Pyrenophora tritici-repentis

Pyrenophora tritici-repentis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Dothideomycetes
Order: Pleosporales
Family: Pleosporaceae
Genus: Pyrenophora
Species:
P. tritici-repentis
Binomial name
Pyrenophora tritici-repentis
(Died.) Drechsler, (1923)
Synonyms

Drechslera tritici-repentis
Drechslera tritici-vulgaris
Helminthosporium gramineum f.sp. tritici-repentis
Helminthosporium tritici-repentis
Helminthosporium tritici-vulgaris
Pleospora culmorum
Pleospora sarcocystis
Pleospora trichostoma
Pyrenophora tritici-vulgaris
Pyrenophora sarcocystis
Pyrenophora trichostoma
Pyrenophora tritici-vulgaris
Sphaeria culmorum
Sphaeria sarcocystis
Sphaeria trichostoma

Pyrenophora tritici-repentis (teleomorph) and Drechslera tritici-repentis (anamorph) is a necrotrophic plant pathogen of fungal origin, phylum Ascomycota.[1] The pathogen causes a disease originally named yellow spot but now commonly called tan spot, yellow leaf spot, yellow leaf blotch or helminthosporiosis.[2][3] At least eight races of the pathogen are known to occur based on their virulence on a wheat differential set.[4]

The tan (yellow) spot fungus was first described by Nisikado in 1923 in Japan.[5] and was later identified in Europe, Australia and the US, in the mid 1900s.[6] The disease is one of the most important fungal disease on wheat and the fungal pathogen is found to infect in all parts of the world wherever wheat and other susceptible host crops are found.[4] P. tritici-repentis overwinters on stubble, and due to recent heavily no-till/residue retention cultural practices, increased incidence and yield loss of up to 49% has been witnessed if ideal conditions occur.[6] It forms characteristic, dark, oval-shaped spots of necrotic tissue surrounded by a yellow ring.[7] It is responsible for losses that account for up to 30% of the crop,[8] due to its effects reducing photosynthesis. Pathogenesis and toxicity in P. tritici-repentis is controlled by a single gene, transformations of this gene cause the pathogen to become benign when interacting with wheat.[9] This has major implications for those in agriculture seeking to combat the effects of this fungus.

  1. ^ Aboukhaddour, Reem; Turkington, T. Kelly; Strelkov, Stephen E. (April 2013). "Race structure of Pyrenophora tritici-repentis (tan spot of wheat) in Alberta, Canada". Canadian Journal of Plant Pathology. 35 (2): 256–268. Bibcode:2013CaJPP..35..256A. doi:10.1080/07060661.2013.782470. S2CID 85882209.
  2. ^ Prescott, J. M.; Burnett, P. A.; Saari, E. E.; Ranson, J.; Bowman, J.; De Milliano, W.; Singh, R. P.; Bekele, G. "Guide to Wheat Disease and Pests". wheat.pw.usda.gov. CIMMYT. Archived from the original on 20 March 2017. Retrieved 4 December 2014.
  3. ^ Duveiller, Etienne; Dubin, H.J.; Reeves, J.; McNab, A. (9–14 February 1997). Written at El Batan, Mexico. Helminthosporium Blights of Wheat: Spot Blotch and Tan Spot. CIMMYT. México, D.F., México. pp. viii+376. hdl:10883/1229. ISBN 970-648-001-3. OCLC 39500836. S2CID 82752566. CABI ISC# 20001003003.
  4. ^ a b Gamba, Fernanda M.; Strelkov, Stephen E.; Lamari, Lakhdar (October 2012). "Virulence of Pyrenophora tritici-repentis in the Southern Cone Region of South America". Canadian Journal of Plant Pathology. 34 (4): 545–550. Bibcode:2012CaJPP..34..545G. doi:10.1080/07060661.2012.695750. S2CID 84067227.
  5. ^ Nisikado, Yosikazu (1928). "Preliminary notes on yellow spot diseases of wheat caused by Helminthosporium tritici-vulgaris". Inst Agric Biol. 4: 103–109.
  6. ^ a b Faris, Justin D.; Liu, Zhaohui; Xu, Steven S. (25 July 2013). "Genetics of tan spot resistance in wheat". Theoretical and Applied Genetics. 126 (9): 2197–2217. doi:10.1007/s00122-013-2157-y. PMID 23884599. S2CID 1652404.
  7. ^ eumedia.es – Control de enfermedades en cereales de invierno. Web consulted 6 June 2008.
  8. ^ Manejo de las enfermedades del trigo. Pérez Fernández, Jesús & Corro Molas, Andrés. Web consulted 1 June 2008.
  9. ^ "A single gene encodes a selective toxin causal to the development of tan spot of wheat". Archived from the original on 9 November 2014.