Results 151 to 160 of about 13,162 (199)
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Parasitic differentiation of Claviceps purpurea
Transactions of the British Mycological Society, 1980The origin and progress of differentiation of sclerotial tissues of Claviceps purpurea within the parasitic sphacelium is described. Light microscopy revealed early differentiation adjacent to conidiogenous tissue in a superficial region 12 days after inoculation.
Barbara I. Shaw, P.G. Mantle
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Resistance to Claviceps purpurea in Spring and Durum Wheat
Nature, 1970THE ergot fungus, Claviceps purpurea (Fr.) Tul., is common on cereals and grasses throughout the temperate regions of North America1,2. It is often severe on rye (Secale cereale L.) and durum wheat (Triticum durum Desf.) and in recent years it has also been troublesome on Triticale (Triticum sp. × S.
R G, Platford, C C, Bernier
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Delimitation of cryptic species inside Claviceps purpurea
Fungal Biology, 2015Claviceps purpurea is an ovarian parasite infecting grasses (Poaceae) including cereals and forage plants. This fungus produces toxic alkaloids and consumption of contaminated grains can cause ergotism in humans and other mammals. Recent molecular genetics studies have indicated that it included three cryptic species (G1, G2, G3).
Sylvie Pažoutová +4 more
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ESTIMATION OF ERGOT ALKALOIDS IN CULTURES OF CLAVICEPS PURPUREA
Canadian Journal of Microbiology, 1959Methods for estimating the content of ergot alkaloids in cultures of Claviceps purpurea have been examined to select a simple but reliable assay procedure for evaluating the effects of cultural conditions and strain differences on yield. Modification of a solvent extraction method used for ergot sclerotia gave the most satisfactory results ...
L C, VINING, W A, TABER
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Application of oxygen vectors to Claviceps purpurea cultivation
Applied Microbiology and Biotechnology, 2001The application of a two-phase fermentation system for the production of ergot peptide alkaloids by Claviceps purpurea is described. Perfluorocarbons (PFC) are used as oxygen vectors in Claviceps fermentation for the first time. In shake-flask cultivations, the inclusion of PFC in the medium brings about a five-fold increase in the total alkaloid ...
M, Menge, J, Mukherjee, T, Scheper
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INFECTION OF BARLEY BY CLAVICEPS PURPUREA
Canadian Journal of Botany, 1958The development of infection of the ovary of Newal barley (Hordeum vulgare L.) by the ergot fungus, Claviceps purpurea (Fr.) Tul., was traced from the time of inoculation until formation of the sclerotia. Penetration took place within 24 hours near the base of the ovule.
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Development of stromata in Claviceps purpurea
Transactions of the British Mycological Society, 1968Observations on the development of Claviceps purpurea (Fr.) Tul. stromata showed that extension growth occurred only at the stalk apex. The rate of stalk elongation was greater in darkness than in diurnal conditions or continuous light and positive phototropic alignment of the clavae involved enhanced extension growth of hyphae on the shaded side of ...
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Semicontinuous cultivation of immobilized Claviceps purpurea
Applied Microbiology and Biotechnology, 1984Mycelia of Claviceps purpurea CBS 164.59 were immobilized in 2%, 4%, and 8% calcium alginate. Alkaloid production by free cells declined after 60 days, while immobilized cells retained their activity for 200 days. The cumulative alkaloid production for all fermentation cycles using 8% calcium alginate immobilized mycelia was 25 times higher than that ...
Bettina Kopp, H. J. Rehm
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Extrachromosomal genetics of Claviceps purpurea
Current Genetics, 1983In order to establish a system for gene cloning in the ergot fungus Claviceps purpurea mitochondrial DNA was purified from two wild strains and four descendants of production strains. A characterization of the mt DNA with respect to buoyant density, molecular weight (45 kb corresponding to acontour lenght of 14 μm) showed no differences.
P, Tudzynski, A, Düvell, K, Esser
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Sclerotium size and germination in Claviceps purpurea
Transactions of the British Mycological Society, 1966The relationship between the size of the Sclerotium and its behaviour during germination was investigated. Large sclerotia showed higher percentage germination levels at any given time during germination and gave rise to taller clavae than did smaller ones.
R.C. Cooke, D.T. Mitchell
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