Publications by authors named "Mutsuo Ichinomiya"
Article Synopsis
- The order Parmales consists of tiny eukaryotic marine phytoplankton with silica plates and is closely related to diatoms, a highly successful group of phytoplankton.
- Researchers compared the genomes of eight parmaleans and five diatoms to understand their physiological and evolutionary differences.
- The study found that parmaleans are likely phago-mixotrophs, while diatoms evolved to primarily rely on photosynthesis, losing genes related to phagocytosis and developing specialized nutrient uptake mechanisms.
We present the first draft whole-genome sequence for the Parmales (Bolidophyceae, Heterokonta), a picoplanktonic sister group of diatoms, using a f. strain that was isolated from the Oyashio region in the western North Pacific Ocean.
View Article and Find Full Text PDFTriparma laevis f. inornata is a unicellular alga belonging to the Bolidophyceae, which is most closely related to diatoms. Like diatoms, T.
View Article and Find Full Text PDFWe sequenced the complete plastid and mitochondrial genomes of the unicellular marine phytoplankton Triparma laevis, belonging to the order Parmales (Heterokonta). The cells of Parmales are surrounded by silicified cell walls, similar to Bacillariophyta (diatoms). T.
View Article and Find Full Text PDFArticle Synopsis
- The parmalean algae, specifically Triparma laevis, are important for studying the evolution of diatoms and have a siliceous wall similar to them.
- Research on T. laevis revealed that during different phases of cell division, microtubules (MT) are organized in unique ways, challenging previous assumptions about MT formation.
- The findings suggest that the structure of the spindle during mitosis in T. laevis is similar to that in diatoms, indicating a potential evolutionary connection.
Bolidomonas is a genus of picoplanktonic flagellated algae that is closely related to diatoms. Triparma laevis, a species belonging to the Parmales, which are small cells with a siliceous covering, has been shown to form a monophyletic group with Bolidomonas. We isolated several novel strains of Bolidophyceae that have permitted further exploration of the diversity of this group using nuclear, plastidial and mitochondrial genes.
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- Parmales is a group of small unicellular marine phytoplankton found in various oceanic regions and is significant for understanding the evolution of diatoms.
- The study on Triparma laevis showed that while silicon is essential for forming its distinctive cell plates, low silicon levels do not affect its growth rate, allowing the cells to continue dividing even without plates.
- Remarkably, when transferred back to a silicon-rich environment, the cells could regenerate their lost plates, indicating a unique response compared to typical diatoms.
A small siliceous species of marine phytoplankton, order Parmales (Heterokonta), was isolated and characterized for the first time with the aid of a fluorescent silicon tracer 2-(4-pyridyl)-5-([4-(2-dimethylaminoethylaminocarbamoyl)-methoxy]phenyl)oxazole (PDMPO). This dye was easily detected by clear fluorescence in newly produced silica cell plates. Our isolate was surrounded by eight smooth plates without any ornamentation, suggesting a similarity to Triparma laevis B.
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