Wyniki wyszukiwania

1

New variations of endosperm development in Campanulaceae

100%

Zhinkina N. A., Kamelina O. P.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

1999

|

tom 41

|

nr 1

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

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

|

2013

|

tom 55

|

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

Microfilament cytoskeleton of endosperm chalazal haustorium of Rhinanthus serotinus [Scrophulariaceae]

84%

Swierczynska J., Bohdanowicz J.

Acta Biologica Cracoviensia. Series Botanica

|

2003

|

tom 45

|

nr 1

The actin cytoskeleton of endosperm and of the mature endosperm chalazal haustorium cell of Rhinanthus serotinus was examined by immunohistochemistry and epifluorescence microscopy. A prominent actin cytoskeleton composed of numerous cross-linked filaments is present at the distal pole of the chalazal haustorium cell. Thick, longitudinally oriented bundles of microfilaments localize in transvacuolar cytoplasmic strands. A meshwork of delicate actin filaments surrounds the large polytene nuclei; some of the filaments radiate from the nuclear envelopes. Abundant and clearly visible actin filaments also occur at the proximal pole of the haustorium cell. A network of microfilaments in cortical cytoplasm and F-actin arrays associated with nuclei are found in endosperm proper cells.

4

Polyploidization of endosperm chalazal haustorium of Rhinanthus serotinus [Scrophulariaceae]

84%

Swierczynska J., Kozieradzka-Kiszkurno M., Bohdanowicz J.

Acta Biologica Cracoviensia. Series Botanica

|

2005

|

tom 47

|

nr 1

The paper reports a study of karyological differentiation of the chalazal endosperm haustorium of Rhinanthus serotinus (Schönheit) Oborny. Polyploidization began soon after the formation of the haustorium cell. The fully differentiated chalazal haustorium is a large elongated cell containing two huge nuclei. The nuclei are situated halfway along the length of the haustorium cell. Measurements of their nuclear DNA content revealed its degree of ploidy, which could attain a maximum 768C. Nuclei with higher (192C-384C) and the highest (768C) levels of ploidy were found in mature chalazal haustorium cells (from 100- to 500-celled endosperm proper). During polyploidization, the volume of the nuclei increased, and changes in the chromatin structure of polyploid nuclei were noted. With increasing levels of ploidy, polytene chromosomes were observed in haustorium nuclei. The rhythmical increase of DNA content and changes in nuclei size and chromatin structure point to endoreduplication as the mechanism of polyploidization of the haustorium cell.

5

Embryology of Trichosanthes dioica Roxb. [Cucurbitaceae]

67%

Pandey A. K.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

1999

|

tom 41

|

nr 1

Ograniczanie wyników

3 Acta Biologica Cracoviensia. Series Botanica

2 Acta Biologica Cracoviensia. Series Botanica. Supplement

3 Bohdanowicz J.

3 Swierczynska J.

2 Kozieradzka-Kiszkurno M.

1 Kamelina O. P.

1 Pandey A. K.

1 Zhinkina N. A.

1 2013

1 2005

1 2003

2 1999

New variations of endosperm development in Campanulaceae

Developmental and cytochemical studies of the endosperm chalazal haustorium of Rhinanthus serotinus (Scrophulariaceae)

Microfilament cytoskeleton of endosperm chalazal haustorium of Rhinanthus serotinus [Scrophulariaceae]

Polyploidization of endosperm chalazal haustorium of Rhinanthus serotinus [Scrophulariaceae]

Embryology of Trichosanthes dioica Roxb. [Cucurbitaceae]