Signals and prepatterns: new insights into organ polarity in plants

Husbands, A. Y., Chitwood, D. H., Plavskin, Y., Timmermans, M. C. P. (September 2009) Signals and prepatterns: new insights into organ polarity in plants. Genes and Development, 23 (17). pp. 1986-97. ISSN 08909369 (ISSN)

DOI: 10.1101/gad.1819909


The flattening of leaves results from the interaction between upper (adaxial) and lower (abaxial) domains in the developing primordium. These domains are specified by conserved, overlapping genetic pathways involving several distinct transcription factor families and small regulatory RNAs. Polarity determinants employ a series of antagonistic interactions to produce mutually exclusive cell fates whose positioning is likely refined by signaling across the adaxial-abaxial boundary. Signaling candidates include a mobile small RNA-the first positional signal described in adaxial-abaxial polarity. Possible mechanisms to polarize the incipient primordium are discussed, including meristem-derived signaling and a model in which a polarized organogenic zone prepatterns the adaxial-abaxial axis.

Item Type: Paper
Uncontrolled Keywords: Angiosperms/genetics/growth & development/*physiology Body Patterning/genetics/*physiology Gene Expression Regulation, Plant Genes, Plant/genetics/*physiology Homeodomain Proteins/genetics/metabolism Leucine Zippers/genetics MicroRNAs/metabolism Plant Leaves/growth & development/metabolism/*physiology RNA, Plant/metabolism *Signal Transduction Trans-Activators/genetics/metabolism
Subjects: organism description > plant
organism description > plant behavior > plant orientation
organism description > plant behavior > plant orientation > plant polarity
CSHL Authors:
Communities: CSHL Post Doctoral Fellows
CSHL labs > Timmermans lab
School of Biological Sciences > Publications
Depositing User: Matt Covey
Date: 1 September 2009
Date Deposited: 20 Feb 2013 15:06
Last Modified: 22 Sep 2014 18:28
PMCID: PMC2751976
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