Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri
On the cool, moist, extremely windy subantarctic islands, vegetation is treeless and mega‐herbs, tussock grasses, and cushion plants are the dominant plant growth forms. In world terms the subantarctic environment is an unusual one, and megaherbs are unusual plants which have some unusual anatomical...
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Language: | English |
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Melbourne, Vic., Taylor & Francis
2006
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ftunivwestsyd:oai:researchdirect.westernsydney.edu.au:uws_11022 2023-05-15T17:09:57+02:00 Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri Briggs, Candida L. (R9339) Selkirk, P. M. Bergstrom, Dana M. 2006 print 11 http://handle.uws.edu.au:8081/1959.7/506246 https://doi.org/10.1080/0028825X.2006.9513017 eng eng Melbourne, Vic., Taylor & Francis New Zealand Journal of Botany--0028825X Vol. 44 Issue. 2 pp: 187-197 0607 - Plant Biology pleurophyllum hookeri plant anatomy journal article 2006 ftunivwestsyd https://doi.org/10.1080/0028825X.2006.9513017 2020-12-05T17:39:36Z On the cool, moist, extremely windy subantarctic islands, vegetation is treeless and mega‐herbs, tussock grasses, and cushion plants are the dominant plant growth forms. In world terms the subantarctic environment is an unusual one, and megaherbs are unusual plants which have some unusual anatomical features. On Macquarie Island the megaherb Pleurophyllum hookeri has a vertical contractile stem, largely underground, which maintains the plant's rosette of large leaves close to the ground surface. Stem contraction is associated with reduction in cell volume and increase in wall thickness of pith cells, and greater contraction of inner cortical than outer cortical cells. The network of vascular tissue adjusts to the dimensions of the contracted stem without disruption but the outer surface of the stem becomes wrinkled. We believe this to be the first record and description of permanent contraction of extensive stem tissue in an angiosperm. Article in Journal/Newspaper Macquarie Island University of Western Sydney (UWS): Research Direct New Zealand Journal of Botany 44 2 187 197 |
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Open Polar |
collection |
University of Western Sydney (UWS): Research Direct |
op_collection_id |
ftunivwestsyd |
language |
English |
topic |
0607 - Plant Biology pleurophyllum hookeri plant anatomy |
spellingShingle |
0607 - Plant Biology pleurophyllum hookeri plant anatomy Briggs, Candida L. (R9339) Selkirk, P. M. Bergstrom, Dana M. Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri |
topic_facet |
0607 - Plant Biology pleurophyllum hookeri plant anatomy |
description |
On the cool, moist, extremely windy subantarctic islands, vegetation is treeless and mega‐herbs, tussock grasses, and cushion plants are the dominant plant growth forms. In world terms the subantarctic environment is an unusual one, and megaherbs are unusual plants which have some unusual anatomical features. On Macquarie Island the megaherb Pleurophyllum hookeri has a vertical contractile stem, largely underground, which maintains the plant's rosette of large leaves close to the ground surface. Stem contraction is associated with reduction in cell volume and increase in wall thickness of pith cells, and greater contraction of inner cortical than outer cortical cells. The network of vascular tissue adjusts to the dimensions of the contracted stem without disruption but the outer surface of the stem becomes wrinkled. We believe this to be the first record and description of permanent contraction of extensive stem tissue in an angiosperm. |
format |
Article in Journal/Newspaper |
author |
Briggs, Candida L. (R9339) Selkirk, P. M. Bergstrom, Dana M. |
author_facet |
Briggs, Candida L. (R9339) Selkirk, P. M. Bergstrom, Dana M. |
author_sort |
Briggs, Candida L. (R9339) |
title |
Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri |
title_short |
Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri |
title_full |
Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri |
title_fullStr |
Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri |
title_full_unstemmed |
Facing the furious fifties : the contractile stem of the subantarctic megaherb Pleurophyllum hookeri |
title_sort |
facing the furious fifties : the contractile stem of the subantarctic megaherb pleurophyllum hookeri |
publisher |
Melbourne, Vic., Taylor & Francis |
publishDate |
2006 |
url |
http://handle.uws.edu.au:8081/1959.7/506246 https://doi.org/10.1080/0028825X.2006.9513017 |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_relation |
New Zealand Journal of Botany--0028825X Vol. 44 Issue. 2 pp: 187-197 |
op_doi |
https://doi.org/10.1080/0028825X.2006.9513017 |
container_title |
New Zealand Journal of Botany |
container_volume |
44 |
container_issue |
2 |
container_start_page |
187 |
op_container_end_page |
197 |
_version_ |
1766066324243480576 |