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1

Przebieg procesu infekcji w ukladzie symbiotycznym rosliny motylkowate-Rhizobium

100%
Sujkowska M.
Wiadomości Botaniczne
|
2009
|
tom 53
|
nr 1-2
35-53
2

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
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.
3

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.
4
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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
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.
5

Localization of expansin-like protein in the apoplast of effective and ineffective pea root nodules

51%
Sujkowska M., Borucki W., Golinowski W.
Biological Letters
|
2005
|
tom 42
|
nr 2 Spec.Vol.
6

Localization of acid phosphatase activity in the apoplast of pea root nodules

51%
Sujkowska M., Borucki W., Golinowski W.
Polish Journal of Natural Sciences. Supplement
|
2003
|
tom 01
7

Localization of acid phosphatase activity in the apoplast of pea [Pisum sativum L.] root nodules grown under phosphorus deficiency

51%
Sujkowska M., Borucki W., Golinowski W.
Acta Physiologiae Plantarum
|
2006
|
tom 28
|
nr 3
ACPase activity was localized in the apoplast of pea root nodules under phosphorus deficiency. Pea plants (Pisum sativum L. cv. Sześciotygodniowy) where inoculated with Rhizobium leguminosarum bv. viciae 248 and were cultured on nitrogen-free medium with phosphate (-N/+P) or phosphate-deficient (-N/-P) one. In comparison with control nodules, P-deficient nodules showed the increase of ACPase activity in plant cell walls and the infection threads. The increase in bacterial ACPase activtty under P-deficiency may reflect higher det mand for inorganic phosphorus that is necessary for bacteria multiplication within the infection threads. The increase of ACPase activity in nodule apoplast under P stress may enlarge the availability of phosphate for plant and bacteria.
8
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Localization of expansin-like protein in apoplast of pea [Pisum sativum L.] root nodules during interaction with Rhizobium leguminosarum bv. viciae 248

51%
Sujkowska M., Borucki W., Golinowski W.
Acta Societatis Botanicorum Poloniae
|
2007
|
tom 76
|
nr 1
During nodule development on pea roots, apoplast undergoes changes in activity of plant cell wall proteins such as expansins (EXPs). Because the accumulation of EXP protein has been correlated with the growth of various plant organs, we investigated using Western Blot and immunolocalization studies with antibody against PsEXP1, whether this protein was accumulated in the expanding cells of nodule. Immunoblot results indicated the presence of a 30-kDa band specific for pea root nodules. The EXP proteins content rose during growth of pea root nodules. Expansin(s) protein was localized in nodule apoplast as well as in the infection thread walls. The enhanced amount of expansin-like proteins in meristematic part of nodule, root and shoot was shown. The localization of this protein in the meristematic cell walls can be related to the loosening of plant cell wall before cell enlargement. Both, plant cell enlargement and infection thread growth require activity of expansin(s). Possible involvement of EXPs in the process of pea root nodule development is also discussed.
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