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Effect of Host Plant Resistance on Haustorium Formation in Cereal Rust Fungi
Author(s) -
Martínez F.,
Sillero J. C.,
Rubiales D.
Publication year - 2004
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.2004.00854.x
Subject(s) - haustorium , biology , rust (programming language) , host (biology) , fungus , puccinia , wheat leaf rust , botany , hypersensitive response , plant disease resistance , virulence , gene , mildew , genetics , computer science , programming language
Haustoria of Puccinia triticina (wheat leaf rust fungus) and P. hordei (barley leaf rust fungus) were isolated from susceptible and partially resistant wheat lines, and susceptible, hypersensitive and partially resistant barley lines. Haustoria were counted and measured. The size of haustoria was similar in the partially resistant and susceptible genotypes but haustoria were smaller in the hypersensitive barley line L94+ Pa7 . The number of haustoria was reduced in both partially and hypersensitive lines when compared with susceptible ones. Therefore it seems that the reduction in the number of haustoria is a consequence of the resistance that can be attributable either to early abortion of infection units or reduced colony growth. The reduction of the number of haustoria was more pronounced in the adult plant stage.