NDLI: Establishment of Polarity during Organization of the Acentrosomal Plant Cortical Microtubule ArrayD⃞V⃞

Content Provider	PubMed Central
Author	Dixit, Ram Chang, Eric Cyr, Richard
Editor	Mcintosh, J. Richard
Copyright Year	2006
Abstract	The plant cortical microtubule array is a unique acentrosomal array that is essential for plant morphogenesis. To understand how this array is organized, we exploited the microtubule (+)-end tracking activity of two Arabidopsis EB1 proteins in combination with FRAP (fluorescence recovery after photobleaching) experiments of GFP-tubulin to examine the relationship between cortical microtubule array organization and polarity. Significantly, our observations show that the majority of cortical microtubules in ordered arrays, within a particular cell, face the same direction in both Arabidopsis plants and cultured tobacco cells. We determined that this polar microtubule coalignment is at least partially due to a selective stabilization of microtubules, and not due to a change in microtubule polymerization rates. Finally, we show that polar microtubule coalignment occurs in conjunction with parallel grouping of cortical microtubules and that cortical array polarity is progressively enhanced during array organization. These observations reveal a novel aspect of plant cortical microtubule array organization and suggest that selective stabilization of dynamic cortical microtubules plays a predominant role in the self-organization of cortical arrays.
Related Links	http://dx.doi.org/10.1091/mbc.e05-09-0864
Ending Page	1305
Page Count	8
Starting Page	1298
File Format	PDF
ISSN	10591524
Journal	Molecular Biology of the Cell
Issue Number	3
Volume Number	17
Language	English
Publisher	The American Society for Cell Biology
Publisher Date	2005-12-01
Access Restriction	Open
Rights Holder	The American Society for Cell Biology
Subject Keyword	Cell Biology Molecular Biology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Molecular Biology

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