18 Result(s)
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Shinichiro Maruyama
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Article
Open AccessGenomic analysis of an ultrasmall freshwater green alga, Medakamo hakoo
Ultrasmall algae have attracted the attention of biologists investigating the basic mechanisms underlying living systems. Their potential as effective organisms for producing useful substances is also of inter...
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Open AccessGene expression alterations from reversible to irreversible stages during coral metamorphosis
For corals, metamorphosis from planktonic larvae to sedentary polyps is an important life event, as it determines the environment in which they live for a lifetime. Although previous studies on the reef-buildi...
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Open AccessPublisher Correction: Genetic tool development in marine protists: emerging model organisms for experimental cell biology
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Open AccessGenetic tool development in marine protists: emerging model organisms for experimental cell biology
Diverse microbial ecosystems underpin life in the sea. Among these microbes are many unicellular eukaryotes that span the diversity of the eukaryotic tree of life. However, genetic tractability has been limite...
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Evolution of Photosynthetic Eukaryotes; Current Opinion, Perplexity, and a New Perspective
The evolution of eukaryotic photosynthesis marked a major transition for life on Earth, profoundly impacting the atmosphere of the Earth and evolutionary trajectory of an array of life forms. There are about t...
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Open AccessIsolation of uracil auxotroph mutants of coral symbiont alga for symbiosis studies
Coral reef ecosystems rely on stable symbiotic relationship between the dinoflagellate Symbiodinium spp. and host cnidarian animals. The collapse of such symbiosis could cause coral ‘bleaching’ and subsequent hos...
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Double-Membrane-Bounded Organelles: Recent Findings Regarding Division, Inheritance, Structure, and Evolution of the Nucleus, Mitochondria, and Chloroplasts
The nucleus of Cyanidioschyzon merolae has quite a limited set of components. The core and linker histones, H2A.Z, and a centromeric histone variant CenH3 are preserved, but H2A variants including H2A.X, H2A.M, a...
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A blue-light photoreceptor mediates the feedback regulation of photosynthesis
Algae rely on blue-light-sensitive phototropin to trigger induction of LHCRS3, allowing it to dissipate energy from excess light that would otherwise compromise the fitness of the organism.
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Open AccessTreetrimmer: a method for phylogenetic dataset size reduction
With rapid advances in genome sequencing and bioinformatics, it is now possible to generate phylogenetic trees containing thousands of operational taxonomic units (OTUs) from a wide range of organisms. However...
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Article
Open AccessAlgal genomes reveal evolutionary mosaicism and the fate of nucleomorphs
Cryptophyte and chlorarachniophyte algae are transitional forms in the widespread secondary endosymbiotic acquisition of photosynthesis by engulfment of eukaryotic algae. Unlike most secondary plastid-bearing ...
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Open AccessAn extended phylogenetic analysis reveals ancient origin of "non-green" phosphoribulokinase genes from two lineages of "green" secondary photosynthetic eukaryotes: Euglenophyta and Chlorarachniophyta
Euglenophyta and Chlorarachniophyta are groups of photosynthetic eukaryotes harboring secondary plastids of distinct green algal origins. Although previous phylogenetic analyses of genes encoding Calvin cycle ...
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Open AccessEukaryote-to-eukaryote gene transfer gives rise to genome mosaicism in euglenids
Euglenophytes are a group of photosynthetic flagellates possessing a plastid derived from a green algal endosymbiont, which was incorporated into an ancestral host cell via secondary endosymbiosis. However, th...
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Division of cell nuclei, mitochondria, plastids, and microbodies mediated by mitotic spindle poles in the primitive red alga Cyanidioschyzon merolae
To understand the cell cycle, we must understand not only mitotic division but also organelle division cycles. Plant and animal cells contain many organelles which divide randomly; therefore, it has been diffi...
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Open AccessCyanobacterial contribution to the genomes of the plastid-lacking protists
Eukaryotic genes with cyanobacterial ancestry in plastid-lacking protists have been regarded as important evolutionary markers implicating the presence of plastids in the early evolution of eukaryotes. Althoug...
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Open AccessOrigins of a cyanobacterial 6-phosphogluconate dehydrogenase in plastid-lacking eukaryotes
Plastids have inherited their own genomes from a single cyanobacterial ancestor, but the majority of cyanobacterial genes, once retained in the ancestral plastid genome, have been lost or transferred into the ...
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Article
Open AccessA 100%-complete sequence reveals unusually simple genomic features in the hot-spring red alga Cyanidioschyzon merolae
All previously reported eukaryotic nuclear genome sequences have been incomplete, especially in highly repeated units and chromosomal ends. Because repetitive DNA is important for many aspects of biology, comp...
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Article
Insight into the basis of root growth in Arabidopsis thaliana provided by a simple mathematical model
Plant organ growth changes under genetic and environmental influences can be observed as altered cell proliferation and volume growth. The two aspects are mutually dependent and intricately related. For compre...
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Open AccessGenome sequence of the ultrasmall unicellular red alga Cyanidioschyzon merolae 10D
Small, compact genomes of ultrasmall unicellular algae provide information on the basic and essential genes that support the lives of photosynthetic eukaryotes, including higher plants1,2. Here we report the 16,5...
