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Apoplastic ROS sensing and signalling

100%

Kangasjarvi J.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 2

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15N magnetic relaxation study of backbone dynamics of the ribosome-associated cold shock response protein Yfia of Escherichia coli

80%

Zhukov I., Bayer P., Scholermann B., Ejchart A.

Acta Biochimica Polonica

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2007

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tom 54

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nr 4

769-775

In the solution structure of the ribosome-associated cold shock response protein Yfia of Escherichia coli in the free state two structural segments can be distinguished: a well structured, rigid N-terminal part displaying a βαβββα topology and a flexible C-terminal tail comprising last 20 amino-acid residues. The backbone dynamics of Yfia protein was studied by 15N nuclear magnetic relaxation at three magnetic fields and analyzed using model-free approach. The over all diffusional tumbling of the N-terminal part is strongly anisotropic with a number of short stretches showing increased mobility either on a subnanosecond time scale, or a micro- to milli second time scale, or both. In contrast, the unstructured polypeptide chain of the C-terminal part, which cannot be regarded as a rigid structure, shows the predominance of fast local motions over slower ones, both becoming faster closer to the C-terminus.

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Effects of sulphur, fluoride and heavy metal pollution on the chlorophyll fluorescence of Scots pine (Pinus sylvestris L.) needles

80%

Pukacki P. M.

Dendrobiology

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2000

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tom 45

The photochemical activity of photosystem II (PSII) was measured by chlorophyll a fluorescence intensity of Scots pine needles, from trees growing in various forest experimental areas exposed to air and soil pollution. Fluorescence techniques was used as a no-invasive method of detection injuries of the photosynthetic apparatus. Chlorophyll fluorescence parameters such as PSII photochemical efficiency (Fv/Fm), chlorophyll fluorescence decrease ratio (Rfd) and size of the acceptor pools available to PSII (Sm) indicated seasonal changes in the activity of the photosynthetic apparatus of pine needles. Significant differences in the variable fluorescence parameter rations Fv/Fm and Rfd between the studied sites were found in middle-winter dormancy period in January and also in samples collected in August. Winter inactivation of photosynthesis results in areduction of the photochemical efficiency Fv/Fm and Rfd. Presented results demonstrate that the effect of industrial pollution on Scots pine needles is detectable by of measurements of fluorescence parameters. They showed that Scots pine trees indicated physiological adaptation to environmental pollution and this can be monitored by the fluorescence signals earlier than by other methods.

Ograniczanie wyników

1 Acta Biochimica Polonica

1 BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

1 Dendrobiology

1 Bayer P.

1 Ejchart A.

1 Kangasjarvi J.

1 Pukacki P. M.

1 Scholermann B.

1 Zhukov I.

1 2013

1 2007

1 2000

Apoplastic ROS sensing and signalling

15N magnetic relaxation study of backbone dynamics of the ribosome-associated cold shock response protein Yfia of Escherichia coli

Effects of sulphur, fluoride and heavy metal pollution on the chlorophyll fluorescence of Scots pine (Pinus sylvestris L.) needles