Arabidopsis thaliana root growth kinetics and lunisolar tidal acceleration.

The New Phytologist
Joachim FisahnPeter W Barlow

Abstract

• All living organisms on Earth are continually exposed to diurnal variations in the gravitational tidal force due to the Sun and Moon. • Elongation of primary roots of Arabidopsis thaliana seedlings maintained at a constant temperature was monitored for periods of up to 14 d using high temporal- and spatial-resolution video imaging. The time-course of the half-hourly elongation rates exhibited an oscillation which was maintained when the roots were placed in the free-running condition of continuous illumination. • Correlation between the root growth kinetics collected from seedlings initially raised under several light protocols but whose roots were subsequently in the free-running condition and the lunisolar tidal profiles enabled us to identify that the latter is the probable exogenous determinant of the rhythmic variation in root elongation rate. Similar observations and correlations using roots of Arabidopsis starch mutants suggest a central function of starch metabolism in the response to the lunisolar tide. The periodicity of the lunisolar tidal signal and the concomitant adjustments in root growth rate indicate that an exogenous timer exists for the modulation of root growth and development. • We propose that, in additi...Continue Reading

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Citations

Nov 28, 2013·Journal of Experimental Botany·Li-Wei HongYing-Tang Lu
Jan 27, 2018·Annals of Botany·Joachim Fisahn
Dec 22, 2012·American Journal of Botany·Gladys I CassabMaría Eugenia Campos
Sep 17, 2015·Plant Signaling & Behavior·Joachim FisahnPeter Barlow
Jan 27, 2018·Annals of Botany·Joachim Fisahn
Jun 4, 2019·Communicative & Integrative Biology·Nigel ChaffeyFrantišek Baluška
Mar 14, 2021·Nature Communications·Yangjie HuEilon Shani

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