Choricystis

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Genus of algae

title: "Choricystis" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["trebouxiophyceae-genera", "trebouxiophyceae", "enigmatic-algae-taxa"] description: "Genus of algae" topic_path: "general/trebouxiophyceae-genera" source: "https://en.wikipedia.org/wiki/Choricystis" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of algae ::

| image = Choricystis krienitzii.png | image_caption = Choricystis krienitzii | taxon = Choricystis | authority = (Skuja) Fott, 1976 | type_species = Choricystis minor | type_species_authority = (Skuja, 1948) Fott, 1976 | subdivision_ranks = Species | subdivision =

Choricystis is a genus of green algae in the class Trebouxiophyceae, considered a characteristic picophytoplankton in freshwater ecosystems. Choricystis, especially the type species **, has been proposed as an effective source of fatty acids for biofuels. Choricystis algacultures have been shown to survive on wastewater. In particular, Choricystis has been proposed as a biological water treatment system for industrial waste produced by the processing of dairy goods.

Choricystis have been found in natural bodies of water in South America, North America, Europe, Asia, and Antarctica. They have been observed as an endosymbiont of freshwater sponges as well as ciliates like Paramecium bursaria.

Description

Choricystis consists of solitary cells without a mucilage sheath surrounding them. Cells are uninucleate with a single parietal chloroplast. Chloroplasts lack pyrenoids. Reproduction occurs asexually by the formation of autospores; in field conditions, usually two are produced per cell, but in culture four per cell may be present as well. Zoospores or sexual reproduction have not been observed in this genus.

Identification of species within this genus is difficult because of few distinguishing morphological characters; species are now distinguished from each other using DNA barcodes.

Use as a biofuel

Triglycerides and other lipids can be transesterified to produce fatty acid methyl esters, the primary component of biodiesel fuels. Because of their high lipid content and rate of lipid production, Choricystis algae have been suggested as effective microalgae for industrial biofuel production. Molecular profiles of C. minor have noted its high proportion of neutral (as opposed to polar) lipids, considered preferable in biodiesel production.

References

References

  1. (2011). "The systematics of ''Zoochlorella'' revisited employing an integrative approach". Environmental Microbiology.
  2. {{AlgaeBase genus
  3. (1996). "Picoplanktonic Choricystis species (Chlorococcales, Chlorophyta) and problems surrounding the morphologically similar 'Nannochloris-like algae'". Phycologia.
  4. (2010). "Potential fuel oils from the microalga ''Choricystis minor''". Journal of Chemical Technology and Biotechnology.
  5. (2016). "Culture medium influence on growth, fatty acid, and pigment composition of ''Choricystis minor'' var. ''minor'': a suitable microalga for biodiesel production". Journal of Applied Phycology.
  6. (2021). "Synergistic effect of growth conditions and organic carbon sources for improving biomass production and biodiesel quality by the microalga ''Choricystis minor'' var. ''minor''". Science of the Total Environment.
  7. (2015). "Treatment of second cheese whey effluents using a ''Choricystis''-based system with simultaneous lipid production". Journal of Chemical Technology and Biotechnology.
  8. (2017). "Isolation and identification of ''Choricystis minor'' Fott and mass cultivation for oil production". Algal Research.
  9. (2006). "Physiological and biochemical characterization of antarctic isolate ''Choricystis minor'' during oxidative stress at different temperatures and light intensities". Bulgarian Academy of Sciences.
  10. (2020). "''Choricystis'' and ''Lewiniosphaera'' gen. nov. (Trebouxiophyceae Chlorophyta), two different green algal endosymbionts in freshwater sponges". Symbiosis.
  11. (2020). "The genetic diversity and phylogeny of green microalgae in the genus ''Choricystis'' (Trebouxiophyceae, Chlorophyta) in Lake Baikal". Limnology.
  12. (2020). "Algal Diversity in ''Paramecium bursaria'': Species Identification, Detection of ''Choricystis parasitica'', and Assessment of the Interaction Specificity". Diversity.
  13. (1996). "Picoplanktonic ''Choricystis'' species (Chlorococcales, Chlorophyta) and problems surrounding the morphologically similar '''Nannochloris''-like algae'". Phycologia.
  14. (2001). "Biodiesel fuel production by transesterification of oils". Journal of Bioscience and Bioengineering.
  15. (2006). "Technical aspects of biodiesel production by transesterification—a review". Renewable and Sustainable Energy Reviews.
  16. (2015). "Evaluation of fatty acid composition of the microalgae ''Choricystis minor'' var. ''minor'' according to two different nutrient feeding strategies". Journal of Renewable and Sustainable Energy.
  17. (2022). "Production and quality assessment of biodiesel obtained by thermal process from wet microalgae biomass of ''Choricystis minor'' var. ''minor''". Biofuels.
  18. (2018). "''Choricystis minor'' var. ''minor'' lipids: Extraction using conventional and pressurized solvents and assessment of their potential to produce fatty acid methyl esters". Algal Research.
  19. (2019). "Characteristics of tropical freshwater microalgae ''Micractinium conductrix'', ''Monoraphidium'' sp. and ''Choricystis parasitica'', and their potency as biodiesel feedstock". [[Heliyon]].
  20. (2011). "Application of the standard addition method for the absolute quantification of neutral lipids in microalgae using Nile red". Journal of Microbiological Methods.

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trebouxiophyceae-generatrebouxiophyceaeenigmatic-algae-taxa