILEA VESTITA Erika Jean Tomei, Doctor of Philosophy, 2016 Dissertation directed by: Professor Stephen M. Wolniak, Department of Cell Biology and Molecular Genetics The male gametophyte of the semi-aquatic fern, Marsilea vestita, produces multiciliated spermatozoids in a rapid developmental sequen...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 2008
ISSN: 0012-1606
DOI: 10.1016/j.ydbio.2008.05.075