Changes in protein patterns of bean leaves after bean rust infection or application of elicitor

1983 ◽  
Vol 89 (6) ◽  
pp. 317-317 ◽  
Author(s):  
G. Wolf
Keyword(s):  
Bean Rust ◽  
Protein Patterns ◽  
Rust Infection ◽  
Bean Leaves

Interactions of the nonhost French bean plant (Phaseolus vulgaris) with parasitic and saprophytic fungi. IV. Effect of preinoculation with the bean rust fungus on growth of parasitic fungi nonpathogenic on beans

1991 ◽  
Vol 69 (8) ◽  
pp. 1642-1646 ◽  
Author(s):  
Myriam R. Fernandez ◽  
Michèle C. Heath
Keyword(s):  
Rust Fungus ◽  
Fungal Growth ◽  
Hyphal Growth ◽  
French Bean ◽  
Bean Rust ◽  
Protein Synthesis Inhibitors ◽  
Rust Infection ◽  
Parasitic Fungi ◽  
Wall Appositions ◽  
Bean Leaves

Bean leaves inoculated 24 h previously with the bean rust fungus were inoculated with spores of Cochliobolus heterostrophus, Stemphylium sarcinaeforme, Stemphylium botryosum, or Cladosporium fulvum. For all species except C. fulvum, hyphal growth resulting from stomatal penetrations was greater than that in leaves that were not rust-infected but did not continue for more than about 24 h. The incidence of direct penetrations for these three fungi also was increased by prior rust infection, and the incidence of epidermal wall appositions was reduced. Growth of C. fulvum in rust-infected leaves only exceeded that in control leaves when spores were injected into the intercellular spaces of the mesophyll tissue. Rust infection either had little effect on the incidence of cell death, normally induced by all of the tested fungi except C. fulvum, or it enhanced this response in association with greater fungal growth. From this and previous studies, it seems that successful rust infection increases the growth of a wider array of fungi nonparasitic to beans than treatments with growth regulators or intercellular washing fluids from rusted tissue. Its effect is most closely mimicked by preinoculation treatments with heat or protein synthesis inhibitors, but it does not induce indiscriminate susceptibility. Its effect may, in part, be due to the suppression of defenses involving wall modifications. Key words: Uromyces appendiculatus, induced susceptibility, nonhost resistance.

Heat sensitivity of mycelium and haustoria in bean leaves infected with bean rust

1981 ◽  
Vol 73 (2) ◽  
pp. 121-125 ◽  
Author(s):  
Gandolfina Farina ◽  
Nicoletta Barbieri ◽  
Maria Bassi ◽  
E. Betto
Keyword(s):  
Heat Sensitivity ◽  
Bean Rust ◽  
Bean Leaves

Monogenic and epistatic resistance to bean rust infection in common bean

1995 ◽  
Vol 47 (3) ◽  
pp. 173-184 ◽  
Author(s):  
R.J. Sayler ◽  
J.D. Ewing ◽  
P.E. McClean
Keyword(s):  
Common Bean ◽  
Bean Rust ◽  
Rust Infection

scholarly journals Overwinter Survival of Bean Rust Urediniospores in North Dakota

Plant Disease ◽  
2001 ◽  
Vol 85 (2) ◽  
pp. 226-227 ◽  
Author(s):  
P. L. Gross ◽  
J. R. Venette
Keyword(s):  
Phaseolus Vulgaris ◽  
North Dakota ◽  
Uromyces Appendiculatus ◽  
Bean Rust ◽  
Dry Bean ◽  
Overwinter Survival ◽  
Initial Inoculum ◽  
Over Time ◽  
Bean Leaves

Bean rust (Uromyces appendiculatus) reached epidemic proportions in North Dakota and Minnesota from 1993 to 1996. Although U. appendiculatus is a macrocyclic autoecious rust, neither pycnia nor aecia have been observed in commercial dry bean (Phaseolus vulgaris) in North Dakota fields. The source of initial inoculum is not clearly understood. This study determined the potential for urediniospore survival overwinter. Uredia-bearing bean leaves from artificially inoculated greenhouse-grown plants were kept outside near a field from November to May from 1990 to 1996. Based on bioassays urediniospores survived overwinter, but viability declined over time. Overwinter survival indicates urediniospores may function as initial inoculum.

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