Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae)
The duration of preformation and the seasonal pattern of development were studied in the architecturally complex alpine perennial Acomastylis rossii. Each leaf and inflorescence requires 3 yr to progress from initiation through structural and functional maturity to senescence. As a consequence, thre...
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crwiley:10.2307/2657079 2024-09-30T14:31:15+00:00 Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) Meloche, Christopher G. Diggle, Pamela K. 2001 http://dx.doi.org/10.2307/2657079 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2657079 http://onlinelibrary.wiley.com/wol1/doi/10.2307/2657079/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 88, issue 6, page 980-991 ISSN 0002-9122 1537-2197 journal-article 2001 crwiley https://doi.org/10.2307/2657079 2024-09-19T04:17:32Z The duration of preformation and the seasonal pattern of development were studied in the architecturally complex alpine perennial Acomastylis rossii. Each leaf and inflorescence requires 3 yr to progress from initiation through structural and functional maturity to senescence. As a consequence, three cohorts of preformed organs, initiated in successive years, are borne simultaneously by each individual plant. The oldest cohort matures immediately following snowmelt, after which no additional leaves are matured until the following spring. A second cohort remains below ground in the apical bud and continues development, while a third cohort is initiated. Initiation and development of primordia proceed below ground throughout the summer and continue for at least 2.5 mo after aboveground structures have senesced. Acomastylis rossii maintains numerous dormant vegetative buds containing preformed leaf primordia in the axils of senesced leaves. Developmental preformation has been widely reported in arctic and alpine tundra environments and has been theorized to severely constrain rapid responses to environmental variation. The presence of many such preformed structures may mitigate some of the constraint on plant response to environmental variation imposed by the long developmental trajectories of leaves and inflorescences in apical buds. Article in Journal/Newspaper Arctic Tundra Wiley Online Library Arctic American Journal of Botany 88 6 980 991 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The duration of preformation and the seasonal pattern of development were studied in the architecturally complex alpine perennial Acomastylis rossii. Each leaf and inflorescence requires 3 yr to progress from initiation through structural and functional maturity to senescence. As a consequence, three cohorts of preformed organs, initiated in successive years, are borne simultaneously by each individual plant. The oldest cohort matures immediately following snowmelt, after which no additional leaves are matured until the following spring. A second cohort remains below ground in the apical bud and continues development, while a third cohort is initiated. Initiation and development of primordia proceed below ground throughout the summer and continue for at least 2.5 mo after aboveground structures have senesced. Acomastylis rossii maintains numerous dormant vegetative buds containing preformed leaf primordia in the axils of senesced leaves. Developmental preformation has been widely reported in arctic and alpine tundra environments and has been theorized to severely constrain rapid responses to environmental variation. The presence of many such preformed structures may mitigate some of the constraint on plant response to environmental variation imposed by the long developmental trajectories of leaves and inflorescences in apical buds. |
format |
Article in Journal/Newspaper |
author |
Meloche, Christopher G. Diggle, Pamela K. |
spellingShingle |
Meloche, Christopher G. Diggle, Pamela K. Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) |
author_facet |
Meloche, Christopher G. Diggle, Pamela K. |
author_sort |
Meloche, Christopher G. |
title |
Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) |
title_short |
Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) |
title_full |
Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) |
title_fullStr |
Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) |
title_full_unstemmed |
Preformation, architectural complexity, and developmental flexibility in Acomastylis rossii (Rosaceae) |
title_sort |
preformation, architectural complexity, and developmental flexibility in acomastylis rossii (rosaceae) |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.2307/2657079 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2657079 http://onlinelibrary.wiley.com/wol1/doi/10.2307/2657079/fullpdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
American Journal of Botany volume 88, issue 6, page 980-991 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/2657079 |
container_title |
American Journal of Botany |
container_volume |
88 |
container_issue |
6 |
container_start_page |
980 |
op_container_end_page |
991 |
_version_ |
1811635876577411072 |