Sagenista
| Sagenista | |
|---|---|
| |
| Alabyrinthulid | |
Scientific classification
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Bigyra |
| Subphylum: | Sagenista Cavalier- Smith, 1995[1]stat. n. 2006 |
| Groups | |
| |
Sagenistais a group ofheterokontscontaining thelabyrinthulidsand Eogyrea, a class of yet unculturedprotists.Originally, it contained theLabyrinthulidsandbicosoecids.Thebicosoecidshave been removed, and Eogyrea were added, in order to make the group monophyletic.[2][3][4][5]
Some have a specialorganellecalled abothrosome(orsagenogenetosome). 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 ofOmega-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.PMID16557340.S2CID29567514.
- ^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 2024-09-12).
{{cite journal}}:CS1 maint: DOI inactive as of September 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.PMID23219323.
- ^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.JSTOR3759933.
- ^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.