Levels of polyols and non-structural saccharides in natural and
experimentally affected lichens: Case study in Xanthoparmelia
somloensis

a 2009

Levels of polyols and non-structural saccharides in natural and experimentally affected lichens: Case study in Xanthoparmelia somloensis

SMEJKAL, Lubomír, Josef HÁJEK a Miloš BARTÁK

Základní údaje

Originální název

Levels of polyols and non-structural saccharides in natural and experimentally affected lichens: Case study in Xanthoparmelia somloensis

Název česky

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Autoři

SMEJKAL, Lubomír (203 Česká republika), Josef HÁJEK (203 Česká republika, garant) a Miloš BARTÁK (203 Česká republika)

Vydání

7th International Conference of Ph.D. Students on Experimental Plant Biology, MZLU, Brno, Czech Republic, 30th June – 1st July 2009, 2009

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10600 1.6 Biological sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Kód RIV

RIV/00216224:14310/09:00028545

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-7375-310-8

Klíčová slova anglicky

ribitol; mannitol; non structural saccharides; low and freezing temperatures; lichen; polyols

Štítky

lichen, low and freezing temperatures, mannitol, non structural saccharides, polyols, ribitol

Změněno: 3. 7. 2009 12:37, doc. Mgr. Josef Hájek, Ph.D.

Anotace

ORIG CZ

V originále

In algae possessing lichens, polyols serve as energy-storing compounds. They are also osmotically-active compounds that increase lichen resistance to low and freezing temperatures. Natural levels of polyols in lichens are species-specific. They vary within 1.4-8.8 mg.g-1 DW (ribitol), 0.4-29.0 mg.g-1 (mannitol). We investigated natural and experimentally-affected contents of polyols and non-structural saccharides (NSS). Ribitol, mannitol, arabitol and NSS were HPLC-evaluated before and after the experimental treatments: in-vitro exposition of thalli to additional ribitol (32, 50 mM for 168 h at +5, 0, -5 deg C). Initial values were 2.6, 4.1 mg.g-1 DW (ribitol, mannitol). Addition of ribitol led to increased levels of mannitol (at all temperatures), while ribitol, arabitol and fructose showed either no or insignificant change. In control and ribitol-treated lichens, lowest mannitol content was found at -5 deg C. The results were attibuted to altered utilization of polyols at freezing temperature. Underlaying mechanisms of low temperature-dependent changes in polyol exploitation are important for the lichen life strategy at low and freezing temperatures. The abstract was supported by the KJB601630808 project funded by the Grant Agency of the Czech Academy of Science (GAAV), Czech Republic.

Česky

Návaznosti

KJB601630808, projekt VaV

Název: Účinky chladu a mrazu na fotosyntézu lišejníkových symbiotických řas ovlivněných ribitolem.

Investor: Akademie věd ČR, Účinky chladu a mrazu na fotosyntézu lišejníkových symbiotických řas ovlivněných ribitolem

Citovat

SMEJKAL, Lubomír, Josef HÁJEK a Miloš BARTÁK. Levels of polyols and non-structural saccharides in natural and experimentally affected lichens: Case study in Xanthoparmelia somloensis. In 7th International Conference of Ph.D. Students on Experimental Plant Biology, MZLU, Brno, Czech Republic, 30th June – 1st July 2009. 2009. ISBN 978-80-7375-310-8.

@proceedings{839742,
   author = {Smejkal, Lubomír and Hájek, Josef and Barták, Miloš},
   booktitle = {7th International Conference of Ph.D. Students on Experimental Plant Biology, MZLU, Brno, Czech Republic, 30th June – 1st July 2009},
   keywords = {ribitol; mannitol; non structural saccharides; low and freezing temperatures; lichen; polyols},
   language = {eng},
   isbn = {978-80-7375-310-8},
   title = {Levels of polyols and non-structural saccharides in natural and experimentally affected lichens: Case study in Xanthoparmelia somloensis},
   url = {http://phd.czweb.org/phd09/},
   year = {2009}
}

TY  - CONF
ID  - 839742
AU  - Smejkal, Lubomír - Hájek, Josef - Barták, Miloš
PY  - 2009
TI  - Levels of polyols and non-structural saccharides in natural and experimentally affected lichens: Case study in Xanthoparmelia somloensis
SN  - 9788073753108
KW  - ribitol
KW  - mannitol
KW  - non structural saccharides
KW  - low and freezing temperatures
KW  - lichen
KW  - polyols
UR  - http://phd.czweb.org/phd09/
N2  - In algae possessing lichens, polyols serve as energy-storing compounds. They are also osmotically-active compounds that increase lichen resistance to low and freezing temperatures. Natural levels of polyols in lichens are species-specific. They vary within 1.4-8.8 mg.g-1 DW (ribitol), 0.4-29.0 mg.g-1 (mannitol). We investigated natural and experimentally-affected contents of polyols and non-structural saccharides (NSS). Ribitol, mannitol, arabitol and NSS were HPLC-evaluated before and after the experimental treatments: in-vitro exposition of thalli to additional ribitol (32, 50 mM for 168 h at +5, 0, -5 deg C). Initial values were 2.6, 4.1 mg.g-1 DW (ribitol, mannitol). Addition of ribitol led to increased levels of mannitol (at all temperatures), while ribitol, arabitol and fructose showed either no or insignificant change. In control and ribitol-treated lichens, lowest mannitol content was found at -5 deg C. The results were attibuted to altered utilization of polyols at freezing temperature. Underlaying mechanisms of low temperature-dependent changes in polyol exploitation are important for the lichen life strategy at low and freezing temperatures. The abstract was supported by the KJB601630808 project funded by the Grant Agency of the Czech Academy of Science (GAAV), Czech Republic.
ER  -

SMEJKAL, Lubomír, Josef HÁJEK a Miloš BARTÁK. Levels of polyols and non-structural saccharides in natural and experimentally affected lichens: Case study in Xanthoparmelia somloensis. In \textit{7th International Conference of Ph.D. Students on Experimental Plant Biology, MZLU, Brno, Czech Republic, 30th June – 1st July 2009}. 2009. ISBN~978-80-7375-310-8.

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