Interspecific differences in photosynthetic efficiency and
spectral reflectance in two Umbilicaria species from Svalbard
during controlled desiccation

J 2012

Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation

JUPA, Radek, Josef HÁJEK, Jana HAZDROVÁ a Miloš BARTÁK

Základní údaje

Originální název

Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation

Název česky

Mezidruhové rozdíly ve fotosyntetické účinnosti a spektrální reflektanci mezi dvěma druhy Umbilicaria ze Svalbard-u v průběhu řízeného vysychání.

Autoři

JUPA, Radek (203 Česká republika), Josef HÁJEK (203 Česká republika), Jana HAZDROVÁ (203 Česká republika) a Miloš BARTÁK (203 Česká republika, garant, domácí)

Vydání

Czech Polar Reports, Brno, Masaryk University, 2012, 1805-0689

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

full_text_paper

Kód RIV

RIV/00216224:14310/12:00061545

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova česky

kvantový výtěžek; vodní potenciál; fluorescence chlorofylu; PRI; lišejník,;vodní stres

Klíčová slova anglicky

Quantum yield; water potential; chlorophyll fluorescence; Photochemical Reflectance Index; lichen; water stress

Štítky

AKR, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 28. 10. 2012 16:12, prof. Ing. Miloš Barták, CSc.

Anotace

ORIG CZ

V originále

This study aimed to evaluate the effective photosynthetic quantum yield ( Phi PSII) and the Photochemical Reflectance Index (PRI) for assessment of photosynthetic performance of two Umbilicaria lichens during gradual desiccation of their thalli. U. cylindrica and U. decussata exhibited curvilinear relationship (S-shape curve) of decreasing Phi PSII values with decreasing water potential (WP) of thalli. During initial phase of desiccation (WP from 0 to -10 MPa), no decrease of Phi PSII was apparent, further desiccation (WP from -10 to -20 MPa) led to fast Phi PSII decrease from 0.6 to 0.1 indicating strong inhibition of photosynthetic processes. Critical WP at which photosythetic processes are fully inhibited was found bellow -25 MPa in both lichen species. Photochemical Reflectance Index (PRI) exhibited curvilinear increase with thalli desiccation (decreasing WP). At full thallus hydration, the PRI reached the value of -0.18 in both species. Under strong dehydration (WP from -20 to -30 MPa), however, U. cylindrica showed somewhat lower value (-0.04) than U.decussata (-0.02 MPa). PRI to WP relationship is discussed and compared to existing evidence from higher plants and poikilohydric organisms.

Česky

Tato publikace je zaměřena na souběžné sledování indexu PRI a efektivního kvantového výtěžku fyotoyntézy během vysychání stélek dvou druhů lišejníků rodu Umbilicaria ze souostroví Špicberky (Svalbard). Byl zjištěno, že PRI s postupujícím vysycháním roste, zatímco u listů vyšších rostlin klesá.

Návaznosti

LM2010009, projekt VaV

Název: Projekt CzechPolar - České polární stanice: Stavba a operační náklady

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Czech Polar - České polární stanice: Stavba a operační náklady

Přiložené soubory

Jupa-web.pdf

Vyhledat podobné dokumenty

Citovat

JUPA, Radek, Josef HÁJEK, Jana HAZDROVÁ a Miloš BARTÁK. Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation. Czech Polar Reports. Brno: Masaryk University, 2012, roč. 2, č. 1, s. 31 - 41. ISSN 1805-0689.

@article{1070676,
   author = {Jupa, Radek and Hájek, Josef and Hazdrová, Jana and Barták, Miloš},
   article_location = {Brno},
   article_number = {1},
   keywords = {Quantum yield; water potential; chlorophyll fluorescence; Photochemical Reflectance Index; lichen; water stress},
   language = {eng},
   issn = {1805-0689},
   journal = {Czech Polar Reports},
   title = {Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation},
   url = {http://www.sci.muni.cz/CPR/3cislo/Jupa-web.pdf},
   volume = {2},
   year = {2012}
}

TY  - JOUR
ID  - 1070676
AU  - Jupa, Radek - Hájek, Josef - Hazdrová, Jana - Barták, Miloš
PY  - 2012
TI  - Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation
JF  - Czech Polar Reports
VL  - 2
IS  - 1
SP  - 31 - 41
EP  - 31 - 41
PB  - Masaryk University
SN  - 18050689
KW  - Quantum yield
KW  - water potential
KW  - chlorophyll fluorescence
KW  - Photochemical Reflectance Index
KW  - lichen
KW  - water stress
UR  - http://www.sci.muni.cz/CPR/3cislo/Jupa-web.pdf
L2  - http://www.sci.muni.cz/CPR/3cislo/Jupa-web.pdf
N2  - This study aimed to evaluate the effective photosynthetic quantum yield ( Phi PSII) and the Photochemical Reflectance Index (PRI) for assessment of photosynthetic performance of two Umbilicaria lichens during gradual desiccation of their thalli. U. cylindrica and U. decussata exhibited curvilinear relationship (S-shape curve) of decreasing Phi PSII values with decreasing water potential (WP) of thalli. During initial phase of desiccation (WP from 0 to -10 MPa), no decrease of Phi PSII was apparent, further desiccation (WP from -10 to -20 MPa) led to fast Phi PSII decrease from 0.6 to 0.1 indicating strong inhibition of photosynthetic processes. Critical WP at which photosythetic processes are fully inhibited was found bellow -25 MPa in both lichen species. Photochemical Reflectance Index (PRI) exhibited curvilinear increase with thalli desiccation (decreasing WP). At full thallus hydration, the PRI reached the value of -0.18 in both species. Under strong dehydration (WP from -20 to -30 MPa), however, U. cylindrica showed somewhat lower value (-0.04) than U.decussata (-0.02 MPa). PRI to WP relationship is discussed and compared to existing evidence from higher plants and poikilohydric organisms.
ER  -

JUPA, Radek, Josef HÁJEK, Jana HAZDROVÁ a Miloš BARTÁK. Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation. \textit{Czech Polar Reports}. Brno: Masaryk University, 2012, roč.~2, č.~1, s.~31 - 41. ISSN~1805-0689.

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