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Updated: Jan 22, 2026
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Model of Ischemic Heart Disease and Video-Based Comparison of Cardiomyocyte Contraction Using hiPSC-Derived Cardiomyocytes
Published on: May 5, 2020
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Scrippsiella acuminata versus Scrippsiella ramonii: A Physiological Comparison
Elena Fagín1, Isabel Bravo1, José Luis Garrido2
1Departamento de Microalgas Nocivas, IEO, Vigo, Spain.
Summary
This study reveals distinct cell cycle and sexuality differences between two harmful algal bloom-forming dinoflagellate species, Scrippsiella ramonii and Scrippsiella acuminata, using flow cytometry and genetic analysis.
Area of Science:
- Marine biology
- Phycology
- Cell biology
Background:
- Scrippsiella is a cosmopolitan dinoflagellate genus known for forming harmful algal blooms.
- Significant physiological, morphological, and genetic variability within Scrippsiella suggests the presence of cryptic species.
Purpose of the Study:
- To compare the cell cycle and life cycle of two distinct Scrippsiella species: S. ramonii and S. acuminata.
- To investigate potential cryptic speciation within the Scrippsiella genus.
Main Methods:
- Flow cytometric analyses to assess cell cycle progression.
- Internally transcribed spacer (ITS) rDNA sequencing for genetic comparison.
- High-performance liquid chromatography (HPLC) for pigment profiling.
Main Results:
- Cell cycle progression is light-controlled and differs between the species, with distinct G2/M phase timing.
- Pigment profiles correlate with observed color differences between S. acuminata and S. ramonii.
- Evidence of sexuality, including 4C stages and planozygotes, was found in S. ramonii, while S. acuminata showed clonal, potentially heterothallic behavior.
Conclusions:
- The study highlights significant differences in cell cycle regulation and reproductive strategies between S. ramonii and S. acuminata.
- These findings support the existence of distinct species within the Scrippsiella genus and contribute to understanding harmful algal bloom dynamics.
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