Pseudofungi

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Pseudofungi
Scientific classification
Domain: Eukaryota
(unranked): SAR
Division: Heterokonta
(unranked): Pseudofungi
Cavalier- Smith, 1986[1]
Groups
Synonyms

Heterokontimycotina
M.W. Dick, 1976.

Pseudofungi is a heterokont grouping,[2][3] also known as the Heterokontimycotina.[4] It consists of the Oomycota and Hyphochytridiomycetes.[4] Although numerous biochemical, ultrastructural, and genetic traits clearly place them in the heterokonts, their growth form (featuring Hyphae) and mode of nutrition (osmotrophy) resembles the fungi (which are not closely related).[4]

Origen y ancestros[edit]

It is believed that pseudofungi descend from unicellular heterokont chromist algae which lost their plastids. If so there hasn´t been found evidence form these plastids, what has been proven is the existence of endosimbiotic red algae plastids.[5] Then an unicellular heterotroph proto-pseudofungi (probably a mushroom parasite) got its fungal genes through horizontal gene transfer, what would have led to the development of convergent fungal multicellularity.,[6] which explains why sometimes the wall is made by both chitin and cellulose. The group interrelashionships are as follow:

Pseudofungi 
 (unicelullar) 

 Developayella


 (multicellular) 
 

 Oomycetes



 Hyphochytridiomycetes




References[edit]

  1. ^ Prog. Phycol. Res. 4: 341, 1986.
  2. ^ Riisberg I, Orr RJ, Kluge R, et al. (May 2009). "Seven gene phylogeny of heterokonts". Protist 160 (2): 191–204. doi:10.1016/j.protis.2008.11.004. PMID 19213601. 
  3. ^ Cavalier-Smith T, Chao EE (April 2006). "Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista)". J. Mol. Evol. 62 (4): 388–420. doi:10.1007/s00239-004-0353-8. PMID 16557340. 
  4. ^ a b c Van der Auwera G, De Baere R, Van de Peer Y, De Rijk P, Van den Broeck I, De Wachter R (July 1995). "The phylogeny of the Hyphochytriomycota as deduced from ribosomal RNA sequences of Hyphochytrium catenoides". Mol. Biol. Evol. 12 (4): 671–8. PMID 7659021. 
  5. ^ Thomas Richards & Nicholas Talbot 2007, Plant Parasitic Oomycetes Such as Phytophthora Species Contain Genes Derived from Three Eukaryotic Lineages Plant Signal Behav. 2(2): 112–114.
  6. ^ Richards TA et al 2006 Sep Evolution of filamentous plant pathogens: gene exchange across eukaryotic kingdoms. Curr Biol. 19;16(18):1857-64.