Characterization of a photosynthetic Euglena strain isolated from an acidic hot mud pool of a volcanic area of Costa Rica11This paper and the new species described herein are dedicated to His Royal Highness the Prince of Asturias, Don Felipe de Borbo´n y Grecia, for his constant interest in environmental affairs and outstanding contribution to the scientific research cooperation between Spain and Latinoamerican nations.

Autor: Sittenfeld, Ana, Mora, Marielos, Ortega, José Marıa, Albertazzi, Federico, Cordero, Andrés, Roncel, Mercedes, Sánchez, Ethel, Vargas, Maribel, Fernández, Mario, Weckesser, Jürgen, Serrano, Aurelio
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Zdroj: FEMS Microbiology Ecology; Oct2002, Vol. 42 Issue 1, p151, 11p
Abstrakt: Conspicuous green patches on the surface of an acidic hot mud pool located near the Rinco´n de la Vieja volcano (northwestern Costa Rica) consisted of apparently unialgal populations of a chloroplast-bearing euglenoid. Morphological and physiological studies showed that it is a non-flagellated photosynthetic Euglena strain able to grow in defined mineral media at temperatures up to 40°C and exhibiting higher thermotolerance than Euglena gracilis SAG 5/15 in photosynthetic activity analyses. Molecular phylogeny studies using 18S rDNA and GapC genes indicated that this strain is closely related to Euglena mutabilis, another acid-tolerant photosynthetic euglenoid, forming a clade deeply rooted in the Euglenales lineage. To our knowledge this is the most thermotolerant euglenoid described so far and the first Euglenozoan strain reported to inhabit acidic hot aquatic habitats. [Copyright &y& Elsevier]
Databáze: Complementary Index
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