Article (Scientific journals)
Circadian rhythms and the induction of flowering in the long-day grass Lolium temulentum L.
Périlleux, Claire; Bernier, Georges; Kinet, Jean Marie
1994In Plant, Cell and Environment, 17 (6), p. 755-761
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Abstract :
[en] Plants of Lolium temulentum L. strain Ceres were grown in 8-h short day (SD) for 45 d before being exposed either to a single long day (LD) or to a single 8-h SD given during an extended dark period. For LD induction, the critical photoperiod was between 12 and 14 h, and more than 16 h were needed for a maximal flowering response. During exposure to a single 24-h LD, the translocation of the floral stimulus began between the fourteenth and the sixteenth hours after the start of the light period, and was completed by the twenty-fourth hour. Full flowering was also induced by one 8-h SD beginning 4 or 28 h after the start of a 40-h dark period, i.e. by shifting 12 h forward or beyond the usual SD. The effectiveness of a so-called 'displaced short day' (DSD) was not affected by light quality and light intensity. With a mixture of incandescent and fluorescent lights at a total photosynthetic photon flux density of 400 µmol m-2 s-1, a 4-h light exposure beginning 4 h after the start of a 40-h dark period was sufficient to induce 100 flowering. The flower-inducing effect of a single 8-h DSD was also assessed during a 64-h dark period. Results revealed two maxima at a 20-h interval. This fluctuation in light sensitivity suggests that a circadian rhythm is involved in the control of flowering of L. temulentum.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Périlleux, Claire ;  Université de Liège - ULiège > Département des sciences de la vie > Physiologie végétale
Bernier, Georges ;  Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Kinet, Jean Marie;  Université de Liège - ULiège > Département des sciences de la vie > Physiologie végétale
Language :
English
Title :
Circadian rhythms and the induction of flowering in the long-day grass Lolium temulentum L.
Publication date :
1994
Journal title :
Plant, Cell and Environment
ISSN :
0140-7791
eISSN :
1365-3040
Publisher :
Blackwell Publishing, New York, United States - New York
Volume :
17
Issue :
6
Pages :
755-761
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRFC - Fonds de la Recherche Fondamentale Collective [BE]
ULg. ARC - Université de Liège. Actions de Recherche Concertées [BE]
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