Inhibition of photosynthetic processes in foliose lichens
induced by temperature and osmotic stress.

J 2006

Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress.

HÁJEK, Josef, Miloš BARTÁK a Jaroslava DUBOVÁ

Základní údaje

Originální název

Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress.

Název česky

Inhibice fotosyntetických proces u foliózních liejník indukovaná teplotou a osmotickým stresem.

Autoři

HÁJEK, Josef (203 Česká republika, garant), Miloš BARTÁK (203 Česká republika) a Jaroslava DUBOVÁ (203 Česká republika)

Vydání

Biologia Plantarum, Dordrecht, KLUWER ACADEMIC PUBLISHERS, 2006, 0006-3134

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

Impakt faktor

Impact factor: 1.198

Kód RIV

RIV/00216224:14310/06:00015688

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000238531000022

Klíčová slova anglicky

photosynthesis; water potential; dehydration; Lasallia pustulata; Umbilicaria hirsuta; sucrose; chlorophyll fluorescence; thallus anatomy

Štítky

chlorophyll fluorescence, dehydration, Lasallia pustulata, photosynthesis, sucrose, thallus anatomy, Umbilicaria hirsuta, water potential

Změněno: 9. 6. 2006 10:08, doc. Mgr. Josef Hájek, Ph.D.

Anotace

ORIG CZ

V originále

Negative effects of osmotically-induced dehydration of two foliose lichen species, Lasallia pustulata and Umbilicaria hirsuta, was studied at physiological (22 deg C), low (5 deg C) and freezing temperature (-10 deg C), using chlorophyll (Chl) fluorescence. In both species, exposition to increasing sucrose concentrations led to a pronounced decrease in potential (FV/FM), and actual (Fi2) quantum yields of photochemical processes in photosystem 2. Lasallia pustulata was more sensitive to osmotic stress, because comparable osmotic dehydration inhibited FV/FM, Fi2 more than in Umbilicaria hirsuta. In our study, critical concentration of sucrose that fully inhibited photochemical processes of photosynthesis was 2.5 M, which represented water potential (ŁZ) of ĄV18.8 MPa. Decrease in background Chl fluorecsence (F0) and increase in non-photochemical quenching (qN) revealed two phases of osmotic stress in lichens: phase I with no change (ŁZ 0 to -6.6 MPa) and phase II (ŁZ -11.3 to -18.8 MPa) typical by substantial change in Chl fluorescence parameters. Effects of thallus anatomy on species-specific response to osmotic dehydration is discussed and attributed to results obtained by optical microscopy and Chl fluorescence imaging technique.

Česky

Prace popisuje vliv nizke teploty stelky a osmotickeho stresu na primarni fotochemicke procesy fotosyntezy lisejniku.

Návaznosti

GP206/03/P140, projekt VaV

Název: Limitace fotochemických a biochemických procesů fotosyntézy lišejníků za nízkých teplot

Investor: Grantová agentura ČR, Limitace fotochemických a biochemických procesů fotosyntézy lišejníků za nízkých teplot

Citovat

HÁJEK, Josef, Miloš BARTÁK a Jaroslava DUBOVÁ. Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress. Biologia Plantarum. Dordrecht: KLUWER ACADEMIC PUBLISHERS, 2006, roč. 50, č. 4, s. 624-634, 10 s. ISSN 0006-3134.

@article{635688,
   author = {Hájek, Josef and Barták, Miloš and Dubová, Jaroslava},
   article_location = {Dordrecht},
   article_number = {4},
   keywords = {photosynthesis; water potential; dehydration; Lasallia pustulata; Umbilicaria hirsuta; sucrose; chlorophyll fluorescence; thallus anatomy},
   language = {eng},
   issn = {0006-3134},
   journal = {Biologia Plantarum},
   note = {accepted 17 October 2005},
   title = {Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress.},
   volume = {50},
   year = {2006}
}

TY  - JOUR
ID  - 635688
AU  - Hájek, Josef - Barták, Miloš - Dubová, Jaroslava
PY  - 2006
TI  - Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress.
JF  - Biologia Plantarum
VL  - 50
IS  - 4
SP  - 624-634
EP  - 624-634
PB  - KLUWER ACADEMIC PUBLISHERS
SN  - 00063134
N1  - accepted 17 October 2005
KW  - photosynthesis
KW  - water potential
KW  - dehydration
KW  - Lasallia pustulata
KW  - Umbilicaria hirsuta
KW  - sucrose
KW  - chlorophyll fluorescence
KW  - thallus anatomy
N2  - Negative effects of osmotically-induced dehydration of two foliose lichen species, Lasallia pustulata and Umbilicaria hirsuta, was studied at physiological (22 deg C), low (5 deg C) and freezing temperature (-10 deg C), using chlorophyll (Chl) fluorescence. In both species, exposition to increasing sucrose concentrations led to a pronounced decrease in potential (FV/FM), and actual (Fi2) quantum yields of photochemical processes in photosystem 2. Lasallia pustulata was more sensitive to osmotic stress, because comparable osmotic dehydration inhibited FV/FM, Fi2 more than in Umbilicaria hirsuta. In our study, critical concentration of sucrose that fully inhibited photochemical processes of photosynthesis was 2.5 M, which represented water potential (ŁZ) of ĄV18.8 MPa. Decrease in background Chl fluorecsence (F0) and increase in non-photochemical quenching (qN) revealed two phases of osmotic stress in lichens: phase I with no change (ŁZ 0 to -6.6 MPa) and phase II (ŁZ -11.3 to -18.8 MPa) typical by substantial change in Chl fluorescence parameters. Effects of thallus anatomy on species-specific response to osmotic dehydration is discussed and attributed to results obtained by optical microscopy and Chl fluorescence imaging technique.
ER  -

HÁJEK, Josef, Miloš BARTÁK a Jaroslava DUBOVÁ. Inhibition of photosynthetic processes in foliose lichens induced by temperature and osmotic stress. \textit{Biologia Plantarum}. Dordrecht: KLUWER ACADEMIC PUBLISHERS, 2006, roč.~50, č.~4, s.~624-634, 10 s. ISSN~0006-3134.

Podrobný výpis o publikaci