Wyniki wyszukiwania

1

Oxidative metabolism after anaerobiosis in barley [Hordeum vulgare L.] seedlings

100%

Szal B., Rychter A. M.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

2

Effect of anaerobiosis on alcohol dehydrogenase in oat seedlings

86%

Kato-Noguchi H.

Acta Physiologiae Plantarum

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1999

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tom 21

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nr 4

3

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of intensity introduced through optical fibres on soil redox status and gases evolution

72%

Stepniewska Z., Tokarz E.

Acta Agrophysica

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2012

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tom 19

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nr 1

This paper proposes a new solution for improving oxygenation state of anaerobic medium by means of optical fibres. Visible light (400-750 nm) of varying intensity (811-4866 lx) was introduced through optical fibres to an anaerobic medium (Eutric Fluvisol) for 10 days, which could activate phototrophic microorganisms producing oxygen, and indirectly change the redox potential (Eh) and the gas composition formed during the incubation period. Control showed a significant decrease of Eh from the initial level of 320.8 mV to 50.6 mV at the end of incubation. Illumination caused buffering of Eh of tested medium. In these reactors ΔEh was 130.7 mV for 811 lx, 80.7 mV for 4866 lx and the most advantageous combination was 2433 lx where ΔEh was only 30.2 mV. In the illuminated units maximal concentration of oxygen was ~2.5% (811 lx), ~6% (2433 lx) and ~5.1% (4866 lx). The formation of N2 at about 20% for the combination of 2433 lx and 4866 lx, and about 15% for 811 lx was also observed. Respiration activity of phototrophs revealed a high level of CO2 1.3% (811 lx), while the stronger illuminations led to CO2 concentrations of only 0.5% which was connected with intense binding of this gas in the photosynthesis process. Obtained results emphasise the key role of light in anaerobic soil medium. Oxygen produced by the activity of phototrophs may indirectly affect the redox state by Eh buffering and thus prevent anaerobiosis. It also affects gas formation, which may have positive environmental consequences.

4

Anaerobic growth of Saccharomyces cerevisiae alleviates the lethal effect of phosphotyrosyl phosphatase activators depletion

72%

Rempola B., Kaniak A., Di Rago J. P., Rytka J.

Acta Biochimica Polonica

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2001

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tom 48

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nr 4

Saccharomyces cerevisiae homologues of phosphotyrosyl phosphatase activator (PTPA) are encoded by RRD1 and RRD2, genes whose combined deletion is synthetic lethal. Previously we have shown that the lethality of rrd 1,2Δ can be suppressed by increasing the osmolarity of the medium. Here we show that the lethality of rrd1,2Δ is also suppressed under oxygen-limited conditions. The absence of respiration perse is not responsible for the suppression since elimination of the mitochondrial genome or a block in heme biosynthesis fail to rescue the rrd1,2Δ double mutation.

5

Reakcja roślin w warunkach anaerobiozy

44%

Stepniewska Z., Przywara G., Bennicelli R. P.

Acta Agrophysica. Rozprawy i Monografie

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2004

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nr 7[113]

Ograniczanie wyników

1 Acta Agrophysica

1 Acta Agrophysica. Rozprawy i Monografie

1 Acta Biochimica Polonica

1 Acta Physiologiae Plantarum

1 Polish Journal of Natural Sciences. Supplement

2 Stepniewska Z.

1 Bennicelli R. P.

1 Di Rago J. P.

1 Kaniak A.

1 Kato-Noguchi H.

1 Przywara G.

1 Rempola B.

1 Rychter A. M.

1 Rytka J.

1 Szal B.

1 Tokarz E.

1 2012

1 2004

1 2003

1 2001

1 1999

Oxidative metabolism after anaerobiosis in barley [Hordeum vulgare L.] seedlings

Effect of anaerobiosis on alcohol dehydrogenase in oat seedlings

Effect of intensity introduced through optical fibres on soil redox status and gases evolution

Anaerobic growth of Saccharomyces cerevisiae alleviates the lethal effect of phosphotyrosyl phosphatase activators depletion

Reakcja roślin w warunkach anaerobiozy