Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic
The ultrastructural examination by transmission electron microscopy of 45‐million‐year‐old mummified leaves of Metasequoia extracted from the Upper Coal member of the Buchanan Lake Formation in Napartulik on Axel Heiberg Island revealed the preservation of intact chloroplasts and chloroplast compone...
Published in: | American Journal of Botany |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2004
|
Subjects: | |
Online Access: | http://dx.doi.org/10.3732/ajb.91.6.816 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.91.6.816 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.91.6.816/fullpdf |
id |
crwiley:10.3732/ajb.91.6.816 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.3732/ajb.91.6.816 2024-09-15T17:56:51+00:00 Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic Schoenhut, Karimah Vann, David R. LePage, Ben A. Andrew W. Mellon Foundation 2004 http://dx.doi.org/10.3732/ajb.91.6.816 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.91.6.816 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.91.6.816/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 91, issue 6, page 816-824 ISSN 0002-9122 1537-2197 journal-article 2004 crwiley https://doi.org/10.3732/ajb.91.6.816 2024-08-27T04:32:20Z The ultrastructural examination by transmission electron microscopy of 45‐million‐year‐old mummified leaves of Metasequoia extracted from the Upper Coal member of the Buchanan Lake Formation in Napartulik on Axel Heiberg Island revealed the preservation of intact chloroplasts and chloroplast components. Abundant tanniferous cell inclusions may indicate that the 3‐mo period of constant daylight during the Artic summer induced high concentrations of tannins in the leaf tissues, which may have arrested microbial degradation of the litter. Quantified differences in the extent of chloroplast preservation through a vertical section of the lignite suggest that short‐term shifts in the depositional environment took place, perhaps influencing the exposure of the leaf tissues to conditions that would either promote or inhibit decomposition. Article in Journal/Newspaper Axel Heiberg Island Wiley Online Library American Journal of Botany 91 6 816 824 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The ultrastructural examination by transmission electron microscopy of 45‐million‐year‐old mummified leaves of Metasequoia extracted from the Upper Coal member of the Buchanan Lake Formation in Napartulik on Axel Heiberg Island revealed the preservation of intact chloroplasts and chloroplast components. Abundant tanniferous cell inclusions may indicate that the 3‐mo period of constant daylight during the Artic summer induced high concentrations of tannins in the leaf tissues, which may have arrested microbial degradation of the litter. Quantified differences in the extent of chloroplast preservation through a vertical section of the lignite suggest that short‐term shifts in the depositional environment took place, perhaps influencing the exposure of the leaf tissues to conditions that would either promote or inhibit decomposition. |
author2 |
Andrew W. Mellon Foundation |
format |
Article in Journal/Newspaper |
author |
Schoenhut, Karimah Vann, David R. LePage, Ben A. |
spellingShingle |
Schoenhut, Karimah Vann, David R. LePage, Ben A. Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic |
author_facet |
Schoenhut, Karimah Vann, David R. LePage, Ben A. |
author_sort |
Schoenhut, Karimah |
title |
Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic |
title_short |
Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic |
title_full |
Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic |
title_fullStr |
Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic |
title_full_unstemmed |
Cytological and ultrastructural preservation in Eocene Metasequoia leaves from the Canadian High Arctic |
title_sort |
cytological and ultrastructural preservation in eocene metasequoia leaves from the canadian high arctic |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.3732/ajb.91.6.816 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.91.6.816 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.91.6.816/fullpdf |
genre |
Axel Heiberg Island |
genre_facet |
Axel Heiberg Island |
op_source |
American Journal of Botany volume 91, issue 6, page 816-824 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.91.6.816 |
container_title |
American Journal of Botany |
container_volume |
91 |
container_issue |
6 |
container_start_page |
816 |
op_container_end_page |
824 |
_version_ |
1810433038100725760 |