Send to

Choose Destination
See comment in PubMed Commons below
Cell Biol Int Rep. 1985 Sep;9(9):841-8.

Widespread absence of outer dynein arms in the spermatozoids of lower plants.


Transverse sections of flagellar axonemes from a variety of lower plant spermatozoids were examined by electron microscopy. Motile sperm of four ferns (Marsilea, Pteridium, Lygodium and Aneimia), a horsetail (Equisetum) and a liverwort (Marchantia) were fixed in the presence of tannic acid to visualise the dynein arms. In all cases the inner dynein arms were clearly resolved but the outer arms were absent. Absence of outer arms therefore appears to be a common feature of the archegoniate plants. The implications of these findings to our understanding of the evolution of the land plants and the role of the dynein arms in flagellar beating is discussed.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons


    Supplemental Content

    Loading ...
    Support Center