Difference between revisions of "AY Honors/Fungi/Rust infection"

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noob noob dfo===Appresorium Formation===
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:''This article is about the fungus. For the corrosion process, see [[rust]].''
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{{Taxobox
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| color = lightblue
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| name = Rusts
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| image = Bruine roest op tarwe (Puccinia recondita f.sp. tritici on Triticum aestivum).jpg
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| image_width = 330px
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| image_caption = Puccinia recondita f.sp. tritici on wheat leaf
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| regnum = [[Fungus|Fungi]]
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| divisio = [[Basidiomycota]]
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| classis = [[Urediniomycetes]]
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| ordo = '''Uredinales'''
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| subdivision_ranks = Families
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| subdivision =
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[[Pucciniaceae]]<br/>
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[[Melampsoraceae]]<br/>
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[[Coleosporiaceae]]<br/>
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[[Cronartiaceae]]<br/>
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[[Phragmidiaceae]]<br/>
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[[Pucciniastraceae]]
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}}
  
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The stomata is the site of [[appresorium]] formation, a structure that functions to both firmly anchor the fungus and aid in penetration.<ref>Deising, H.B., S. Werner, and M. Wernitz, The role of fungal appressoria in plant infection. Microbes Infect, 2000. 2(13): p. 1631-41.</ref> In the rust fungi appresorial formation is controlled by a process of [[thigmodifferentiation]]. Appresoria are formed when the germ tube detects ridges that match the dimefhghnsions of the stomatal lips of its [[Host (biology)|host]] species.
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'''Rusts''' are [[fungi]] of the order '''Uredinales'''. Many of these species are plant [DERHEXER GO AWAY OMG
  
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It has been proposed that this process is mediated by a mechanosensitive [[calcium]] [[ion]] channel that is located at the germ tube tip. This ion channel would transduce the stretching of the h[[cell mhembrane]] caused by changes in [[leaf]] [[topography]] into [[ion flux]]es that lead to changes in [[gene]] expression and appresorium formation.<ref>Zhou, X.L., et al., A mechanosensitive channel in whole cells and in membrane patches of the funhghdgus Uromyces. Science, 1991. 253(5026): p. 1415.</ref>. This theory is supported by experiments thdhat show that applying Ca<sup>2+</sup> externally to the germ tube causes [[differentiation]].
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==Gallery==
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<gallery>
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Image:Rust fungus (Uredinales) Pengo.jpg|Rust fungus on a leaf, under low magnification.
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Image:Rust fungus (Uredinales) pustules of urediniospores Pengo.jpg|Pustules of urediniospores.
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Image:Rustinfection.JPG| Cartoon representing the infection process of rust fungi
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</gallery>
  
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From tfhe fhfhl]] cells.
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==See also==
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*[[soybean rust]]
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hfh===hfh
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*[[Wheat leaf rust]]
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*[[Robigus]]
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Rust fungi are [[bifhfotroph]]s, meaning thffhey gain their nutrients from living cells. This requires fffffffffffffffffa spffffffffalised fentenshonff of the ffungi infto a lihfving plfant cell called a [[haustoria]]. This develops from a haustorial mother cell. The plant cell membrane invaginates around the main haustorial body and the space between the two fhfghfghfgggggfd [[sugar]] transporters and H<sup>+</sup>-ATPases for the [[active transport]] of nutrients from the plant cell.<ref>Voegele, R.T. and K. Mendgen, Rustgfd haustoria: nutrient fg
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*[[Groundsel]], a species susceptible to rust
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The rust hgImage:Rust fungus (Uredinales) Pengo.jpg|Rust fungus on a leaf, under low magnification.
 
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Image:t(fhdUredidgnales) pustules of urediniospores Pengo.jpg|Pustules of f:Rusthinfection.JPG| Cartoon representing the infection process of rust funghgi
 
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</gallery>f
 
  
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==See also==
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==External links==
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*[[shoybehfdfgan rust]]
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*[http://www.tauac.org/site/News2?page=NewsArticle&id=5719 A New Strain Of Wheat Could Avert Rust Fungus Catastrophe]
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*[[fdghFungus Catastrophe]
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* [http://botit.botany.wisc.edu/images/332/Basidiomycota/Teliomycetes/Uredinales/ Images of some rusts]
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* [http://fbotit.botany.fgwisc.edu/images/hfh/g[http://heliosg.bto.ed.ac.uk/bto/FungalBiology/hfgrust.htm#top ''Rust Fungi'' from Deacon, J: "Fungal Biology", Blackwell Publishing, 2005]
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*[http://helios.bto.ed.ac.uk/bto/FungalBiology/rust.htm#top ''Rust Fungi'' from Deacon, J: "Fungal Biology", Blackwell Publishing, 2005]
  
 
==References==
 
==References==

Revision as of 21:13, 16 October 2007

This article is about the fungus. For the corrosion process, see rust.

Template:Taxobox

Rusts are fungi of the order Uredinales. Many of these species are plant [DERHEXER GO AWAY OMG

Gallery

  • Rust fungus on a leaf, under low magnification.

  • Pustules of urediniospores.

  • Cartoon representing the infection process of rust fungi

See also

External links

References


da:Rustsvampe de:Rostpilze es:Urediniomycetes eo:Rustofungoj fr:Rouille (maladie) nl:Roesten

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