Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00120385" target="_blank" >RIV/00216224:14310/18:00120385 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs11738-018-2751-3" target="_blank" >https://link.springer.com/article/10.1007%2Fs11738-018-2751-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11738-018-2751-3" target="_blank" >10.1007/s11738-018-2751-3</a>

Result language

angličtina

Original language name

Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont

Original language description

In this study, we investigated responses of the Photochemical Reflectance Index (PRI), and Normalized Difference Vegetation Index (NDVI) to gradual dehydration of several Antarctic lichen species (chlorolichens: Xanthoria elegans, Rhizoplaca melanophthalma, Physconia muscigena, cyanolichen: Leptogium puberulum), and a Nostoc commune colony from fully wet to a dry state. The gradual loss of physiological activity during dehydration was evaluated by chlorophyll fluorescence parameters. The experimental lichen species differed in thallus color, and intrathalline photobiont. In the species that did not exhibit color change with desiccation (X. elegans), NDVI and PRI were more or less constant throughout a wide range of thallus hydration status showing a linear relation to relative water content (RWC). In contrast, the species with apparent species-specific color change during dehydration exhibited a curvilinear relation of NDVI and PRI to RWC. PRI decreased (R. melanophthalma, L. puberulum), increased (N. commune) or showed a polyphasic response (P. muscigena) with desiccation. Except for X. elegans, a curvilinear relation was found between the NDVI response to RWC in all species indicating the potential of combined ground research and remote sensing spectral data analyses in polar regions dominated by lichen flora. The chlorophyll fluorescence data recorded during dehydration (RWC decreased from 100 to 0%) revealed a polyphasic species-specific response of variable fluorescence measured at steady state Fs, effective quantum yield of photosystem II (YIeldPSII), and non-photochemical quenching (qN). Full hydration caused an inhibition of YieldPSII in N. commune while other species remained unaffected. The dehydration-dependent fall in YieldPSII was species-specific, starting at an RWC range of 22–32%. Critical RWC for YieldPSII was around 5–10%. Desiccation led to a species-specific polyphasic decrease in Fs and an increase in qN indicating the involvement of protective mechanisms in the chloroplastic apparatus of lichen photobionts and N. commune cells. In this study, the spectral reflectance and chlorophyll fluorescence data are discussed in relation to the potential of ecophysiological processes in Antarctic lichens, their resistance to desiccation and survival in Antarctic vegetation oases.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10611 - Plant sciences, botany

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Acta Physiologiae Plantarum

ISSN

0137-5881

e-ISSN

1861-1664

Volume of the periodical

40

Issue of the periodical within the volume

10

Country of publishing house

PL - POLAND

Number of pages

19

Pages from-to

1-19

UT code for WoS article

000444010700001

EID of the result in the Scopus database

2-s2.0-85052995131