The Formation of Elongating Secondary Hyphae of Erysiphe graminis and the Segregation of Ml Genes in Barley

Yang, S. L.

doi:10.1094/phyto-62-1219

Cited by 6 publications

(3 citation statements)

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“…Thus colony establisliinent was arrested at a very early stage of development. This is also characteristic of many major-gene types of resistance (Masri & Eliingboe, 1966;McCoy & EUingboe, 1966;Stanbridge et al, 1971;Yang et al, 1972;Lin & Edwards,' 1974).' However, it is possible that degeneration of established colonies, subsequent to the 72-h incubation period, may have further contributed to reducing colony numbers in some varieties.…”

Section: Discussionmentioning

confidence: 99%

“…British Society for Plant Pathology (1966), McCoy & Eilingboe (1966), McKeen & Bhattacharya (1970), Mount & Slesinski (1971), Stanbridge et al (1971), Yang et al (1972), Lin & Edwards (1974), iBusknell & Bergquist (1975 and Johnson et al (1979) and, in wheat, by Masri & Eilingboe (1966) and Hyde & CoUioun (1975). In all these instances, the resistance examined was of the 'major-gene' type, being extreme in its expression and under relatively simple genetic control.…”

Section: Introductionmentioning

confidence: 99%

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The expression of partial resistance to Erysiphe graminis in spring barley

Asher

Thomas

1983

Plant Pathology

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The development of powdery mildew on five barley varieties selected for partial resistance in the field and lacking identifiable, effective race‐specific resistance factors was examined. Inoculation tests demonstrated that a reduction in the number of colonies was a major component of this resistance. Microscopic examination of segments from the fourth and fifth leaf revealed several stages at which colony development was arrested. The failure of individual penetrations to establish compatible colony growth was classified as being due either to hypersensitive or to non‐hypersensitive resistance in host epidermal cells. Varying proportions of these two types of resistance mechanism were evident in all varieties examined, including the susceptible controls. In four resistant varieties, one or other mechanism predominated. The possibility of enhancing partial resistance by combining sources in which different mechanisms operate is discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The expression of partial resistance to Erysiphe graminis in spring barley

Asher

Thomas

1983

Plant Pathology

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“…A series of paired near-isogenic lines of barley have been developed (18) to provide cultivars containing one of several dominant genes specifying resistance to the powdery mildew fungus or the corresponding recessive alleles in a common genetic background. Using these near-isogenic cultivars it has been established that the fungal development as determined by individual resistance genes can differ considerably (6,11,17,23). For example, the Algerian gene at the Mla locus conditions an early and highly effective resistance response with very little development of the pathogen occurring beyond I day after inoculation (2,13), whereas the Kwan (Mlk) and Psaknon (Mlp) genes condition a weaker response (11,17,23), and some development of the pathogen continues for several days.…”

Section: Introductionmentioning

confidence: 99%

Patterns of post-infectional protein synthesis in barley carrying different genes for resistance to the powdery mildew fungus

1985

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Pairs of susceptible and resistant, near-isogenic cultivars ofHordeum vulgare which differ for the Mla, Mlk and Mlp genes for resistance toErysiphe graminis f. sp.hordei were inoculated with race 3 of this pathogen and patterns of protein synthesis associated with primary infection mapped using pulse-labelling with L-[(35)S]methionine and 2-dimensional electrophoresis. Extraction of proteins with buffer containing detergent revealed the enhanced synthesis of 5 and 8 polypeptides at 25 and 30 h respectively after inoculation of barley carrying the Mla gene (cvMla). The enhanced synthesis of these same polypeptides together with 11 additional polypeptides was observed at 48 h and 72 h after inoculation of barley carrying either the Mlp (cvMlp) or Mlk (cvMlk) genes. The labelling of several major constitutive polypeptides was suppressed in cvMla at 24 h after inoculation; the labelling of six of these polypeptides was also suppressed in both cvMlp and cvMlk but not until 48 and 72 h after inoculation. These results indicate that changes occur in the synthesis of some common polypeptides following infection of cultivars carrying different resistance genes but the timing and extent of these changes varies with the resistance gene in the host.

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The Genetic Bases of Relationships between Microbial Parasites and their Hosts

Crute¹

1985

Mechanisms of Resistance to Plant Diseases

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The Formation of Elongating Secondary Hyphae of Erysiphe graminis and the Segregation of Ml Genes in Barley

Cited by 6 publications

References 0 publications

The expression of partial resistance to Erysiphe graminis in spring barley

The expression of partial resistance to Erysiphe graminis in spring barley

Patterns of post-infectional protein synthesis in barley carrying different genes for resistance to the powdery mildew fungus

The Genetic Bases of Relationships between Microbial Parasites and their Hosts

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