PHOTOBIOLOGIE DU MÉSOCOTYLE D'AVOINE—II. STIMULATION DE L'ÉLONGATION PAR LA LUMIÈRE ROUGE-SOMBRE EN PRÉSENCE DE DIVERSES GIBBÉRELLINES |
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| Authors: | M Sandmeier J P Nitsch |
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| Institution: | Laboratoire du Phytotron, C.N.R.S., Gif-sur-Yvette (S. et O.), France |
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| Abstract: | Abstract— Far-red light has the property of promoting the elongation of Avena mesocotyl sections in the presence of a gibberellin. Part of this effect is not reversible by red light (around 655 mμ ). The wavelengths which are most effective are those in the neignbourhood of 720 mμ , as revealed by the action spectrum. Amongst the 8 gibberellins tested, only A1, A3, and A9, are capable of producing, after far-red irradiation, a greater elongation than the one they cause in the dark. |
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