Preview
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.
Keywords: Arabidopsis; Circadian rhythm; Circumnutation; early flowering 3 (elf3); timing of cab expression 1 (toc1); CCR2, COLD CIRCADIAN RHYTHM RNA BINDING 2; elf3, early flowering 3; FFT-NLLS, fast Fourier transform-non-linear least squares; FRP, free-running period; LD, 12 h light, 12 h dark cycles; LL, constant white light condition; RAE, relative amplitude error; RT–PCR, reverse transcription–PCR; toc1, timing of cab expression1; UBQ10, UBIQUITIN10
Journal Article. 2929 words. Illustrated.
Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry
Go to Oxford Journals » abstract
Full text: subscription required
How to subscribe Recommend to my Librarian
Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.
