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

Published in Plant Physiology and Biochemistry. 1998, vol. 36, p. 469-472
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 thalianaFloral stem elongation ratePhotoperiodCircadian rhythm
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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 https://archive-ouverte.unige.ch/unige:42741

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Deposited on : 2014-12-08

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