Wyniki wyszukiwania

1

Embryology of Utricularia vulgaris L.

100%

Jankun A., Plachno B.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2000

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tom 42

|

nr 1

2

Comparison of nuclear protein SH-DNA ratio in species differing in 2C DNA content and dynamics of DNA endoreplication

100%

Marciniak K.

Folia Histochemica et Cytobiologica

|

1993

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tom 31

|

nr 1

3

Plant-plant allelopathy, preliminary investigations of the role of the cAMP signalling pathway

88%

Lbik-Nowak A., Godlewski M., Domanska A., Aniol P., Bilecka A.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr Suppl.

4

Morphology and anatomy of androgenetic embryogenesis of wheat

88%

Konieczny R., Czaplicki A. Z., Przywara L.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2000

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tom 42

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nr 1

5

Cytological features of various microspore derivatives appearing during culture of isolated maize microspores

75%

Goralski G., Rozier F., Matthys-Rochon E., Przywara L.

Acta Biologica Cracoviensia. Series Botanica

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2005

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tom 47

|

nr 1

Microspore derivatives occurring in culture of maize microspores were studied by light and electron microscopy. The cultures showed a high degree of heterogeneity throughout the whole period of cultivation. Several types of androgenic structures at different developmental stages were observed, indicating a high level of asynchrony among microspores following the androgenic pathway. During the first 5 to 7 days of culture, multicellular structures developed inside the exine. At later stages of culture the developing microspores ruptured the pollen wall and formed structures variable in cellular characteristics. Three main types were distinguished: (i) one-domain structures consisting of small or large cells only; (ii) two-domain structures with large and small cells, the domains differing in size and cellular characteristics; (iii) callus-like structures. The two-domain structures seem to resemble zygotic proembryos which also contain two different parts, the suspensor and the apical region. The observed variability is most likely related to differences in gene activity during the inductive stage of androgenesis and the genetic properties of the microspores themselves, rather than to the conditions of in vitro culture.

6

Autonomous endosperm formation in in vitro culture of unpollinated ovules of Viola odorata L.

75%

Wijowska M., Kuta E., Przywara L.

Folia Morphologica

|

1998

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tom 57

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nr 1

7

In situ hybridization of two nodule-specific gene products from yellow lupin

75%

Olszewska M. J., Karlowski W., Legocki A. B.

Folia Histochemica et Cytobiologica

|

1994

|

tom 32

|

nr 3

8

In situ DNA targeting by restriction: a critical evaluation

75%

Olszewska M. J.

Prace Naukowe Uniwersytetu Śląskiego w Katowicach

|

1998

|

tom 1696

9

The effects on lead absorption and toxicity of the preincubation of Allium sativum L. roots in selenium compounds

75%

Glinska S., Jasinska M., Gabara B.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

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nr Suppl.

10

Calcium in pollen-pistil interaction in Petunia hybrida Hort. II. Localization of Ca2 ions and Ca2 -ATPase in unpollinated pistil

75%

Bednarska E., Butowt R.

Folia Histochemica et Cytobiologica

|

1995

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tom 33

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nr 1

11

Development of the wall labyrinth in pavement epithelium hairs of some Utricularia species

75%

Plachno B. J., Jankun A., Faber J.

Acta Biologica Cracoviensia. Series Botanica

|

2005

|

tom 47

|

nr 1

Sodium hypochlorite-digested material and scanning electron microscopy was used to study the morphology of wall ingrowths in pavement epithelium hairs of Utricularia species from the primitive section Pleiochasia (U. volubilis) and the advanced section Utricularia (U. stygia, U. intermedia). Wall ingrowths were reticulate-type in all examined species. Wall ingrowth development started with the formation of small papillae, which later lengthened and eventually fused and branched, forming a network. The sequence of wall deposition in plant hairs is given for the first time with SEM. The wall labyrinth in transfer cells of pavement epithelium hairs was found to be far from static. Different stages of wall ingrowth development were observed within the same cell.

12

Polyploidization in the suspensor of Sophora japonica L. [Fabaceae]

75%

Biskup A., Izmailow R.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2000

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tom 42

|

nr 1

13

Cytogenetic plant test systems in chemical mutagenesis

63%

Osiecka R., Kontek R.

Prace Naukowe Uniwersytetu Śląskiego w Katowicach

|

1998

|

tom 1696

14

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

'Sweet but dangerous': nectaries in carnivorous plants

63%

Plachno B. J.

Acta Agrobotanica

|

2007

|

tom 60

|

nr 2

In carnivorous plants, two types of nectaries occur: extra- floral nectaries, generally associated with prey luring, and floral ones associated with pollination. Nectar produced by extra-floral nectaries not only attracts prey but may also be involved in trapping prey and plays a role in myrmecophily. The diversity of nectary structure in carnivorous plants reflects complicated evolutionary routes in this unique ecological group.

15

Microspores and pollen grain in triploid Chondrilla juncea L. from unpolluted and polluted areas

63%

Koscinska-Pajak M.

Acta Biologica Cracoviensia. Series Botanica

|

2000

|

tom 42

|

nr 2

Preliminary observations of plants collected at a natural locality in Jany (Zielona Góra district, Poland) suggested that in some plants dyads occurred mixed with more or less regular tetrads, monads, triads and polyads. Similar results were obtained in plants growing on an unpolluted site at an experimental field in Modlnica near Cracow and in a highly polluted area close to a postfloatation reservoir at the Żelazny Most copper mine near Rudna (Silesia). However, in the plants growing in contaminated soil a higher degree of degeneration processes was observed. Either dyads or tetrads prevailed in the capitula in the analyzed plants. In some of their loculi, dyads and tetrads were mixed with monads, dyads, triads and/or polyads. Microcytes and pollen grains of different sizes were common. The sterility of mature pollen grain was slightly higher in a plant from Żelazny Most (80-85%) than in its derivative from Modlnica (65-75%). Degeneration of whole anthers in the plant from the polluted locality was frequent. In some anthers the destruction of meiocytes started early, together with precocious abortion of the anther tapetum.

16

Morphological and histological aspects of 2,4-D effects on rape explants [Brassica napus L. cv. Kana] cultured in vitro

63%

Slesak H., Popielarska M., Goralski G.

Acta Biologica Cracoviensia. Series Botanica

|

2005

|

tom 47

|

nr 1

The effect of different durations of exposure to 2,4-D on hypocotyls and cotyledons cultured in vitro was studied in Brassica napus L. cv. Kana. Organogenesis or callogenesis depended on the duration of explant exposure to MS medium supplemented with 2 mg/1 2,4-D (2,4-dichlorophenoxyacetic acid). Short treatment (1 and 3 days) with 2,4-D resulted in rhizogenesis on hypocotyls (100% and 98% of explants, respectively) and cotyledons (80% and 54% of explants, respectively). Adventitious shoots formed sporadically, with the highest frequency (14% of explants) on hypocotyls cultured 3 days on MS supplemented with 2,4-D and then transferred to hormone-free medium. Histological analysis clearly indicated that the basal part of hypocotyls is involved in root formation and callus production, and the apical part for shoots. Meristematic sites originated from groups of cells in the cortex layer (including cells of the endoderm), but the procambium, phloem and pericycle also showed meristematic activity. The present study indicated that the response of explants cultured on media containing 2,4-D at constant concentration depends on the duration of explant exposure to growth regulator.

17

Mitotic activity and changes in DNA content during Zea mays L. endosperm development

63%

Kuran H., Marciniak K.

Acta Societatis Botanicorum Poloniae

|

2002

|

tom 71

|

nr 3

18

In vitro culture of isolated embryo sacs with few celled and globular embryos of Helianthus annuus L.

63%

Popielarska M., Przywara L.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2000

|

tom 42

|

nr 1

19

Embryological analysis of unpollinated ovaries of Viola L. cultured in vitro

63%

Wijowska M., Kuta E.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2000

|

tom 42

|

nr 1

20

Nuclear DNA degradation during development of Echinocystis lobata endosperm - programmed cell death

63%

Wojciechowska M.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2000

|

tom 42

|

nr 1

Ograniczanie wyników

Embryology of Utricularia vulgaris L.

Comparison of nuclear protein SH-DNA ratio in species differing in 2C DNA content and dynamics of DNA endoreplication

Plant-plant allelopathy, preliminary investigations of the role of the cAMP signalling pathway

Morphology and anatomy of androgenetic embryogenesis of wheat

Cytological features of various microspore derivatives appearing during culture of isolated maize microspores

Autonomous endosperm formation in in vitro culture of unpollinated ovules of Viola odorata L.

In situ hybridization of two nodule-specific gene products from yellow lupin

In situ DNA targeting by restriction: a critical evaluation

The effects on lead absorption and toxicity of the preincubation of Allium sativum L. roots in selenium compounds

Calcium in pollen-pistil interaction in Petunia hybrida Hort. II. Localization of Ca2 ions and Ca2 -ATPase in unpollinated pistil

Development of the wall labyrinth in pavement epithelium hairs of some Utricularia species

Polyploidization in the suspensor of Sophora japonica L. [Fabaceae]

Cytogenetic plant test systems in chemical mutagenesis

'Sweet but dangerous': nectaries in carnivorous plants

Microspores and pollen grain in triploid Chondrilla juncea L. from unpolluted and polluted areas

Morphological and histological aspects of 2,4-D effects on rape explants [Brassica napus L. cv. Kana] cultured in vitro

Mitotic activity and changes in DNA content during Zea mays L. endosperm development

In vitro culture of isolated embryo sacs with few celled and globular embryos of Helianthus annuus L.

Embryological analysis of unpollinated ovaries of Viola L. cultured in vitro

Nuclear DNA degradation during development of Echinocystis lobata endosperm - programmed cell death