Visualized photosynthetic characteristics of the lichen <i>Xanthoria elegans</i> related to daily courses of light, temperature and hydration: a field study from Galindez Island, maritime Antarctica.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F05%3A00013939" target="_blank" >RIV/00216224:14310/05:00013939 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Visualized photosynthetic characteristics of the lichen <i>Xanthoria elegans</i> related to daily courses of light, temperature and hydration: a field study from Galindez Island, maritime Antarctica.

Original language description

Diurnal courses of photosystem II (PS II) activity of Xanthoria elegans were continuously monitored using a novel technique of chlorophyll fluorescence imaging in the field (maritime Antarctica) over a period of 7 days. The lichen specimens grew on stonesurfaces in a North-facing coastal area of Galindez Island (Argentine Islands). A portable fluorometer FluorCam equipped with a CCD camera and image analysis software was placed over a thallus so that false color images of FV/FM and quantum yield of photochemical processes in PS II (śII) distribution over the thallus could be taken in the course of a day. Simultaneously, microclimatic parameters of the habitat were recorded: air and thallus temperature, relative air humidity, PAR (photosynthetically active radiation) and global radiation. Photosynthetic processes in X. elegans were activated by rainfall or water from melting snow. After thallus hydration, FV/FM and śII gradually decreased from their maximal values due to evaporation an

Czech name

Vizualizované fotosyntetické charakteristiky liejníku Xanthoria elegans ve vztahu k denním chodm záení, teploty a vlhkosti: terénní studie z ostrova Galindez, pímoská Antarktida.

Czech description

Po dobu 7 dnu byly v terennich podminkach detailn monitorovany denni; chody aktivity fotosystemu II (PS II) liejniku Xanthoria elegans za pouziti noveho metodickeho pristupu chlorophyll fluorescence imaging, a to v oblasti ostrova Galindez,primorska Antarktida. Dynamika aktivity PS II byla sledovana v zavislosti na soubezne zaznamenavanych chodech globalni a fotosynteticky aktivni radiace, teploty stelky a vlhkosti vzduchu. Dehydrace byla shledana klicovym faktorem limitace fotosynteticke aktivity Xanthoria elegans.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EF - Botany

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2005

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

The Lichenologist

ISSN

0024-2829

e-ISSN

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Volume of the periodical

37

Issue of the periodical within the volume

5

Country of publishing house

AQ - ANTARCTICA

Number of pages

11

Pages from-to

433-443

UT code for WoS article

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EID of the result in the Scopus database

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