Getrennete Röntgenbestrahlung von Lamellaren Strukturelementen und Enzymextrakten Isolierter Chloroplasten und Ihre Wirkung auf die Lichtäbhangige TPN-Reduktion

Füchtbauer, W.; Simonis, W.

doi:10.1016/s0033-7560(62)80120-3

Cited by 7 publications

(1 citation statement)

References 38 publications

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“…Then they were X-irradiated in the dark in a concentrated suspension (100 ,ug chlorophyll/ml) in a phosphate-free buffered solution at 250 at a dose rate of 3000 rad/min (140 kv, 12 ma). For details of the irradiation apparatuis see references (5,6). Control samples were kept in the apparatus behind a lead shield.…”

Section: Methodsmentioning

confidence: 99%

Incorporation of ³²P and ¹⁴C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

1967

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Sunmtmary. The incorporation of 32p and 1"C into organic compounds by Ankistrodesmitus is strongly inhibited by X-rays. In the same phosphorylated compounds 39P-incorporation apparently is more severely inhibited by X-rays than the "4C-labelling. The 32P-incorporation into organic compounds is more strongly inhibited than 3"P-labelling of inorganic phosphate in the cell. The inhibition of 32P-incorporation into a number of compounds is strikingly tuniform. It is concluided that the inhibition of "P-incorporation and of _4C-incorporation into phosphorylated compounds in vivo is due to an uncoupling by X-rays of photophosphorylation as in vitro. The difference in X-ray sensitivity of 14C-and "2P-incorporation into one organic phosphorous compound is attributed to a dual action of X-rays on "P-incorporation in organic compounds (both via the uncoupling of photophosphorylation) and only a single effect on 14C-incorporation and 32P-labelling of inorganic phosphate. The effect of X-rays on 14C-incorporation into organic compounds included inhibition in most cases but also stimulation as in the case of glycolic acid. These differences may be due to interference in the intercellular regulations following the application of X-rays. The inhibition of 14C-incorporation in many cases exhibits different behaviour at low (<200 krad) and high doses. These chaiiges are (liscussecd on the assuimption that at the lower doses X-rays cause uncoupling of photophosphorylation and at the higher doses an additional inhibition of electron transport.

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Section: Methodsmentioning

confidence: 99%

Incorporation of ³²P and ¹⁴C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

1967

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Physik der Photosynthese

Dessauer¹

1964

Quantenbiologie

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Hohe Strahlenresistenz der Aktivit�t und der lichtinduzierten Aktivit�tssteigerung der NADP-abh�ngigen Glycerinaldehyd-3-Phosphat-Dehydrogenase in Ankistrodesmus braunii

Seuberling

1971

Planta

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In Ankistrodesmus braunii, a unicellular alga, the activity of NADP-dependent glyceraldehyde phosphate dehydrogenase (GPD) in darkness is very resistant to X-rays. The light-induced increase in the activity of this enzyme within one minute is also not affected by irradiation. Doses up to 1060 Krad had no inhibitory effect. The increase of GPD activity during the life cycle, however, is very sensitive to X-rays.

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Getrennete Röntgenbestrahlung von Lamellaren Strukturelementen und Enzymextrakten Isolierter Chloroplasten und Ihre Wirkung auf die Lichtäbhangige TPN-Reduktion

Cited by 7 publications

References 38 publications

Incorporation of ³²P and ¹⁴C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

Incorporation of ³²P and ¹⁴C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

Physik der Photosynthese

Hohe Strahlenresistenz der Aktivit�t und der lichtinduzierten Aktivit�tssteigerung der NADP-abh�ngigen Glycerinaldehyd-3-Phosphat-Dehydrogenase in Ankistrodesmus braunii

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Getrennete Röntgenbestrahlung von Lamellaren Strukturelementen und Enzymextrakten Isolierter Chloroplasten und Ihre Wirkung auf die Lichtäbhangige TPN-Reduktion

Cited by 7 publications

References 38 publications

Incorporation of 32P and 14C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

Incorporation of 32P and 14C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

Physik der Photosynthese

Hohe Strahlenresistenz der Aktivit�t und der lichtinduzierten Aktivit�tssteigerung der NADP-abh�ngigen Glycerinaldehyd-3-Phosphat-Dehydrogenase in Ankistrodesmus braunii

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Incorporation of ³²P and ¹⁴C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays

Incorporation of ³²P and ¹⁴C into Photosynthetic Products of Ankistrodesmus braunii as Affected by X-Rays