Root contraction in hyacinth III. Orientation of cortical microtubules visualized by immunofluorescence microscopy
Protoplasma, ISSN: 0033-183X, Vol: 151, Issue: 1, Page: 1-10
1989
- 15Citations
- 1Captures
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Article Description
Cortical microtubules (MTs) were visualized in root cortex cells of Hyacinthus orientalis L. using immunofluorescence techniques. Cellular MT orientation was determined adjacent to radial longitudinal and transverse walls of root tip, uncontracted, contracting, and fully contracted regions. As seen in longitudinal views, MTs formed parallel, apparently helical arrays which were oriented transversely, axially or obliquely depending upon the region. Transverse sectional views showed that MTs adjacent to transverse cell walls formed a variety of patterns which varied with developmental stage and cell location. Microtubules were oriented in crisscross or parallel arrays. The parallel arrays were oriented either parallel, perpendicular or oblique to the radius of the root. There was an apparent temporal progression in MT reorientation from outer cortical to inner cortical cell layers. A resultant progression of reoriented cell growth could account for root contraction. These findings corroborate earlier electron microscopic observations of changing MT orientation accompanying root contraction, and provide cytological evidence to test mathematical and biophysical models of the mechanics of cell expansion. © 1989 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0002389205&origin=inward; http://dx.doi.org/10.1007/bf01403296; http://link.springer.com/10.1007/BF01403296; http://link.springer.com/content/pdf/10.1007/BF01403296; http://link.springer.com/content/pdf/10.1007/BF01403296.pdf; http://link.springer.com/article/10.1007/BF01403296/fulltext.html; http://www.springerlink.com/index/pdf/10.1007/BF01403296; http://www.springerlink.com/index/10.1007/BF01403296; https://dx.doi.org/10.1007/bf01403296; https://link.springer.com/article/10.1007/BF01403296
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