CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA
Studies of laboratory cultures of Chordaria linearis (Hooker et Harvey) Cotton from southernmost South America revealed that this species has an obligate sexual life history in which a macroscopic sporophyte alternates with a monoecious microscopic gametophyte. Sexual reproduction is isogamous and u...
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1992
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ftunigroningenpu:oai:pure.rug.nl:publications/3d2b778e-d7fa-43ef-a0e2-40bdf62f6c17 2023-05-15T15:05:07+02:00 CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA PETERS, AF 1992-10 http://hdl.handle.net/11370/3d2b778e-d7fa-43ef-a0e2-40bdf62f6c17 https://research.rug.nl/en/publications/culture-studies-on-the-lifehistory-of-chordarialinearis-phaeophyceae-from-tierradelfuego-southamerica(3d2b778e-d7fa-43ef-a0e2-40bdf62f6c17).html eng eng info:eu-repo/semantics/restrictedAccess PETERS , AF 1992 , ' CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA ' , Journal of Phycology , vol. 28 , no. 5 , pp. 678-683 . ISSN:0022-3646 CHORDARIA-LINEARIS EPIPHYTE LIFE HISTORY PHAEOPHYCEAE PHOTOPERIOD SEXUALITY SOUTH-AMERICA TRACHYNEMA-GROENLANDICUM SYSTEMATIC POSITION SEXUAL REPRODUCTION ALGAE LAMINARIALES NOV article 1992 ftunigroningenpu 2022-01-22T18:30:39Z Studies of laboratory cultures of Chordaria linearis (Hooker et Harvey) Cotton from southernmost South America revealed that this species has an obligate sexual life history in which a macroscopic sporophyte alternates with a monoecious microscopic gametophyte. Sexual reproduction is isogamous and under photoperiodic control. Gametes are produced only in short days, whereas in long days, asexual zoospores are formed that recycle the gametophyte generation. Unfused gametes develop into gametophytes, and sporophytes originate only from zygotes. Unlike other sexual members of the Chordariales, gametes of C. linearis have a reduced stigma and do not show phototaxis. They are released at the beginning of the night, not in the morning. In nature, C. linearis seems to be regularly infected by a dictyosiphonalean epiphyte resembling the rare arctic species Trachynema groenlandicum (Lund) Pedersen. The epiphyte is responsible for previous contradictory results obtained in laboratory cultures of C. linearis. This is the first record of Trachynema in the southern hemisphere. Article in Journal/Newspaper Arctic Tierra del Fuego University of Groningen research database Arctic Hooker ENVELOPE(-62.050,-62.050,-63.283,-63.283) Pedersen ENVELOPE(140.013,140.013,-66.668,-66.668) |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
CHORDARIA-LINEARIS EPIPHYTE LIFE HISTORY PHAEOPHYCEAE PHOTOPERIOD SEXUALITY SOUTH-AMERICA TRACHYNEMA-GROENLANDICUM SYSTEMATIC POSITION SEXUAL REPRODUCTION ALGAE LAMINARIALES NOV |
spellingShingle |
CHORDARIA-LINEARIS EPIPHYTE LIFE HISTORY PHAEOPHYCEAE PHOTOPERIOD SEXUALITY SOUTH-AMERICA TRACHYNEMA-GROENLANDICUM SYSTEMATIC POSITION SEXUAL REPRODUCTION ALGAE LAMINARIALES NOV PETERS, AF CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA |
topic_facet |
CHORDARIA-LINEARIS EPIPHYTE LIFE HISTORY PHAEOPHYCEAE PHOTOPERIOD SEXUALITY SOUTH-AMERICA TRACHYNEMA-GROENLANDICUM SYSTEMATIC POSITION SEXUAL REPRODUCTION ALGAE LAMINARIALES NOV |
description |
Studies of laboratory cultures of Chordaria linearis (Hooker et Harvey) Cotton from southernmost South America revealed that this species has an obligate sexual life history in which a macroscopic sporophyte alternates with a monoecious microscopic gametophyte. Sexual reproduction is isogamous and under photoperiodic control. Gametes are produced only in short days, whereas in long days, asexual zoospores are formed that recycle the gametophyte generation. Unfused gametes develop into gametophytes, and sporophytes originate only from zygotes. Unlike other sexual members of the Chordariales, gametes of C. linearis have a reduced stigma and do not show phototaxis. They are released at the beginning of the night, not in the morning. In nature, C. linearis seems to be regularly infected by a dictyosiphonalean epiphyte resembling the rare arctic species Trachynema groenlandicum (Lund) Pedersen. The epiphyte is responsible for previous contradictory results obtained in laboratory cultures of C. linearis. This is the first record of Trachynema in the southern hemisphere. |
format |
Article in Journal/Newspaper |
author |
PETERS, AF |
author_facet |
PETERS, AF |
author_sort |
PETERS, AF |
title |
CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA |
title_short |
CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA |
title_full |
CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA |
title_fullStr |
CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA |
title_full_unstemmed |
CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA |
title_sort |
culture studies on the life-history of chordaria-linearis (phaeophyceae) from tierra-del-fuego, south-america |
publishDate |
1992 |
url |
http://hdl.handle.net/11370/3d2b778e-d7fa-43ef-a0e2-40bdf62f6c17 https://research.rug.nl/en/publications/culture-studies-on-the-lifehistory-of-chordarialinearis-phaeophyceae-from-tierradelfuego-southamerica(3d2b778e-d7fa-43ef-a0e2-40bdf62f6c17).html |
long_lat |
ENVELOPE(-62.050,-62.050,-63.283,-63.283) ENVELOPE(140.013,140.013,-66.668,-66.668) |
geographic |
Arctic Hooker Pedersen |
geographic_facet |
Arctic Hooker Pedersen |
genre |
Arctic Tierra del Fuego |
genre_facet |
Arctic Tierra del Fuego |
op_source |
PETERS , AF 1992 , ' CULTURE STUDIES ON THE LIFE-HISTORY OF CHORDARIA-LINEARIS (PHAEOPHYCEAE) FROM TIERRA-DEL-FUEGO, SOUTH-AMERICA ' , Journal of Phycology , vol. 28 , no. 5 , pp. 678-683 . ISSN:0022-3646 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766336872058978304 |