Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Journal Article

Comparative Development of the Spermatozoids of Cycads and Ginkgo biloba

Knut J. Norstog, Ernest M. Gifford and Dennis Wm. Stevenson
Botanical Review
Vol. 70, No. 1 (Jan. - Mar., 2004), pp. 5-15
Published by: Springer on behalf of New York Botanical Garden Press
Stable URL: http://www.jstor.org/stable/27571170
Page Count: 11
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

Cancel
  • Read Online (Free)
  • Subscribe ($19.50)
  • Add to My Lists
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Comparative Development of the Spermatozoids of Cycads and Ginkgo biloba
Preview not available

Abstract

Cycads and Ginkgo biloba are the only extant seed plants that produce flagellated male gametes. Superficially, the cells of both are similar in structure and function. In both the motile organelles arise from multicentriolar bodies, the blepharoplasts, and, in both forms, these give rise to a complex fibrous band, the multilayered structures are much alike in cycads and Ginkgo. However, there are marked differences in details of their development, particularly in the presence of a "nucellar beak" in Ginkgo.

Page Thumbnails

  • Thumbnail: Page 
5
    5
  • Thumbnail: Page 
6
    6
  • Thumbnail: Page 
7
    7
  • Thumbnail: Page 
8
    8
  • Thumbnail: Page 
9
    9
  • Thumbnail: Page 
10
    10
  • Thumbnail: Page 
11
    11
  • Thumbnail: Page 
12
    12
  • Thumbnail: Page 
13
    13
  • Thumbnail: Page 
14
    14
  • Thumbnail: Page 
15
    15