title: Circadian rhythm of circumnutation in inflorescence stems of Arabidopsis.
abstract: We investigate the modulation of circumnutation in inflorescence stems of Arabidopsis to determine the circadian regulation of circumnutation. Under constant light conditions (LL), circumnutation speed in wild-type plants fluctuates, with the phase of the highest speed at subjective dawn; the period length is close to 24 h. toc1 appears to shorten the period and elf3 causes an arrhythmic phenotype in circumnutation speed in LL, suggesting that a common circadian clock may control both circumnutation speed and other circadian outputs. These results highlight for the first time a role for a circadian clock in the regulation of circumnutation based on genetic analysis of Arabidopsis.
authors.affiliation: Plant Science Center, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa, 230-0045 Japan. s0530163@ipe.tsukuba.ac.jp
authors.forename: Kanae
authors.initials: K
authors.lastname: Niinuma
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Someya
authors.forename: Makoto
authors.initials: M
authors.lastname: Kimura
authors.forename: Isamu
authors.initials: I
authors.lastname: Yamaguchi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hamamoto
mesh_terms: D017360:Arabidopsis / Q000502:physiology*; D002940:Circadian Rhythm; D018547:Plant Stems / Q000502:physiology*