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Scientific article
English

Arabidopsis thaliana floral stem elongation: Evidence for an endogenous circadian rhythm

Published inPlant physiology and biochemistry, vol. 36, p. 469-472
Publication date1998
Abstract

The floral stem elongation of Arabidopsis thaliana, Landsberg erecta ecotype, was studied with a plant growth­measuring apparatus using linear voltage differential transformers as sensors. Elongation rate displayed a clear rhythm which could be synchronized by a L:D (12:12) or L:D (7:7) photoperiod. The rhythm persisted afterwards in continuous constant conditions (CL). When pre-synchronization was L:D (12:12), the period in CL was 23.5 h. After L:D (7:7) synchronization (equal light/dark photoperiod which was not in phase with the 24 h daily period) a period of 21.4 h was measured in CL. Moreover, this later treatment triggered a significant increase in the first internode length. Thus, these results showed clearly that the floral stem growth was under the control of an endogenous circadian rhythm

Keywords
  • Arabidopsis thaliana
  • Floral stem elongation rate
  • Photoperiod
  • Circadian rhythm
Citation (ISO format)
JOUVE, Laurent, GREPPIN, Hubert, DEGLI AGOSTI, Robert. Arabidopsis thaliana floral stem elongation: Evidence for an endogenous circadian rhythm. In: Plant physiology and biochemistry, 1998, vol. 36, p. 469–472. doi: 10.1016/S0981-9428(98)80212-X
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ISSN of the journal0981-9428
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