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Week-long imaging of cell divisions in the Arabidopsis root meristem

Ramin Rahni, Kenneth D. Birnbaum
doi: https://doi.org/10.1101/268102
Ramin Rahni
1Center for Genomics and Systems Biology, Department of Biology, New York University, 12 Waverly Place, New York, NY 10003, USA
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Kenneth D. Birnbaum
1Center for Genomics and Systems Biology, Department of Biology, New York University, 12 Waverly Place, New York, NY 10003, USA
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Abstract

Characterizing the behaviors of dynamic systems requires capturing them with high temporal and spatial resolution. Owing to its transparency and genetic tractability, the Arabidopsis thaliana root lends itself well to live imaging when combined with cell and tissue-specific fluorescent reporters. We developed a novel 4D imaging method that utilizes simple confocal microscopy and readily available components to track cell divisions in the root stem cell niche and surrounding region for up to one week. This new setup allows us to finely analyze meristematic cell division rates that lead to patterning. Using this method, we performed a direct measurement of cell division intervals within and around the root stem cell niche. The results reveal a short, steep gradient of cell division in proximal stem cells, with progressively more rapid cell division rates from QC, to cells in direct contact with the QC (initials), to their immediate daughters, after which division rates appear to become more homogeneous. These results provide a baseline to study how perturbations in signaling could affect cell division patterns in the root meristem.

Footnotes

  • One sentence summary: A simple live imaging method using confocal microscopy and off-the-shelf components reveals cell-specific division patterns in the Arabidopsis root meristem over one week.

  • Funding information: The work was funded by NIH Grant R01-GM078279.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted May 31, 2018.
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Week-long imaging of cell divisions in the Arabidopsis root meristem
Ramin Rahni, Kenneth D. Birnbaum
bioRxiv 268102; doi: https://doi.org/10.1101/268102
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Week-long imaging of cell divisions in the Arabidopsis root meristem
Ramin Rahni, Kenneth D. Birnbaum
bioRxiv 268102; doi: https://doi.org/10.1101/268102

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