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Etude de l’influence de l’acide gibbérellique (GA3) et de l’acide N- diméthylamino- succinamique (B9) sur la croissance et la floraison de laScrophularia vernalis L.

Growth and flowering ofScrophularia vernalis L. after treatments with gibberellic acid (GA3) and N-dimethylamine-succinamic acid (B9)

  • Published:
Biologia Plantarum

Abstract

In this report, B9 treatment had no effect on the growing of rosette biennialScrophularia vernalis L.; it inhibited or slowed stem elongation. Applications of GA3 to B9 treated plants produced a significant increase of stem elongation, in relation to GA3 treated plants. Plants treated with only GA3 failed to flower; otherwise, the flowering of vernalized plants was not altered by GA3. Thus, B9 effect on flowering was tested by using GA3. B9 by itself induced flowering, it increased inflorescence formation in vernalized plants without altering stem growth pattern in the most of cases. The induction or the stimulation of flowering brought about by B9 was not reversed by GA3; we may thus hypothesize that flowering by B9 oannot be traced back to gibberellin biosynthesis.

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  1. Laboratoire du Phytotron, Centre National de la Recherche Scientifique, 91190, Gif-sur-Yvette, France

    Florence Bismuth & Christiane Larrieu

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  1. Florence Bismuth
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  2. Christiane Larrieu
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Bismuth, F., Larrieu, C. Etude de l’influence de l’acide gibbérellique (GA3) et de l’acide N- diméthylamino- succinamique (B9) sur la croissance et la floraison de laScrophularia vernalis L.. Biol Plant 20, 335–343 (1978). https://doi.org/10.1007/BF02923324

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