The Circadian Clock in Arabidopsis Roots Is a Simplified Slave Version of the Clock in Shoots

被引：204

作者：

James, Allan B. ^{[1
]}

Monreal, Jose A. ^{[1
]}

Nimmo, Gillian A. ^{[1
]}

Kelly, Ciaran L. ^{[1
]}

Herzyk, Pawel ^{[2
,3
]}

Jenkins, Gareth I. ^{[1
]}

Nimmo, Hugh G. ^{[1
]}

机构：

[1] Univ Glasgow, Fac Biomed & Life Sci, Div Mol & Cellular Biol, Glasgow G12 8QQ, Lanark, Scotland

[2] Univ Glasgow, Fac Biomed & Life Sci, Div Integrated Biol, Glasgow G12 8QQ, Lanark, Scotland

[3] Univ Glasgow, Fac Biomed & Life Sci, Sir Henry Wellcome Funct Genom Facil, Glasgow G12 8QQ, Lanark, Scotland

来源：

SCIENCE | 2008年 / 322卷 / 5909期

关键词：

D O I：

10.1126/science.1161403

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The circadian oscillator in eukaryotes consists of several interlocking feedback loops through which the expression of clock genes is controlled. It is generally assumed that all plant cells contain essentially identical and cell- autonomous multiloop clocks. Here, we show that the circadian clock in the roots of mature Arabidopsis plants differs markedly from that in the shoots and that the root clock is synchronized by a photosynthesis- related signal from the shoot. Two of the feedback loops of the plant circadian clock are disengaged in roots, because two key clock components, the transcription factors CCA1 and LHY, are able to inhibit gene expression in shoots but not in roots. Thus, the plant clock is organ- specific but not organ- autonomous.

引用

页码：1832 / 1835

页数：4

共 28 条

[1] Critical role for CCA1 and LHY in maintaining circadian rhythmicity in Arabidopsis [J].