New ultrastructural and physiological features of the thallus in Antarctic lichens
The paper describes anatomical and physiological features of photobionts and mycobionts in Bryoria forsteri Olech & Bystrek, Caloplaca regalis (Vain.) Zahlbr., Cetraria aculeata (Schreb.) Fr., Ramalina terebrata Hook f. & Taylor, Sphaerophorus globosus (Huds.) Vain. and Usnea antarctica Du R...
Published in: | Acta Biologica Cracoviensia Series Botanica |
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ftjagiellonuniir:oai:ruj.uj.edu.pl:item/29201 2024-05-19T07:30:41+00:00 New ultrastructural and physiological features of the thallus in Antarctic lichens Giełwanowska, Irena Olech, Maria 2012 http://ruj.uj.edu.pl/xmlui/handle/item/29201 https://doi.org/10.2478/v10182-012-0004-0 http://journals.pan.pl/dlibra/publication/94731/edition/81752/content eng eng Acta Biologica Cracoviensia. Series Botanica, T. 54, nr 1, s. 40-52 0001-5296 1898-0295 doi:10.2478/v10182-012-0004-0 http://ruj.uj.edu.pl/xmlui/handle/item/29201 http://journals.pan.pl/dlibra/publication/94731/edition/81752/content Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 3.0 Polska http://creativecommons.org/licenses/by-nc-nd/3.0/pl/legalcode Antarctic lichens Bryoria forsteri Caloplaca regalis Cetraria aculeata Ramalina terebrata Sphaerophorus globosus Usnea antarctica morphology ultrastructure artykuł w czasopiśmie 2012 ftjagiellonuniir https://doi.org/10.2478/v10182-012-0004-0 2024-04-19T00:13:50Z The paper describes anatomical and physiological features of photobionts and mycobionts in Bryoria forsteri Olech & Bystrek, Caloplaca regalis (Vain.) Zahlbr., Cetraria aculeata (Schreb.) Fr., Ramalina terebrata Hook f. & Taylor, Sphaerophorus globosus (Huds.) Vain. and Usnea antarctica Du Rietz, collected in the Antarctic under varied weather conditions. Green algae from the genera Lobosphaera and Trebouxia were gathered in depressions of the cortex under the more resistant mycobiont hyphae. In photobiont cells a large amount of highly osmiophilic electron-dense PAS-negative material, lipid-like in character, was of particular interest. Similar material also filled certain areas of the aerial apoplast. A star-shaped chromatophore with central and lateral pyrenoids encompassed most of the photobiont protoplast in all the studied species. Regularly arranged thylakoids with evenly widened lumina along their entire length and osmiophilic lipid droplets adhering to their outer surfaces were visible within the pyrenoid. Inside the chloroplast, large protein inclusions tightly joined with the thylakoids were observed. The mycobionts were closely attached to each other another and with the photobionts by means of an outer osmiophilic wall layer, and formed intramural haustoria. Their protoplasts were filled with PAS-positive polysaccharides and a large amount of lipid-like substances. The photobionts were physiologically active and produced a large amount of electron-dense osmiophilic material, and PAS-positive starch grains were visible around their pyrenoids in the thalli collected in different weather conditions. The permanent reserves of nutritive materials deposited in the thalli enable these organisms to quickly begin and continue indispensable physiological processes in the extreme Antarctic conditions. Article in Journal/Newspaper Antarc* Antarctic Antarctica Usnea antarctica Jagiellonian University Repository Acta Biologica Cracoviensia Series Botanica 54 1 |
institution |
Open Polar |
collection |
Jagiellonian University Repository |
op_collection_id |
ftjagiellonuniir |
language |
English |
topic |
Antarctic lichens Bryoria forsteri Caloplaca regalis Cetraria aculeata Ramalina terebrata Sphaerophorus globosus Usnea antarctica morphology ultrastructure |
spellingShingle |
Antarctic lichens Bryoria forsteri Caloplaca regalis Cetraria aculeata Ramalina terebrata Sphaerophorus globosus Usnea antarctica morphology ultrastructure Giełwanowska, Irena Olech, Maria New ultrastructural and physiological features of the thallus in Antarctic lichens |
topic_facet |
Antarctic lichens Bryoria forsteri Caloplaca regalis Cetraria aculeata Ramalina terebrata Sphaerophorus globosus Usnea antarctica morphology ultrastructure |
description |
The paper describes anatomical and physiological features of photobionts and mycobionts in Bryoria forsteri Olech & Bystrek, Caloplaca regalis (Vain.) Zahlbr., Cetraria aculeata (Schreb.) Fr., Ramalina terebrata Hook f. & Taylor, Sphaerophorus globosus (Huds.) Vain. and Usnea antarctica Du Rietz, collected in the Antarctic under varied weather conditions. Green algae from the genera Lobosphaera and Trebouxia were gathered in depressions of the cortex under the more resistant mycobiont hyphae. In photobiont cells a large amount of highly osmiophilic electron-dense PAS-negative material, lipid-like in character, was of particular interest. Similar material also filled certain areas of the aerial apoplast. A star-shaped chromatophore with central and lateral pyrenoids encompassed most of the photobiont protoplast in all the studied species. Regularly arranged thylakoids with evenly widened lumina along their entire length and osmiophilic lipid droplets adhering to their outer surfaces were visible within the pyrenoid. Inside the chloroplast, large protein inclusions tightly joined with the thylakoids were observed. The mycobionts were closely attached to each other another and with the photobionts by means of an outer osmiophilic wall layer, and formed intramural haustoria. Their protoplasts were filled with PAS-positive polysaccharides and a large amount of lipid-like substances. The photobionts were physiologically active and produced a large amount of electron-dense osmiophilic material, and PAS-positive starch grains were visible around their pyrenoids in the thalli collected in different weather conditions. The permanent reserves of nutritive materials deposited in the thalli enable these organisms to quickly begin and continue indispensable physiological processes in the extreme Antarctic conditions. |
format |
Article in Journal/Newspaper |
author |
Giełwanowska, Irena Olech, Maria |
author_facet |
Giełwanowska, Irena Olech, Maria |
author_sort |
Giełwanowska, Irena |
title |
New ultrastructural and physiological features of the thallus in Antarctic lichens |
title_short |
New ultrastructural and physiological features of the thallus in Antarctic lichens |
title_full |
New ultrastructural and physiological features of the thallus in Antarctic lichens |
title_fullStr |
New ultrastructural and physiological features of the thallus in Antarctic lichens |
title_full_unstemmed |
New ultrastructural and physiological features of the thallus in Antarctic lichens |
title_sort |
new ultrastructural and physiological features of the thallus in antarctic lichens |
publishDate |
2012 |
url |
http://ruj.uj.edu.pl/xmlui/handle/item/29201 https://doi.org/10.2478/v10182-012-0004-0 http://journals.pan.pl/dlibra/publication/94731/edition/81752/content |
genre |
Antarc* Antarctic Antarctica Usnea antarctica |
genre_facet |
Antarc* Antarctic Antarctica Usnea antarctica |
op_relation |
Acta Biologica Cracoviensia. Series Botanica, T. 54, nr 1, s. 40-52 0001-5296 1898-0295 doi:10.2478/v10182-012-0004-0 http://ruj.uj.edu.pl/xmlui/handle/item/29201 http://journals.pan.pl/dlibra/publication/94731/edition/81752/content |
op_rights |
Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 3.0 Polska http://creativecommons.org/licenses/by-nc-nd/3.0/pl/legalcode |
op_doi |
https://doi.org/10.2478/v10182-012-0004-0 |
container_title |
Acta Biologica Cracoviensia Series Botanica |
container_volume |
54 |
container_issue |
1 |
_version_ |
1799488601666355200 |