Počet záznamů: 1
Growth and morphological variation as a response to changing environmental factors in two Arctic species of Raphidonema (Trebouxiophyceae) from snow and soil
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SYSNO ASEP 0027729 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Growth and morphological variation as a response to changing environmental factors in two Arctic species of Raphidonema (Trebouxiophyceae) from snow and soil Překlad názvu Růst a morfologické změny v závislosti na změnách prostředí u dvou Arctických druhů rodu Raphidonema (Trebouxiophyceae) ze sněhu a půdy Tvůrce(i) Stibal, Marek (BU-J)
Elster, Josef (BU-J) RID, ORCIDZdroj.dok. Polar Biology. - : Springer - ISSN 0722-4060
Roč. 28, - (2005), s. 558-567Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova Arctic ; snow algae ; Raphidonema Vědní obor RIV EF - Botanika CEP ME 576 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z6005908 - BU-J Anotace Two Arctic species of Raphidonema, a weakly filamentous green alga, were compared on the basis of their growth and morphology response to varied environmental factors. The strain of R. nivale was isolated from snow and R. sempervirens from soil collected in Svalbard. Morphological variability was evaluated in both strains, with emphasis laid on pleiomorphism of R. nivale. Growth characteristics in varied temperature and light were compared. Field observations were performed in the summer season 2003 at Werenskiöld glacier, southwest Spitsbergen. In both strains, temperature and light affects shape and size of cells, and in R. nivale also the number of cells in filament, probably by modifying growth and division rates. The strain of R. nivale grew best at 12°C and 200 μmol.m-2.s-1, R. sempervirens at 18°C and 50 μmol.m-2.s-1. In snow, R. nivale only appeared after strong wind had brought soil on the snow surface, and its concentrations decreased very rapidly. Cells of R. nivale in snow showed great signs of damage. On the basis of obtained results, it is suggested here that Raphidonema nivale is a soil species well adapted to soil environment, and only occasionally brought on snow. Pracoviště Botanický ústav Kontakt Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Rok sběru 2006
Počet záznamů: 1