Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Response of Berberis thunbergii to heavy metals under urban pollution

100%

Chadzinikolau T., Kozlowska M., Mleczek M.

Dendrobiology

|

2010

|

tom 64

Increasing pollution of the environment causedby heavy metals is becoming a significant problem in developing cities. Species andcultivars of plants for urban plantings shouldexhibit tolerance to these pollutants, andwhat is even more significant, through their absorption they shouldred uce the level of environmental contamination. The aim of the research was to determine whether Berberis thunbergii (DC.), which was grown in the immediate vicinity of roads, developed mechanisms limiting harmful effects of accumulating heavy metals. The mechanism for heavy metal resistance, involving the generation of phytochelatins (PCs), was investigatedin relation to As, Cd, Cr, Co, Cu, Hg, Ni, Pb andZn accumulation. Levels of thiols, i.e. glutathione (GSH) andphytochelatins (PCs), increasedin plants grown in pollutedareas in the city of Poznań in comparison to a residential site (control) and it was related to the activity of phytochelatin synthase (PC-synthase) andthe accumulation of metals. The results indicate that in Berberis thunbergii growing in the polluted urban environment a defense mechanism adapting the plant to potentially adverse conditions was initiated.

2

Cadmium-treated Arabidopsis thaliana reveal a regulatory role of glutathione in superoxide dismutase

100%

Jozefczak M., Keunen E., Schat H., Remans T., Vangronsveld J., Cuypers A.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

3

Detoxification of cadmium in Nicotiana plumbaginifolia cell culture: the role of phytochelatins, organic acids and Cd-binding proteins

100%

Fenik S., Solodushko V., Trofimyak T., Blume Y.

Biological Bulletin of Poznań. Supplement

|

1997

|

tom 34

4

The synthesis of phytochelatins in lupin roots treated with lead ions

100%

Tomaszewska B., Tukendorf A., Baralkiewicz D.

Biological Bulletin of Poznań. Supplement

|

1996

|

tom 33

5

Cadmium effect on hydrogen peroxide, glutathione and phytochelatins levels in potato tuber

100%

Stroinski A., Zielezinska M.

Acta Physiologiae Plantarum

|

1997

|

tom 19

|

nr 2

Short-term treatment of potato tuber (Solanum tuberosum L.) dises with CdCl₂ (1mM) induced an oxidative stress, manifested by higher levels of H₂O₂, and activated the synthesis of phytochclatins ((γ-Glu-Cys)n-Gly): PC₂, PC₃ and PC₄. If in the tissues with a lower GSH level, the oxidative stress was induced by treatment with 3-aminotriazol (AT), or with AT and H₂O₂, the elevation of H₂O₂ and GSH levels and then some accumulation of thiols, including PC₂, PC₃ and PC₄, were observed. However, this increase of PC concentration was considerably lower when compared with the effects brought about by Cd⁺² treatment. If such a procedure of evoking subsequent moderate oxidative stress in tissues preceded Cd-treatment, a marked limitation of PC synthesis was observed. The presented results support the role of H₂O₂ as the second messenger in activating GSH synthesis and thus suggest a possibility of redox type regulation mechanism of PCs synthesis.

6

Cucumber cell responses to cadmium

84%

Gzyl J., Tukendorf A., Gwozdz E. A.

Biological Bulletin of Poznań. Supplement

|

1997

|

tom 34

7

Cd - tolerance of maize, rye and wheat seedlings

84%

Wojcik M., Tukendorf A.

Acta Physiologiae Plantarum

|

1999

|

tom 21

|

nr 2

The effect of cadmium on growth parameters of seedlings of maize, rye and wheat as well as the role of phytochelatins in Cd detoxication in these species were studied. Cadmium was found to inhibit root growth and decrease fresh weight and water content in roots and shoots of the studied plants. Although a considerably lower Cd accumulation was shown in maize seedlings than in other species, they were characterized by the highest sensitivity to cadmium. Among γ-Glu-Cys peptides synthetized by plant species, phytochelatins — glutathione derivatives predominated. In maize they were synthetized in amounts sufficient for binding the total pool of the metal taken up, and the detoxication mechanism was localized in their roots. Larger amounts of cadmium were accumulated in roots of wheat and rye, but the quantity of the formed γ-Glu-Cys peptides seems insufficient for detoxication of the metal.

8

The role of glutathione in detoxification of cadmium and excess copper in spinach plants

84%

Tukendorf A.

Acta Physiologiae Plantarum

|

1993

|

tom 15

|

nr 3

9

Lead tolerance mechanisms in Robinia pseudoaccacia L. - an attempt to a practical approach

67%

Winska-Krysiak M., Bernat J.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2008

|

tom 07

|

nr 3

Robinia pseudoaccacia plants grown hydroponically were treated Pb(NO3)2 with 15, 45 mg Pb²⁺ ∙ dm⁻³. After 6, 12, 24, 72 hours of the metal treatment the plants were collected and dissected organs. The plants accumulated and transported to ground part 0.88% and 1.35% of total accumulated lead for the lower and higher dose of Pb²⁺ respectively. The level of GSH was differed and depended on organs, dose and time treatment of Pb²⁺. We investigate (different pattern of expression) expression of RpGSH1 and RpPCS genes in roots. The study showed that glutathione and genes encoded enzymes connected with synthesis of him, plays important role in the process of detoxification in plant.

10

Phytochelatins and organic acids in adaptation of Armeria maritima ssp. halleri plants to calamine soils

67%

Olko A., Tukiendorf A.

Biological Letters

|

2005

|

tom 42

|

nr 2 Spec.Vol.

11

Overexpression of genes involved in phytochelatin biosynthesis in Escherichia coli: effects on growth, cadmium accumulation and thiol level

67%

Wawrzynska A., Wawrzynski A., Gaganidze D., Kopera E., Piatek K., Bal W., Sirko A.

Acta Biochimica Polonica

|

2005

|

tom 52

|

nr 1

In Escherichia coli, heterologous production of Schizosaccharomyces pombe phytochelatin synthase (PCS) along with overproduction of E. coli serine acetyltransferase (SAT) and gamma-glutamylcysteine synthase (gammaECS) was achieved and resulted in the accumulation of phytochelatins in bacterial cells. Overproduction of either gammaECS alone or simultaneous production of all three proteins in bacterial cells were accompanied by reduced growth rate in liquid cultures. Interestingly, bacteria overproducing either gammaECS or both SAT and gammaECS (with elevated level of gamma-glutamylcysteine but not of phytochelatins) were able to accumulate more cadmium per dry weight than the control. However, the most efficient cadmium accumulation was observed in bacteria with elevated levels of all three proteins: SAT, gammaECS and PCS. Therefore, “pushing” the entire pathway might be the most promising approach in modification of bacteria for potential bioremediation purposes because the level of intermediates, cysteine and glutathione, can limit the rate of production of phytochelatins. However, in such bacteria other metabolic process might become limiting for efficient growth.

12

Influence of cadmium, jasmonic acid and oxidative stress on phytochelatin synthase activity in potato leaves and roots

67%

Gizewska K., Stroinski A., Chadzinikolau T., Zielezinska M., Nuc P., Rucinski M.

Biological Letters

|

2005

|

tom 42

|

nr 2 Spec.Vol.

13

Phytochelatins and antioxidant enzymes in lupin roots exposed to heavy metals

67%

Rucinska R., Tukendorf A., Stroinski A., Gwozdz E. A.

Biological Bulletin of Poznań. Supplement

|

1997

|

tom 34

Ograniczanie wyników

Response of Berberis thunbergii to heavy metals under urban pollution

Cadmium-treated Arabidopsis thaliana reveal a regulatory role of glutathione in superoxide dismutase

Detoxification of cadmium in Nicotiana plumbaginifolia cell culture: the role of phytochelatins, organic acids and Cd-binding proteins

The synthesis of phytochelatins in lupin roots treated with lead ions

Cadmium effect on hydrogen peroxide, glutathione and phytochelatins levels in potato tuber

Cucumber cell responses to cadmium

Cd - tolerance of maize, rye and wheat seedlings

The role of glutathione in detoxification of cadmium and excess copper in spinach plants

Lead tolerance mechanisms in Robinia pseudoaccacia L. - an attempt to a practical approach

Phytochelatins and organic acids in adaptation of Armeria maritima ssp. halleri plants to calamine soils

Overexpression of genes involved in phytochelatin biosynthesis in Escherichia coli: effects on growth, cadmium accumulation and thiol level

Influence of cadmium, jasmonic acid and oxidative stress on phytochelatin synthase activity in potato leaves and roots

Phytochelatins and antioxidant enzymes in lupin roots exposed to heavy metals