Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae)
Spaciinodum collinsonii , a Triassic sphenophyte from the central Transantarctic Mountains, Antarctica, is reinterpreted based on new material in order to clarify discrepancies from previous work and to detail the development and ecology of the Spaciinodum plant. Vegetative stems have alternating no...
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crwiley:10.3732/ajb.0800215 2024-09-15T17:46:34+00:00 Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) Ryberg, Patricia E. Hermsen, Elizabeth J. Taylor, Edith L. Taylor, Thomas N. Osborn, Jeffrey M. National Science Foundation 2008 http://dx.doi.org/10.3732/ajb.0800215 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.0800215 https://onlinelibrary.wiley.com/doi/pdf/10.3732/ajb.0800215 https://onlinelibrary.wiley.com/doi/full-xml/10.3732/ajb.0800215 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 95, issue 11, page 1443-1453 ISSN 0002-9122 1537-2197 journal-article 2008 crwiley https://doi.org/10.3732/ajb.0800215 2024-07-18T04:26:13Z Spaciinodum collinsonii , a Triassic sphenophyte from the central Transantarctic Mountains, Antarctica, is reinterpreted based on new material in order to clarify discrepancies from previous work and to detail the development and ecology of the Spaciinodum plant. Vegetative stems have alternating nodes and internodes, nodes distinguished by a solid diaphragm of tissue, internodes by the presence of vallecular (cortical) and carinal canals, and a hollow pith. Whorls of branches arise immediately above the nodes, alternating with the leaves of the subjacent nodes. Branches develop in the cortex and are anatomically similar to the stems. While Spaciinodum is similar to extant Equisetum , it is distinctive in that its large vallecular canals form a complete ring within the cortex and are separated only by thin fimbrils of tissue. The majority of specimens of Spaciinodum are now believed to be dormant buds with condensed nodes and internodes, with progressively longer internodal regions more basally. More apical portions of buds have cellular internodes because the areas where the canals will form have not yet ruptured from elongation. The abundance of buds and the absence of elongated stems in the permineralized peat deposit suggest that Spaciinodum underwent dormancy during the dark Antarctic winters. Article in Journal/Newspaper Antarc* Antarctic Antarctica Wiley Online Library American Journal of Botany 95 11 1443 1453 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Spaciinodum collinsonii , a Triassic sphenophyte from the central Transantarctic Mountains, Antarctica, is reinterpreted based on new material in order to clarify discrepancies from previous work and to detail the development and ecology of the Spaciinodum plant. Vegetative stems have alternating nodes and internodes, nodes distinguished by a solid diaphragm of tissue, internodes by the presence of vallecular (cortical) and carinal canals, and a hollow pith. Whorls of branches arise immediately above the nodes, alternating with the leaves of the subjacent nodes. Branches develop in the cortex and are anatomically similar to the stems. While Spaciinodum is similar to extant Equisetum , it is distinctive in that its large vallecular canals form a complete ring within the cortex and are separated only by thin fimbrils of tissue. The majority of specimens of Spaciinodum are now believed to be dormant buds with condensed nodes and internodes, with progressively longer internodal regions more basally. More apical portions of buds have cellular internodes because the areas where the canals will form have not yet ruptured from elongation. The abundance of buds and the absence of elongated stems in the permineralized peat deposit suggest that Spaciinodum underwent dormancy during the dark Antarctic winters. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Ryberg, Patricia E. Hermsen, Elizabeth J. Taylor, Edith L. Taylor, Thomas N. Osborn, Jeffrey M. |
spellingShingle |
Ryberg, Patricia E. Hermsen, Elizabeth J. Taylor, Edith L. Taylor, Thomas N. Osborn, Jeffrey M. Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) |
author_facet |
Ryberg, Patricia E. Hermsen, Elizabeth J. Taylor, Edith L. Taylor, Thomas N. Osborn, Jeffrey M. |
author_sort |
Ryberg, Patricia E. |
title |
Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) |
title_short |
Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) |
title_full |
Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) |
title_fullStr |
Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) |
title_full_unstemmed |
Development and ecological implications of dormant buds in the high‐Paleolaltitude Triassic sphenophyte Spaciinodum (Equisetaceae) |
title_sort |
development and ecological implications of dormant buds in the high‐paleolaltitude triassic sphenophyte spaciinodum (equisetaceae) |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.3732/ajb.0800215 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.0800215 https://onlinelibrary.wiley.com/doi/pdf/10.3732/ajb.0800215 https://onlinelibrary.wiley.com/doi/full-xml/10.3732/ajb.0800215 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
American Journal of Botany volume 95, issue 11, page 1443-1453 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.0800215 |
container_title |
American Journal of Botany |
container_volume |
95 |
container_issue |
11 |
container_start_page |
1443 |
op_container_end_page |
1453 |
_version_ |
1810494827254513664 |