Niinuma Kanae, Someya Nobutaka, Kimura Makoto, Yamaguchi Isamu, Hamamoto Hiroshi
Plant Science Center, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa, 230-0045 Japan.
Plant Cell Physiol. 2005 Aug;46(8):1423-7. doi: 10.1093/pcp/pci127. Epub 2005 May 20.
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.
我们研究了拟南芥花序茎的回旋转头运动的调控，以确定回旋转头运动的昼夜节律调节。在持续光照条件下（LL），野生型植物的回旋转头运动速度波动，在主观黎明时速度最高；周期长度接近24小时。toc1似乎缩短了周期，而elf3在LL条件下导致回旋转头运动速度出现无节律表型，这表明一个共同的生物钟可能控制回旋转头运动速度和其他昼夜节律输出。这些结果首次基于拟南芥的遗传分析，突出了生物钟在回旋转头运动调控中的作用。
