Journal ArticleDOI
The genetics and pathology of rhizoctonia solani
TLDR
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.Abstract:
The objective of this paper is to review the genetical and pathological research on Rhizoctonia solani Kuhn from 1965 to the present. In 1965, a symposium, Rhizoctonia solani: Biology and Pathology, was held at Miami, Florida. At this meeting the characteristics of the imperfect stage were defined (60) and the perfect stage accepted as Thanatephorus cucumeris (Frank) Donk (79). It was recognized, however, that T. cucumeris was a "collective species" and that its nomenclature was not expected to remain stable (79). The past 15 years have been a productive period of research on the pathogen and on the diseases it causes. A number of disease resistant cultivars have been reported and disease control measures have been recom mended. The principle most helpful to plant pathologists during this period has been the anastomosis group (AG) concept. This scheme was first suggested in Germany by Schultz in 1937 (74) and later developed by Richter & Schneider in 1953 (66); in Japan by Watanabe & Matsuda in 1966 (82); and in the United States by Parmeter et al in 1969 (59). According to this scheme fusion occurs only between isolates of the same AG. Parmeter et al proposed four AGs (59); Kuninaga et al (49) have expanded the concept to include six AGs and Ogoshi (55) has proposed two subgroups within both AG 1 and AG 2. I will discuss each anastomosis group separately in this paper.read more
Citations
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Journal ArticleDOI
Transgenic Plants with Enhanced Resistance to the Fungal Pathogen Rhizoctonia solani
Karen Brogue,Ilan Chet,Mark Holliday,Robert F. Cressman,Phyllis Biddle,Susan Knowlton,C. Jeffry Mauvais,Richard Broglie +7 more
TL;DR: Transgenic tobacco seedlings constitutively expressing a bean chitinase gene under control of the cauliflower mosaic virus 35S promoter showed an increased ability to survive in soil infested with the fungal pathogen Rhizoctonia solani and delayed development of disease symptoms.
Journal ArticleDOI
Volatiles of bacterial antagonists inhibit mycelial growth of the plant pathogen Rhizoctonia solani
TL;DR: It is demonstrated that small organic volatile compounds emitted from bacterial antagonists negatively influence the mycelial growth of the soil-borne phytopathogenic fungus Rhizoctonia solani Kühn.
Book ChapterDOI
Grouping in Rhizoctonia Solani by Hyphal Anastomosis Reaction
TL;DR: Grouping of strains of Rhizoctonia solani Kuhn (teleomorph: Thanatephorus cucumeris)] based on hyphal anastomosis reactions has been described as the principle most helpful to plant pathologists in studies of R. solani.
Journal ArticleDOI
Characterization of AG-13, a Newly Reported Anastomosis Group of Rhizoctonia solani
TL;DR: Length and sequence of the internal transcribed spacer (ITS) regions of rDNA from isolates of AG-13 were unique among AGs of R. solani.
Journal ArticleDOI
Sequence variation of the rDNA ITS regions within and between anastomosis groups in Rhizoctonia solani
TL;DR: Results suggest that sequence analysis of ITS rDNA regions of R. solani may be a valuable tool for identifying AG subgroups of biological significance.
References
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Journal ArticleDOI
Control of rhizoctonia solani on cotton seedlings with Pseudomonas fluorescens and with an antibiotic produced by the bacterium.
TL;DR: The isolation and identification of a fluorescent diameter wells cut in PDA plates inoculated simultaneously on the pseudomonad antagonistic to R. solani and the identification of an antagonistic bacterium from antibiotic was crystallized from it after cooling.
Journal ArticleDOI
Genetics of Natural Populations. V. Relations between Mutation Rate and Accumulation of Lethals in Populations of Drosophila Pseudoobscura
TL;DR: The present article reports the results of a study of the identity of lethals found in natural populations as shown by their allelism; of the rate of elimination of lethal by selection; and of the rates of their de novo origin by mutation.
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Trichoderma hamatum effects on seed and seedling disease induced in radish and pea by Pythium spp. or Rhizoctonia solani.
Journal ArticleDOI
Compatibility reactions on solid medium and interstrain inhibition in Ustilago maydis.
TL;DR: Both plate mating and interstrain inhibition provide information on the development of the fungus in corn.