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Maintenance of asymmetric cellular localization of an auxin transport protein through interaction with the actin cytoskeletonIn shoots, polar auxin transport is basipetal (that is, from the shoot apex toward the base) and is driven by the basal localization of the auxin efflux carrier complex. The focus of this article is to summarize the experiments that have examined how the asymmetric distribution of this protein complex is controlled and the significance of this polar distribution. Experimental evidence suggests that asymmetries in the auxin efflux carrier may be established through localized secretion of Golgi vesicles, whereas an attachment of a subunit of the efflux carrier to the actin cytoskeleton may maintain this localization. In addition, the idea that this localization of the efflux carrier may control both the polarity of auxin movement and more globally regulate developmental polarity is explored. Finally, evidence indicating that the gravity vector controls auxin transport polarity is summarized and possible mechanisms for the environmentally induced changes in auxin transport polarity are discussed.
Document ID
Document Type
Reprint (Version printed in journal)
Muday, G. K.
(Wake Forest University Winston-Salem, North Carolina 27109-7325, United States)
Date Acquired
August 21, 2013
Publication Date
December 1, 2000
Publication Information
Publication: Journal of plant growth regulation
Volume: 19
Issue: 4
ISSN: 0721-7595
Subject Category
Life Sciences (General)
Funding Number(s)
Distribution Limits
Non-NASA Center
NASA Discipline Plant Biology
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