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Problems Microscopic fungi of wheat
HORTOVÁ, Bronislava
The aim of thesis was to monitor the natural occurrence, frequency and species diversity of microscopic fungi. The incidence was evaluated according to various environmental factors (soil reaction, the farming, crop, geographical location). Experimental crop was wheat, it was a variety Ebi, Alka, Meritto, Aranka and Zuzana. Samples of wheat were of three habitats - Lukavec, Prague-Ruzyne and Ceske Budejovice. The monitoring frequency of microscopic fungi has focused on Fusarium fungi. The incidence was monitored in terms of the impact site conditions, before crop, production system and the course of weather in a given year. A secondary attempt was to determine the yield of certain indicators. It was the determination of germination, the weight of one thousand seeds and the dimensional weight.
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Fungi in caves
Nováková, Alena
Data about the occurrence of microscopic fungi in several European caves (Czech Republic, Slovakia, Romania, Hungary, Slovenia and Spain) obtained during 20 years studies are presented
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Diversity and taxonomy of Trichoderma in the Czech Republic
Valinová, Šárka ; Kubátová, Alena (advisor) ; Nováková, Alena (referee)
Genus Trichoderma - anamorph of the genus Hypocrea (Hypocreaceae, Hypocreales, Sordariomycetes, Ascomycota) belongs to saprotrophic filamentous micromycetes. The representatives of this genus are known primarily as cosmopolitan inhabitants of soil ecosystems, including leaf litter and woody debris. This work summarizes the results of the study of isolates belonging to the genus Trichoderma originating from the territory of the Czech Republic, mainly from soil and leaf litter. During the study, altogether 267 isolates were analysed. For all of the isolates the following methods were used: phenotypic characterisation, UP-PCR fingerprinting, gene sequencing in tef 1α and ITS regions, and in the strain AK 115/00 also in rpb2 region. The main result of the study was the identification of 21 species of genus Trichoderma belonging into 4 groups and discovery of one isolate of species yet unknown to science. Species T. crassum, T. gamsii, T. ghanense, T. rossicum and T. longipile were found in the Czech Republic for the first time. According to the literature review and results of this study, 34 different Trichoderma species is currently known from the Czech Republic. In the work there is also discussed low reliability of identification of certain species based only on phenotypic characters. Key words:...
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Diversity and taxonomy of Trichoderma in the Czech Republic
Valinová, Šárka ; Kubátová, Alena (advisor) ; Nováková, Alena (referee)
Genus Trichoderma - anamorph of the genus Hypocrea (Hypocreaceae, Hypocreales, Sordariomycetes, Ascomycota) belongs to saprotrophic filamentous micromycetes. The representatives of this genus are known primarily as cosmopolitan inhabitants of soil ecosystems, including leaf litter and woody debris. This work summarizes the results of the study of isolates belonging to the genus Trichoderma originating from the territory of the Czech Republic, mainly from soil and leaf litter. During the study, altogether 267 isolates were analysed. For all of the isolates the following methods were used: phenotypic characterisation, UP-PCR fingerprinting, gene sequencing in tef 1α and ITS regions, and in the strain AK 115/00 also in rpb2 region. The main result of the study was the identification of 21 species of genus Trichoderma belonging into 4 groups and discovery of one isolate of species yet unknown to science. Species T. crassum, T. gamsii, T. ghanense, T. rossicum and T. longipile were found in the Czech Republic for the first time. According to the literature review and results of this study, 34 different Trichoderma species is currently known from the Czech Republic. In the work there is also discussed low reliability of identification of certain species based only on phenotypic characters. Key words:...
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Study of microscopic fungi in Zbrašov Aragonite Caves
Nováková, Alena
The first study of microscopic fungi in the Zbrašov Aragonite Caves was focused on microfungal outbreak of aragonite surfaces. Recently, the investigations were focused on the comparison of microfungal occurrence in sites with various CO.sub.2./sub. concentration and in the terms of monitoring of microscopic fungi in all show caves of the Czech Republic. Since 2009, microscopic fungi were regularly studied in cave air and sediments, species diversity and CFU counts were estimated in both substrates. Very interesting microfungal spectrum including a novel species of the genus .i.Aspergillus./i. (.i.A. "pseudoinsuetus"./i.) as well as interesting records about quantitative microfungal occurrence were found.
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Problems Microscopic Fungi of Oat
ŠTÝSOVÁ, Kateřina
This paper deals with evaluation of presence of pathogenic fungi in oats, in 4 strains and their variants, ways of treatment during growing season. As well, presence rate of studied phytopathogenic fungi, strategy of loss estimate and evalution of intensity of disease are determined. Furhermore, infection of pathogenes of Fusarium fungi is monitored, including evaluation of yield-forming elements. The purpose of in vitro experiments is to observe surficial microflora on oat seed.
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Microscopic fungi as food of cave invertebrate animals - a laboratory food preference experiment
Nováková, Alena ; Luptáčik, P. ; Kováč, L. ; Lukešová, Alena ; Šustr, Vladimír
The aim was to improve the methodology of the multi-choice food preference tests as a tool for investigation of feeding preference of cave invertebrates. Fungi and algae isolated from cave sediments of the Domica Cave system (NP Slovak Karst) were offered in cafeteria tests as a food to springtail .i.Folsomia candida./i., mites .i.Pantelozetes cavatica, Scheloribates pallidulus./i., and isopod .i.Mesoniscus graniger. M. graniger./i. preferred some species of algae, all offered fungi were rejected. Mainly algae and .i.Mucor./i. spp. from microscopic fungi are preferred by .i.S. pallidulus./i.. Preference of .i.Mucor./i. spp. was observed by cave mite .i.P. cavatica./i. and cave population of .i.F. candida./i. too. All cave animals showed low preference for offered food and have tendency to stay rather on clay cave sediment then on the food.
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Interesting records of microscopic fungi
Nováková, Alena
Six saprotrophic microfungi were presented in this paper - they were isolated during the study of micromycetes from cave systems of the Czech Republic, Slovakia and Romania and from soils of post-mining areas in the U.S.A. Their occurrence and morphology were compared with literature records.
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Phytophagous mites - a danger for mycological laboratories
Nováková, Alena
Phytophagous mites represent a danger for mycological laboratories in point of view of damaged cultures and of a contamination with fungal spores transported on mite surfaces. Causes of mites widespread, methods of their liquidation and protection of microfungal strains are presented in this article.
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