Jagiellonian University Repository
New ultrastructural and physiological features of the thallus in Antarctic lichens
Communities & Collections
pcg.skipToMenu
Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 3.0 Polska
New ultrastructural and physiological features of the thallus in Antarctic lichens
Bibliographic description
| title: | New ultrastructural and physiological features of the thallus in Antarctic lichens |
| author: | Giełwanowska Irena, Olech Maria 
|
| journal title: | Acta Biologica Cracoviensia. Series Botanica |
| volume: | 54 |
| issue: | 1 |
| date of publication : | 2012 |
| pages: | 40-52 |
| ISSN: |
0001-5296 |
| eISSN: |
1898-0295 |
| DOI: | |
| URL: |
http://journals.pan.pl/dlibra/publication/94731/edition/81752/content |
| date accessed: |
2019-02-26 |
| language: | English |
| journal language: | English |
| abstract in English: | 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. |
| keywords in English: | Antarctic lichens, Bryoria forsteri, Caloplaca regalis, Cetraria aculeata, Ramalina terebrata, Sphaerophorus globosus, Usnea antarctica, morphology, ultrastructure |
| affiliation: | Wydział Biologii i Nauk o Ziemi : Instytut Botaniki |
| type: | journal article |
| subtype: | academic paper |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 3.0 Polska
Projekt „Repozytorium otwartego dostępu do dorobku naukowego i dydaktycznego UJ” współfinansowany w ramach poddziałania 2.3.1 „Cyfrowe udostępnianie zasobów nauki” Programu Operacyjnego Polska Cyfrowa z Europejskiego Funduszu Rozwoju Regionalnego i budżetu państwa na podstawie umowy o dofinansowanie nr POPC.02.03.01-00-0030/17-00
