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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Overexpression of stress-related genes in Cuscuta campestris in response to host defense reactions

100%
Rezaei H., Alamisaeed K., Moslemkhani C.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
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2017
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tom 98
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nr 2
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Developmental and cytochemical studies of the endosperm chalazal haustorium of Rhinanthus serotinus (Scrophulariaceae)

84%
Swierczynska J., Kozieradzka-Kiszkurno M., Bohdanowicz J.
Acta Biologica Cracoviensia. Series Botanica
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2013
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tom 55
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nr 1
We examined the development of the endosperm chalazal haustorium of Rhinanthus serotinus, using histochemical assays and light and electron microscopy. The chalazal haustorium is a huge single cell containing two enlarged nuclei. The nuclei are located in the middle of the haustorium cell. At the chalazal end of the haustorium cell structure, ultrastructural study revealed the presence of a transfer wall forming wall ingrowths. At all examined stages of haustorium cell development we identified insoluble polysaccharides, proteins, nucleic acids and lipid droplets. Macromolecules were especially abundant in the fully differentiated haustorium cell. Our results suggest that the endosperm chalazal haustorium is a site of intense metabolic activity.
3

The development of embryo and endosperm in Linum hirsutum L. subsp. byzantinum Azn.

84%
Yildirim C., Unal M.
Bulletin of the Polish Academy of Sciences. Biological Sciences
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1997
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tom 45
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nr 2-4
4

Cytological studies on Microdochium nivale infection in Lolium perenne (L.) plants

67%
Dubas E., Marzec K., Plazek A.
Zeszyty Problemowe Postępów Nauk Rolniczych
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2010
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tom 545
Winter hardiness of plants is limited mainly due to sensibility to Iow temperature and winter fungus damages. Snow mould is a disease that affects many species of winter cereals, turf and forage grasses. In Poland it is caused mainly by the common and economically important fungal pathogen Microdochium nivale causing pink snow mould, destructive disease of seedlings, stem bases and ears. The aim of the study was to investigate the dynamie of Microdochium nivale infection and cytological changes in cold-hardened Lolium perenne Danish cv. Darius. Plants were inoculated with mycelium. The studied plants demonstrated fast defence response to fungus attack, accumulating phenolics already one day after inoculation, however no infecting hyphae within leaf tissue at this time were detected. The first infection hyphae in plants were observed two days after inoculation. Microscopy observations revealed sheaths of the youngest leaves located in the crowns as the main infection way. These observations showed that Microdochium nivale hyphae uptake nutrients from the host by haustoria damaging the protoplasts of mesophyll cells causing their strong plasmolysis. This type of feeding is characteristic for biotrophic and hemibiotrophic parasites. Our observation proved that Microdochium nivale is a hemibiotrophic pathogen and inoculation with its mycelium is very effective and fast and causes serious damages of Lolium perenne cells.
5

Morphological variability of suspensor in Agrimonia L. [Rosaceae]

67%
Czapik R.
Acta Biologica Cracoviensia. Series Botanica
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1995
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tom 37
Two main types of suspensor: filamentous and massive, as well as its intermediary form, were observed at the cotyledonary stage of the embryo in Agrimonia eupatoria L. (2n = 28), A. pilosa Led. (2n = 28) and A. procera Wallr. (2n = 56). The nature of this variation, occurring in the same plant, is unknown but it gives an example of embryological intraspecific variability rarely described is suspensors of Angiospermae.
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