Journal Article

Plasmodesmata in integrated cell signalling: insights from development and environmental signals and stresses

Ross Sager and Jung-Youn Lee

in Journal of Experimental Botany

Volume 65, issue 22, pages 6337-6358
Published in print December 2014 | ISSN: 0022-0957
Published online September 2014 | e-ISSN: 1460-2431 | DOI: https://dx.doi.org/10.1093/jxb/eru365
Plasmodesmata in integrated cell signalling: insights from development and environmental signals and stresses

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To survive as sedentary organisms built of immobile cells, plants require an effective intercellular communication system, both locally between neighbouring cells within each tissue and systemically across distantly located organs. Such a system enables cells to coordinate their intracellular activities and produce concerted responses to internal and external stimuli. Plasmodesmata, membrane-lined intercellular channels, are essential for direct cell-to-cell communication involving exchange of diffusible factors, including signalling and information molecules. Recent advances corroborate that plasmodesmata are not passive but rather highly dynamic channels, in that their density in the cell walls and gating activities are tightly linked to developmental and physiological processes. Moreover, it is becoming clear that specific hormonal signalling pathways play crucial roles in relaying primary cellular signals to plasmodesmata. In this review, we examine a number of studies in which plasmodesmal structure, occurrence, and/or permeability responses are found to be altered upon given cellular or environmental signals, and discuss common themes illustrating how plasmodesmal regulation is integrated into specific cellular signalling pathways.

Keywords: Plasmodesmata; cell-to-cell communication; development; environmental stresses; biotic and abiotic stress; hormones; cell signalling; callose.

Journal Article.  18192 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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