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Desmarestia antarctica (Desmarestiales, Phaeophyceae), a new ligulate Antarctic species with an endophytic gametophyte

Desmarestia antarctica (Desmarestiales, Phaeophyceae), a new ligulate Antarctic species with an... Desmarestia antarctica Moe & Silva, a new species from the Antarctic Peninsula and the Scotia Arc, is distinguished from all other ligulate members of the genus by the arrangement of zoosporangia, which are produced together with paraphyses in a raised sorus. Among all species in the genus, onlyD. anceps Montagne shares this feature.Desmarestia antarctica is the first species of the genus for which an endophytic gametophyte is demonstrated, the usual host beingCurdiea racovitzae De Wildeman, a red alga of the familyGracilariaceae. The sporophyte contains only a moderate concentration of acid compared to Northern Hemisphere ligulate species, while physodes that probably contain polyphenolic compounds form noticeable speckles and dark margins in preserved plants. Often more than one axis arises from a single holdfast, probably as the result of compounding rather than proliferation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Systematics and Evolution Springer Journals

Desmarestia antarctica (Desmarestiales, Phaeophyceae), a new ligulate Antarctic species with an endophytic gametophyte

Moe, Richard; Silva, Paul
Plant Systematics and Evolution , Volume 164 (4) – Dec 20, 2005
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References (30)

Publisher
Springer Journals
Copyright
Copyright © 1989 by Springer-Verlag
Subject
Life Sciences; Plant Sciences; Plant Ecology; Plant Anatomy/Development; Plant Systematics/Taxonomy/Biogeography
ISSN
0378-2697
eISSN
2199-6881
DOI
10.1007/BF00940443
Publisher site
See Article on Publisher Site

Abstract

Desmarestia antarctica Moe & Silva, a new species from the Antarctic Peninsula and the Scotia Arc, is distinguished from all other ligulate members of the genus by the arrangement of zoosporangia, which are produced together with paraphyses in a raised sorus. Among all species in the genus, onlyD. anceps Montagne shares this feature.Desmarestia antarctica is the first species of the genus for which an endophytic gametophyte is demonstrated, the usual host beingCurdiea racovitzae De Wildeman, a red alga of the familyGracilariaceae. The sporophyte contains only a moderate concentration of acid compared to Northern Hemisphere ligulate species, while physodes that probably contain polyphenolic compounds form noticeable speckles and dark margins in preserved plants. Often more than one axis arises from a single holdfast, probably as the result of compounding rather than proliferation.

Journal

Plant Systematics and Evolution – Springer Journals

Published: Dec 20, 2005

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