Results 111 to 120 of about 258 (148)

The production of phytoalexins by oat in response to crown rust, Puccinia coronata f. sp. avenae

Physiological Plant Pathology, 1981
The antifungal compounds accumulated only in the incompatible host-parasite combinations; the time of rapid accumulation coincided with the time of the retardation of the growth of infection hyphae. Three major compounds were isolated. They are highly hydrophilic nitrogen-containing phenolics.
S. Mayama, T. Tani, Y. Matsuura, T. Ueno, H. Fukami   +4 more
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Interactions Between Avena and Puccinia Species. II. The Pathogens: Puccinia coronata CDA and P. graminis Pers. F. Sp. avenae Eriks. & Henn.

The Journal of Applied Ecology, 1983
Evaluation de l'abondance, de la diversite et du pouvoir pathogene des populations de P.c. et de P.g.f.a. en Nouvelle Galles du Sud pour 3 especes sauvages d'avoine (A. barbata, A. fatua, A. ludoviciana)
J. D. Oates, J. J. Burdon, J. B. Brouwer
openaire   +1 more source

Reactions of eastern Canada oat genotypes to Puccinia coronata f. sp. avenae

Canadian Journal of Plant Science, 2020
Crown rust, caused by Puccinia coronata f. sp. avenae (Pca), is the most important disease and yield limiting factor of oat production in eastern Canada. In this study 101 oat genotypes composed of 51 cultivars and 50 breeding lines from eight oat breeding programs across Canada were evaluated for seedling reactions to six common Pca races, as well as
Xue, Allen, Menzies, James G., Chen, Yuanhong, Yan, Weikai, Ma, Baoluo, Guo, Wei, Gao, Fen, Liu, Jinghui, Ren, Changzhong   +8 more
openaire   +1 more source

Incidence and virulence ofPuccinia coronataf. sp.avenaein Canada in 1993

Canadian Journal of Plant Pathology, 1994
En 1993, des taux d'atteinte de la rouille couronnee (causee par Puccinia coronata f. sp. avenae) variant de l'etat de traces a 10 % ont ete observes chez de l'avoine receptive (Avena sativa) et de la folle avoine (A. fatua) au Manitoba, a la mi-juillet.
J. Chong, W.L. Seaman
openaire   +1 more source

Surface structure of the urediniospores of Puccinia coronata f. sp. avenae

Canadian Journal of Botany, 1970
The surface structure of the echinulate urediniospores of Puccinia coronata f. sp. avenae race 320 was examined with the light microscope and the electron microscope. The scanning electron microscope revealed a network of ridges encircling the spines. On many urediniospores, small ring-like ridges, about 1 μ across, closely encircled the bases of the ...
openaire   +1 more source

БИОЛОГИЯ РАЗВИТИЯ ВОЗБУДИТЕЛЯ КОРОНЧАТОЙ РЖАВЧИНЫ (PUCCINIA CORONATA CDA. F. SP. AVENAE FRASER ET LED.)

2023
Puccinia coronata f. sp. avenae вызывает заболевание корончатой ржавчиной у овса. Значительные потери урожая, вызванные этим патогеном, представляют собой одну из самых разрушительных угроз для сельскохозяйственных культур во всем мире. Возбудитель корончатой ржавчины – гриб-базидиомицет с облигатным биотрофным образом жизни.
openaire   +1 more source

Incidence and virulence ofPuccinia coronataf. sp. avenae in Canada from 1996 to 1998

Canadian Journal of Plant Pathology, 2000
Crown rust (Puccinia coronata f. sp. avenae) of oat (Avena sativa) was severe in Manitoba in 1996 and 1998 but was relatively mild in 1997. Heavy crown rust infections were also commonly found on wild oat (Avena fatua) in eastern Saskatchewan in 1996 and 1998.
openaire   +1 more source

An improved method to quantifyPuccinia coronataf. sp.avenaeDNA in the hostAvena sativa

Canadian Journal of Plant Pathology, 2010
Abstract Identification and genetic mapping of loci conferring resistance to polycyclic pathogens such as the rust fungi depends on accurate measurement of disease resistance. We converted an absolute quantification assay of Puccinia coronata DNA to a relative assay by adding a TaqMan® primers/probe set specific to the oat β-actin gene to simplify and ...
M. Acevedo, E. W. Jackson, A. Sturbaum, H. W. Ohm, J. M. Bonman   +4 more
openaire   +1 more source

Impact of Crown Rust (Puccinia coronata f. sp. avenae) on Competitive Interactions between Wild Oats (Avena fatua) and Stipa (Nassella pulchra)

Biological Control, 2001
Abstract Crown rust of oats ( Puccinia coronata f. sp. avenae ) was investigated as a biocontrol agent for wild oats ( Avena fatua ) on San Clemente Island, California. Successful restoration of the native habitats of this island will involve the reduction of wild oats and revegetation with native grasses such as stipa ( Nassella pulchra ...
Laura D Carsten, Bruce Maxwell, Mareike R Johnston, David C Sands   +3 more
openaire   +1 more source

THE DISTRIBUTION AND FREQUENCY OF OCCURRENCE OF PHYSIOLOGIC RACES OF PUCCINIA CORONATA CORDA F. SP. AVENAE ERIKSS., IN CANADA, 1952 TO 1961

Canadian Journal of Botany, 1963
From 1952 to 1956 the races of crown rust, Puccinia coronata Corda f. sp. avenae Erikss., that predominated in Eastern Canada were 201, 202, 203, 209, 239, and 240. Races 201, 202, and 204 occurred most frequently in Western Canada. These races cannot attack the differential host variety Victoria, from which the currently grown commercial varieties ...
G. Fleischmann, D. J. Samborski, B. Peturson   +2 more
openaire   +1 more source