A5048221264- Marine and coastal plant biology
- Protist diversity and phylogeny
- Algal biology and biofuel production
- Marine and coastal ecosystems
- Photosynthetic Processes and Mechanisms
- Marine Biology and Ecology Research
- Microtubule and mitosis dynamics
- Microbial Community Ecology and Physiology
- Polar Research and Ecology
- Plant Molecular Biology Research
- Biocrusts and Microbial Ecology
- Seaweed-derived Bioactive Compounds
- Coastal wetland ecosystem dynamics
- Diatoms and Algae Research
- Photoreceptor and optogenetics research
- Plant Reproductive Biology
- Genetic and Kidney Cyst Diseases
- Polysaccharides and Plant Cell Walls
- Cephalopods and Marine Biology
- Legume Nitrogen Fixing Symbiosis
- Marine Biology and Environmental Chemistry
- Light effects on plants
- Echinoderm biology and ecology
- Paleontology and Stratigraphy of Fossils
- Plant nutrient uptake and metabolism
Muroran Institute of Technology
2015-2024
Hokkaido University
2015-2024
The genome of Ectocarpus, a model organism for brown algae, has been sequenced. Brown algae are complex photosynthetic organisms that have adapted to life in rocky coastal environments. Genome analysis sheds light on this adaptation and reveals an extended set light-harvesting pigment biosynthesis genes novel metabolic processes such as halide metabolism. Comparative genomic analyses highlight the likely importance family receptor kinases related molecules evolution multicellularity plants,...
Significance The protein Pt43233 is a member of the Cys-Gly-His–rich (CGHR) family, and it was discovered to be previously unidentified carbonic anhydrase (CA), designated as θ-CA. Moreover, targeted lumen pyrenoid-penetrating thylakoid in marine diatom Phaeodactylum tricornutum . Analysis overexpression RNAi mutants suggests this CA essential for photosynthetic efficiency growth diatom. discovery θ-CA within P. implies direct use pH gradient across membrane means supplying CO 2 Calvin...
Abstract Anion transporters sustain a variety of physiological states in cells. Bestrophins (BSTs) belong to Cl− and/or HCO3− transporter family conserved bacteria, animals, algae, and plants. Recently, putative BSTs were found the green alga Chlamydomonas reinhardtii, where they are upregulated under low CO2 (LC) conditions play an essential role CO2-concentrating mechanism (CCM). The BST orthologs also diatoms, secondary endosymbiotic algae harboring red-type plastids, but their functions...
SUMMARY Brown seaweeds are keystone species of coastal ecosystems, often forming extensive underwater forests, that under considerable threat from climate change. Despite their ecological and evolutionary importance, this phylogenetic group, which is very distantly related to animals land plants, still poorly characterised at the genome level. Here we analyse 60 new genomes include all major brown algal orders. Comparative analysis these indicated occurrence several events coinciding...
Brown algae are an important group of multicellular eukaryotes, phylogenetically distinct from both the animal and land plant lineages. Ectocarpus has emerged as a model organism to study diverse aspects brown algal biology, but this system currently lacks effective reverse genetics methodology analyse functions selected target genes. Here, we report that mutations at specific sites generated following introduction CRISPR-Cas9 ribonucleoproteins into cells, using either biolistics or...
Pyrenoids are microcompartments that universally found in the photosynthetic plastids of various eukaryotic algae. They contain ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and play a pivotal role facilitating CO
Brown seaweeds are keystone species of coastal ecosystems, often forming extensive underwater forests, and under considerable threat from climate change. In this study, analysis multiple genomes has provided insights across the entire evolutionary history lineage, initial emergence, through later diversification brown algal orders, down to microevolutionary events at genus level. Emergence lineage was associated with a marked gain new orthologous gene families, enhanced protein domain...
A new cold-adapted Arctic strain of Haematococcus pluvialis from Blomstrandhalvøya Island (Svalbard) is described.This predominantly always in non-motile palmelloid stage.Transmission electron microscopy showed the presence very thick cell wall and abundant lipid vesicles palmelloids, including red green cells.The external morphology motile bi-flagellated cells our similar to H. pluvialis; however it differs physiology.Our adapted live produce astaxanthin low temperature (4-10°C), whilst...
Abstract Background Population structure and genetic diversity of marine organisms in the Northwestern Pacific Ocean exhibited complex patterns. Saccharina japonica is a commercially ecologically important kelp species widely distributed along coast Japan Sea. However, it still poorly known about population genetics phylogeographic patterns wild S. populations on large geographic scale, which an contribution to breeding conservation this crop. Results We collected 612 mitochondrial COI trn...
Brown algae are one of the most developmentally complex groups within eukaryotes. As in many land plants and animals, their main body axis is established early development, when initial cell gives rise to two daughter cells that have apical basal identities, equivalent shoot root identities plants, respectively. We show here mutations Ectocarpus DISTAG (DIS) gene lead loss structures during both gametophyte sporophyte generations. Several abnormalities were observed germinating dis mutants,...
Studies of postglacial range shifts could enhance our understanding seaweed species' responses to climate change and hence facilitate the conservation natural resources. However, distribution dynamics phylogeographic diversification commercially ecologically important kelp Saccharina japonica in Northwest Pacific (NWP) are still poorly surveyed. In this study, we analyzed evolutionary history S. using two mitochondrial markers 24 nuclear microsatellites. A STRUCTURE analysis revealed...
Abstract Among the brown algal lineages, Ectocarpales species have isogamous fertilization in which male and female gametes are morphologically similar. In contrast, much larger than oogamous found many other lineages. It has been reported that plastids of biparentally inherited whereas maternally inherited. both species, mitochondria usually maternally. To investigate whether there is any relationship between modes inheritance organellar genome architecture, we sequenced six plastid genomes...
We examined the relationship between spindle orientation and determination site of cytokinesis in brown algal cells using polyspermic zygotes Scytosiphon lomentaria. When two male gametes fuse with one female gamete, zygote has pairs centrioles derived from three chloroplasts gametes. Just before mitosis, duplicate migrate towards future mitotic poles. Spindle MTs develop or four poles are formed. In a tri-polar spindle, pair shifts away otherwise, exist adjoining at pole. Chromosomes...
SUMMARY Patterns of inheritance chloroplasts and mitochondria were examined by fluorescence microscopy haplotype genome markers in the isogamous brown alga Scytosiphon lomentaria (Lyngbye) Link. Germination zygote this species was unilateral, growing thallus developed entirely from germ tube, original cell did not develop except for formation a hair. Inheritance biparental, partitioning two parental into first sporophytic cells accidental: either maternal or paternal chloroplast migrated...