Reproduction in the Red Algae
Published
[San Francisco, California, USA] : Cytographics, 2000., Kanopy Streaming, 2016.
Status
Available Online
Description
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Format
Language
English
Notes
General Note
In Process Record.
General Note
Title from title frames.
General Note
Film
Date/Time and Place of Event
Originally produced by Cytographics in 2000.
Description
Reproduction in the red algae is unique. No flagellated stages are ever formed, and it is generally assumed that the various reproductive spores are inert. This video demonstrates that spores in many species are actively motile, either by gliding or amoeboid activity. This limited power of movement may turn out to be of considerable significance in survival strategies (e.g. dispersion, optimization of a germination site).. Sexual reproduction is also unique. The video briefly reviews the three-phase life cycle of red algae and then illustrates how sexual reproduction occurs. After release, male spermatia are passively carried to receptive female hairs, the trichogynes. Once attached, spermatia undergo a cycle of nuclear division (mitosis) without cell division. Then the wall between spermatium and trichogyne erodes away to form a fertilization pore. A little later, the two nuclei move through the pore into the trichogyne. We demonstrate that the behavior of the two nuclei is quite different. One (not always the first to emerge) moves toward the female cell for fertilization; the other moves toward the tip of the trichogyne where it appears to play no further role in reproduction. Thus, the two nuclei are subtly differentiated so as to interact with the motile systems of the trichogyne in different fashion..
System Details
Mode of access: World Wide Web.
Language
In English
Subjects
LC Subjects
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Citations
APA Citation, 7th Edition (style guide)
(2000). Reproduction in the Red Algae . Cytographics.
Chicago / Turabian - Author Date Citation, 17th Edition (style guide)2000. Reproduction in the Red Algae. Cytographics.
Chicago / Turabian - Humanities (Notes and Bibliography) Citation, 17th Edition (style guide)Reproduction in the Red Algae Cytographics, 2000.
MLA Citation, 9th Edition (style guide)Reproduction in the Red Algae Cytographics, 2000.
Note! Citations contain only title, author, edition, publisher, and year published. Citations should be used as a guideline and should be double checked for accuracy. Citation formats are based on standards as of August 2021.
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Grouped Work ID
fa4aa472-8703-2125-8085-2e5d971e6699-eng
Grouping Information
Grouped Work ID | fa4aa472-8703-2125-8085-2e5d971e6699-eng |
---|---|
Full title | reproduction in the red algae |
Author | cytographics |
Grouping Category | movie |
Last Update | 2024-10-08 10:55:34AM |
Last Indexed | 2024-12-03 03:37:01AM |
Book Cover Information
Image Source | default |
---|---|
First Loaded | Oct 16, 2024 |
Last Used | Oct 16, 2024 |
Marc Record
First Detected | Apr 25, 2023 01:02:27 PM |
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Last File Modification Time | Apr 25, 2023 01:02:27 PM |
Suppressed | Record had no items |
MARC Record
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520 | |a Reproduction in the red algae is unique. No flagellated stages are ever formed, and it is generally assumed that the various reproductive spores are inert. This video demonstrates that spores in many species are actively motile, either by gliding or amoeboid activity. This limited power of movement may turn out to be of considerable significance in survival strategies (e.g. dispersion, optimization of a germination site).. Sexual reproduction is also unique. The video briefly reviews the three-phase life cycle of red algae and then illustrates how sexual reproduction occurs. After release, male spermatia are passively carried to receptive female hairs, the trichogynes. Once attached, spermatia undergo a cycle of nuclear division (mitosis) without cell division. Then the wall between spermatium and trichogyne erodes away to form a fertilization pore. A little later, the two nuclei move through the pore into the trichogyne. We demonstrate that the behavior of the two nuclei is quite different. One (not always the first to emerge) moves toward the female cell for fertilization; the other moves toward the tip of the trichogyne where it appears to play no further role in reproduction. Thus, the two nuclei are subtly differentiated so as to interact with the motile systems of the trichogyne in different fashion.. | ||
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