A Note on the Fate of Tetrasporangial Stichidia in Hypnea Lamouroux after Spore Release

A Note on the Fate of Tetrasporangial Stichidia in Hypnea Lamouroux after Spore Release Introduction Hypnea Lamouroux is a widespread red alga on tropical and subtropical shores. Its asexual phase reproduces by zonately divided tetrasporangia which are borne at the bases of specialized fertile branchlets, the Stichidia (Fritsch 1945, Isaac and Hewitt 1953, Tanaka 1941). Dawson etal (1964) believed that the stichidial branchlets are determinate, implying that they are incapable of continued vegetative development. However, there appears to have been no attempt to prove this belief. The purpose of this note has been to provide additional evidence which would substantiate or disprove this supposition. Materials and Methods At the end of the cultural period the thalli were fixed in formalin and later their stichidial branchJets were examined and compared with those of the original samples fixed in formalin. This was done using a Zeiss compound microscope. Photomicrographs of the observed structures were taken with a Minolta SRT 101 camera and microscope adaptor. Results It was observed that after liberating their spores, the Stichidia undergo active growth and transform into normal vegetative branchlets- Even in unshaken cultures where some of the tetraspores germinated and started their development within the bases of the Stichidia (Figs. l and 2), there was a simultaneous vegetative development http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

A Note on the Fate of Tetrasporangial Stichidia in Hypnea Lamouroux after Spore Release

Botanica Marina, Volume 19 (5) – Jan 1, 1976

Loading next page...
 
/lp/de-gruyter/a-note-on-the-fate-of-tetrasporangial-stichidia-in-hypnea-lamouroux-0mgGtSXalq
Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1976.19.5.313
Publisher site
See Article on Publisher Site

Abstract

Introduction Hypnea Lamouroux is a widespread red alga on tropical and subtropical shores. Its asexual phase reproduces by zonately divided tetrasporangia which are borne at the bases of specialized fertile branchlets, the Stichidia (Fritsch 1945, Isaac and Hewitt 1953, Tanaka 1941). Dawson etal (1964) believed that the stichidial branchlets are determinate, implying that they are incapable of continued vegetative development. However, there appears to have been no attempt to prove this belief. The purpose of this note has been to provide additional evidence which would substantiate or disprove this supposition. Materials and Methods At the end of the cultural period the thalli were fixed in formalin and later their stichidial branchJets were examined and compared with those of the original samples fixed in formalin. This was done using a Zeiss compound microscope. Photomicrographs of the observed structures were taken with a Minolta SRT 101 camera and microscope adaptor. Results It was observed that after liberating their spores, the Stichidia undergo active growth and transform into normal vegetative branchlets- Even in unshaken cultures where some of the tetraspores germinated and started their development within the bases of the Stichidia (Figs. l and 2), there was a simultaneous vegetative development

Journal

Botanica Marinade Gruyter

Published: Jan 1, 1976

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off