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Hemmung der Blütenbildung von Lemna gibba durch Ammonium

Inhibition of flowering in Lemna gibba by ammonium ions

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Summary

Ammonium ions completely inhibit the flowering of Lemna gibba G1 and G3 without a simultaneous effect on the growth and multiplication of fronds. A concentration of 10-4 M NH +4 is effective in strain G3.

The NH +4 -inhibition of flowering is reversed by ATP and, more effectively, by ADP.

With reference to recent literature the opinion is confirmed that ammonium ions cause a decrease of the ATP available in relation to the level of NAD(P)H and as a consequence flowering is inhibited. Possible primary actions of ammonium ions are the uncoupling of photophosphorylation, the repression of nitrate- and nitrite-reductase and the increase of NH +4 -detoxication processes.

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  1. Botanisches Institut I der Universität Würzburg, Wüzburg, Deutschlands

    Riklef Kandeler

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  1. Riklef Kandeler
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Kandeler, R. Hemmung der Blütenbildung von Lemna gibba durch Ammonium. Planta 84, 279–291 (1969). https://doi.org/10.1007/BF00388114

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  • DOI: https://doi.org/10.1007/BF00388114

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