Cargando…
Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer
Leaf traces are important structures in higher plants that connect leaves and the stem vascular system. The anatomy and emission pattern of leaf traces are well studied in extant vascular plants, but remain poorly understood in fossil lineages. We quantitatively analysed the leaf traces in the late...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510520/ https://www.ncbi.nlm.nih.gov/pubmed/26198410 http://dx.doi.org/10.1038/srep12405 |
_version_ | 1782382183770488832 |
---|---|
author | Wei, Hai-Bo Feng, Zhuo Yang, Ji-Yuan Chen, Yu-Xuan Shen, Jia-Jia He, Xiao-Yuan |
author_facet | Wei, Hai-Bo Feng, Zhuo Yang, Ji-Yuan Chen, Yu-Xuan Shen, Jia-Jia He, Xiao-Yuan |
author_sort | Wei, Hai-Bo |
collection | PubMed |
description | Leaf traces are important structures in higher plants that connect leaves and the stem vascular system. The anatomy and emission pattern of leaf traces are well studied in extant vascular plants, but remain poorly understood in fossil lineages. We quantitatively analysed the leaf traces in the late Permian conifer Ningxiaites specialis from Northwest China based on serial sections through pith, primary and secondary xylems. A complete leaf traces emission pattern of a conifer is presented for the first time from the late Palaeozoic. Three to five monarch leaf traces are grouped in clusters, arranged in a helical phyllotaxis. The leaf traces in each cluster can be divided into upper, middle and lower portions, and initiate at the pith periphery and cross the wood horizontally. The upper leaf trace increases its diameter during the first growth increment and then diminishes completely, which indicates leaf abscission at the end of the first year. The middle trace immediately bifurcates once or twice to form two or three vascular bundles. The lower trace persists as a single bundle during its entire length. The intricate leaf trace dynamics indicates this fossil plant had a novel evolutionary habit by promoting photosynthetic capability for the matured plant. |
format | Online Article Text |
id | pubmed-4510520 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-45105202015-07-28 Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer Wei, Hai-Bo Feng, Zhuo Yang, Ji-Yuan Chen, Yu-Xuan Shen, Jia-Jia He, Xiao-Yuan Sci Rep Article Leaf traces are important structures in higher plants that connect leaves and the stem vascular system. The anatomy and emission pattern of leaf traces are well studied in extant vascular plants, but remain poorly understood in fossil lineages. We quantitatively analysed the leaf traces in the late Permian conifer Ningxiaites specialis from Northwest China based on serial sections through pith, primary and secondary xylems. A complete leaf traces emission pattern of a conifer is presented for the first time from the late Palaeozoic. Three to five monarch leaf traces are grouped in clusters, arranged in a helical phyllotaxis. The leaf traces in each cluster can be divided into upper, middle and lower portions, and initiate at the pith periphery and cross the wood horizontally. The upper leaf trace increases its diameter during the first growth increment and then diminishes completely, which indicates leaf abscission at the end of the first year. The middle trace immediately bifurcates once or twice to form two or three vascular bundles. The lower trace persists as a single bundle during its entire length. The intricate leaf trace dynamics indicates this fossil plant had a novel evolutionary habit by promoting photosynthetic capability for the matured plant. Nature Publishing Group 2015-07-22 /pmc/articles/PMC4510520/ /pubmed/26198410 http://dx.doi.org/10.1038/srep12405 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Wei, Hai-Bo Feng, Zhuo Yang, Ji-Yuan Chen, Yu-Xuan Shen, Jia-Jia He, Xiao-Yuan Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer |
title | Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer |
title_full | Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer |
title_fullStr | Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer |
title_full_unstemmed | Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer |
title_short | Specialised emission pattern of leaf trace in a late Permian (253 million-years old) conifer |
title_sort | specialised emission pattern of leaf trace in a late permian (253 million-years old) conifer |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510520/ https://www.ncbi.nlm.nih.gov/pubmed/26198410 http://dx.doi.org/10.1038/srep12405 |
work_keys_str_mv | AT weihaibo specialisedemissionpatternofleaftraceinalatepermian253millionyearsoldconifer AT fengzhuo specialisedemissionpatternofleaftraceinalatepermian253millionyearsoldconifer AT yangjiyuan specialisedemissionpatternofleaftraceinalatepermian253millionyearsoldconifer AT chenyuxuan specialisedemissionpatternofleaftraceinalatepermian253millionyearsoldconifer AT shenjiajia specialisedemissionpatternofleaftraceinalatepermian253millionyearsoldconifer AT hexiaoyuan specialisedemissionpatternofleaftraceinalatepermian253millionyearsoldconifer |