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Article Addendum
Symplastic domains in the Arabidopsis shoot apical meristem correlate with PDLP1 expression patterns
Emmanuelle Bayer, Carole Thomas and Andy Maule
volume 3 | issue 10
october 2008Pages: 853 - 855
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Symplastic domains in plants are defined by spatial limitations on cell-to-cell communication through plasmodesmata (Pds) and establish tissue boundaries necessary for metabolic and developmental programming. With the exception of the physical closure of Pds by callose, the cues and the processes for creating symplastic domains remain poorly understood. Recently, we identified a novel family of eight proteins, called Pd-located protein 1 (PDLP1). These proteins span the plasma membrane within Pds and likely form part of a signal transduction system that perceives external signals to regulate molecular trafficking between cells. For two members of this family that have high expression in the shoot apex we show that they have defined and partially overlapping tissue-specific expression patterns that correlate in part with previously defined symplastic domains. The importance of non-cell-autonomous proteins in shoot development and of the spatial rules that govern leaf and floral development highlight the need to have a clearer understanding of symplastic domains.
Addendum to:Thomas CL, Bayer EM, Ritzenthaler C, Fernandez-Calvino L, Maule AJ. Specific targeting of a plasmodesmal protein affecting cell-to-cell communication. PLoS Biol 2008; 6:180-90.
Authors
Emmanuelle Bayer
Norwich Research Park
Carole Thomas
Norwich Research Park
Andy Maule
Norwich Research Park