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Wyświetlanie 1-5 z 5
Tytuł:
Chemotypes and geographic distribution of the Fusarium graminearum species complex
Autorzy:
Przemieniecki, S. W.
Kurowski, T. P.
Korzekwa, K.
Powiązania:
https://bibliotekanauki.pl/articles/363266.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
chemotypes
Fusarium graminearum species complex
FGSC
genetic diversity
geographic distribution
chemotypy
Fusarium graminearum kompleks gatunku
zmienność genetyczna
podział geograficzny
Opis:
The Fusarium graminearum species complex (FGSC) consists of phylogenetically distinct pathogenic species. Isolates from various regions display genetic variety worldwide. Three type B trichothecene chemotypes have been identified within the FGSC: nivalenol, 3-deoxynivalenol and 15-deoxynivalenol. The variations in morphological, genetic and virulence traits of FGSC fungi can be attributed mainly to their geographic boundaries. The geographic range of host plants, type of farming system and weather conditions also influence the prevalence of FGSC taxa. The geographic distribution of FGSC members may reflect not only their chemotype but also adaptive traits. While 15-acetyl-deoxynivalenol (15-ADON) chemotype is prevalent in most of Europe, the 3-acetyl-deoxynivalenol (3-ADON) chemotype has achieved greater prevalence in parts of North America. The Asian species F. asiaticum has spread into new territories. Isolates of F. asiaticum have been identified in North America and Europe, and the species has recently been reported to be infecting cereal crops in South America. The occurrence of numerous members of the FGSC in those regions and the introduction of F. asiaticum into new areas raise significant food safety concerns and indicate the need for monitoring mycotoxin concentrations in harvested grain.
Źródło:
Environmental Biotechnology; 2014, 10, 2; 45-59
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grzyby towarzyszące ryzomorfom Armillaria spp. na Populus tremula L.
Fungi associated with Armillaria spp. rhizomorphs on Populus tremula L.
Autorzy:
Damszel, M.
Przemieniecki, S.
Dyczewska, K.
Mastalerz, J.
Powiązania:
https://bibliotekanauki.pl/articles/2142634.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
Common Aspen
Armillaria cepistipes
Armillaria ostoyae
topola osika
Opis:
The economic significance of aspen Populus tremula L. is only marginal, which is the main reason for its low share in the structure of stands. However, aspen can play a decisive ecological role as a pioneer tree in the succession of forest communities and may decrease the occurrence of pathogenic fungi. Aspen is also dying out and in order to determine possible biotic causes, we examined taxa of fungi using classical and mo- lecular methods in the area of the Czerwony Dwór Forest District, Subdistrict Rogale, compartments 74b and 75j. The health of aspen trees and the quantitative and qualitative structure of microorganisms associated with Armillaria spp. was evaluated. Based on our health assessment of the aspen, we conclude that the main reason for its dying out is the intensification of root rot, which is a result of Armillaria spp weakening the trees. In the general pool of Armillaria-associated microorganisms, sapro- trophs were dominating, and the fungus Fomitopsis pinicola commonly inhabited the poplar stems, whereas pathogen antagonists comprised the lowest proportion. In the quantitative and qualitative structure of fungi found in rhizomorphs, the composition of ecological groups inhabiting stumps was found to be favourable nevertheless. The increasing frequency of pathogens on the logs is a major premise for removing trees affected by Armillaria, because aspen stumps are a good food base for A. cepistipes and A. ostoyae which ultimately spread within the stand. Treatment of stumps with preparations stimulating the decomposition of wood is not recommended for logs that form the food base for pathogenic fungi.
Źródło:
Leśne Prace Badawcze; 2020, 81, 3; 115-122
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of psychrotrophic bacteria isolated from the root zone of winter wheat on selected biotic and abiotic factors
Autorzy:
Przemieniecki, S.W.
Kurowski, T.P.
Korzekwa, K.
Karwowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/66577.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The roots of winter wheat plants, cv. Mikon, grown in 45-year monoculture, were analysed in the study. Twenty-two bacterial isolates obtained from the rhizosphere, rhizoplane, and endorhizosphere that were capable of growth at 8°C and at 28°C, were selected for further analysis. The isolated psychrotrophs accounted for 25% of all bacteria present in the wheat rhizosphere and capable of growth at 8°C. Psychrotrophic bacteria were analysed at a temperature of 10°C and 28°C to determine their ability to inhibit the growth of pathogenic fungi, solubilise mineral phosphates, and to determine their ability to degrade chitin and cellulose. Similarity between the isolates was determined by Enterobacterial Repetitive Intergenic Consensus – Polymerase Chain Reaction (ERIC-PCR) and Random Amplification of Polymorphic DNA – Polymerase Chain Reaction (RAPD-PCR). The majority of isolated psychrotrophs inhibited the growth of pathogenic fungi and solubilised mineral phosphates at both incubation temperatures. Psychrotrophic bacteria exerted a two-fold stronger inhibitory effect on mycelial growth at 10°C than at 28°C. The growth of Fusarium culmorum and F. oxysporum was inhibited to the highest extent at 10°C and at 28°C, respectively. Phosphate solubilisation rates were higher at 28°C, particularly in the rhizosphere. Regardless of temperature, the bacteria exhibited low chitin-degrading potential, and none of the isolates was capable of degrading cellulose. A high similarity between the selected psychrotrophs was revealed by ERIC-PCR and RAPD- -PCR analyses. Based on RAPD-PCR, the analysed population was divided into a group of isolates obtained from the rhizosphere, and two groups comprising representatives of both the rhizoplane and the endorhizosphere. Due to their ability to grow over a wide temperature range and increase phosphorus availability to plants, and their antagonism against pathogens, psychrotrophic bacteria can be used to improve the growth and yield of cereal crops.
Źródło:
Journal of Plant Protection Research; 2014, 54, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of a harvest date and cutting height on the concentrations of carotenoids and tocopherols in Virginia fanpetals (Sida hermaphrodita) herbage and silage
Autorzy:
Antoszkiewicz, Z.
Fijalkowska, M.
Mazur-Kusnirek, M.
Przemieniecki, S.
Purwin, C.
Powiązania:
https://bibliotekanauki.pl/articles/13834.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2019, 24, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plant growth promoting properties of Serratia fonticola ART-8 and Pseudomonas putida ART-9 and their effect on the growth of spring wheat (Triticum aestivum L.)
Autorzy:
Przemieniecki, S. W.
Kurowski, T. P.
Kotlarz, K.
Krawczyk, K.
Damszel, M.
Karwowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/363300.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
Fusarium
plant growth promoting bacteria
Pseudomonas putida
Serratia fonticola
spring wheat
Opis:
Two bacterial strains, Serratia fonticola ART-8 and Pseudomonas putida ART-9, were isolated from soil sown with rye in a monoculture. Although the S. fonticola strain produced more chitinase than the P. putida strain, P. putida produced more cellulase, lipase, HCN, and fluorescent siderophores. P. putida also solubilized more phosphate, and was the only strain to produce pyoverdine. Neither bacteria produced indoleacetic acid (IAA), nor did they produce siderophores on the CAS medium. Neither of the strains was highly effective at inhibiting Fusarium culmorum (~5%) or F. oxysporum (~24%). Wheat plants inoculated with these bacterial strains had higher (5.7-10.0%) thousand kernel weight and there appeared to be a positive association between thousand kernel weight and ear length.
Źródło:
Environmental Biotechnology; 2016, 12, 2; 35-39
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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