Studies on cultures of Ostreopsis cf. ovata: life cycle observations
14th International Conference on Harmful Algae, 1-5 November 2010, Creta, Greece
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Hellenic Centre for Marine Research
2010-11
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| Online Access: | http://hdl.handle.net/10261/80490 |
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dig-icm-es-10261-804902019-03-26T11:29:35Z Studies on cultures of Ostreopsis cf. ovata: life cycle observations Bravo, Isabel Vila, Magda Magadán, Susana Rial, Pilar Rodríguez, Francisco Fraga, Santiago Franco, José M. Sala, M. Montserrat 14th International Conference on Harmful Algae, 1-5 November 2010, Creta, Greece Blooms of the epiphytic palytoxin-producer dinoflagellates Ostreopsis spp. have been reported over the last few years to become established in some Mediterranean coastal areas. One of these sites is Llavaneras beach (Catalonia, NE of Spain), where during summer, the blooms form a conspicuous, thick, brownish mucilage layer covering benthic macroalgae. Asexual and sexual reproduction were studied in cultures of Ostreopsis cf. ovata isolated from several locations in the Mediterranean Sea. Asexual division took place in the motile stage by sharing of the theca (desmoschisis). By means of that process, culture gradually became rich of small clumps of cells joined by threads of mucus. Two types of cells were observed in culture during late exponential phase: 1) dark medium/large size cells (40-70 μm) and 2) light small cells (30-40 μm). These cells differed in cellular content and physiological behaviour. Diel pattern of the cellular DNA content showed that maximum cell division occurred 3 hours after the beginning of dark period. In middle stationary phase, fusing gamete pairs were observed even in clones (homothallism). However, complete gamete fusion was never observed and planozygotes were unproven. Most of the gamete pairs isolated divided before the fusion was completed. Two types of cysts were detected in culture: 1) shortdormancy pellicle cysts formed by ecdysis, and 2) putative resting cysts which, so far, showed no signal of germination Peer Reviewed 2013-08-02T12:01:41Z 2013-08-02T12:01:41Z 2010-11 2013-08-02T12:01:41Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 14th International Conference on Harmful Algae. Abstract book: 29 (2010) http://hdl.handle.net/10261/80490 en http://www.issha.org/Welcome-to-ISSHA/Conferences/ICHA-Conferences/Past-conferences none Hellenic Centre for Marine Research |
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ICM ES |
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España |
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ES |
| component |
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dig-icm-es |
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biblioteca |
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Europa del Sur |
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Biblioteca del ICM España |
| language |
English |
| description |
14th International Conference on Harmful Algae, 1-5 November 2010, Creta, Greece |
| format |
comunicación de congreso |
| author |
Bravo, Isabel Vila, Magda Magadán, Susana Rial, Pilar Rodríguez, Francisco Fraga, Santiago Franco, José M. Sala, M. Montserrat |
| spellingShingle |
Bravo, Isabel Vila, Magda Magadán, Susana Rial, Pilar Rodríguez, Francisco Fraga, Santiago Franco, José M. Sala, M. Montserrat Studies on cultures of Ostreopsis cf. ovata: life cycle observations |
| author_facet |
Bravo, Isabel Vila, Magda Magadán, Susana Rial, Pilar Rodríguez, Francisco Fraga, Santiago Franco, José M. Sala, M. Montserrat |
| author_sort |
Bravo, Isabel |
| title |
Studies on cultures of Ostreopsis cf. ovata: life cycle observations |
| title_short |
Studies on cultures of Ostreopsis cf. ovata: life cycle observations |
| title_full |
Studies on cultures of Ostreopsis cf. ovata: life cycle observations |
| title_fullStr |
Studies on cultures of Ostreopsis cf. ovata: life cycle observations |
| title_full_unstemmed |
Studies on cultures of Ostreopsis cf. ovata: life cycle observations |
| title_sort |
studies on cultures of ostreopsis cf. ovata: life cycle observations |
| publisher |
Hellenic Centre for Marine Research |
| publishDate |
2010-11 |
| url |
http://hdl.handle.net/10261/80490 |
| work_keys_str_mv |
AT bravoisabel studiesonculturesofostreopsiscfovatalifecycleobservations AT vilamagda studiesonculturesofostreopsiscfovatalifecycleobservations AT magadansusana studiesonculturesofostreopsiscfovatalifecycleobservations AT rialpilar studiesonculturesofostreopsiscfovatalifecycleobservations AT rodriguezfrancisco studiesonculturesofostreopsiscfovatalifecycleobservations AT fragasantiago studiesonculturesofostreopsiscfovatalifecycleobservations AT francojosem studiesonculturesofostreopsiscfovatalifecycleobservations AT salammontserrat studiesonculturesofostreopsiscfovatalifecycleobservations |
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1777665939043516416 |