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Wyświetlanie 1-4 z 4
Tytuł:
Microorganisms colonizing the leaves, shoots and roots of boxwood (Buxus sempervirens L.)
Autorzy:
Kurzawińska, H.
Mazur, S.
Nawrocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/12690867.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant cultivation
common box
Buxus sempervirens
Suffruticosa cultivar
ornamental plant
ornamental shrub
evergreen plant
Alternaria alternata
Macrophoma candollei
Fusarium buxicola
Volutella buxi
microorganism
plant pathogen
fungal pathogen
fungal disease
fungal colonization
fungi colonizing plant
plant disease
leaf
root
shoot
Opis:
Buxus sempervirens (L.) is an evergreen shrub often used in urban plantings intended for forming the trimmed hedges, as well as for creating geometrical shapes. Its decorative qualities are often diminished by the effects of pathogens colonizing the roots, shoots and leaves. The study was conducted in three consecutive growing seasons. The experimental material originated from a nursery located in southern Poland. The subjects under study were diseased leaves, stems and roots of the boxwood variety ‘Suffruticosa’. Samples consisting of 720 diseased fragments of the shrub were taken for mycological examination. Mycological isolations were performed according to the standard methods used in phytopathology. A total of 1059 colonies of fungi and fungus-like organisms were isolated from the diseased boxwood plants. The fungus Alternaria alternata dominated among all the isolates. The pathogens frequently isolated from the leaves included Macrophoma candollei, Volutella buxi and Fusarium buxicola. Those frequently isolated from the shoots included: Pestalotiopsis sydowiana, Volutella buxi and Fusarium avenaceum. The root system, in turn, was colonized in large numbers by: Fusarium oxysporum, F. avenaceum, Rhizoctonia solani, Botrytis cinerea and Phytophthora cinnamomi. Results of the three-year study show a comprehensive participation of phytopathogens in the disease process affecting the boxwood variety ‘Suffruticosa’.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 151-156
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photosynthetic ecophysiology of evergreen leaves in the woody angiosperms - a review
Autorzy:
Wyka, T.P.
Oleksyn, J.
Powiązania:
https://bibliotekanauki.pl/articles/40993.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
photosynthesis
ecophysiology
evergreen plant
leaf
plant anatomy
angiosperm
winter photosynthesis
winter photoinhibition
Opis:
Evergreen plants are an important component of many ecosystems of the world and occur in numerous evolutionary lineages. In this article we review phenotypic traits of evergreen woody angiosperms occurring in habitats that regularly experience frost. Leaf anatomical traits such as sclerenchymatic tissues or prominent cuticles ensure mechanical strength while often enhancing tolerance of water deficit. The low ratio of photosynthetic to nonphotosynthetic tissues as well as modified cell wall structure and nitrogen allocation patterns in evergreen leaves result in lower mass-based photosynthetic rate and photosynthetic nitrogen use efficiency in comparison with deciduous leaves. Their photosynthetic apparatus is adapted for the survival of frost in a down-regulated state with potential for photosynthetic activity in winter during periods of permissive temperatures. Leaf structure interacts with the mechanisms of frost survival. Stem xylem in evergreen plants tends to contain smaller diameter conduits incurring greater resistance to freeze/ thaw induced cavitation than in deciduous plants, although at the cost of reduced hydraulic efficiency. In contrast, no such differences in hydraulic conductivity have been documented at the leaf level. There is evidence for reduced structural plasticity of evergreen leaves in response to variability in irradiance, however photosynthetic downregulation occurs in mature leaves in response to self shading. Some evergreen species exhibit slow leaf development and “delayed greening”, while in many species aging is also a very protracted process. Finally, evergreen leaves may participate in carbohydrate and, less obviously, in nitrogen storage for the support of spring shoot and foliage growth, although the importance of this function is under debate. In conclusion, the evergreen leaf habit is correlated with numerous structural and functional traits at the leaf and also at the stem level. These correlations may generate trade-offs that shape the ecological strategies of evergreen plants.
Źródło:
Dendrobiology; 2014, 72
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozmnazanie bukszpanu wieczniezielonego [Buxus sempervirens L.] odmian 'Angustifolia' i 'Suffruticosa' z sadzonek zielnych
Autorzy:
Babelewski, P
Strzelecka, K
Powiązania:
https://bibliotekanauki.pl/articles/801513.pdf
Data publikacji:
2006
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
Buxus sempervirens
bukszpan wieczniezielony
bukszpan Angustifolia
bukszpan Suffruticosa
odmiany roslin
rosliny ozdobne
krzewy ozdobne
rosliny wiecznie zielone
sadzonki zielne
rozmnazanie roslin
common box
Angustifolia cultivar
Suffruticosa cultivar
plant cultivar
ornamental plant
ornamental shrub
evergreen plant
softwood cutting
plant propagation
Opis:
W szkółkach bukszpan wieczniezielony rozmnaża się z półzdrewniałych sadzonek pędowych w terminie od sierpnia do kwietnia, kiedy rośliny są w stanie spoczynku. Celem doświadczenia była ocena możliwości rozmnażania bukszpanu z sadzonek pędowych wierzchołkowych zielnych, ciętych z przyrostów tegorocznych w trakcie wzrostu krzewów. Sadzonki odmian ‘Angustifolia’ i ‘Suffruticosa’ sporządzano w trzech terminach: 30 maja, 15 i 30 czerwca 2004 roku. Połowę sadzonek traktowano Ukorzeniaczem AB, pozostałe stanowiły sadzonki kontrolne. Procent ukorzenienia sadzonek oraz liczbę i długość korzeni oceniono po 56 dniach ukorzeniania. Sadzonki zielne bukszpanu wieczniezielonego, niezależnie od odmiany, terminu sadzonkowania i traktowania Ukorzeniaczem AB, ukorzeniły się w 71%. Najlepszym terminem do ukorzeniania sadzonek w 2004 był termin najwcześniejszy, tj. 30 maja. Im późniejszy był termin, tym słabiej ukorzeniały się sadzonki. Zastosowanie preparatu Ukorzeniacz AB zwiększyło procent ukorzenionych sadzonek zielnych bukszpanu wieczniezielonego, nie wpłynęło natomiast istotnie na jakość systemu korzeniowego. Bukszpan wieczniezielony można rozmnażać z sadzonek zielnych ciętych w terminie od 30 maja do 30 czerwca. Rozmnażanie bukszpanu wieczniezielonego za pomocą sadzonek zielnych może znacznie skrócić okres produkcji roślin, gdyż sadzonki są dobrze ukorzenione już po 56 dniach.
In nurseries Buxus sempervirens is propagated by semi hard-wood cuttings from August to April, when plants are dormant. Such process lasts 3-5 months. The purpose of this study was to examine if it is possible to propagate buxus from soft-wood cuttings, taken from young, intensively growing shoots. Such cuttings of buxus cultivars 'Angustifolia’ and ‘Suffriticosa’ were taken at three dates, from the end of May to the end of June 2004. Half of them was treated with rooting stimulator „Ukorzeniacz AB” (containing IBA and NAA), the rest were the control cuttings. On average, the cuttings rooted in 71%. The best term for rooting was the earliest one, 30th of May. Treating with „Ukorzeniacz AB” increased the percentage of rooting, but did not influence the quality of root system. The results showed that Buxus sempervirens can be propagated from soft-wood cuttings in May and June. What is more, such propagation can shorten the whole process, as cuttings had strong root systems after 56 days.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 510, 1; 65-69
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal patterns of free proline and carbohydrate levels in cherry laurel (Prunus laurocerasus) and ivy (Hederea helix) leaves and resistance to freezing and water deficit
Autorzy:
Bandurska, H
Plachta, M.
Woszczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/41593.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
evergreen shrub
woody plant
seasonal change
temperature
climate
water-soluble carbohydrate
proline
free proline
carbohydrate level
leaf
cherry laurel
Prunus laurocerasus
ivy
Hedera helix
freezing resistance
water deficit
resistance
Opis:
Seasonal changes in the levels of water-soluble carbohydrates, free proline and tolerance to freezing and water deficit were studied in leaves of cherry laurel (Prunus laurocerasus) and ivy (Hedera helix). Frost and water deficit tolerance was estimated based on the measurement of electrical conductivity of aqueous media containing leaf discs that were previously treated with frost (–7°C) or polyethylene glycol solution (PEG 600), respectively. Carbohydrate content in leaves of examined species changed differently throughout the measurement period. In laurel leaves the highest carbohydrate level was found in February, while it was lowest in June. In contrast, in ivy leaves the highest carbohydrate content was recorded during summer (June, July), while the lowest in February. However, a lack of correlation between soluble carbohydrate level and membrane injury index was shown in this study. Free proline content in leaves of investigated species was the highest in early spring, i.e. April. The lowest level of free proline in laurel leaves was found in July, September and October, but in ivy from July to February. A negative correlation between proline content and membrane injury index observed in frost and PEG treated leaves of both species suggest that this amino acid may have resulted on membrane protection.
Źródło:
Dendrobiology; 2009, 62; 3-9
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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