Phytochrome and internode elongation in Chenopodium polyspermum L. the light fluence rate during the day and the end-of-day effect |
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Authors: | A. Lecharny R. Jacques |
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Affiliation: | (1) Laboratoire du Phytotron, C.N.R.S., F-91190 Gif-sur-Yvette, France |
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Abstract: | The elongation of the fourth internode of fully green Chenopodium polyspermum L. is strongly stimulated by far-red light (FR) given at the end of the day. The end-of-day effect is more important when the plants had been cultivated for several days with a main light period of 140 Wm-2 than with a main light period of 85 Wm-2. There exists a quantitative relationship between the FR end-of-day effect mediated by phytochrome and the value of the light fluence during the day.Abbreviations D darkness - FR far-red light - HWL white light at 140 Wm-2 - LWL white light at 85 Wm-2 - PAR photosynthetically active radiation - R red light - WL white light |
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Keywords: | Chenopodium Day light fluence rate End-of-day effect Internode elongation Phytochrome |
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