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Search for "NOVOTNÝ D.": 13 articles found.
NOVOTNÝ D. (2022): Contribution to the endophytic mycobiota of aerial parts of oaks. [endophytes, Czech Republic, Quercus robur, Quercus petraea, acorns, seeds, twigs.] Czech Mycology 74(2): 111-121 (published: 1st July, 2022)
abstract
The endophytic mycobiota inhabiting branches of Quercus petraea from two localities in the Křivoklát area, and branches, twigs and acorns of Quercus robur from one locality near the town of Semily were studied (all sites in the Czech Republic). Seventeen fungal taxa were isolated from branches of Q. petraea. Dominant fungi were found to be Colpoma quercinum and Phoma sp. as well as sterile dark mycelium and a black yeast-like fungus close to Sarcinomyces crustaceus. Eighteen fungal taxa were found in samples of aerial parts in Quercus robur. The most frequently isolated taxa were Pezicula cinnamomea, Colpoma quercinum, Alternaria alternata agg. and Acremonium sp.
NOVOTNÝ D., LUKÁŠ J., BROŽOVÁ J., RŮŽIČKOVÁ P. (2019): Comparison of the occurrence of fungi causing postharvest diseases of apples grown in organic and integrated production systems in orchards in the Czech Republic. [Malus domestica, organic production, integrated production, Neofabraea, Penicillium.] Czech Mycology 71(1): 99-121 (published: 28th June, 2019)
abstract
During the years 2013–2015, the occurrence of fungi causing postharvest diseases of apples was evaluated in three apple orchards with integrated and organic production systems in the Czech Republic. The postharvest disease fungi were more frequently recorded in fruits from organically cultivated apple trees (average 29.97%) than those from integrated production (17.67%). This difference is statistically significant. Neofabraea, Penicillium, Alternaria and a sterile grey mycelium were the most frequently recorded taxa in apples grown in organic and integrated production systems. There were also significant differences in the frequency of occurrence of the most frequent fungal taxa between years. In 2013 and 2014, Neofabraea was the most frequently isolated genus in both cultivation systems, whereas in 2015, Penicillium was the most frequently recorded genus also in both cultivation systems, which was likely caused by the low precipitation in the 2015 growing season.
HORTOVÁ B., NOVOTNÝ D. (2011): Endophytic fungi in branches of sour cherry trees: a preliminary study. [Prunus cerasus, Czech Republic, mycobiota, endophytic fungi] Czech Mycology 63(1): 77-82 (published: 10th August, 2011)
abstract
Sour cherry trees (Prunus cerasus L.) harbour various fungal groups, including endophytes. Branches of two different cultivars of sour cherry trees (Újfehértoi Fürtös, Érdi Bötermö) were sampled in May and July 2010 at two study sites in the Czech Republic. Alternaria alternata and coelomycete sp. 1 were the dominant species in branches collected at one site. Aureobasidium pullulans was the most frequent fungal species in branches from the other site. Both species were dominant in May and July.
NOVOTNÝ D. (2010): First record of Ceratocystis laricicola (Ascomycota, Ceratocystidaceae) in the Czech Republic. [Ascomycota, ophiostomatoid fungi, Larix decidua, distribution, Ips cembra] Czech Mycology 62(1): 59-65 (published: 15th February, 2011)
abstract
During the study of large larch bark beetle (Ips cembrae) mycobiota, the species Ceratocystis laricicola was isolated. It was detected in galleries and on the surface of the beetle body. This fungus is a well-known larch pathogen and this observation is the first report of its occurrence from the Czech Republic.
ZOUHAR M., DOUDA O., NOVOTNÝ D., NOVÁKOVÁ J., MAZÁKOVÁ J. (2010): Evaluation of the pathogenicity of selected nematophagous fungi. [nematophagous fungi, nematodes, pathogenicity, Arthrobotrys, Dactylellina, Dactylella, Pochonia, Ditylenchus dipsaci, Globodera rostochiensis, Meloidogyne hapla] Czech Mycology 61(2): 139-147 (published: 10th August, 2010)
abstract
The virulence of selected strains of six nematophagous fungi on three species of phytopathogenic nematodes was evaluated, whereby differences in pathogenicity between the investigated fungal taxa were found. Arthrobotrys oligospora was the most pathogenic fungus to all three tested species of nematodes.
NOVOTNÝ D., JANKOVSKÝ L. (2005): Notes on mycobiota associated with Ips typographus from the Šumava Mts. (Czech Republic). [Piceaabies, ophiostomatoidfungi, bark beetles] Czech Mycology 57(1-2): 91-96 (published: 31st August, 2005)
abstract
In 1999 and 2000, stem samples of Norway spruce (Picea abies) infested by bark beetle (Ips typographus) from one spruce stand localitya ffected by massive infestation by Ips typographus in the central part of the Šumava mountains were taken.The mycobiota of 20 adults was studied. Eighteen species of microscopic fungi were recorded. Yeasts and ophiostomatoid fungi were detected most frequently.
NOVOTNÝ D., ŠRŮTKA P. (2004): Ophiostoma stenoceras and O. grandicarpum (Ophiostomatales), first records in the Czech Republic. [ophiostomatoid fungi, distribution, oak, roots, bark, Ceratocystis, Quercus petraea, Quercus robur] Czech Mycology 56(1-2): 19-32 (published: 12th August, 2004)
abstract
Two species of ophiostomatoid fungi were observed in oaks. Ophiostoma stenoceras was isolated during a study of endophytic mycobiota of the roots and seedlings of a sessile oak (Quercus petraea). Ophiostoma grandicarpum was recorded in the stem of a pedunculate oak (Q. robur). These fungi have not yet been reported from the Czech Republic. The knowledge on the occurrence of ophiostomatoid fungi in the Czech Republic is reviewed.
KUBÁTOVÁ A., KOLAŘÍK M., PRÁŠIL K., NOVOTNÝ D. (2004): Bark beetles and their galleries: well-known niches for little known fungi on the example of Geosmithia. [microfungi, Geosmithia, Scolytidae, ophiostomatoid fungi, yeasts] Czech Mycology 56(1-2): 1-18 (published: 12th August, 2004)
abstract
The oak bark beetle (Scolytus intricatus, Scolytidae, Coleoptera) was studied during the years 1997-2003 with respect to the occurrence of microscopic fungi on the surface of its body. Samples were collected in eight localities in the Czech and Slovak Republics. The investigation was focused on all different stages of the beetle’s life cycle: eggs, larvae, adults be for e emergence, adults in generation and maturation feeding (nearly 600 samples), and also on galleries (400 samples). The most frequent fungi associated with S. intricatus were yeasts, Geosmithia spp. and Penicillium spp. Ophiostomatoid fungi were isolated, too. Great attention was paid to the occurrence of Geosmithia spp., which were so far recorded rarely. They were frequently found in all stages of the life cycle of Scolytus intricatus, except for males in maturation feeding. The ecology of Geosmithia spp. in feedings of phloem inhabiting insects is discussed for their negative cellulase production and the ecology of associated insect species. Trees infested with Scolytus intricatus represent a major and still little explored niche of Geosmithia spp.
NOVOTNÝ D. (2003): A comparison of two methods for the study of microscopic fungi associated with oak roots. [Quercus robur, oakdecline, Czech Republic, mycobiota, ophiostomatoid fungi] Czech Mycology 55(1-2): 73-82 (published: 23rd July, 2003)
abstract
Roots of four trees with symptoms of oak decline and roots of one healthy tree of Quercus robur were examined for the presence of fungi by using two methods (moist chambe rmethod and strong surface sterilisation method). Forty-five species were isolated in this project. Significant differences in composition of mycobiota based on the used method were detected. Fusarium solani, F. proliferatum, Sphaerostilbella aureonitens, Cylindrocarpon destructans, Pénicillium simplicissimum, P. purpurogenumvar. rubrisclerotium, Trichodermaviride, Ophiostomapiceae s.l. and Pénicillium glandicola were the most frequent fungi isolated by the moist chamber method. Cryptosporiopsis radicicola, dark sterile mycelium sp. 1, Cylindrocarpon destructans, ChaetomiuM globosum, Cylindrocarpon didymum, Pénicillium simplicissimum and Trichoderma koningii were dominant species observed by the method of strong surface sterilisation.
NOVOTNÝ D. (2003): Cryptosporiopsis radicicola and Pezicula eucrita - neglected species of microscopic fungi in the Czech Republic. [endophytes, first record in the Czech Republic, roots, bark, Picea abies, Quercus, Pezicula cinnamomea, Prunus, Pezicula livida] Czech Mycology 55(1-2): 57-72 (published: 23rd July, 2003)
abstract
Cryptosporiopsis radicicola was frequently found during a study of endophytic mycobiota of oak roots in the Czech Republic from 1996 to 1999. This is the first record from this region. Pezicula eucrita was isolated from the bark of spruce stem in South Moravia. This species was frequently recorded during there vision of collections of Pezicula from conifers deposited in herbariain the Czech Republic. Alot of strains of there lated species Pezicula cinnamomea were obtained in pure culture. Till now, this fungus had only been known in the Czech Republic from herbarium specimens.
NOVOTNÝ D. (2002): Contribution to the knowledge of the mycoflora in roots of oaks with and without tracheomycotic symptoms. [Quercus robur, Q. petraea, Q. rubra, oak decline, ophiostomatoid fungi, Penicillium, Czech Republic, Moravia] Czech Mycology 53(3): 211-222 (published: 10th January, 2002)
abstract
The mycoflora of roots of three species of oak (Quercus robur, Q. petraea, Q. rubra) from two localities near Moravské Budějovice (southwest Moravia, Czech Republic) with and without tracheomycotic symptoms was studied. Fifty-seven species of fungi were identified from the samples. The most frequently isolated were Fusarium solani, Penicillium gl and icola, P. glabrum, P. simplicissimum and Acremonium curvulum. In the roots of trees with tracheomycotic symptoms two species of ophiostomatoid fungi were recorded. Abiotic condiontions (insufieciency of precipitation and higher average temperature) are considered to be primary reasons of oak decline.
NOVOTNÝ D. (2002): Diplogelasinospora princeps (Sordariales), the first record in the Czech Republic. [roots, bark, Diplogelasinospora princeps, Křivoklátsko region, endophytes, Quercus petraea, oak] Czech Mycology 53(3): 203-209 (published: 10th January, 2002)
abstract
Diplogelasinosporaprinceps, Sordariales, was isolated from the root of a sessile oak (Quercus petraea) in the Křivoklátsko region (Czech Republic) during a study of the endophytic mycoflora of roots. This is not only the first record in the Czech Republic, but probably the first record from Europe, too. Growth of the isolated strain under different conditions was tested.
KUBÁTOVÁ A., NOVOTNÝ D., PRÁŠIL K., MRÁČEK Z. (2000): The nematophagous hyphomycete Esteya vermicola found in the Czech Republic. [conidial fungi, Esteya vermicola, Bursaphelenchus eremus, Scolytus intricatus, nematodes, bark beetles] Czech Mycology 52(3): 227-235 (published: 7th December, 2000)
abstract
During a study of surface mycoflora of the bark beetle Scolytus intricatus (Coleoptera: Scolytidae), the hyphomycetous microfungus Esteya vermicola was found associated with Bursaphelenchus eremus (Nematoda: Aphelenchoididae). Esteya vermicola and Bursaphelenchus eremus were recorded in the Czech Republic for the first time. The find of E. vermicola is considered to be these cond one in the world. Esteya vermicola is a nematophagous species with two types of conidia, described in 1999 from the pinewood nematode Bursaphelenchus xylophilus in Taiwan. Our new records are from the surface of larvae and adult beetles of Scolytus intricatus and their galleries under bark of branches of three species of oak (Quercuspetraea, Q. polycarpa, and Q. robur) on several localities in the Polabí and Křivoklátsko regions, Czech Republic. A description of morphological features and drawings of the fungus are given. Examined strains are maintained in the Culture Collection of Fungi (CCF), Faculty of Science, Charles University, Prague and Czech Collection of Microorganisms (CCM), Faculty of Science, Masaryk University, Brno.
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