Callose balancing at plasmodesmata

Shu Wei Wu, Ritesh Kumar, Arya Bagus Boedi Iswanto, Jae Yean Kim

Research output: Contribution to journalReview articlepeer-review

121 Scopus citations


In plants, communication and molecular exchanges between different cells and tissues are dependent on the apoplastic and symplastic pathways. Symplastic molecular exchanges take place through the plasmodesmata, which connect the cytoplasm of neighboring cells in a highly controlled manner. Callose, a β-1,3-glucan polysaccharide, is a plasmodesmal marker molecule that is deposited in cell walls near the neck zone of plasmodesmata and controls their permeability. During cell differentiation and plant development, and in response to diverse stresses, the level of callose in plasmodesmata is highly regulated by two antagonistic enzymes, callose synthase or glucan synthase-like and β-1,3-glucanase. The diverse modes of regulation by callose synthase and β-1,3-glucanase have been uncovered in the past decades through biochemical, molecular, genetic, and omics methods. This review highlights recent findings regarding the function of plasmodesmal callose and the molecular players involved in callose metabolism, and provides new insight into the mechanisms maintaining plasmodesmal callose homeostasis.

Original languageEnglish (US)
Pages (from-to)5325-5339
Number of pages15
JournalJournal of experimental botany
Issue number22
StatePublished - 2018
Externally publishedYes

Bibliographical note

Funding Information:
We thank InJu Park for work on the figure. This work was supported by the National Research Foundation of Korea (grants 2015R1A2A1A10053576, 2018R1A2A1A05077295, 2017R1A4A1015515 to JYK) and by a grant from the Next-Generation BioGreen 21 Program (SSAC, grant PJ01322601 to JYK), Rural Development Administration, Republic of Korea. SW, RK, and ABBI were supported by the Brain Korea 21 Plus program.

Publisher Copyright:
© The Author(s) 2018. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved.


  • 3-glucanase
  • Callose
  • Cell-to-cell communication
  • Glucan synthase-like
  • Plasmodesmata
  • Symplastic trafficking
  • β-1


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