MULTIPLE ROUTES OF SEXUALITY IN ALEXANDRIUM TAYLORI (DINOPHYCEAE) IN CULTURE 1

@article{Figueroa2006MULTIPLERO,
  title={MULTIPLE ROUTES OF SEXUALITY IN ALEXANDRIUM TAYLORI (DINOPHYCEAE) IN CULTURE 1},
  author={R. Figueroa and I. Bravo and E. Garc{\'e}s},
  journal={Journal of Phycology},
  year={2006},
  volume={42}
}
Alexandrium taylori Balech is a cyst‐forming dinoflagellate species responsible for recurrent blooms in Mediterranean coastal waters. The nuclear development of the cells during the sexual cycle and the effect of different external nitrate and phosphate levels were studied. Nuclear fusion of gametes occurred 6–12 h after the complete cytoplasmic fusion. The U‐shaped nuclei fused through the end of one nucleus and the mid‐area of the other. The mobile and biflagellated zygote had a large, U… Expand
The significance of sexual versus asexual cyst formation in the life cycle of the noxious dinoflagellate Alexandrium peruvianum
TLDR
Sexuality was confirmed by the presence of fusing gamete pairs and longitudinally biflagellated planozygotes after outcrossing of compatible clonal strains, and the clonal cultures had low levels of self-compatibility. Expand
The Hidden Sexuality of Alexandrium Minutum: An Example of Overlooked Sex in Dinoflagellates
TLDR
The results show that planozygotes behave like a population with an “encystment-independent” division cycle, which is light-controlled and follows the same Light:Dark (L:D) pattern as the cycle governing the haploid mitosis, which would imply that this species is not haplontic, as previously considered, but biphasic, because individuals could undergo mitotic divisions in both the sexual and asexual phases. Expand
Life cycle stages of the benthic palytoxin-producing dinoflagellate, Ostreopsis cf. ovata (Dinophyceae)
TLDR
The results suggest that cysts embedded in abundant mucilage in a bloom-derived incubated sample, were able to germinate for as long as 6 months after their formation, constitute the overwintering population that causes recurrent blooms of O. ovata in some areas of the Mediterranean Sea. Expand
Comparative study of the life cycles of Alexandrium tamutum and Alexandrium minutum (Gonyaulacales, Dinophyceae) in culture 1
TLDR
In both species, cyst appearance needed to be explained by the existence of more than two sexual types (+/–), which indicates a complex heterothallic mating type, however, planozygotes of both species may divide instead of encysting. Expand
The intricacies of dinoflagellate pellicle cysts: The example of Alexandrium minutum cysts from a bloom-recurrent area (Bay of Baiona, NW Spain)
TLDR
A comparison of the morphology and germination times of three different types of Alexandrium minutum cysts collected during a seasonal bloom in the Bay of Baiona showed that the temporal distribution of these short-term cysts during the bloom period followed a pattern very similar to that of vegetative cells. Expand
The life history of the toxic marine dinoflagellate Protoceratium reticulatum (Gonyaulacales) in culture.
TLDR
Asexual and sexual life cycle events were studied in cultures of the toxic marine dinoflagellate Protoceratium reticulatum by examining the mating type as well as the morphology of the sexual stages and nuclei. Expand
New insights on the life cycle stages of the toxic benthic dinoflagellate Ostreopsis cf. ovata
TLDR
At least two types of cyst were formed, a non-dormant cyst germinating within 2 days and a resting cyst which is able to germinate after a 5-month dormancy only at temperatures over 25 °C. Expand
COMPARATIVE STUDY OF THE LIFE CYCLES OF ALEXANDRIUM TAMUTUM AND ALEXANDRIUM MINUTUM (GONYAULACALES, DINOPHYCEAE) IN CULTURE
The microalgal genus Alexandrium includes species known to produce paralytic shellfish poisoning (PSP). Due to the importance of discriminating between HAB-forming species, we compared theExpand
Toxin content differs between life stages of Alexandrium fundyense (Dinophyceae)
Different life stages of two mating-compatible clones of the paralytic shellfish toxin (PST)-producing dinoflagellate Alexandrium fundyense Balech were separated using a combination of techniques;Expand
INTERACTIVE EFFECTS OF SALINITY AND TEMPERATURE ON PLANOZYGOTE AND CYST FORMATION OF ALEXANDRIUM MINUTUM (DINOPHYCEAE) IN CULTURE 1
TLDR
Two different approaches were used to clarify the relevance of environmental factors on planozygote and cyst formation of the toxic dinoflagellate Alexandrium minutum Halim to determine how salinity, temperature, and the density of the initial cell inoculum affect planozygotes and resting‐cyst formation. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 65 REFERENCES
THE LIFE HISTORY OF ALEXANDRIUM TAYLORI (DINOPHYCEAE)
TLDR
The gonyaulacoid dinoflagellate Alexandrium taylori Balech is reported for the first time from Italian waters and exhibited isogamy, which involved an increase in size and final shedding of flagella and theca. Expand
NUCLEAR FEATURES AND EFFECT OF NUTRIENTS ON GYMNODINIUM CATENATUM (DINOPHYCEAE) SEXUAL STAGES 1
TLDR
The nuclear development of the cells during the sexual cycle and the effect of different nitrate and phosphate external levels on sexual stages were studied and suggested an uncoordinated meiosis in both encysting and non‐encysting zygotes. Expand
The life cycle of Gyrodinium instriatum (Dinophyceae) in culture *
TLDR
Gyrodinium instriatum has an alternative cycle between vegetative cells and zygotes without a hypnozygote stage, however, cysts of this species were transformed from large motile cells (pre‐cyst cells) which are oblong and dorso‐ventrally flattened in shape, which may indicate that cysts in this species are of zygote origin. Expand
LIFE HISTORY AND IN SITU GROWTH RATES OF ALEXANDRIUM TAYLORI (DINOPHYCEAE, PYRROPHYTA)
TLDR
Alexandrium taylori Balech is a phototrophic marine dinoflagellate that produced recurrent blooms during the summer months of 1994 to 1997 in La Fosca beach and showed in situ diurnal vertical migration with an increase of vegetative cells in the water column in the morning through midday, with concentrations peaking in the afternoon followed by lower levels at night. Expand
SEXUAL REPRODUCTION AND TWO DIFFERENT ENCYSTMENT STRATEGIES OF LINGULODINIUM POLYEDRUM (DINOPHYCEAE) IN CULTURE 1
TLDR
Mating experiments revealed the existence of two sexual types (+/−), which were enough to explain resting cyst appearance (simple heterothallism) and Morphological aspects and timing of gamete mating, fusion, and the efficiency of encystment under different external levels of nitrate and phosphate were analyzed. Expand
SEXUAL REPRODUCTION OF PERIDINUM CINCTUM F. OVOPLANUM (DINOPHYCEAE) 1, 2
Sexual reproduction is induced in the dinoflagelate Peridinium cinctum f. ovoplanum Lindemann when exponentially growing cells are inoculated into nitrogen deficient medium. Small, naked vegetativeExpand
SEXUALITY AND CYST FORMATION IN THE DINOFLAGELLATE GONYAULAX TAMARENSIS: CYST YIELD IN BATCH CULTURES 1
TLDR
Encystment of the toxic dinoflagellate Gonyaulax tamarensis Lebour (var. excavata) was monitored in batch cultures exposed to a variety of nutritional and environmental treatments, and cyst formation was negligible in nutrient‐replete medium. Expand
Role of temporary cysts in the population dynamics of Alexandrium taylori (Dinophyceae)
TLDR
It is proposed that temporary cyst formation in this species is a tool for reducing population losses and the production of temporary cysts can be an advantage since part of the population is stored in the sediments. Expand
THE SEXUAL LIFE CYCLES OF PFIESTERIA PISCICIDA AND CRYPTOPERIDINIOPSOIDS (DINOPHYCEAE) 1
TLDR
Sexual life cycle events in Pfiesteria piscicida and cryptoperidiniopsoid heterotrophic dinoflagellates were determined by following the development of isolated gamete pairs in single‐drop microcultures with cryptophyte prey, with dramatic swirling chromosome movements found in zygote nuclei before division. Expand
ESTUARINE HETEROTROPHIC CRYPTOPERIDINIOPSOIDS (DINOPHYCEAE): LIFE CYCLE AND CULTURE STUDIES 1
TLDR
In the seven clonal isolates examined, reproduction was strongly linked to the availability of prey cells, and resistance of reproductive cysts to antimicrobial treatments was examined, and a simple high‐yield technique was developed for population synchronization while ridding the dinoflagellates of most contaminating vacuolar prey DNA and external contaminants. Expand
...
1
2
3
4
5
...