The sexual phase of the diatom Pseudo-nitzschia multistriata: cytological and time-lapse cinematography characterization
@article{Scalco2015TheSP, title={The sexual phase of the diatom Pseudo-nitzschia multistriata: cytological and time-lapse cinematography characterization}, author={Eleonora Scalco and Alberto Amato and Maria Immacolata Ferrante and Marina Montresor}, journal={Protoplasma}, year={2015}, volume={253}, pages={1421-1431} }
Pseudo-nitzschia is a thoroughly studied pennate diatom genus for ecological and biological reasons. Many species in this genus, including Pseudo-nitzschia multistriata, can produce domoic acid, a toxin responsible for amnesic shellfish poisoning. Physiological, phylogenetic and biological features of P. multistriata were studied extensively in the past. Life cycle stages, including the sexual phase, fundamental in diatoms to restore the maximum cell size and avoid miniaturization to death…
18 Citations
A Metabolomics Exploration of the Sexual Phase in the Marine Diatom Pseudo-nitzschia multistriata
- BiologyMarine drugs
- 2020
It is hypothesized that the amount and nature of cellular metabolites varies along the mating process, and the role of highly regulated compounds such as 7-dehydrodesmosterol, whose changes in abundance were the highest in the experiment, oleamide, ectoine, or trigonelline is discussed.
Trade-off between sex and growth in diatoms: Molecular mechanisms and demographic implications
- Environmental ScienceScience advances
- 2022
Diatoms are fast-growing and winning competitors in aquatic environments, possibly due to optimized growth performance. However, their life cycles are complex, heteromorphic, and not fully…
Sexual reproduction and genetic polymorphism within the cosmopolitan marine diatom Pseudo-nitzschia pungens
- BiologyScientific Reports
- 2020
The results implicate that gene exchange and mixing between different clades are still possible, and that sexual reproduction is a significant ecological strategy to maintain the genetic diversity within this diatom species.
MRP3 is a sex determining gene in the diatom Pseudo-nitzschia multistriata
- BiologyNature Communications
- 2018
In the diatom Pseudo-nitzschia multistriata, the gene MRP3 regulates mating type and the expression of four other mating-type biased genes, indicating that they lie downstream.
Pheromone Mediated Sexual Reproduction of Pennate Diatom Cylindrotheca closterium
- BiologyJournal of chemical ecology
- 2021
Pheromone guided mating in the coastal raphid diatom Cylindrotheca closterium is described and it is shown that the two mating types (mt+ and mt−) have distinct functions.
The Role of Life Cycle Characteristics in Harmful Algal Bloom Dynamics
- Environmental Science
- 2018
These life cycles are clearly adaptable to a broad range of environments as shown by their widespread distribution and abundance and are likely to provide further insights into algal species ecology broadly, including responses to global climate change, ocean acidification, and coastal nutrient enrichment.
Pseudo-nitzschia, Nitzschia, and domoic acid: New research since 2011.
- Environmental ScienceHarmful algae
- 2018
Finding a partner in the ocean: molecular and evolutionary bases of the response to sexual cues in a planktonic diatom
- Biology, Environmental ScienceThe New phytologist
- 2017
The controllable life cycle and genome sequence of P. multistriata allow the reconstruction of changes occurring in diatoms in a key phase of their life cycle, providing hints on the evolution and putative function of their genes and empowering studies on sexual reproduction.
Interspecific plastidial recombination in the diatom genus Pseudo‐nitzschia
- BiologyJournal of phycology
- 2015
Signs of hybridization were evident in four of five clusters, suggesting that, in diatoms, plastidial recombination is not absent and hybridization can play a role in speciation of Pseudo‐nitzschia spp.
Effects of elutriates from contaminated coastal sediments on different life cycle phases of planktonic diatoms.
- Environmental ScienceMarine environmental research
- 2020
References
SHOWING 1-10 OF 66 REFERENCES
SEXUAL REPRODUCTION IN THE PENNATE DIATOMS PSEUDO‐NITZSCHIA MULTISERIES AND P. PSEUDODELICATISSIMA (BACILLARIOPHYCEAE)
- Biology
- 1998
The observations of allogamous reproduction are consistent with those reported for other dioecious pennate diatoms and knowledge of the pattern and timing of sexual reproduction in Pseudo‐nitzschia spp.
Sexual and vegetative phases in the planktonic diatom Pseudo-nitzschia multistriata.
- Environmental Science, Biology
- 2009
LIFE CYCLE, SIZE REDUCTION PATTERNS, AND ULTRASTRUCTURE OF THE PENNATE PLANKTONIC DIATOM PSEUDO‐NITZSCHIA DELICATISSIMA (BACILLARIOPHYCEAE) 1
- Environmental Science, Biology
- 2005
Cell morphology, valve ultrastructure and morphometry of parental, F1‐generation strains, and the progeny of crosses between parental and F1 strains are investigated, and variability in cell shape was recorded in the largest cells of the F1 generation as well as in valves with an abnormal arrangement of poroids.
The dynamics of sexual phase in the marine diatom Pseudo‐nitzschia multistriata (Bacillariophyceae)
- BiologyJournal of phycology
- 2014
The results of the experiments suggest that the signaling that triggers the sexual phase is favored when cells can accumulate, reducing the distance between them and facilitating contacts and/or the perception of chemical cues, which help understanding the conditions at which sex occurs in the natural environment.
Morphology, phylogeny, and sexual cycle of Pseudo-nitzschia mannii sp. nov. (Bacillariophyceae): a pseudo-cryptic species within the P. pseudodelicatissima complex
- Biology
- 2008
The morphology of the vegetative cell and sexual stages of Pseudo-nitzschia mannii sp.
MASS SEXUAL REPRODUCTION IN THE TOXIGENIC DIATOMS PSEUDO‐NITZSCHIA AUSTRALIS AND P. PUNGENS (BACILLARIOPHYCEAE) ON THE WASHINGTON COAST, USA 1
- Environmental Science
- 2010
Sexual reproduction is documented for the first time in field populations of the pennate diatoms Pseudo‐nitzschia australis Freng. and P. pungens (Grunow ex Cleve) Hasle (var. cingulata Villac and…
Novel Sex Cells and Evidence for Sex Pheromones in Diatoms
- BiologyPloS one
- 2011
These pheromone experiments are the first studies in which gametogenesis has been induced in diatoms by cell-free exudates, opening new possibilities for molecular ‘dissection’ of sexualization.
Effect of light: dark cycles and cell apical length on the sexual reproduction of the pennate diatom Pseudo-nitzschia multiseries (Bacillariophyceae) in culture
- Biology, Environmental Science
- 2000
Results from this study indicate that the most biologically successful light regimen in culture corresponds in nature to the day length of the fall bloom from which these clones were isolated.
Pseudo-nitzschia (Bacillariophyceae) species, domoic acid and amnesic shellfish poisoning: revisiting previous paradigms
- Environmental Science, Biology
- 2012
Gaps in knowledge include further information about the whole genome of Pseudo-nitzschia, mechanisms of DA production and decline, presence or absence of a resting stage, heterotrophic ability, impact of viruses and fungi, and a more complete description of the ecological and physiological roles of DA.