Mother Cell Wall Cleavage during Filament Formation in &lt;i&gt;Stichococcus bacillaris&lt;/i&gt; (Trebouxiophyceae, Chlorophyta)

Yamamoto, Maki; Handa, Shinji; Kawachi, Masanobu; Miyamura, Shinichi; Nagumo, Tamotsu; Hirata, Aiko; Kawano, Shigeyuki

doi:10.1508/cytologia.81.35

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…To the best of our knowledge, we are not aware of transmission electron micrographs of the genus Diplosphaera. However, there are some reports from the closely related Stichococcus, which exhibited smooth cell wall surfaces (Pickett-Heaps 1974;Yamamoto et al 2016). Yamamoto et al (2016) showed that dividing Stichococcus cells are surrounded by a mother cell wall that is then disrupted, being a distinct structure from what is observed here.…”

Section: Discussionmentioning

confidence: 51%

“…However, there are some reports from the closely related Stichococcus, which exhibited smooth cell wall surfaces (Pickett-Heaps 1974;Yamamoto et al 2016). Yamamoto et al (2016) showed that dividing Stichococcus cells are surrounded by a mother cell wall that is then disrupted, being a distinct structure from what is observed here. Therefore, our data of the outer cell wall layer in D. chodatii with a fuzzy hair-like appearance are novel, and likely support the lifestyle of this epiphytic alga, giving a structural basis for adhesion.…”

Section: Discussionmentioning

confidence: 51%

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Ecophysiological, morphological, and biochemical traits of free-living Diplosphaera chodatii (Trebouxiophyceae) reveal adaptation to harsh environmental conditions

et al. 2021

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Single-celled green algae within the Trebouxiophyceae (Chlorophyta) are typical components of terrestrial habitats, which often exhibit harsh environmental conditions for these microorganisms. This study provides a detailed overview of the ecophysiological, biochemical, and ultrastructural traits of an alga living on tree bark. The alga was isolated from a cypress tree in the Botanical Garden of Innsbruck (Austria) and identified by morphology and molecular phylogeny as Diplosphaera chodatii. Transmission electron microscopy after high-pressure freezing (HPF) showed an excellent preservation of the ultrastructure. The cell wall was bilayered with a smooth inner layer and an outer layer of polysaccharides with a fuzzy hair-like appearance that could possibly act as cell-cell adhesion mechanism and hence as a structural precursor supporting biofilm formation together with the mucilage observed occasionally. The photosynthetic-irradiance curves of D. chodatii indicated low light requirements without photoinhibition at high photon flux densities (1580 μmol photons m−2 s−1) supported by growth rate measurements. D. chodatii showed a high desiccation tolerance, as 85% of its initial value was recovered after controlled desiccation at a relative humidity of ~10%. The alga contained the low molecular weight carbohydrates sucrose and sorbitol, which probably act as protective compounds against desiccation. In addition, a new but chemically not elucidated mycosporine-like amino acid was detected with a molecular mass of 332 g mol−1 and an absorption maximum of 324 nm. The presented data provide various traits which contribute to a better understanding of the adaptive mechanisms of D. chodatii to terrestrial habitats.

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Section: Discussionmentioning

confidence: 51%

Section: Discussionmentioning

confidence: 51%

Ecophysiological, morphological, and biochemical traits of free-living Diplosphaera chodatii (Trebouxiophyceae) reveal adaptation to harsh environmental conditions

et al. 2021

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“…Algae are the most important contributors to the environment because they perform 40% of photosynthesis on earth (Andersen 1992). Algae are also the most diverse organisms with over 0.2 million species (Guarnieri 2013) and varied morphologies (Camaya et al 2016, Higuchi et al 2016, Kuroiwa et al 2014, Kuroiwa et al 2015, Ota et al 2014, Sugasawa et al 2015, Suzuki et al 2014, Takahashi et al 2014, Takeshita et al 2015, Yamamoto et al 2016. About 1 to 2 billion years ago, a primitive eukaryotic cell took up a cyanobacterium in the first endosymbiosis and evolved into algae with plastids derived from the endosymbiotic cyanobacterium (McFadden 2014).…”

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confidence: 99%

Planimal Cells: Artificial Photosynthetic Animal Cells Inspired by Endosymbiosis and Photosynthetic Animals

Matsunaga

2018

CYTOLOGIA

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I propose a new concept of artificial photosynthetic animal cells as planimal cells. Secondary endosymbiosis, symbiotic algae in animal cells and kleptoplasty evoke algae as the most fascinating autotrophic organisms for the creation of planimal cells. Strategies for the generation of planimal cells include three approaches, cell fusion between algae and animal cells, microinjection of algae into the cytoplasm of a host animal cell and creation of synthetic chimeric chromosomes with both algae and animal genomes. Planimal cells will contribute to overcoming global food problems by reducing energy consumption. Combining planimal cells with medical regeneration techniques will enable photosynthetic therapies. In the future, heterotrophs with planimal cells will support migration to other planets under the harsh conditions through long-distance space travel.

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Cell wall layers delimit cell groups derived from cell division in the foliose trebouxiophycean alga Prasiola japonica

et al. 2018

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The cells in the foliose thallus of trebouxiophycean alga Prasiola japonica apparently develop into 2 × 2 cell groups composed of two two-celled groups, each of which is a pair of derivative cells of the latest cell division. In the present study, the structural features of cell walls of the alga P. japonica concerning the formation of the cell groups were investigated using histochemical methods. Thin cell layers stained by Calcofluor White appeared to envelope the two-celled and four-celled groups separately and, hence, separated them from neighboring cell groups, and the Calcofluor White-negative gaps between neighboring four-celled groups were specifically stained by lectins, such as soybean agglutinin, jacalin, and Vicia villosa lectin conjugated with fluorescein. These results indicated that the Calcofluor White-positive cell wall layer of parent cell that existed during two successive cell divisions structurally distinguished two-celled and four-celled groups from others in this alga. Moreover, the results suggested that the cell wall components of the Calcofluor White-negative gaps would possibly contribute to the formation of the planar thallus through lateral union of the cell groups.

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Mother Cell Wall Cleavage during Filament Formation in <i>Stichococcus bacillaris</i> (Trebouxiophyceae, Chlorophyta)

Cited by 6 publications

References 9 publications

Ecophysiological, morphological, and biochemical traits of free-living Diplosphaera chodatii (Trebouxiophyceae) reveal adaptation to harsh environmental conditions

Ecophysiological, morphological, and biochemical traits of free-living Diplosphaera chodatii (Trebouxiophyceae) reveal adaptation to harsh environmental conditions

Planimal Cells: Artificial Photosynthetic Animal Cells Inspired by Endosymbiosis and Photosynthetic Animals

Cell wall layers delimit cell groups derived from cell division in the foliose trebouxiophycean alga Prasiola japonica

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