Wyniki wyszukiwania - Biblioteka Nauki

1

Powstanie, rodzaje i rola zmiennosci w ewolucji

100%

Jerzmanowski A.

|

2009

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tom 58

|

nr 3-4

329-334

2

Organizacja chromatyny i kontrola aktywnosci genow u roslin

100%

Jerzmanowski A.

Działalność Naukowa PAN. Wybrane Zagadnienia

|

2003

|

tom 15

41-42

3

Struktura chromatyny a regulacja ekspresji genow.

100%

Jerzmanowski A.

Postępy Biologii Komórki. Suplement

|

1996

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tom 07

3-14

4

Chromatin in plant development

100%

Jerzmanowski A.

Acta Physiologiae Plantarum

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2004

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tom 26

|

nr 3 suppl.

5

Rosliny transgeniczne w biotechnologii

100%

Jerzmanowski A.

Biologia w Szkole

|

1996

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tom 49

|

nr 2

59-72

6

Wpływ postsyntetycznych fosforylacji na strukturę histonu H1 i jego funkcję w chromosomach (Minireview)

100%

Jerzmanowski A.

|

nr 3

7

Niekończący się dialog

100%

Jerzmanowski A.

|

2014

|

nr 08

8

Organizmy transgeniczne i rownowaga ekologiczna na ziemi

88%

Jerzmanowski A.

|

tom 98

|

nr 07-08

190-191

9

Organizmy transgeniczne i rownowaga ekologiczna na Ziemi.

75%

Jerzmanowski A.

Nauka. Polska Akademia Nauk

|

1997

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nr 2

92-93

10

Nowy program i podrecznik dla gimnazjum: Biologia XXI

75%

Jerzmanowski A.

|

nr 3

165-168

11

Effect of deoxyadenosine and cycloheximide on biogenesis of chromation in pea root tips

63%

Jerzmanowski A. , Toczko K.

|

nr 2

12

Właściwości bakteriocynogenne pałeczek Morganella morganii

63%

Sakowska D. , Jerzmanowski A.

Medycyna Doświadczalna i Mikrobiologia

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1988

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tom 40

|

nr 2

13

Histone H1 in modulation of chromatin transcriptional activity

63%

Jerzmanowski A. , Cole R. D.

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tom 40

|

nr 1

14

Badania nad strukturą nukleohistonu

51%

Kalinski A. , Mezykowski T. , Jerzmanowski A.

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1974

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tom 20

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nr 3

15

Characterization of DNA polymerase activity in isolated pea nuclei

51%

Jerzmanowski A. , Mezykowski T. , Pawelkiewicz A. , Toczko K.

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tom 21

|

nr 1

16

Genes of the AtSWI3 from Arabidopsis - homologues of yeast chromatin regulator - characteristics and analysis of physiological function in plants

51%

Sarnowski T. J. , Swiezewski S. , Rios G. , Jerzmanowski A.

|

tom 01

17

Organizmy modelowe w badaniach biologicznych

50%

Jerzmanowski A.

Biologia w Szkole

|

2003

|

tom 56

|

nr 2

68-69

18

Reforma matury a nauczanie biologii w szkole

50%

Jerzmanowski A.

|

nr 4

212-218

19

The sporogenous tissue and tapetum of transgenic tobacco plants (Nicotiana tabacum L.) with different levels of the histone H1 variants

45%

Slusarczyk J. , Wierzbicki A. , Tykarska T. , Jerzmanowski A. , Kuras M.

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2005

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tom 47

|

nr 1

20

Tapetum development in transgenic tobacco [Nicotiana tabacum L.] plants with modified level of histone H1 variants

45%

Slusarczyk J. , Tykarska T. , Wierzbicki A. , Jerzmanowski A. , Kuras M.

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nr 2

95-105

EN

The phenomenon of male sterility has often been observed in investigations on the role of histone H1 in regulation of morphogenetic and cytological processes in transgenic tobacco plants. These changes were accumulated by disturbances in flower development, consisting in lengthening of the pistil style in relation to stamen heads. This prevented pollination and production of seeds. As similar abnormalities occurred also in the present investigations (depending on combination, the sterility% was 84.4 to 19.9, at only 8.1 in the control), the main problem of our investigations was an attempt to explain their reasons. It is commonly known that one of the conditions for formation of fertile pollen is the properly functioning tapetum. Here, we carried out observations of ultrastructure of anther tapetum control cells in respect of abnormalities which occurred during microsporogenesis of transgenic plants with inactivated expression of two major (A, B) and two minor (C, D) histone H1 variants. The investigations were carried out on the following groups of plants: (1) control group with a full set of histone variants (K), (2) with inactivated A and B variants (-AB); (3) with inactivated A, B, C and D variants (-ABCD), (4) with inactivated C and D variants (-CD). It was found that tapetal development was normal in all the investigated groups of plants, and the sequence of changes was similar as in the control. However, certain ultrastructural differences appeared when tapetum functioned as secretory tissue, and in the degeneration phase. In tapetal cell cytoplasm, with participation of rER, lipid bodies were formed, which, having penetrated to the cell surface and to locules, took part in formation of pollen grain sporoderm. Both in the control and in the remaining combination, excluding -ABCD, these bodies looked similar: they were grey, homogenous and surrounded by black jagged deposits. In -ABCD plants, these bodies were more translucent, slightly rarefied, and not surrounded by the deposits. Moreover, in -CD plants, large lipid deposits were frequently observed between remainders of degraded tapetal cells. They did not occur in the control and the remaining combinations.