THE INDUCTION OF FLOWERING IN NICOTIANA. I. MORPHOLOGICAL DEVELOPMENT OF THE APEX |
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| Authors: | L Waterkeyn P Martens J P Nitsch |
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| Institution: | Institut Carnoy, University of Louvain, Belgium
Laboratoire du Phytotron, Gif-sur-Yvette, France |
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| Abstract: | The morphological changes which the stem apex undergoes in the course of photoperiodic induction are described and presented photographically in order to provide a basis for subsequent physiological investigations. In both a short-day Nicotiana (N. tabacum cultivar ‘Maryland Mammoth') and a long-day one (N. sylvestris), the vegetative meristem is narrow and flat. It becomes wider and dome-shaped when flower induction has become irreversible. The speed at which the various morphological steps succeed each other varies with the intensity of light during the day, especially in the case of N. sylvestris. |
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