scholarly journals Rapid Accumulation of Trihydroxy Oxylipins and Resistance to the Bean Rust Pathogen Uromyces fabae Following Wounding in Vicia faba

2006 ◽  
Vol 97 (5) ◽  
pp. 779-784 ◽  
Author(s):  
DALE R. WALTERS ◽  
TRACY COWLEY ◽  
HANS WEBER
Keyword(s):  
Vicia Faba ◽  
Bean Rust ◽  
Uromyces Fabae ◽  
Rust Pathogen ◽  
Rapid Accumulation

scholarly journals Trichothecium roseum Link ex Fr. on Uromyces fabae (Pers.) de Bary

2014 ◽  
Vol 12 (1) ◽  
pp. 127-129
Author(s):  
Marta Pruszyńska-Gondek
Keyword(s):  
Biological Control ◽  
Vicia Faba ◽  
Uromyces Fabae ◽  
Trichothecium Roseum

Mycelium of <i>Trichothecium roseum</i> Link ex Fr. was observed in Poland on the surface of separate soruses of <i>Uromyces fabae</i> (Pers.) de Bary on the leaves of <i>Vicia faba</i> L. and <i>V. faba</i> L. var. <i>minor</i>. The sourses of <i>Uromyces fabae</i> were covered by the, fruiting mycelium of <i>Trichothecium roseum</i>, which, probably, inhibited the development of its uredospores. Therefore, biological control of <i>U. fabae</i> with the use of <i>Trichothecium roseum</i> seems feasible.

The effect of rust on yield of faba bean cultivars and slow-rusting populations

1991 ◽  
Vol 71 (4) ◽  
pp. 967-972 ◽  
Author(s):  
K. Y. Rashid ◽  
C. C. Bernier
Keyword(s):  
Vicia Faba ◽  
Faba Bean ◽  
Yield Components ◽  
Field Studies ◽  
Bean Rust ◽  
Plant Seed ◽  
Susceptible Line ◽  
Slow Rusting ◽  
Healthy Control ◽  
Rust Severity

Field studies were conducted in 1983 and 1984 to assess the effect of rust (Uromyces viciae-fabae) on the yield components, pods per plant, seed per plant, seed per pod, total dry matter and harvest index of two faba bean (Vicia faba) cultivars and one susceptible line. The effect of rust was assessed also on the yield of 14 slow-rusting populations of V. faba. Rust epidemics were created by artificial inoculation and healthy control plots were protected from rust by fungicide applications. Rust severity remained low in the cultivars Diana and Herz Freya and seed yield of each cultivar was reduced by 3.8–6.6% and 6.3–9.7% in 1983 and 1984, respectively. Rust became severe in the susceptible line 2N40 and significantly reduced some yield components and thereby yields by 67.9% and 49.5% in 1983 and 1984, respectively. Rust caused yield losses of only 1–2% in the slow-rusting population 2N43, of 1–11% in slow-rusting populations from Erfordia and Diana, and of 6–43% in other slow-rusting populations, indicating that some slow-rusting populations are more tolerant to rust than others. Key words: Vicia faba, Uromyces viciae-fabae, faba bean, rust, yield components, slow-rusting, tolerance

scholarly journals Differential Regulation of Gene Expression in the Obligate Biotrophic Interaction of Uromyces fabae with Its Host Vicia faba

2001 ◽  
Vol 14 (11) ◽  
pp. 1319-1326 ◽  
Author(s):  
Stefan G. R. Wirsel ◽  
Ralf T. Voegele ◽  
Kurt W. Mendgen
Keyword(s):  
Amino Acid ◽  
Vicia Faba ◽  
Developmental Stages ◽  
Rust Fungus ◽  
Regulation Of Gene Expression ◽  
Sugar Uptake ◽  
Amino Acid Transporters ◽  
Plasma Membrane Atpase ◽  
Uromyces Fabae ◽  
Expression Of Genes

Classical analysis of obligate biotrophic fungi revealed changes of enzyme activities or the concentration of metabolites in infected areas. However, due to the intricate integration of host and parasite metabolism, it was not possible to delineate the individual contributions of the two organisms. Here, we used reverse-transcription-polymerase chain reaction to monitor expression of genes from the rust fungus Uromyces fabae and its host Vicia faba. We focused on genes relevant for amino acid and sugar uptake and metabolism in both organisms. In the fungus, mRNA for plasma membrane ATPase was detected in spores and all infection structures. Two genes for fungal amino acid transporters showed dissimilar regulation. Transcripts for one were detected during all developmental stages, whereas those of the other appeared to be under developmental control. The latter result was also obtained for the so far only hexose transporter known from U. fabae and for one gene of the thiamine biosynthesis pathway. In the host plant, transcripts for two ATPases analyzed generally declined upon infection. Sucrose synthase expression increased in leaves, but decreased in roots. Transcript levels of glucose and sucrose transporter genes appeared unchanged. Markers for amino acid metabolism did not show a uniform trend: transcripts for asparagine synthetase increased, whereas those for two amino acid transporters either decreased or increased. Our analyses revealed that not only expression of genes in the immediate vicinity of the primary infection site is altered, but infection also influences transcription of certain genes in remote organs, like stems and roots. This demonstrates alterations in the source-sink relationships.

Effects of environment on spore germination and infection by broad bean rust (Uromyces viciae-fabae)

1997 ◽  
Vol 128 (1) ◽  
pp. 73-78 ◽  
Author(s):  
M. E. JOSEPH ◽  
T. F. HERING
Keyword(s):  
Vicia Faba ◽  
Spore Germination ◽  
Broad Bean ◽  
Infection Process ◽  
Leaf Wetness ◽  
Artificial Light ◽  
Light Sources ◽  
Bean Rust ◽  
Light Intensities

Urediospores of U. viciae-fabae (broad bean rust) germinated well in the range 5–26 °C, with fastest germination at 20 °C. Exposure to 30 °C gave poor germination and damaged the spores. Infection of Vicia faba leaves depended on a moisture film. At 20 °C some infection occurred with only 4 h leaf wetness, but longer wet periods up to 24 h gave increased infection. At lower temperatures, the infection process was slower and final pustule numbers were smaller. Spore germination was delayed by daylight and by all artificial light sources that contained far-red (700–800 nm) wavelengths. The delay was increased at higher light intensities. When spores were subjected to alternating periods of light and darkness, it was found that 40 min of darkness was sufficient for the irreversible induction of germination at 20 °C.

scholarly journals Fine mapping of Ur-3, a historically important rust resistance locus in common bean

2016 ◽  
Author(s):  
O.P. Hurtado-Gonzales ◽  
G. Valentini ◽  
T.A.S Gilio ◽  
A.M. Martins ◽  
Q. Song ◽  
...  
Keyword(s):  
Common Bean ◽  
Resistance Genes ◽  
Fine Mapping ◽  
Rust Resistance ◽  
Bulked Segregant Analysis ◽  
Snp Markers ◽  
Resistance Locus ◽  
Bean Rust ◽  
Rust Pathogen ◽  
Rust Resistance Genes

AbstractBean rust is a devastating disease of common bean in the Americas and Africa. The historically important Ur-3 gene confers resistance to many races of the highly variable bean rust pathogen that overcome all known rust resistance genes. Existing molecular markers tagging Ur-3 for use in marker assisted selection produce false results. We described here the fine mapping of Ur-3 for the development of highly accurate markers linked to this gene. An F2 population from Pinto 114 × Aurora was evaluated for its reaction to four different races of the bean rust pathogen. A bulked segregant analysis using the SNP chip BARCBEAN6K_3 positioned the approximate location of the Ur-3 locus to the lower arm of chromosome Pv11. Specific SSR and SNP markers and haplotype analysis of 18 sequenced bean lines led to position the Ur-3 locus to a 46.5 Kb genomic region. We discovered a KASP marker, SS68 that was tightly linked to the Ur-3 locus. Validation of SS68 on a panel of 130 diverse common bean lines and varieties containing all known rust resistance genes revealed that it was highly accurate producing no false results. The SS68 marker will be of great value to pyramid Ur-3 with other rust resistance genes. It will also reduce significantly time and labor associated with the current phenotypic detection of Ur-3. This is the first utilization of fine mapping to discover markers linked to a rust resistance in common bean.

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