scholarly journals Interaction between some fungi living on cereal seeding material

2014 ◽  
Vol 9 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Barbara Łacicowa
Keyword(s):  
Saprophytic Fungi ◽  
Helminthosporium Sativum ◽  
Sordaria Fimicola ◽  
Seeding Material ◽  
Fusarium Nivale

The biotic relations were evaluated between saprophytic fungi genera <i>Fusarium</i> and <i>Helmithosporium</i>. Most of the saprophytic fungi restricted the development of <i>Helmihthosporium sativum</i> and <i>H. triseptatum</i> more than that of <i>Fusarium nivale</i> and <i>F. avenaceum. Sordaria fimicola</i> was the only fungus which restricted the growth of <i>Helminthosporium sativum, H. triseptatum, Fusarium nivale</i> and <i>F. avenaceum</i>.

scholarly journals Occurrence of pathotypes of Phoma medicaginis var. pinodella (Jones) Boerema in the Olsztyn district

2013 ◽  
Vol 44 (1-2) ◽  
pp. 23-42 ◽  
Author(s):  
Helena Furgał-Węgrzycka
Keyword(s):  
Botrytis Cinerea ◽  
Alternaria Alternata ◽  
Cladosporium Cladosporioides ◽  
Saprophytic Fungi ◽  
Stemphylium Botryosum ◽  
Field Peas ◽  
Phoma Medicaginis ◽  
Microscopic Features ◽  
Sordaria Fimicola ◽  
Mycelia Sterilia

The causal agents of leaves and pods spot-pot of peas and field peas in the Olsztyn district was the fungus <i>Phoma medicaginis</i> var. <i>pinodella</i>. Investigated isolates of <i>P. medicaginis</i> var. <i>pinodella</i> differed by macroscopic and microscopic features. From diseases leaves and pods of peas and field peas obtained also saprophytic fungi among which <i>Alternaria alternata, Botrytis cinerea, Cladosporium cladosporioides, Epicoccum purpurascens, Stemphylium botryosum, Sordaria fimicola</i> and <i>mycelia sterilia</i> were dominated. In the study on the identification and distribution of pathotypes of <i>P. medicaginis</i> var. <i>pinodella</i> six pathotypes were identified among which pathotype 3 were dominated. The identified pathotypes differed by macroscopic and microscopic features.

scholarly journals Occurrence of pathotypes of Ascochyta pinodes (Jones) in the Olsztyn district

2013 ◽  
Vol 43 (1-2) ◽  
pp. 109-129 ◽  
Author(s):  
Helena Furgał-Węgrzycka
Keyword(s):  
Alternaria Alternata ◽  
Cladosporium Cladosporioides ◽  
Causal Agent ◽  
Saprophytic Fungi ◽  
Stemphylium Botryosum ◽  
Field Peas ◽  
Microscopic Features ◽  
Sordaria Fimicola ◽  
Ascochyta Pinodes ◽  
Mycelia Sterilia

The causal agent of leaf and pods spot-pot of peas and field peas in the Olsztyn district was the fungus <i>Ascochyta pinodes</i> (Jones). Investigated isolates of <i>A. pinoides</i> different by macroscopic and microscopic features. From diseased leaves and pods of peas and field peas saprophytic fungi were also obtained. Among them <i>Alternaria alternata, Cladosporium cladosporioides, Epicoccum purpurascens, Stemphylium botryosum, Sordaria fimicola</i> and mycelia sterilia were dominant. In the study on the identification and distribution of pathotypes of <i>A. pinodes</i> (Jones) six pathotypes were identified among which pathotypes 3 dominated. The identified pathotypes differed by macroscopic and microscopic features.

scholarly journals Inherited Differences in Crossing Over and Gene Conversion Frequencies Between Wild Strains of Sordaria fimicola From “Evolution Canyon”

Genetics ◽  
2001 ◽  
Vol 159 (4) ◽  
pp. 1573-1593
Author(s):  
Muhammad Saleem ◽  
Bernard C Lamb ◽  
Eviatar Nevo
Keyword(s):  
Genetic Variation ◽  
Gene Conversion ◽  
Spontaneous Mutation ◽  
Crossing Over ◽  
Natural Genetic Variation ◽  
Evolution Canyon ◽  
Wild Strains ◽  
Sordaria Fimicola ◽  
First And Second Generation ◽  
Consistent Direction

Abstract Recombination generates new combinations of existing genetic variation and therefore may be important in adaptation and evolution. We investigated whether there was natural genetic variation for recombination frequencies and whether any such variation was environment related and possibly adaptive. Crossing over and gene conversion frequencies often differed significantly in a consistent direction between wild strains of the fungus Sordaria fimicola isolated from a harsher or a milder microscale environment in “Evolution Canyon,” Israel. First- and second-generation descendants from selfing the original strains from the harsher, more variable, south-facing slope had higher frequencies of crossing over in locus-centromere intervals and of gene conversion than those from the lusher north-facing slopes. There were some significant differences between strains within slopes, but these were less marked than between slopes. Such inherited variation could provide a basis for natural selection for optimum recombination frequencies in each environment. There were no significant differences in meiotic hybrid DNA correction frequencies between strains from the different slopes. The conversion analysis was made using only conversions to wild type, because estimations of conversion to mutant were affected by a high frequency of spontaneous mutation. There was no polarized segregation of chromosomes at meiosis I or of chromatids at meiosis II.

Inherited and Environmentally Induced Differences in Mutation Frequencies Between Wild Strains of Sordaria fimicola From “Evolution Canyon”

Genetics ◽  
1998 ◽  
Vol 149 (1) ◽  
pp. 87-99
Author(s):  
Bernard C Lamb ◽  
Muhammad Saleem ◽  
William Scott ◽  
Nina Thapa ◽  
Eviatar Nevo
Keyword(s):  
Genetic Variation ◽  
Spontaneous Mutation ◽  
The South ◽  
Natural Genetic Variation ◽  
The North ◽  
Ascospore Germination ◽  
Evolution Canyon ◽  
Two Generations ◽  
Wild Strains ◽  
Sordaria Fimicola

Abstract We have studied whether there is natural genetic variation for mutation frequencies, and whether any such variation is environment-related. Mutation frequencies differed significantly between wild strains of the fungus Sordaria fimicola isolated from a harsher or a milder microscale environment in “Evolution Canyon,” Israel. Strains from the harsher, drier, south-facing slope had higher frequencies of new spontaneous mutations and of accumulated mutations than strains from the milder, lusher, north-facing slope. Collective total mutation frequencies over many loci for ascospore pigmentation were 2.3, 3.5 and 4.4% for three strains from the south-facing slope, and 0.9, 1.1, 1.2, 1.3 and 1.3% for five strains from the north-facing slope. Some of this between-slope difference was inherited through two generations of selfing, with average spontaneous mutation frequencies of 1.9% for south-facing slope strains and 0.8% for north-facing slope strains. The remainder was caused by different frequencies of mutations arising in the original environments. There was also significant heritable genetic variation in mutation frequencies within slopes. Similar between-slope differences were found for ascospore germination-resistance to acriflavine, with much higher frequencies in strains from the south-facing slope. Such inherited variation provides a basis for natural selection for optimum mutation rates in each environment.

STUDIES ON THE SEEDLING DISEASE OF BARLEY CAUSED BY HELMINTHOSPORIUM SATIVUM P.K. & B.

1956 ◽  
Vol 34 (4) ◽  
pp. 653-673 ◽  
Author(s):  
R. A. Ludwig ◽  
R. V. Clark ◽  
J. B. Julien ◽  
D. B. Robinson
Keyword(s):  
Disease Incidence ◽  
Infested Soil ◽  
Disease Development ◽  
Toxic Activity ◽  
Factors Affecting ◽  
Seedling Disease ◽  
Nutrient Salt ◽  
Helminthosporium Sativum ◽  
Treatment Comparisons

A standard sand – cornmeal – nutrient salt medium, for use in the production of artificial inoculum of Helminthosporium sativum, is described. This inoculum induces uniform plant disease development when thoroughly incorporated with the planting soil. The results presented clearly demonstrate the necessity of using a series of infestation levels in studies of factors affecting disease development in artificially infested soil. It is shown that considerable reliance can be placed on treatment comparisons within an experiment but that comparisons between experiments are much less accurate. The role of a toxin (or toxins) in disease development in barley seedlings has been demonstrated. The toxic activity was found to be distinct from that frequently encountered on addition of organic matter to soil. Results obtained suggest that toxin adsorption by the soil may play an important role in reducing disease incidence and severity.

Reexamination of the Taxonomic Disposition of and Deoxynivalenol Production by Fusarium nivale NRRL 3289

Mycologia ◽  
1991 ◽  
Vol 83 (3) ◽  
pp. 367 ◽  
Author(s):  
A. Logrieco ◽  
R. F. Vesonder ◽  
S. W. Peterson ◽  
A. Bottalico
Keyword(s):  
Fusarium Nivale

Mouse inoculation with various saprophytic fungi

Mycoses ◽  
2009 ◽  
Vol 20 (6) ◽  
pp. 229-234 ◽  
Author(s):  
Z. Hubálek
Keyword(s):  
Saprophytic Fungi
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