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Wednesday, July 29, 2020 | History

2 edition of study of resistance to Uromyces vignae, race 1 (Barcl.) in cultivars of Vigna unguiculata (L.) Walp. found in the catalog.

study of resistance to Uromyces vignae, race 1 (Barcl.) in cultivars of Vigna unguiculata (L.) Walp.

Douglas Edward Ryerson

study of resistance to Uromyces vignae, race 1 (Barcl.) in cultivars of Vigna unguiculata (L.) Walp.

by Douglas Edward Ryerson

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  • 16 Currently reading

Published .
Written in English


The Physical Object
Pagination119 leaves.
Number of Pages119
ID Numbers
Open LibraryOL17399944M
ISBN 100612353079

Various stages in hypersensitive cells death were recognized cytologically as a resistance response in this study. monokaryotic stage of the cowpea rust fungus (Uromyces vignae Barclay race 1). § Uromyces vignae: Auktor: Barclay Synonymer; Uromyces phaseoli var. vignae (Barclay) Arthur [1] Nigredo vignae (Barclay) Fromme [2] Uromyces vignae är en svampart [3] som beskrevs av Barclay Uromyces vignae ingår i släktet Uromyces och familjen Pucciniaceae.

The development of infection structures by the rust fungus Uromyces vignae was observed on oil-containing collodion membranes. About 40% of infection hyphae formed a haustorial mother cell, but this structure commonly senesced and died more rapidly than the infection hypha to which it was attached. Teliospores of the cowpea rust fungus (Uromyces vignae Barclay) race 1 (CPR-1) were produced on primary leaves of a susceptible cv. and stored on dried leaves at room temperature. Sterilized telio-spores (Heath, ) were inoculated on 2 % water agar in Petri dishes and incubated in a growth chamber at 22 'C. At about 48 h after inoculation.

Background. Non-host resistance (NHR) is resistance exhibited by an entire plant species to all genetic variants of a non-adapted pathogen species (or bacterial pathovar [pv] or fungal forma specialis [f. sp.]) and represents the most robust and durable form of plant resistance in nature [].The presence of this defense system explains why plants are immune to the vast majority of potential. 1. Bot. The infection process of basidiospores of the cowpea rust fungus (Uromyces vignae) was studied on living host (Vigna sinensis) and nonhost (Vida faba) leaves using light microscopy with differential interference contrast optics. During the first 8 h, fungal development was similar on host and on nonhost leaves.


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Study of resistance to Uromyces vignae, race 1 (Barcl.) in cultivars of Vigna unguiculata (L.) Walp by Douglas Edward Ryerson Download PDF EPUB FB2

Reactions of 93 field pea varieties to three isolates of Uromyces fabae (Pers.) de Bary (Uf-1, Uf-2, and Uf-3) were measured as leaf area with symptoms (LAS) under controlled environmental icant differences (P Cited by:   1.

Introduction. Pea rust is a serious disease of worldwide distribution causing yield losses in pea (Pisum sativum L.).In years of epidemics, rust results in affected leaves drying up and detaching from the plant, so beans remain undeveloped and consequently yield losses can be more than 30% ().The pathogen develops in warm, humid weather and may cause significant damage when Cited by: 9.

BRIAN V. FORD-LLOYD, SUSAN J. ARMSTRONG, in Genetic Improvement of Vegetable Crops, Disease resistance. The three recognized species of leek rust (Puccinia allii, P.

mixta and Uromyces ambiguus) can cause serious damage to the leaves of A. fistulosum. 18 The uredial lesions and the chlorotic spots which are formed on the leaves markedly reduce the market value.

A previous study had indicated that scavengers of reactive oxygen species (ROS) delayed cell death (the hypersensitive response (HR)) triggered in epidermal cells of intact, resistant, cowpea (Vigna unguiculata (L.) Walp) leaves by the monokaryotic stage of the cowpea rust fungus (Uromyces vignae Barclay race 1).This HR had been monitored by cell autofluorescence, which occurs after protoplast Cited by: Increasing leaf age was accompanied by increases in resistance in three incompatible cowpea cultivars inoculated with race 1 of Uromyces vignae and in three of four cultivars that had previously been considered susceptible to race N2.

Selected crosses between cultivars suggested that resistance to race 1 was controlled by the same genes in young and old leaves, and they indicated that age Cited by: Resistance to race 1 of the cowpea rust fungus (Uromyces vignae) in cowpea (Vigna unguiculata) plants results from a resistance gene-dependent cell death process (the hypersensitive response.

A Study of Resistance to Uromyces vignae, race 1 (Barcl.) in cultivars of Vigna unguiculaa (L.) Wa$. Douglas Edward Ryerson A thesis submitted in confornity with the requirements for the degree of Doctor of Philosophy Department of Botany in University of Toronto.

Selected elite cowpea lines with different levels of resistance to brown rust (Uromyces vignae) and false rust (Synchytrium dolichi) were used to study the relationship between false and brown rusts and grain g intensities of brown and false rust were obtained with different fungicide treatments in field experiments.

MC HeathGenetics and cytology of age-related resistance in North American cultivars of cowpea (Vigna unguiculataUromyces vignae Canadian. During the infection of cowpea (Vigna unguiculata) by the cowpea rust fungus (Uromyces vignae, race 1) the plant nucleus moves towards and away from the invading hypha and eventually moves close to the fungus in the susceptible cultivar while it remains away in two cultivars which subsequently respond by resistance gene‐dependent plant cell death (the hypersensitive response, HR).

Aqueous exudates from appressorium-bearing basidiospore germlings of race 1 of the cowpea rust fungus (Uromyces vignae) elicited necrosis of mesophyll cells when injected into leaves of the resistant cowpea cv. Dixie of necrosis were significantly higher than those elicited in a susceptible cultivar, California Blackeye, or in resistant cultivars, Queen Anne and Calico Crowder.

Genetic variation of 30 different Uromyces isolates collected on faba bean, lentil, common vetch, pea, chickpea, alfalfa, cowpea and lupin was studied. Random Amplified Polymorphic DNA markers were used showing clear differences among Uromyces es viciae‐fabae isolates clustered according to the host, with a clear cluster including all U.

viciae‐fabae ex Vicia faba isolates. An amplified fragement length polymorphism (AFLP) fragment, E-ACT/M-CAAtightly linked to the Striga gesnerioides race 1 (SG1) resistance gene Rsg in cowpea (Vigna unguiculata L.) was.

Inheritance of Resistance to Uromyces vignae in Cowpea and the Correlation Between Resistance and Sensitivity to a Cultivar-Specific Elicitor of Necrosis Chang-Y. Chen and Michele C. Heath Graduate student and professor, respectively, Department of Botany, University of Toronto, 25 Willcocks St., ON, Canada M5S 3B2.

The demand for cowpea (Vigna unguiculata L. Walp) is higher than supply in Ghana due to low yields caused by pathogenic diseases, predominantly rust disease. The use of rust resistant cultivars is the most effective method to control cowpea rust. Genetic variations among cowpea genotypes may be potential sources of rust resistance to control cowpea rust and increase cowpea.

General information about Uromyces vignae (UROMVI) EPPO Global Database. advanced search Login. Register. Toggle navigation. Home; Standards. PP1 - Efficacy Evaluation of Plant Protection Products; PP2 - Good Plant Protection Practice; PP3 - Environmental Risk Assessment of Plant Protection Products.

1: Nucleolus behavior: nucleolus or part of it is more persistent and is discarded after metaphase: 2: Transient intranuclear element at late interphase-prophase: present within nucleus opposite the extranuclear spindle pole body: 1.

Basidiospores of the cowpea rust fungus (Uromyces vignae, race 1) were produced by incubating teliospores on 2% water agar in the dark for ∼52 hr. Squares of agar bearing germinating teliospores were laid spore side down on the upper surface of leaves.

Plants were kept in a dark moist chamber overnight until further treatment. Uromyces vignae infection of cowpea was first recorded in India (Barclay ) and has since spread to many countries and areas throughout the world, including China, Japan and eastern Africa (Li.

The objective of this study was to assess Cellular and molecular analyses of coffee resistance to Hemileia vastatrix and nonhost resistance to Uromyces vignae in the resistance-donor Diana Fernandez, Identification and characterization of the Non-race specific Disease Resistance 1 (NDR1) orthologous protein in coffee, BMC.

Uromyces is a genus of rust fungi in the family genus was described by Franz Unger in his work Die Exantheme der Pflanzen.

Species. Species in the genus Uromyces include. Uromyces apiosporus; Uromyces appendiculatus; Uromyces beticola; Uromyces ciceris-arietini.Rust fungi (Basidiomycota; Order Uredinales) belong to the largest groups of fungi, with more than recognized species. Rust diseases have accompanied human history from the beginning of.The relationship between expression of resistance and host cell collapse was studied for the hypersensitive resistance of oat cultivar Shokan 1 infected by incompatible race of Puccinia.