مورد إلكتروني
Descripción ultraestructural de Euglena pailasensis (Euglenozoa) del Volcán Rincón de la Vieja, Guanacaste, Costa Rica
| العنوان: | Descripción ultraestructural de Euglena pailasensis (Euglenozoa) del Volcán Rincón de la Vieja, Guanacaste, Costa Rica |
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| بيانات النشر: | Universidad de Costa Rica 2004 |
| تفاصيل مُضافة: | Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular Sánchez, Ethel P. Vargas, Maribel Mora, Marielos M. Ortega Rodríguez, José María Serrano Delgado, Aurelio Freer, Enrique Sittenfeld, Ana |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The euglenoids are unicellular eukaryotic flagellates living in a diversity of soils and aquatic environments and ecosystems. This study describes the ultrastructure of an euglenoid isolated from the surface of a boiling mud pool with temperatures ranging from 38 to 98°C and pH 2 - 4. The hot mud pool is located in Area de Pailas de Barro, Las Pailas, Rincón de la Vieja Volcano, Guanacaste, Costa Rica. The morphological characterization of the Euglena pailasensis was performed by SEM and TEM. It was determined that, although the euglenoid was obtained from an extreme volcanic environment, the general morphology corresponds to that of a typical member of Euglena of 30-45 μm long and 8-10 μm wide, with membrane, pellicle, chloroplasts, mitochondria, nucleus, pigments and other cytoplasmic organelles. E. pailasensis is delimited by a membrane and by 40 to 90 pellicle strips. It was observed up to 5 elongated chloroplasts per cell. The chloroplast contains several osmiophilic globules and a pyrenoid penetrated by few thylakoid pairs. The nutritious material is reserved in numerous small paramylon grains located at the center of the cell, mitocondria are characterized by the presence of crests in radial disposition toward the interior of the lumen. It was also observed around the external surface “pili” like filaments originating from the pellicle strips. There is no evidence for the presence of flagella in the ampulla (reservoir/canal area), a fact confirmed by negative staining, and a difference regarding other species of Euglena. The observed ultrastructural characteristics are not sufficient to explain the adaptation of this species to acid and hot environments |
| مصطلحات الفهرس: | protozoa, euglenozoa, euglenoid, euglena, ultrastructure, termoresistent, acid tolerant, info:eu-repo/semantics/article |
| URL: | Revista de Biología Tropical, 52 (1), 31-40. |
| الإتاحة: | Open access content. Open access content http://creativecommons.org/licenses/by-nc-nd/4.0 info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional |
| ملاحظة: | Spanish English |
| أرقام أخرى: | SUE oai:idus.us.es:11441/40392 Sánchez, E.P., Vargas, M., Mora, M.M., Ortega Rodríguez, J.M., Serrano Delgado, A., Freer, E. y Sittenfeld, A. (2004). Descripción ultraestructural de Euglena pailasensis (Euglenozoa) del Volcán Rincón de la Vieja, Guanacaste, Costa Rica. Revista de Biología Tropical, 52 (1), 31-40. 0034-7744 0034-7744 10.15517/rbt.v52i1.14699 https://idus.us.es/xmlui/handle/11441/40392 1257939526 |
| المصدر المساهم: | UNIV DE SEVILLA From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1257939526 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |