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1
Structural bases for effectivity of bacteroidal tissue in pea root nodules formed by effective or ineffective bacteria strain
100%
Borucki W.
Acta Societatis Botanicorum Poloniae
|
1997
|
tom 66
|
nr 2
165-176
2
Struktura i funkcjonowanie brodawek korzeniowych roslin motylkowych
100%
Borucki W.
Wiadomości Botaniczne
|
1998
|
tom 42
|
nr 1
41-61
3
Some new aspects of the pea [Pisum sativum L.] root nodule ultrastructure
100%
Borucki W.
Acta Societatis Botanicorum Poloniae
|
1996
|
tom 65
|
nr 3-4
221-233
4
Content available Proliferation of peroxisomes in pea root nodules - an influence of NaCl- or Hg2plus-stress conditions
100%
Borucki W.
Acta Societatis Botanicorum Poloniae
|
2007
|
tom 76
|
nr 4
287-298
EN
Morphometric procedures were used to examine peroxisome number and di-stribution in pea (Pisum sativum L.) root nodules under NaCl (50 mM) or HgCl2 (7.3 µM) treatment. Peroxisomes were visualized cytochemically in meristem, invasion zone and prefixing zone of pea root nodules by catalase (EC 1.11.1.6) activity. The observations using light and electron microscopy revealed that the peroxisomes were predominantly spherical in shape and showed catalase activity. In nitrogen fixation zone, catalase active peroxisomes were observed occasionally. Bacteroids of nitrogen fixing zone showed enhanced cata-lase activity probably as a response to higher level of oxidative stress. Fluorescence microscopy investigations revealed enhanced level of (homo)glutathione in prefixing and nitrogen-fixing zone of NaCl- and Hg2+treated nodules, which served as an indicator of antioxidative response. Morphometric measurements revealed that during differentiation of meristematic cells into central tissue (bacteroidal tissue) cells an increase in peroxisome number was observed in unstressed nodules. Peroxisomes located in meristem, invasion zone and prefixing zone of NaCl- and Hg2+-treated nodules outnumbered that in control nodules. A substantial enlargement of peroxisome profiles was detected in NaCl- and Hg2+treated nodules. Peroxisome divisions observed in meristematic and infection thread penetration zone were responsible for an increase in peroxisome number.
5
Strukturalne i metaboliczne adaptacje brodawek korzeniowych grochu do funkcjonowania w warunkach stresu abiotycznego
100%
Borucki W.
Rozprawy Naukowe i Monografie. Szkoła Główna Gospodarstwa Wiejskiego w Warszawie
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2007
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nr 313
1-140
6
Content available A comparative cytological and morphometric analysis of vacuolation in central tissue of the effective and ineffective pea [Pisum sativum L.] root nodules
100%
Borucki W.
|
|
nr 2
EN
Vacuoles play very important physiological roles in plant cells. Pea root nodules, which exhibit distinct zonation (meristematic zone and central tissue zones), may serve as a good experimental model for the investigations of vacuole development and its importance to cell and tissue functioning. Moreover, the nodule central tissue is composed of both infected and uninfected cells which play different physiological roles and differ in the level of vacuolation. Cytological observations revealed that central vacuoles of the infected cells of the effective nodules expand toward cell walls. Thus only thin layers of the cytoplasm separate each central vacuole from plasma membrane and cell wall. This finding is discussed from the viewpoint of improved exchange of solutes and water between the central vacuole and apoplast of the infected cell. Three-dimensional reconstruction of the vacuoles of infected cells within a fragment of effective nodule central tissue, showed their spatial arrangement. Possible advantages coming from the spatial arrangement of vacuoles within the central tissue are discussed. A comparative study of the central tissue (bacteroidal tissue) and meristem vacuolation of the effective and ineffective pea root nodules is also presented. Morphometric measurements revealed that the effective nodule central tissue was more vacuolated than the ineffective one. It was proved that maturation of the infected cells involves dynamic changes in their vacuolation. Having numerous fixing nitrogen bacteroids, the infected cells of effective central tissue were less vacuolated than uninfected cells. On the other hand, both infected and uninfected cells of the effective central tissue showed a much higher level of vacuolation in nitrogen-fixing zone than cells of the same type in ineffective tissue. These results indicate that vacuolation is an important factor in development and functioning of pea root nodule central tissue.
7
Localization of enzymatic activities in pea root nodules under abiotic stress conditions
100%
Borucki W.
Polish Journal of Natural Sciences. Supplement
|
2003
|
tom 01
8
Content available Localization of nitric oxide (NO) in effective and partially effective Medicago truncatula root nodules
63%
Bederska M. , Borucki W.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2013
|
tom 94
|
nr 2
9
Content available Localization of (homo)glutathione in effective and partially effective root nodules of Medicago truncatula root nodules
63%
Bederska M. , Borucki W.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2013
|
tom 94
|
nr 3
10
Medicago truncatula Gaertn. - roślina modelowa z rodziny bobowatych (Fabaceae)
63%
Bederska M. , Borucki W.
|
2012
|
tom 56
|
nr 1-2
11
The effects of sodium chloride-salinity upon growth, nodulation, and root nodule structure of pea (Pisum sativum L.) plants
63%
Borucki W. , Sujkowska M.
Acta Physiologiae Plantarum
|
2008
|
tom 30
|
nr 3
EN
Pea (Pisum sativum L.) plants inoculated with Rhizobium leguminosarum bv. viciae effective strain 248 were irrigated with nitrogen-free medium supplemented with 0, 25, 50 or 75 mM NaCl. The inhibitory effect of salinity on the growth of pea plants treated with 25 mM NaCl occurred 6 weeks post inoculation. In case of 75 mM NaCl treatment, the same effect was observed 2 weeks post inoculation. In contrast to investigations described in the literature our results clearly indicated that 25 mM NaCl stimulated nodule formation, however, in contrast to control nodules (the medium without NaCl), the nodules were considerably smaller. Remaining variants of salt treatment reduced plant growth, nodulation, and total nodule volume calculated per plant. Microscopic observations showed that salinity: (1) caused the loss of turgor of the nodule peripheral cells, (2) changed nodule zonation, (3) stimulated infection thread enlargement and expansion, (4) caused disturbances in bacterial release from the infection threads, and (5) induced synthesis of electron dense material (EDM) and its deposition in vacuoles. It was also found that cisternae of RER were involved in the formation of special cytoplasmic compartments responsible for synthesis of EDM. Autofluorescence study revealed that salinity increased accumulation of phenolics in pea nodules, as well.
12
Plastids are involved in the formation of anthocyanic vacuolar inclusions in potato tubers (Solanum tuberosum L.)
63%
Bederska M. , Borucki W.
Acta Societatis Botanicorum Poloniae
|
2010
|
tom 79
|
nr Suppl.1
13
Content available Nowa struktura rynku telekomunikacyjnego - nowe podmioty, nowe zachowania
63%
Borucki W. , Szarzec K.
Telekomunikacja i Techniki Informacyjne
|
2001
|
tom nr 3-4
3-22
PL
Omówiono kwestie wynikające z powstania takich nowych typów podmiotów, jak: operatorzy operatorów, giełdy telekomunikacyjne i izby rozliczeniowe. Podano informacje dotyczące rynku globalnego, a przede wszystkim spadku cen i wzrostu przepływności transmisji. Zasygnalizowano również niektóre zjawiska związane z modyfikacją tradycyjnych łańcuchów wartości dodanej w sektorze telekomunikacyjnym.
EN
The paper discusses some issues related to establishing new enterprises within the telecommunications sector such as: carriers' carriers, telecommunications on-line exchanges, global telecommunications clearing houses. The new structure of the market resulted from significant changes which took place in the global telecommunications sector: declining prices for telecommunications services and a high growth of trunk capacity due to the liberalization process and technological development. Moreover, some crucial modifications within the traditional value chains of telecommunications services, which determine new business relations within the sector, are also being discussed.
14
Sclerification of Sida hermaphrodita stems
51%
Janakowski S. , Leja I. , Borucki W.
Acta Societatis Botanicorum Poloniae
|
2010
|
tom 79
|
nr Suppl.1
15
Content available Localization of acid phosphatase activity in the apoplast of root nodules of pea [Pisum sativum]
51%
Sujkowska M. , Borucki W. , Golinowski W.
Acta Societatis Botanicorum Poloniae
|
2006
|
tom 75
|
nr 1
33-38
EN
Changes in the activity of acid phosphatase (AcPase) in the apoplast of pea root nodule were investigated. The activity was determined using lead and cerium methods. The results indicated a following sequence of AcPase activity appearance during the development of the infection thread: 1) low AcPase activity appears in the outer part of cells of symbiotic bacteria; 2) bacteria show increased AcPase activity, and the enzyme activity appears in the thread walls; 3) activity exhibits also matrix of the infection thread; 4) bacteria just before their release from the infection threads show high AcPase activity; 5) AcPase activity ceases after bacteria transformation into bacteroids. The increase in bacterial AcPase activity may reflect a higher demand for inorganic phosphorus necessary for propagation of the bacteria within the infection threads and/or involved in bacteria release from the infection threads.
16
Structure and development of lupine root nodules
51%
Golinowski W. , Lotocka B. , Kopcinska J. , Borucki W.
Folia Histochemica et Cytobiologica
|
1991
|
tom 29
|
nr 4
17
Reactive oxygen species generation and antioxidative status of Medicago truncatula nodules treated with copper or mercury
51%
Gorska-Czekaj M. , Szworst-Lupina D. , Borucki W.
Acta Societatis Botanicorum Poloniae
|
2010
|
tom 79
|
nr Suppl.1
18
The morphogenesis of lupine root nodules during infection by Rhizobium lupini
51%
Golinowski W. , Kopcinska J. , Borucki W.
Acta Societatis Botanicorum Poloniae
|
1987
|
tom 56
|
nr 4
19
Lokalization of acid phosphatase activity and expansis in the apoplast of pea root nodules
51%
Sujkowska M. , Borucki W. , Golinowski W.
Acta Physiologiae Plantarum
|
2004
|
tom 26
|
nr 3 suppl.
20
Morphometric characteristics of bacteroidal tissue in yellow lupine [Lupinus luteus L.] nodules
51%
Golinowski W. , Kopcinska J. , Borucki W.
Acta Societatis Botanicorum Poloniae
|
1992
|
tom 61
|
nr 3-4
307-318
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