An Exception to the Rule? Could Photobiont Identity Be a Better Predictor of Lichen Phenotype than Mycobiont Identity?

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Cladonia coccifera group: The study of chemotaxonomy

Katedra botanikyDepartment of BotanyFaculty of SciencePřírodovědecká fakult

Diverzita a fylogeneze symbiotických partnerů červenoplodých dutohlávek a jim příbuzných druhů.

Ačkoliv lišejníky představují jeden z nejklasičtějších příkladů symbiotických asociací, tak se pohled na jejich symbiózu během posledních sto padesáti let výrazně změnil. V současnosti jsou lišejníky obvykle vnímány jako mikroekosystémy skládající se z několika symbiotických partnerů, kteří různým způsobům příspívají k fungování celého systému a kteří se vzájemně liší silou vazby k dalším partnerům. Úroveň poznání specificity, diverzity a faktorů, které tuto diverzitu ovlivňují, se u jednotlivých partnerů (mykobiont, fotobiont a bakterie) výrazně liší. Hlavním cílem této práce bylo odhalit diverzitu organismů, které se na lišejníkové symbióze podílejí a lépe porozumět biologickým silám, které tuto diverzitu ovlivňují. Pracovali jsme s červenoplodými zeorin obsahujícími dutohlávkami, což je poměrně běžná skupina lišejníků. Konkrétně jsme se zaměřili na studium organismů (mykobiontů, fotobiontů a bakterií), které se v těchto dutohlávkách vyskytují. V průběhu studie vyšlo najevo, že dalším tématem, které si zaslouží naši pozornost, je problematika vymezení druhů (species delimation). Z výsledků vyplynulo, že současné vymezení většiny druhů mykobiontů není podpořeno molekulárními daty. Genetická diverzita mykobiontů byla poměrně vysoká a bylo zjištěno několik linií, které nebylo možné fenotypově...Lichens are a classic example of mutualistic symbiotic associations, yet the views on lichen symbiosis have changed considerably during the last fifty years. Nowadays, lichens are generally understood to be microecosystems consisting of several symbiotic partners which contribute in different ways to the prosperity of the whole system and which differ by the strength of their bond to other symbiotic partners. The level of knowledge of the individual partners (mycobionts vs. photobionts vs. bacteria) varies greatly in terms of their specificity, diversity and in the forces that shape this diversity. The main aim of this work was to reveal the diversity of organisms participating in lichen symbiosis and to better understand the biological forces which shape this diversity. We worked with a relatively common lichen group, zeorin-containing red-fruited Cladonia species, and specifically, we focused on the mycobionts, photobionts and bacteria that participate in this association. During the course of the study, it became apparent that species delimitation, which is a fundamental requirement for accurate diversity estimates, is another topic that requires further research. Our analyses revealed that species circumscription of most of recently recognized Cladonia mycobionts cannot by supported by...Katedra botanikyDepartment of BotanyPřírodovědecká fakultaFaculty of Scienc

Diversity and phylogeny of symbiotic partners in zeorin-containing red-fruited Cladonia species.

Lichens are a classic example of mutualistic symbiotic associations, yet the views on lichen symbiosis have changed considerably during the last fifty years. Nowadays, lichens are generally understood to be microecosystems consisting of several symbiotic partners which contribute in different ways to the prosperity of the whole system and which differ by the strength of their bond to other symbiotic partners. The level of knowledge of the individual partners (mycobionts vs. photobionts vs. bacteria) varies greatly in terms of their specificity, diversity and in the forces that shape this diversity. The main aim of this work was to reveal the diversity of organisms participating in lichen symbiosis and to better understand the biological forces which shape this diversity. We worked with a relatively common lichen group, zeorin-containing red-fruited Cladonia species, and specifically, we focused on the mycobionts, photobionts and bacteria that participate in this association. During the course of the study, it became apparent that species delimitation, which is a fundamental requirement for accurate diversity estimates, is another topic that requires further research. Our analyses revealed that species circumscription of most of recently recognized Cladonia mycobionts cannot by supported by..

Cladonia coccifera group: The study of chemotaxonomy

Katedra botanikyDepartment of BotanyFaculty of SciencePřírodovědecká fakult

Revision of Cladonia coccifera group in Middle Europe with emhasis to Czech Republic

Department of BotanyKatedra botanikyFaculty of SciencePřírodovědecká fakult

Diversity and phylogeny of symbiotic partners in zeorin-containing red-fruited Cladonia species.

Lichens are a classic example of mutualistic symbiotic associations, yet the views on lichen symbiosis have changed considerably during the last fifty years. Nowadays, lichens are generally understood to be microecosystems consisting of several symbiotic partners which contribute in different ways to the prosperity of the whole system and which differ by the strength of their bond to other symbiotic partners. The level of knowledge of the individual partners (mycobionts vs. photobionts vs. bacteria) varies greatly in terms of their specificity, diversity and in the forces that shape this diversity. The main aim of this work was to reveal the diversity of organisms participating in lichen symbiosis and to better understand the biological forces which shape this diversity. We worked with a relatively common lichen group, zeorin-containing red-fruited Cladonia species, and specifically, we focused on the mycobionts, photobionts and bacteria that participate in this association. During the course of the study, it became apparent that species delimitation, which is a fundamental requirement for accurate diversity estimates, is another topic that requires further research. Our analyses revealed that species circumscription of most of recently recognized Cladonia mycobionts cannot by supported by..