Sagenista
| Sagenista | |
|---|---|
| |
| Aplanochytrium, a labyrinthulid | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Bigyra |
| Subphylum: | Sagenista Cavalier- Smith, 1995[1] stat. n. 2006 |
| Groups | |
| |
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.[citation needed]
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.[citation needed]
There is a debate about whether some species of Sagenista contain the photosynthetic pigment chlorophyll C.[citation needed]
Bothrosome
[edit]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.[citation needed]
Examples
[edit]- 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
[edit]- ^ 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.
- ^ "Browse taxonomic tree". Catalogue of Life : 2008 Annual Checklist.[permanent dead link]
- ^ 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.
- ^ 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 1 November 2024).
{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link) - ^ 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.
- ^ 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.
- ^ Ralph & Short 2002.
Bibliography
[edit]- Gelenter, Wendy; Stowell, Larry J (2003). "Progress in understanding rapid blight of cool-season turf". PACE Turfgrass Research Institute Public Edition. 9: 1–4.
- General Mycology. Dept. of Plant Biology, Washington State University.
- Introduction to the Sagenista. Museum of Paleontology, UC-Berkeley.
- Labyrinthulomycota. Department of Plant Biology, University of Georgia.
- Ralph, Peter J.; Short, Frederick T. (2002). "Impact of the wasting disease pathogen, Labyrinthula zosterae, on the photobiology of Zostera marina". Marine Ecology Progress Series. 226: 265–271. doi:10.3354/meps226265.
- Regan, Casie. Vampire Scientists Study Sea Grass Slime Mold in Florida Bay. National Park Service.