| Autor: |
Noordally ZB; SynthSys, University of Edinburgh, Edinburgh, UK., Ishii K, Atkins KA, Wetherill SJ, Kusakina J, Walton EJ, Kato M, Azuma M, Tanaka K, Hanaoka M, Dodd AN |
| Jazyk: |
angličtina |
| Zdroj: |
Science (New York, N.Y.) [Science] 2013 Mar 15; Vol. 339 (6125), pp. 1316-9. |
| DOI: |
10.1126/science.1230397 |
| Abstrakt: |
Circadian timekeeping in plants increases photosynthesis and productivity. There are circadian oscillations in the abundance of many chloroplast-encoded transcripts, but it is not known how the circadian clock regulates chloroplast transcription or the photosynthetic apparatus. We show that, in Arabidopsis, nuclear-encoded SIGMA FACTOR5 (SIG5) controls circadian rhythms of transcription of several chloroplast genes, revealing one pathway by which the nuclear-encoded circadian oscillator controls rhythms of chloroplast gene expression. We also show that SIG5 mediates the circadian gating of light input to a chloroplast-encoded gene. We have identified an evolutionarily conserved mechanism that communicates circadian timing information between organelles with distinct genetic systems and have established a new level of integration between eukaryotic circadian clocks and organelles of endosymbiotic origin. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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