scholarly journals FIELD RESISTANCE ACCESSIONS OF HEXAPLOID TRITICALE BY PUCCINIA STRIIFORMIS WEST IN THE SOUTH AREA PLANAR DAGESTAN

2016 ◽  
Author(s):  
K.U. Kurkiev ◽  
◽  
U.K. Kurkiev ◽  
S.K. Temirbekova ◽  
M.H. Gadzhimagomedova ◽  
...  
Keyword(s):  
Puccinia Striiformis ◽  
Field Resistance ◽  
The South ◽  
Hexaploid Triticale ◽  
Puccinia Striiformis West

scholarly journals Mutations in wheat leading  to enhanced resistance to the fungal pathogen of yellow rust

2002 ◽  
Vol 38 (SI 1 - 6th Conf EFPP 2002) ◽  
pp. S73-S75
Author(s):  
L.A. Boyd ◽  
J.A. Howie ◽  
T. Worland ◽  
R. Stratford ◽  
P.H. Smith
Keyword(s):  
Fungal Pathogen ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Field Resistance ◽  
Deletion Mutants ◽  
Molecular Characterisation ◽  
Wheat Line ◽  
Enhanced Resistance ◽  
Negative Effect ◽  
Mutant Lines

The isolation and study of plant resistance genes is revealing a story more complicated than the gene-for-gene hypothesis originally implied. The story of resistance is complicated even further by the discovery of genes that appear to have a negative effect on resistance. Early studies in the wheat line Hobbit ‘sib’ identified a number of chromosomes that reduced the level of field resistance to the fungal pathogen Puccinia striiformis f.sp. tritici, the causal agent of yellow rust on wheat. From a series of deletion mutants generated in Hobbit ‘sib’ a number of mutant lines were selected that gave enhanced resistance to yellow rust. The phenotypic, genetic and molecular characterisation of some of these mutants is presented.

A STUDY ON THE EPIDEMIOLOGY OF STRIPE RUST, PUCCINIA STRIIFORMIS WEST., IN CALIFORNIA

1967 ◽  
Vol 45 (3) ◽  
pp. 291-307 ◽  
Author(s):  
H. Tollenaar ◽  
Byron R. Houston
Keyword(s):  
Sierra Nevada ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Rapid Development ◽  
Maximum Temperature ◽  
Late Winter ◽  
Wheat Cultivars ◽  
Differential Set ◽  
Infection Types ◽  
Puccinia Striiformis West

Stripe rust of wheat, Puccinia striiformis f. sp. tritici, was found to oversummer in the Sierra Nevada at altitudes of 6000 ft or above on wild grasses belonging to Elymus spp., Hordeum spp., and Sitanion spp. The similarity of infection types of stripe rust isolates from various locations and hosts on a differential set of wheat cultivars suggests that only one race of P. striiformis f. sp. tritici occurs in California.Stripe rust on Poa spp. should be considered as P. striiformis f. sp. poae f. sp. nov. because of its entirely different host range and temperature requirements.A mean temperature of 22.3 °C or mean maximum temperature of 32.4 °C measured over a 10-day period is lethal to P. striiformis f. sp. tritici, thus accounting for the absence of this fungus during the summer in all regions of California but the Sierra Nevada and the coastal area. In late autumn, recurrence of the rust in the wheat-growing areas is initiated when east winds carry uredospores from the Sierra Nevada into the central part of the Sacramento – San Joaquin Valley, infecting volunteer wheat plants and early sown wheat. In late winter, a shortening of the latent period because of rising daily temperatures results in a rapid development of stripe rust at these infection sites and consequently in secondary spread of the rust to previously uninfected areas.

scholarly journals Plant Disease Resistance Inducing Activity of 7-Oxo- and 7-Hydroxysterols

1995 ◽  
Vol 50 (3-4) ◽  
pp. 257-262 ◽  
Author(s):  
H. Schabdach ◽  
S. Johne ◽  
U. Steiner ◽  
K. Seifert
Keyword(s):  
Plant Disease Resistance ◽  
Fungal Pathogens ◽  
Plant Disease ◽  
Puccinia Striiformis ◽  
Cochliobolus Sativus ◽  
Puccinia Hordei ◽  
Challenge Inoculation ◽  
Enhanced Resistance ◽  
Induce Resistance ◽  
Puccinia Striiformis West

The 7-oxosterols 1-2 and the 7-hydroxysterols 3-6 induce resistance toward the fungal pathogens Puccinia striiformis West, and Puccinia hordei Otth in barley and wheat. Primary leaves of the plants were sprayed with solutions of the compounds ( 10-4 mol/l in 1% aqu. ethanol) followed, 2 days later, by challenge inoculation with the fungal pathogens. The results indicate that 7α- and 7β-hydroxylated epimers of β-sitosterol and cholesterol show the highest value of induced resistance (39-49% reduction of infection sites). No enhanced resistance toward the fungi Erysiphe graminis DC f.sp. tricitic and hordei and Cochliobolus sativus Ito & Kuribayashi was observed.

Gene Expression in Wheat Induced by Inoculation with Puccinia striiformis West

2010 ◽  
Vol 29 (2) ◽  
pp. 458-465 ◽  
Author(s):  
Hong Zhang ◽  
Yingang Hu ◽  
Changyou Wang ◽  
Wanquan Ji
Keyword(s):  
Gene Expression ◽  
Puccinia Striiformis ◽  
Puccinia Striiformis West
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