Genetic oscillations. A Doppler effect in embryonic pattern formation.
Genetic oscillations. A Doppler effect in embryonic pattern formation.
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DOI:
10.1126/science.1253089
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发表时间:
2014-07-11
期刊:
影响因子:
--
通讯作者:
Oates AC
中科院分区:
文献类型:
--
作者:
Soroldoni D;Jörg DJ;Morelli LG;Richmond DL;Schindelin J;Jülicher F;Oates AC
During embryonic development, temporal and spatial cues are coordinated to generate a segmented body axis. In sequentially segmenting animals, the rhythm of segmentation is reported to be controlled by the time-scale of genetic oscillations that periodically trigger new segment formation. However, we present real-time measurements of genetic oscillations in zebrafish embryos showing that their time-scale is not sufficient to explain the temporal period of segmentation. A second time-scale, the rate of tissue shortening, contributes to the period of segmentation through a Doppler effect. This contribution is modulated by a gradual change in the oscillation profile across the tissue. We conclude that the rhythm of segmentation is an emergent property controlled by the time-scale of genetic oscillations, the change of oscillation profile, and tissue shortening.
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