Effect of dehydration on spectral reflectance and
photosynthetic efficiency in Umbilicaria arctica and U.
hyperborea

J 2015

Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea

BARTÁK, Miloš, Kateřina TRNKOVÁ, Erik Steen HANSEN, Jana HAZDROVÁ, Kateřina SKÁCELOVÁ et. al.

Basic information

Original name

Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea

Name in Czech

Vliv dehydrace na spektrální reflektanci a fotosyntetickou účinnost Umbilicaria arctica a U. hyperborea

Authors

BARTÁK, Miloš (203 Czech Republic, guarantor, belonging to the institution), Kateřina TRNKOVÁ (203 Czech Republic, belonging to the institution), Erik Steen HANSEN (208 Denmark), Jana HAZDROVÁ (203 Czech Republic, belonging to the institution), Kateřina SKÁCELOVÁ (203 Czech Republic, belonging to the institution), Josef HÁJEK (203 Czech Republic, belonging to the institution) and Marie FORBELSKÁ (203 Czech Republic, belonging to the institution)

Edition

Biologia Plantarum, Academia, 2015, 0006-3134

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10600 1.6 Biological sciences

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

On line first

Impact factor

Impact factor: 1.665

RIV identification code

RIV/00216224:14310/15:00082594

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1007/s10535-015-0506-1

UT WoS

000353889400019

Keywords (in Czech)

spektrální indexy; NDVI; PRI; efektivní kvantový výtěžek

Keywords in English

spectral indices; NDVI; PRI; effective quantum yield

Abstract

ORIG CZ

V originále

In many polar and alpine ecosystems, lichens of genus Umbilicaria represent dominant species forming community structure. Photosynthetic and spectral properties of the lichens may change rapidly according to an actual hydration status of their thalli. In this study, we investigated responses of photochemical reflectance index (PRI), normalized difference vegetation index (NDVI), effective quantum yield of photosynthetic efficiency of photosystem (PS) II (PhiPSII), and several photosynthetic parameters derived from fast induction kinetics of chlorophyll fluorescence (OJIP) to controlled dehydration. We used U. arctica and U. hyperborea collected close to Nuuk, Greenland. In both the species, PRI showed a curvilinear increase with dehydration, i.e., a decreasing water potential (WP). The increase was apparent within WP range of 0 to minus 10 MPa. The PRI increase was less pronounced in U. arctica than in U. hyperborea. NDVI decreased with a progressive thallus dehydration in both the species, however, throughout WP range of 0 to minus 30 MPa, U. hyperborea had lower NDVI values than U. arctica. The relationship between PhiPSII and WP resulted in a typical S curve. A critical WP at which photosynthetic processes were fully inhibited was minus 30 MPa in both the species, however, species-specific differences in the S curve shape were found. Analyses of photosynthetic parameters derived from OJIPs revealed that the absorption of radiation energy and a trapping rate increased with dehydration in active reaction centres of PS II, number of which decreased with more pronounced lichen thallus dehydration. It is concluded that U. arctica and U. hyperborea possess effective physiological mechanisms to maintain an effective photosynthesis when partly dehydrated (the WP range of 0 to minus 15 MPa). In spite of similar ecological niches that these two lichens occupy in nature, their spectral and photosynthetic properties differ.

In Czech

V mnoha polárních a horských ekosystémech, lišejníky rodu Umbilicaria představují dominantní druhy tvořící strukturu společenstva. Fotosyntetické a spektrální vlastnosti lišejníků se mohou rychle měnit v závislosti na aktuálním stavu hydratační jejich stélek. V této studii jsme zkoumali reakce fotochemické indexu odrazivosti (PRI), normalizovaný vegetační index (NDVI), efektivní kvantový výtěžek fotosyntetické účinnosti fotosystému (PS), II (PhiPSII), a několik fotosyntetických parametrů odvozených z rychlých indukčních křivek chlorofylu fluorescence (OJIP) v průběhu řízené dehydratace.

Citovat

BARTÁK, Miloš, Kateřina TRNKOVÁ, Erik Steen HANSEN, Jana HAZDROVÁ, Kateřina SKÁCELOVÁ, Josef HÁJEK and Marie FORBELSKÁ. Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea. Biologia Plantarum. Academia, 2015, vol. 59, No 2, p. 357-365. ISSN 0006-3134. Available from: https://dx.doi.org/10.1007/s10535-015-0506-1.

@article{1231737,
   author = {Barták, Miloš and Trnková, Kateřina and Hansen, Erik Steen and Hazdrová, Jana and Skácelová, Kateřina and Hájek, Josef and Forbelská, Marie},
   article_number = {2},
   doi = {http://dx.doi.org/10.1007/s10535-015-0506-1},
   keywords = {spectral indices; NDVI; PRI; effective quantum yield},
   language = {eng},
   issn = {0006-3134},
   journal = {Biologia Plantarum},
   title = {Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea},
   url = {http://link.springer.com/article/10.1007/s10535-015-0506-1},
   volume = {59},
   year = {2015}
}

TY  - JOUR
ID  - 1231737
AU  - Barták, Miloš - Trnková, Kateřina - Hansen, Erik Steen - Hazdrová, Jana - Skácelová, Kateřina - Hájek, Josef - Forbelská, Marie
PY  - 2015
TI  - Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea
JF  - Biologia Plantarum
VL  - 59
IS  - 2
SP  - 357-365
EP  - 357-365
PB  - Academia
SN  - 00063134
KW  - spectral indices
KW  - NDVI
KW  - PRI
KW  - effective quantum yield
UR  - http://link.springer.com/article/10.1007/s10535-015-0506-1
L2  - http://link.springer.com/article/10.1007/s10535-015-0506-1
N2  - In many polar and alpine ecosystems, lichens of genus Umbilicaria represent dominant species forming community structure. Photosynthetic and spectral properties of the lichens may change rapidly according to an actual hydration status of their thalli. In this study, we investigated responses of photochemical reflectance index (PRI), normalized difference vegetation index (NDVI), effective quantum yield of photosynthetic efficiency of photosystem (PS) II (PhiPSII), and several photosynthetic parameters derived from fast induction kinetics of chlorophyll fluorescence (OJIP) to controlled dehydration. We used U. arctica and U. hyperborea collected close to Nuuk, Greenland. In both the species, PRI showed a curvilinear increase with dehydration, i.e., a decreasing water potential (WP). The increase was apparent within WP range of 0 to minus 10 MPa. The PRI increase was less pronounced in U. arctica than in U. hyperborea. NDVI decreased with a progressive thallus dehydration in both the species, however, throughout WP range of 0 to minus 30 MPa, U. hyperborea had lower NDVI values than U. arctica. The relationship between PhiPSII and WP resulted in a typical S curve. A critical WP at which photosynthetic processes were fully inhibited was minus 30 MPa in both the species, however, species-specific differences in the S curve shape were found. Analyses of photosynthetic parameters derived from OJIPs revealed that the absorption of radiation energy and a trapping rate increased with dehydration in active reaction centres of PS II, number of which decreased with more pronounced lichen thallus dehydration. It is concluded that U. arctica and U. hyperborea possess effective physiological mechanisms to maintain an effective photosynthesis when partly dehydrated (the WP range of 0 to minus 15 MPa). In spite of similar ecological niches that these two lichens occupy in nature, their spectral and photosynthetic properties differ.
ER  -

BARTÁK, Miloš, Kateřina TRNKOVÁ, Erik Steen HANSEN, Jana HAZDROVÁ, Kateřina SKÁCELOVÁ, Josef HÁJEK and Marie FORBELSKÁ. Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea. \textit{Biologia Plantarum}. Academia, 2015, vol.~59, No~2, p.~357-365. ISSN~0006-3134. Available from: https://dx.doi.org/10.1007/s10535-015-0506-1.

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