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Model wheat genotypes as tools to uncover effective defense mechanisms against the hemibiotrophic fungus Bipolaris sorokiniana

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Ibeagha, Aloysius Ebelechukwu, Hückelhoven, Ralph, Schäfer, Patrick, Singh, Devendra Pal and Kogel, Karl-Heinz (2005) Model wheat genotypes as tools to uncover effective defense mechanisms against the hemibiotrophic fungus Bipolaris sorokiniana. Phytopathology, Volume 95 (Number 5). pp. 528-532. doi:10.1094/PHYTO-95-0528

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Official URL: http://dx.doi.org/10.1094/PHYTO-95-0528

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Abstract

We investigated the interaction of several differentially resistant wheatwith the hemibiotrophic phytopathogenic fungus Bipolaris sorokiniana (teleomorph Cochliobolus sativus). Wheat genotypes Yangmai, M 3 (W7976), Shanghai 4, and Chirya 7 showed higher levels of resistancewith cv. Sonalika, used as a susceptible control. In amicroscopic inspection, we found that fungal penetration intoepidermal layer failed mostly through a cell wall-associated defense. In cases where the fungus successfully overcame epidermal, its spread within the mesophyll tissue (necrotrophic phase) wasin the more resistant genotypes. Epidermal cell wall-associated, spreading as well as the extent of electrolyte leakage of infected, correlated well with field resistance. We propose that cellular hostsuch as formation of cell wall appositions as well as the degreeearly mesophyll spreading of fungal hyphae are indicative of thepotential of the respective host genotype and, therefore, could befor the characterization of new spot blotch resistance traits in cereals

Item Type: Journal Article
Divisions: Faculty of Science > Life Sciences (2010- )
Journal or Publication Title: Phytopathology
Publisher: American Phytopathological Society
ISSN: 0031-949X
Official Date: 2005
Dates:
DateEvent
2005UNSPECIFIED
Volume: Volume 95
Number: Number 5
Page Range: pp. 528-532
DOI: 10.1094/PHYTO-95-0528
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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