Journal ArticleDOI
Pectic zymograms and taxonomy and pathogenicity of the Ceratobasidiaceae
TLDR
The pectic enzymes of 140 isolates of Rhizoctonia-1ike fungi from the Western Australian grainbelt were examined by electrophoresis and found to fall into 11 distinct zymogram groups (ZG).Abstract:
The pectic enzymes of 140 isolates of Rhizoctonia-1ike fungi from the Western Australian grainbelt were examined by electrophoresis and found to fall into 11 distinct zymogram groups (ZG). Isolates within a ZG had a similar cultural and morphological appearance and were either all multinucleate or all binucleate. Some isolates from most ZGs sporulated when transferred from potato-dextrose-marmite agar to water agar. Isolates from within a ZG had the same teleomorph. Pathogenicity of the isolates was tested against wheat and lupins. All isolates from within a ZG were consistent in the type of lesions they produced and in their virulence towards these hosts. Rhizoctonia patch disease of cereals and lupins appears to be caused by isolates from ZG 1 and ZG 2. Severe reddish-brown and brown hypocotyl rots of lupins were caused by ZG 3 and ZG 4 isolates respectively. Five Ceratobasidium groups (CZG), one Waitea group (WZG) and ZG 5 had weak to nil pathogenicity towards wheat and lupins.read more
Citations
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Journal ArticleDOI
Characterization and Pathogenicity of Rhizoctonia Species on Canola.
TL;DR: ZG5 is most pathogenic to crucifers and is a mildly virulent pathogen of the leguminous crops but not of cereal crops tested, which is the first report of hypocotyl rot and pathogenicity of ZG5 on canola in Australia.
Journal ArticleDOI
An integrated approach to Rhizoctonia taxonomy: cultural, biochemical and numerical techniques
TL;DR: Comparisons of Rhizoctonia isolates support recognizing AG4 as a distinct species, Thanatephorus praticola , but do not support recognizing T. sasakii or Corticium microsclerotium as taxa distinct from T. cucumeris.
Journal ArticleDOI
Ceratorhiza pernacatena and Epulorhiza calendulina spp.nov.: mycorrhizal fungi of terrestrial orchids
Carla D. Zelmer,R. S. Currah +1 more
TL;DR: Two new species of fungi mycorrhizal with terrestrial orchids native to the Canadian prairies are described and illustrated.
Journal ArticleDOI
Pectic enzyme patterns of Rhizoctonia solani isolates from agricultural soils in South Australia
TL;DR: Pectic zymogram patterns are proposed as a fast and reliable method of determining anastomosis group in Rhizoctonia solani isolates subjected to electrophoresis in pectin acrylamide gels.
Journal ArticleDOI
Relationship of microscopic and macroscopic vegetative reactions in Rhizoctonia solani and the occurrence of vegetatively compatible populations (VCPs) in AG-8
TL;DR: It is proposed that a group of field isolates of R. solani that give a C3 anastomosis reaction be designated a ‘vegetatively compatible population’ (VCP) because macroscopic vegetative reactions can be used to predict the microscopic (anastOMosis) reaction.
References
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Journal ArticleDOI
The genetics and pathology of rhizoctonia solani
TL;DR: The objective of this paper is to review the genetical and pathological research on Rhizoctonia solani Kuhn from 1965 to the present and to discuss each anastomosis group separately.
Journal ArticleDOI
A selective medium for the quantitative determination of Rhizoctonia solani in soil.
W. h. Ko,Frances K. Hora +1 more
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Safranin O as a rapid nuclear stain for fungi.
TL;DR: Maximum germination of both basidiospores and oidia was obtained on agar media containing cornmeal and malt extract with malt-extract-liquid medium, apparently providing a stimulatory substance in sufficient quantity to yield maximum percent germination.