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Annu Rev Plant Biol. 2006;57:859-75.

Microtubule dynamics and organization in the plant cortical array.

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  • 1Department of Plant Biology, Carnegie Institution, Stanford, California 94020, USA.


Live-cell studies have brought fresh insight into the organizational activities of the plant cortical array. Plant interphase arrays organize in the absence of a discrete microtubule organizing center, having plus and minus ends distributed throughout the cell cortex. Microtubule nucleation occurs at the cell cortex, frequently followed by minus-end detachment from origin sites. Microtubules associate tightly with the cell cortex, resisting lateral and axial translocation. Slow, intermitant loss of dimers from minus ends, coupled with growth-biased dynamic instability at the plus ends, results in the migration of cortically attached microtubules across the cell via polymer treadmilling. Microtubule-microtubule interactions, a direct consequence of treadmilling, result in polymer reorientation and creation of polymer bundles. The combined properties of microtubule dynamics and interactions among polymers constitute a system with predicted properties of self-organization.

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