Abstract
The chilling stability of microtubules was investigated in root-tip cells of cucumber (Cucumis sativus L.) using immunofluorescence labeling and a confocal laser scanning microscope. After low temperature (4°C) treatment for 5 h, we found not only chilling-stable cortical microtubules under the plasma membrane of the root-tip cells, but also chilling-stable punctate microtubules in the cytoplasm, which might be the microtubules associated with organelles. 6-Dimethylaminopurine (6-DMAP), an inhibitor of protein kinase, reduced the chilling stability of the cortical microtubules in the cells. When the root-tip cells were restored to normal growth temperature (28°C), the recovery of the microtubules seemed to be closely associated with the microtubules still remaining in these cells after chilling treatment.
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Abbreviations
- 6-DMAP :
-
6-Dimethylaminopurine
- DMSO :
-
Dimethyl sulfoxide
- FITC :
-
Fluorescein isothiocyanate
- MTOCs :
-
Microtubule-organizing centers
- PPB :
-
Pre-prophase band
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Acknowledgements
This study was supported by Hebei Province Science Foundation to Hong Zhang and National Natural Science Foundation of China (No. 30170458 and 30070049) to Yan Li.
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Communicated by H. Wang
J.-L. Zhao and X.-J. Li are considered joint first authors
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Zhao, JL., Li, XJ., Zhang, H. et al. Chilling stability of microtubules in root-tip cells of cucumber. Plant Cell Rep 22, 32–37 (2003). https://doi.org/10.1007/s00299-003-0656-z
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DOI: https://doi.org/10.1007/s00299-003-0656-z