Infection of Wheat and Oats by<i>Pyrenophora tritici-repentis</i>and Initial Characterization of Resistance

Lárez, Clemente; Hosford, R. M.; Freeman, Thomas

doi:10.1094/phyto-76-931

Cited by 42 publications

(50 citation statements)

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“…This is consistent with observations on appressorial attachment to the cuticle of the host in other interactions by means of an extracellular or mucilaginous sheath (Hau & Rush 1982, Wheeler & Gantz 1979. Larez et al (1986) also observed the presence of an extracellular sheath for P. tritici-repentis around the appressorium at the attachment site.…”

Section: Resultssupporting

confidence: 91%

“…Some fungal leaf pathogens use topographic features (thigmotropic response) to produce appressoria at specific sites on the leaf surface before penetration (Allen et al 1991a,b;Dale & Irwin 1991;Murray & Maxwell 1975;Rubiales & Niks 1992). Similar occurrences of topographical specificity have been claimed for P. tritici-repentis on wheat (Larez et al 1986, Loughman & Deverall 1986.…”

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confidence: 86%

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Penetration and infection of susceptible and resistant wheat cultivars by a necrosis toxin-producing isolate ofPyrenophora tritici-repentis

Dushnicky¹,

Ballance

Sumner

et al. 1996

Canadian Journal of Plant Pathology

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Section: Resultssupporting

confidence: 91%

mentioning

confidence: 86%

Penetration and infection of susceptible and resistant wheat cultivars by a necrosis toxin-producing isolate ofPyrenophora tritici-repentis

Dushnicky¹,

Ballance

Sumner

et al. 1996

Canadian Journal of Plant Pathology

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“…Although P . tritici-repentis infects more than 33 species of grasses (Hosford, 1982), high resistance to this pathogen have been found in barley, oats and rye (Wiese, 1977 ;Larez et al ., 1986) . Alam & Gustafson (1988) and Cox et al .…”

Section: Introductionmentioning

confidence: 99%

Evaluation for resistance to Pyrenophora tritici-repentis in Aegilops tauschii Coss. and synthetic hexaploid wheat amphiploids

Siedler

Obst

Hsam

et al. 1994

Genet Resour Crop Evol

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A total of 59 diploid Aegilops tauschii Coss . (syn . Aegilops squarrosa auct . non L .) and 39 synthetic hexaploid wheat accessions were evaluated for reaction to Pyrenophora tritici-repentis (Died .) Drechs . in a controlled environment, and classified using a disease rating system based on lesion type . 27 Ae . tauschii and 20 synthetic wheats were found to be resistant to tan spot disease . The overall mean disease ratings of Ae . tauschii and the synthetic wheat lines scored on a scale of 1 (resistant) to 5 (susceptible) were 1 .80 and 2 .38, respectively. Synthetic wheats generally showed a decrease in resistance, although several lines of synthetic wheat expressed a higher resistance than the diploid parents . Five synthetic wheat lines exhibited higher resistance than the standard resistant common wheat cultivar `Red Chief' .

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“…By analyzing the effects of inhibitors, they suggest that protein phosphorylation is involved in the mediation of two plant host signals (surface wax and ethylene) within the fungus as part of the infection process. The interaction P. tritici-repentis-wheat has been studied by several authors (Larez et al 1986;Freeman et al 1995;Loughman and Deverall 1986;Lamari et al 1995), but this interaction did not clarified respect the enzyme systems or the enzyme involved in the process of infection. They found that conidia produce apressoria and penetration pegs that entered epidermal cells and developed a vesicule.…”

Section: Resultsmentioning

confidence: 99%

Isozyme polymorphisms within Pyrenophora tritici-repentis population in Argentina

Moreno

Tacalitti

Castro

et al. 2007

World J Microbiol Biotechnol

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Tan spot caused by Pyrenophora tritici-repentis is an economically important disease of wheat (Triticum aestivum L.) in Argentina. The success of local breeding programs for resistance to the disease depends to a large extent on the genetic variation within the pathogen population. To assay this variability, 155 isolates of P. triticirepentis obtained from leaves of wheat and Festuca sp. of different localities were assayed and compared for isozyme polymorphisms. Isozyme analysis was performed with polyacrilamide gel electrophoresis in the systems estearase, phosphatase and peroxidase. Variation in the number and relative mobility of the bands by each system was detected in this collection of isolates. Intraspecific polymorphisms were identified in the three systems assayed. The cluster analysis based in bands patterns defined 86 electromorph types among the 155 isolates evaluated according with the Jaccard's coefficient (CCC = 095). The isozymes patterns were not correlated with the geographic and/or wheat cultivars origin of the P. tritici-repentis isolates.

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Infection of Wheat and Oats byPyrenophora tritici-repentisand Initial Characterization of Resistance

Cited by 42 publications

References 0 publications

Penetration and infection of susceptible and resistant wheat cultivars by a necrosis toxin-producing isolate ofPyrenophora tritici-repentis

Penetration and infection of susceptible and resistant wheat cultivars by a necrosis toxin-producing isolate ofPyrenophora tritici-repentis

Evaluation for resistance to Pyrenophora tritici-repentis in Aegilops tauschii Coss. and synthetic hexaploid wheat amphiploids

Isozyme polymorphisms within Pyrenophora tritici-repentis population in Argentina

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