title: Sustained microtubule treadmilling in Arabidopsis cortical arrays.
abstract: Plant cells create highly structured microtubule arrays at the cell cortex without a central organizing center to anchor the microtubule ends. In vivo imaging of individual microtubules in Arabidopsis plants revealed that new microtubules are initiated at the cell cortex and exhibit dynamics at both ends. Polymerization-biased dynamic instability at one end and slow depolymerization at the other end result in sustained microtubule migration across the cell cortex by a hybrid treadmilling mechanism. This motility causes widespread microtubule repositioning and contributes to changes in array organization through microtubule reorientation and bundling.
authors.affiliation: Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA.
authors.forename: Sidney L
authors.initials: SL
authors.lastname: Shaw
authors.forename: Roheena
authors.initials: R
authors.lastname: Kamyar
authors.forename: David W
authors.initials: DW
authors.lastname: Ehrhardt
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000502:physiology* / Q000648:ultrastructure; D001704:Biopolymers; D003595:Cytoplasmic Streaming; D036681:Fluorescence Recovery After Photobleaching; D007399:Interphase; D018613:Microscopy, Confocal; D008870:Microtubules / Q000502:physiology* / Q000648:ultrastructure; D009068:Movement; D030821:Plants, Genetically Modified; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D014404:Tubulin / Q000378:metabolism
chemical_list: D001704:Biopolymers; D011993:Recombinant Fusion Proteins; D014404:Tubulin