Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats
• Background and Aims The leaf anatomy and ultrastructure of Deschampsia antarctica (Poaceae) plants growing in three different habitats (a dry site in the Antarctic tundra, a wet site in a zone exposed to sea spray and a greenhouse) were investigated. The ultrastructure of the leaves of D. antarcti...
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fthighwire:oai:open-archive.highwire.org:annbot:mci262v1 2023-05-15T13:32:57+02:00 Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats GIE WANOWSKA, IRENA SZCZUKA, EWA BEDNARA, JÓZEF GÓRECKI, RYSZARD 2005-09-12 03:41:08.0 text/html http://aob.oxfordjournals.org/cgi/content/short/mci262v1 https://doi.org/10.1093/aob/mci262 en eng Oxford University Press http://aob.oxfordjournals.org/cgi/content/short/mci262v1 http://dx.doi.org/10.1093/aob/mci262 Copyright (C) 2005, Oxford University Press Article TEXT 2005 fthighwire https://doi.org/10.1093/aob/mci262 2013-05-27T20:03:43Z • Background and Aims The leaf anatomy and ultrastructure of Deschampsia antarctica (Poaceae) plants growing in three different habitats (a dry site in the Antarctic tundra, a wet site in a zone exposed to sea spray and a greenhouse) were investigated. The ultrastructure of the leaves of D. antarctica has not been studied before. • Methods Semi-thin sections of the D. antarctica leaves were stained with toluidine blue and viewed using a light microscope. Ultra-thin sections stained with uranyl acetate and lead citrate were examined using a transmission electron microscope. • Key Results Plants growing in the Antarctic tundra and in a greenhouse had stronger xerophytic features than those growing at the seashore. The stress response of D. antarctica plants growing in the wet environment, exposed to high salinity and flooding, included: irregular mesophyll cells, large intercellular spaces in the parenchymatic layer, bulliform epidermal cells and vascular bundles surrounded with deformed outer and inner bundle sheaths of leaves. The highest number of sclerenchymatic fibres is characteristic of the leaves of plants growing in a greenhouse, whereas the smallest was of plants growing in a wet habitat. Stress conditions can disturb the formation of sclerenchymatic fibres. In plants growing in the Maritime Antarctic the chloroplasts of the mesophyll cells of leaves are of an irregular shape, with pockets or invaginations inside the organelles and outgrowths. Both of them make the surfaces of chloroplasts larger, and result in an increase in the amount of substances exchanged between the chloroplasts and cytoplasm or the other organelles. The leaf mesophyll cells of D. antarctica plants growing in Antarctica contain atypical structures including numerous vesicles of different sizes and concentrically arranged membranes. • Conclusions The anatomical and ultrastructural features of the leaf and their changes under stress conditions are considered in relation to the adaptations of D. antarctica to the climate conditions in ... Text Antarc* Antarctic Antarctica Tundra HighWire Press (Stanford University) Antarctic The Antarctic Annals of Botany 96 6 1109 1119 |
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Article GIE WANOWSKA, IRENA SZCZUKA, EWA BEDNARA, JÓZEF GÓRECKI, RYSZARD Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats |
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Article |
description |
• Background and Aims The leaf anatomy and ultrastructure of Deschampsia antarctica (Poaceae) plants growing in three different habitats (a dry site in the Antarctic tundra, a wet site in a zone exposed to sea spray and a greenhouse) were investigated. The ultrastructure of the leaves of D. antarctica has not been studied before. • Methods Semi-thin sections of the D. antarctica leaves were stained with toluidine blue and viewed using a light microscope. Ultra-thin sections stained with uranyl acetate and lead citrate were examined using a transmission electron microscope. • Key Results Plants growing in the Antarctic tundra and in a greenhouse had stronger xerophytic features than those growing at the seashore. The stress response of D. antarctica plants growing in the wet environment, exposed to high salinity and flooding, included: irregular mesophyll cells, large intercellular spaces in the parenchymatic layer, bulliform epidermal cells and vascular bundles surrounded with deformed outer and inner bundle sheaths of leaves. The highest number of sclerenchymatic fibres is characteristic of the leaves of plants growing in a greenhouse, whereas the smallest was of plants growing in a wet habitat. Stress conditions can disturb the formation of sclerenchymatic fibres. In plants growing in the Maritime Antarctic the chloroplasts of the mesophyll cells of leaves are of an irregular shape, with pockets or invaginations inside the organelles and outgrowths. Both of them make the surfaces of chloroplasts larger, and result in an increase in the amount of substances exchanged between the chloroplasts and cytoplasm or the other organelles. The leaf mesophyll cells of D. antarctica plants growing in Antarctica contain atypical structures including numerous vesicles of different sizes and concentrically arranged membranes. • Conclusions The anatomical and ultrastructural features of the leaf and their changes under stress conditions are considered in relation to the adaptations of D. antarctica to the climate conditions in ... |
format |
Text |
author |
GIE WANOWSKA, IRENA SZCZUKA, EWA BEDNARA, JÓZEF GÓRECKI, RYSZARD |
author_facet |
GIE WANOWSKA, IRENA SZCZUKA, EWA BEDNARA, JÓZEF GÓRECKI, RYSZARD |
author_sort |
GIE WANOWSKA, IRENA |
title |
Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats |
title_short |
Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats |
title_full |
Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats |
title_fullStr |
Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats |
title_full_unstemmed |
Anatomical Features and Ultrastructure of Deschampsia antarctica (Poaceae) Leaves from Different Growing Habitats |
title_sort |
anatomical features and ultrastructure of deschampsia antarctica (poaceae) leaves from different growing habitats |
publisher |
Oxford University Press |
publishDate |
2005 |
url |
http://aob.oxfordjournals.org/cgi/content/short/mci262v1 https://doi.org/10.1093/aob/mci262 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Tundra |
genre_facet |
Antarc* Antarctic Antarctica Tundra |
op_relation |
http://aob.oxfordjournals.org/cgi/content/short/mci262v1 http://dx.doi.org/10.1093/aob/mci262 |
op_rights |
Copyright (C) 2005, Oxford University Press |
op_doi |
https://doi.org/10.1093/aob/mci262 |
container_title |
Annals of Botany |
container_volume |
96 |
container_issue |
6 |
container_start_page |
1109 |
op_container_end_page |
1119 |
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1766037205517598720 |