1970
DOI: 10.1007/bf00388047
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Die Wirkung von Lithium und ADP auf die Phytochromsteuerung der Bl�tenbildung

Abstract: Lithium seems to diminish the action of phytochrome on the flower induction: under long-day conditions 10(-3) M LiCl inhibits flower production in the long-day plant Lemna gibba Gl. However, under the same conditions flowering in the short-day plant Lemna perpusilla 6746 is stimulated by 10(-3) M LiCl.ADP seems to enhance the action of phytochrome on flower induction: under long-day conditions 10(-4) M ADP promotes the flowering in Lemna gibba G1 (Kandeler, 1969a, b). However, it inhibits flowering in Lemna pe… Show more

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Cited by 36 publications
(12 citation statements)
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“…
'the unique advantages of the Lemnaceae (duckweeds) as experimental organisms include the ease with which flowering can be affected by changes in the composition of the medium (4,5,(7)(8)(9)(10)(11)(12)(13). This characteristic becomes particularly important as these plants are increasingly employed not only in studies of photoperiodism, but also as assay systems for preparations having florigenic activity (e.g., 2).

Posner (12,13) The results of two experiments comparing various concentrations of Hutner's and KNO3 media are summarized in Table I; they indicate clearly that the inhibition caused by progressively diluting Hutner's medium under these conditions cannot be observed in KNO3 medium.

…”
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“…
'the unique advantages of the Lemnaceae (duckweeds) as experimental organisms include the ease with which flowering can be affected by changes in the composition of the medium (4,5,(7)(8)(9)(10)(11)(12)(13). This characteristic becomes particularly important as these plants are increasingly employed not only in studies of photoperiodism, but also as assay systems for preparations having florigenic activity (e.g., 2).

Posner (12,13) The results of two experiments comparing various concentrations of Hutner's and KNO3 media are summarized in Table I; they indicate clearly that the inhibition caused by progressively diluting Hutner's medium under these conditions cannot be observed in KNO3 medium.

…”
mentioning
confidence: 99%
“…Such results suggest that some or all of the substances under consideration may act by modifying the leaching of active materials from the growing plants through effects on the permeability and integrity of membranes. In this hypothesis it would be from the nature of such materials, rather than through special features of general metabolism, that the surprisingly specific actions of ammonium, sugars, calcium, phosphate, and many other substances (4,5,(7)(8)(9)(10)(11)(12)(13) would arise.Unlike the effects of photoperiod or cupric ion, the inhibition of flowering in L. perpusilla by sucrose in dilute medium is extremely variable. On some occasions it has appeared, disappeared, and then reappeared in a series of experiments under apparently constant conditions.…”
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“…Lemna perpusilla is a convenient organism in which to study this problem since it is a short day plant (10), and its photoperiodic time measurement appears to be controlled by a circadian rhythm (7) which can be correlated to an overt circadian rhythm of CO2 output (11). In addition, the composition of the defined medium on which the plant is grown modifies or controls its flowering response to photoperiod (6,10,13). This paper reports the effects of periodic transfer to distilled water on photoperiodically controlled flowering in L.…”
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confidence: 99%