Studium fotobiontů lichenizovaného rodu Lepraria

My study is focused on green algal photobionts - lichenized algae from the genera Asterochloris and Trebouxia (the last was studied in a lesser extent). The principal objectives of the thesis can be characterized as follows: 1) to investigate the chloroplast morphology in lichenized algae Asterochlo...

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Main Author: Peksa, Ondřej
Other Authors: Neustupa, Jiří
Format: Doctoral Thesis
Language:English
Published: 2011
Online Access:http://www.nusl.cz/ntk/nusl-299535
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spelling ndltd-nusl.cz-oai-invenio.nusl.cz-2995352017-06-27T04:42:56Z Studium fotobiontů lichenizovaného rodu Lepraria Studium fotobiontů lichenizovaného rodu Lepraria Peksa, Ondřej Neustupa, Jiří Liška, Jiří Barreno Rodriguez, Eva My study is focused on green algal photobionts - lichenized algae from the genera Asterochloris and Trebouxia (the last was studied in a lesser extent). The principal objectives of the thesis can be characterized as follows: 1) to investigate the chloroplast morphology in lichenized algae Asterochloris and Trebouxia; 2) to study the photobiont diversity in lichen community growing in heavy metal polluted habitats; 3) to inventorize the photobionts in selected lichen taxa (Lepraria, Stereocaulon) in order to reveal their ecological requirements. Using confocal microscopy, significant differences in the chloroplast structure of lichenized and cultured (free-living) algae were detected. Moreover, algae exhibited gradual changes in chloroplast shape and structure during successive phases of cultivation - from the relatively simple lichenized form to the complex lobate chloroplast with several ontogenetic (morphological) stages observable in mature axenic cultures. Several Asterochloris lineages and one Trebouxia species were detected in terricolous lichen community from metal-polluted habitats using phylogenetic analysis of algal ITS sequences. All these lineages represented photobionts with broad ecological amplitude and worldwide distribution. In several taxa of pioneer lichens, low specificity as... 2011 info:eu-repo/semantics/doctoralThesis http://www.nusl.cz/ntk/nusl-299535 eng info:eu-repo/semantics/restrictedAccess
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language English
format Doctoral Thesis
sources NDLTD
description My study is focused on green algal photobionts - lichenized algae from the genera Asterochloris and Trebouxia (the last was studied in a lesser extent). The principal objectives of the thesis can be characterized as follows: 1) to investigate the chloroplast morphology in lichenized algae Asterochloris and Trebouxia; 2) to study the photobiont diversity in lichen community growing in heavy metal polluted habitats; 3) to inventorize the photobionts in selected lichen taxa (Lepraria, Stereocaulon) in order to reveal their ecological requirements. Using confocal microscopy, significant differences in the chloroplast structure of lichenized and cultured (free-living) algae were detected. Moreover, algae exhibited gradual changes in chloroplast shape and structure during successive phases of cultivation - from the relatively simple lichenized form to the complex lobate chloroplast with several ontogenetic (morphological) stages observable in mature axenic cultures. Several Asterochloris lineages and one Trebouxia species were detected in terricolous lichen community from metal-polluted habitats using phylogenetic analysis of algal ITS sequences. All these lineages represented photobionts with broad ecological amplitude and worldwide distribution. In several taxa of pioneer lichens, low specificity as...
author2 Neustupa, Jiří
author_facet Neustupa, Jiří
Peksa, Ondřej
author Peksa, Ondřej
spellingShingle Peksa, Ondřej
Studium fotobiontů lichenizovaného rodu Lepraria
author_sort Peksa, Ondřej
title Studium fotobiontů lichenizovaného rodu Lepraria
title_short Studium fotobiontů lichenizovaného rodu Lepraria
title_full Studium fotobiontů lichenizovaného rodu Lepraria
title_fullStr Studium fotobiontů lichenizovaného rodu Lepraria
title_full_unstemmed Studium fotobiontů lichenizovaného rodu Lepraria
title_sort studium fotobiontů lichenizovaného rodu lepraria
publishDate 2011
url http://www.nusl.cz/ntk/nusl-299535
work_keys_str_mv AT peksaondrej studiumfotobiontulichenizovanehorodulepraria
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