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Wyszukujesz frazę "stem canker" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Characterization of two coexisting pathogen populations of Leptosphaeria spp., the cause of stem canker of brassicas
Charakterystyka populacji dwóch współistniejących patogenów rodzaju Leptosphaeria spp., powodujących suchą zgniliznę kapustnych
Autorzy:
Kaczmarek, J.
Jedryczka, M.
Powiązania:
https://bibliotekanauki.pl/articles/26825.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
ascospore
stem canker
Brassica napus
Leptosphaeria maculans
Leptosphaeria biglobosa
oilseed rape
pseudothecium
pathogen population
brassica
plant disease
Brassicaceae
yield quality
yield quantity
vegetable
species coexistence
Opis:
Stem canker of brassicas, also known as blackleg is the most damaging disease of many Brassicaceae. The disease is caused by Leptosphaeria maculans (Desm.) Ces et de Not. and L. biglobosa sp. nov., Shoemaker & Brun, which coexist in plants and resulting in disease symptoms and decreased yield, quantity and quality of cultivated vegetables and oilseed rape. The paper presents taxonomic relationships between these coexisting pathogen species, describes particular stages of their life cycles, summarizes the differences between the species, and reviews methods for their identification.
Sucha zgnilizna, potocznie zwana czarną nóżką jest najgroźniejszą chorobą roślin rodziny Brassicaceae. Wywołują ją dwa patogeny Leptosphaeria maculans (Desm.) Ces et de Not. i L. biglobosa sp. nov. Shoemaker & Brun, które wspólnie kolonizują rośliny i prowadzą do powstania objawów chorobowych, utraty plonu oraz jakości warzyw kapustowatych i rzepaku. W niniejszym opracowaniu przedstawiono przynależność taksonomiczną i pokrewieństwo tych gatunków, szczegółowo opisano kolejne fazy rozwojowe obu patogenów, wskazano na różnice międzygatunkowe oraz metody identyfikacji opisanych gatunków.
Źródło:
Acta Agrobotanica; 2011, 64, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic polymorphism of Polish strains of Gremmeniella abietina and Brunchorstia pinea var. cembrae
Autorzy:
Kraj, W
Powiązania:
https://bibliotekanauki.pl/articles/41508.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
coniferous tree
plant pathology
pine
spruce
fir
juniper
pathogen
plant disease
shoot blight
canker
branch
stem
Gremmeniella abietina
Brunchorstia pinea var.cembrae
needle
genetic polymorphism
Polish strain
host preference
polymerase chain reaction
RFLP analysis
Opis:
Thirty-three type A strains of G. abietina from diseased shoots or needles of P. sylvestris, P. nigra and P. armandii and three strains of Brunchorstia pinea var. cembrae from P. mugo were isolated from four regions of Poland differing with respect to climatic conditions. Genetic polymorphism of the mitochondrial small subunit rRNA (mtSSU rRNA), ribosomal RNA fragment including ITS1, 5.8S and ITS2 and glyceraldehyde phosphate dehydrogenase (GPD) gene was examined by the PCR-RFLP method. Genetic distance was ascertained with respect to B. pinea var. cembrae strains from G. abietina isolated from the examinedpine species (average Nei coefficient 0.137). The smallest genetic distance occurred between the strain groups of G. abietina isolated from P. nigra and P. armandii (0.059) and P. nigra and P. sylvestris (0.061), whereas the highest occurred between the groups of strains deriving from P. armandii and P. sylvestris (0.096). The impact of geographic distance on genetic distance between groups of strains from individual regions has been shown. G. abietina strains originating from mountainous areas were more distanced genetically (on average 0.031) from populations from other regions (Nei genetic distance 0.023). The main factors influencing genetic differences of the pathogen were specificity with respect to the species of the host plant and climate conditions, whereas geographic distance had lesser significance.
Źródło:
Dendrobiology; 2009, 61; 13-21
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudothecial maturation and ascospore release of Leptosphaeria maculans and L. biglobosa in south-east Poland
Dojrzewanie pseudotecjów i uwalnianie askospor grzybów Leptosphaeria maculans i L. biglobosa w południowo-wschodniej Polsce
Autorzy:
Dawidziuk, A.
Kasprzyk, I.
Kaczmarek, J.
Jedryczka, M.
Powiązania:
https://bibliotekanauki.pl/articles/28538.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
pseudothecial maturation
ascospore release
Leptosphaeria maculans
Leptosphaeria biglobosa
Polska
stem canker
Brassica napus
oilseed rape
Opis:
Stem canker of brassicas is a severe disease of oilseed rape in Australia, Canada and Europe, including Poland. The disease is caused by Leptosphaeria maculans and L. biglobosa - two pathogens belonging to the class Dothideomycetes. The species differ in pathogenicity, but they have identical shape and size of fruiting bodies and spores of the generative and vegetative stages. Both pathogens are often found together in infected tissues of oilseed rape plants. The main goal of the experiments was to measure the rate of pseudothecial maturation and to monitor ascospore concentration of L. maculans and L. biglobosa in air samples. The paper is the first investigation on the generative stage development of these two species in south-east Poland. The studies were done for three consecutive years (2005-2007), for six most important months in pathogen development and plant infection, including 3 months in the spring (March – May) and 3 months in the autumn (September – November). The stage of pseudothecial maturation was assessed visually, based on the development of asci and ascospores. Monitoring of spore concentration in the air was performed using a Hirst-type 7-day volumetric trap. It was proved that differences in pseudothecial maturation rate in south-east Poland, encompassing the climatic regions of the Carpathian Foothills and Cracow, do not exceed two weeks within one season. The first and the highest ascospore concentration dates depended on weather conditions in a particular season. The total number of spores during the studied seasons varied from 9 to12 spores/m3, which was from 70 to 90 times lower than the average from five other monitoring sites around Poland. The short exposition to spore showers and very small concentrations of L. maculans and L. biglobosa ascospores in air samples were the most probable reasons for relatively small damage of oilseed rape crops by stem canker in the south-east part of Poland.
Źródło:
Acta Agrobotanica; 2010, 63, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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