The Relative Survival Ability of Pathogenic Types of Puccinia striiformis in Mixtures

Brown, J. F.; Sharp, E. L.

doi:10.1094/phyto-60-529

Cited by 26 publications

(12 citation statements)

References 4 publications

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“…T h e commonality of the basic requirements among biotrophs for specific changes in host tissues and physiology within the whole host or infection court is borne out by studies in mycopredisposition (Shaw, 1 9 9 4~) . Brown. & Sharp (1970) observed infection of wheat by an incompatible (avirulent) isolate of Puccinia striiformis when it was mixed with a compatible (virulent) isolate, concluding that the compatible isolate induced susceptibility in the host to the incompatible isolate.…”

Section: (3) the Biotroph Infection Court ( A ) Eflect On Host Physiomentioning

confidence: 99%

Trophism and the Ecology of Fungi Associated With Plants

Parbery

1996

Biological Reviews

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Section: (3) the Biotroph Infection Court ( A ) Eflect On Host Physiomentioning

confidence: 99%

Trophism and the Ecology of Fungi Associated With Plants

Parbery

1996

Biological Reviews

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“…White-spored forms of barley yellow rust have not previously been reported but spore colour mutants occur in several cereal rust fungi (Day, 1974) and a single gene change appears sufficient to produce such mutants (Newton et al, 1930). The origin of a white-spored mutant of wheat yellow rust has been noted independently on at least two occasions (Brown & Sharp, 1970;Johnson & Taylor, 1975). Thus deliberate screening of large populations of barley yellow rust, as carried out here, might be expected to reveal such mutants.…”

Section: Discussionmentioning

confidence: 98%

Attempted somatic hybridization of Puccinia striiformis f. sp. tritici and P. striiformis f. sp. hordei

Newton

Johnson²,

Caten

1986

Plant Pathology

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Attempts were made to produce somatic hybrids between isolates of Puccinia striiformis f. sp. tritici and f. sp. hordei. A mixed infection was produced on a common susceptible barley host, Fong Tien, using white‐spored isolates of P. striiformis f. sp. tritici and yellow‐spored isolates off. sp. hordei. Selection was made for non‐parental spore colour on selective wheat and barley hosts, and variants thus isolated were analysed for virulence markers, and for isozyme and double‐stranded RNA (dsRNA) markers, all of which clearly differentiated the parental isolates. Two white‐spored (non‐parental) isolates were found on the selective barley host which otherwise resembled the parental f. sp. hordei isolate in virulence, isozyme and dsRNA markers. The most likely explanation of the origin of these isolates is mutation to white spore colour in the f. sp. hordei isolate.

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“…The use of color, especially albinism (Brown and Sharp, 1970;Fry et al, 1984) or other morphological mutants also provide easily scored markers but they also raise similar questions about fitness costs associated with the marker. However, such markers may impart a fitness cost thus confounding the interpretation of results from experiments using them.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Field Experiments by Direct Allozyme Analysis of Late Blight Lesions Caused by Phytophthora infestans

Legard

Fry

1996

Mycologia

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.Abstract: The glucose-6-phosphate isomerase genotype of Phytophthora infestans was determined directly from individual foliar lesions or portions of lesions collected into microcentrifuge tubes in the field. Fresh or frozen samples were processed and subjected to standard starch gel electrophoresis. This method was used to determine the frequencies of two isolates of known but different glucose-6-phosphate isomerase genotype in a competitive aggressiveness experiment and to quantify the effect of contamination between field experiments. The direct analysis confirmed a large difference in tomato aggressiveness between the two isolates, but also suggested a difference in aggressiveness on potato between the two isolates. The direct assay enabled a single person to determine the allozyme genotype of the isolate causing each of 1,404 lesions during the 29 d of the field experiment.

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The Relative Survival Ability of Pathogenic Types of Puccinia striiformis in Mixtures

Cited by 26 publications

References 4 publications

Trophism and the Ecology of Fungi Associated With Plants

Trophism and the Ecology of Fungi Associated With Plants

Attempted somatic hybridization of Puccinia striiformis f. sp. tritici and P. striiformis f. sp. hordei

Evaluation of Field Experiments by Direct Allozyme Analysis of Late Blight Lesions Caused by Phytophthora infestans

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