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Sagenista ( الإنجليزية )

المقدمة من wikipedia EN

Sagenista is a group of heterokonts containing the labyrinthulids and Eogyrea, a class of yet uncultured protists. Originally, it contained the Labyrinthulids and bicosoecids. The bicosoecids have been removed, and Eogyrea were added, in order to make the group monophyletic.[2][3][4][5]

Some have a special organelle called a bothrosome (or sagenogenetosome). It is usually found in a marine environments rich in algae and sea grass. It is capable of movement by use of this organelle.

They are generally decomposers. They are cultivated for their active production of Omega-3 fatty acids. These acids are used as an approved additive for animal feed.

There is a debate about whether some species of Sagenista contains the photosynthetic pigment chlorophyll C.

Bothrosome

They are capable of excreting an extoplasmic net of filaments for cells to glide upon. These tiny filaments provide a network for cells to travel upon to soak up nutrients from the surrounding environment.

Examples

  • Labyrinthula: Possesses a bothrosome. It is being studied for its pathogenic nature in marine environments. It has caused wasting disease in eelgrass, Zostera marina.[6][7]

References

  1. ^ Cavalier-Smith, T. (1995). Membrane heredity, symbiogenesis, and the multiple origins of algae. In: Arai, R., Kato, M., Doi, Y. (eds). Biodiversity and evolution. The National Science Museum Foundation. Tokyo, pp 75-114.
  2. ^ "Browse taxonomic tree". Catalogue of Life : 2008 Annual Checklist.
  3. ^ Cavalier-Smith, T.; Chao, Ema E.-Y. (2006). "Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista)". Journal of Molecular Evolution. 62 (4): 388–420. Bibcode:2006JMolE..62..388C. doi:10.1007/s00239-004-0353-8. PMID 16557340. S2CID 29567514.
  4. ^ Baldauf, Sandra L. (2008). "An overview of the phylogeny and diversity of eukaryotes" (PDF). Journal of Systematics and Evolution. 46 (3): 263–273. doi:10.3724/SP.J.1002.2008.08060 (inactive 31 December 2022).{{cite journal}}: CS1 maint: DOI inactive as of December 2022 (link)
  5. ^ Cavalier-Smith, T.; Scoble, J. M. (2013). "Phylogeny of Heterokonta: Incisomonas marina, a uniciliate gliding opalozoan related to Solenicola (Nanomonadea), and evidence that Actinophryida evolved from raphidophytes". European Journal of Protistology. 49 (3): 328–353. doi:10.1016/j.ejop.2012.09.002. PMID 23219323.
  6. ^ Muehlstein, Lisa K.; Porter, David; Short, Frederick T. (1 January 1991). "Labyrinthula zosterae sp. nov., the Causative Agent of Wasting Disease of Eelgrass, Zostera marina". Mycologia. 83 (2): 180–191. doi:10.2307/3759933. JSTOR 3759933.
  7. ^ Ralph & Short 2002.
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Sagenista: Brief Summary ( الإنجليزية )

المقدمة من wikipedia EN

Sagenista is a group of heterokonts containing the labyrinthulids and Eogyrea, a class of yet uncultured protists. Originally, it contained the Labyrinthulids and bicosoecids. The bicosoecids have been removed, and Eogyrea were added, in order to make the group monophyletic.

Some have a special organelle called a bothrosome (or sagenogenetosome). It is usually found in a marine environments rich in algae and sea grass. It is capable of movement by use of this organelle.

They are generally decomposers. They are cultivated for their active production of Omega-3 fatty acids. These acids are used as an approved additive for animal feed.

There is a debate about whether some species of Sagenista contains the photosynthetic pigment chlorophyll C.

ترخيص
cc-by-sa-3.0
حقوق النشر
Wikipedia authors and editors
النص الأصلي
زيارة المصدر
موقع الشريك
wikipedia EN