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
Genetic variability in pectic enzymes of Rhizoctonia solani isolates causing bare-patch disease of cereals
H.A. Yang,[No Value] Jumei Zhou,Krishnapillai Sivasithamparam,I. C. Tommerup,J. E. Barton,Philip A. O’Brien +5 more
TL;DR: The variation of zymograms among homokaryotic strains suggests that each field isolate of R. solani contains two types of nuclei, although cells of vegetative hyphae are multinucleate.
Journal ArticleDOI
Use of RAPD, enzyme activity staining, and colony size to differentiate phytopathogenic Fuzarium Oxysporum isolates from Iran
TL;DR: Cluster analysis of the data from the DNA amplification by Random Amplified Polymorphic DNA (RAPD), differentiated HV from WV isolates, confirming the classification of these eight isolates based on pathogenicity test, colony size, and enzyme activity staining into two groups (HV and WV).
Journal ArticleDOI
Current Status of Cereal Root Diseases in Western Australia Under Intensive Cereal Production and Their Comparison with the Historical Survey Conducted During 1976–1982
Ravjit Khangura,Gordon C. MacNish,William J. MacLeod,Vivien A. Vanstone,Colin Hanbury,Robert Loughman,Jane E. Speijers +6 more
TL;DR: The more recent root disease survey identified that the fungal diseases rhizoctonia root rot and fusarium crown rot and the root lesion nematode were the most serious impediments to intensive cereal production, particularly in the southern region of WA.
Journal ArticleDOI
Pectic enzyme patterns of Ceratobasidium and Rhizoctonia spp. associated with sharp eyespot-like lesions on cereals in South Australia
TL;DR: Pathogenicity testing showed that isolates of Ceratobasidium cornigerum and T. cucumeris, particularly AG-4 the stem strain, produced sharp eyespot-like lesions on cereal stems but they were not as pathogenic as authentic isolate of R. cerealis from Europe.
Dissertation
Production of laccase by the phytopathogenic fungus Rhizoctonia solani
TL;DR: This thesis is an investigation into the production of laccases by the phytopathogenic soil fungus Rhizoctonia solani, and the effects of the inhibitory compounds EDTA and SDS on laccase activity was determined.
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
Journal ArticleDOI
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.