Different circadian oscillators control Ca <sup>2+</sup> fluxes and <i>Lhcb</i> gene expression
-
- Jiqing Sai
- Department of Biology, Box 1812-B, Vanderbilt University, Nashville, TN 37235
-
- Carl Hirschie Johnson
- Department of Biology, Box 1812-B, Vanderbilt University, Nashville, TN 37235
説明
<jats:p> Circadian biological clocks control many biological events, but the pathways by which these events are controlled are largely unknown. Based on a model suggesting that cytosolic-free calcium levels control the expression of the <jats:italic>Lhcb</jats:italic> gene in plants, we tested whether the circadian oscillation of free calcium is responsible for driving the rhythm of <jats:italic>Lhcb</jats:italic> expression. We found that these rhythms free-run with different periods in tobacco seedlings in constant conditions. Moreover, robust oscillations of <jats:italic>Lhcb</jats:italic> promoter activity continued in undifferentiated tobacco calli in the absence of Ca <jats:sup>2+</jats:sup> oscillations. Therefore, these two circadian rhythms are not linked hierarchically. These data provide evidence for separate circadian pacemakers controlling molecular events in plants. </jats:p>
収録刊行物
-
- Proceedings of the National Academy of Sciences
-
Proceedings of the National Academy of Sciences 96 (20), 11659-11663, 1999-09-28
Proceedings of the National Academy of Sciences
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1362544420089691008
-
- NII論文ID
- 30016226070
-
- ISSN
- 10916490
- 00278424
-
- データソース種別
-
- Crossref
- CiNii Articles