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Callose
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| Names | |
|---|---|
| Other names
(1→3)-β-D-Glucan
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| Identifiers | |
| ChEBI | |
| Properties | |
| (C6H10O5)n | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Callose is a plant polysaccharide. Its production is due to the glucan synthase-like gene (GLS) in various places within a plant. It is produced to act as a temporary cell wall in response to stimuli such as stress or damage.[1] Callose is composed of glucose residues linked together through β-1,3-linkages, and is termed a β-glucan. It is thought to be manufactured at the cell wall by callose synthases and is degraded by β-1,3-glucanases. Callose is very important for the permeability of plasmodesmata (Pd) in plants; the plant's permeability is regulated by plasmodesmata callose (PDC). PDC is made by callose synthases and broken down by β-1,3-glucanases (BGs). The amount of callose that is built up at the plasmodesmatal neck, which is brought about by the interference of callose synthases (CalSs) and β-1,3-glucanases, determines the conductivity of the plasmodesmata.[2]
- ^ Hine R, Martin E, eds. (2016). "Callose". A Dictionary of Biology. Oxford University Press. ISBN 978-0-19-871437-8.
- ^ De Storme N, Geelen D (2014). "Callose homeostasis at plasmodesmata: molecular regulators and developmental relevance". Frontiers in Plant Science. 5: 138. doi:10.3389/fpls.2014.00138. PMC 4001042. PMID 24795733.
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