Journal
PLANT SIGNALING & BEHAVIOR
Volume 4, Issue 6, Pages 489-492Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.4.6.8359
Keywords
Arabidopsis thaliana; callose; callose synthase; glucan synthase-like; pollen; plasmodesmata; cell plate; stress
Categories
Funding
- KOSEF/MEST [2009-0066339]
- WCU [R33-2008-000-10002-0]
- Environmental Biotechnology National Core Research Center [R15-2003-01201003-0]
- BK21 program
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Callose is a polysaccharide in the form of beta-1,3-glucan with some beta-1,6-branches and it exists in the cell walls of a wide variety of higher plants. Callose plays important roles during a variety of processes in plant development and/or in response to multiple biotic and abiotic stresses. It is now generally believed that callose is produced by callose synthases and that it is degraded by beta-1,3-glucanases. Despite the importance of callose in plants, we have only recently begun to elucidate the molecular mechanism of its synthesis. Molecular and genetic studies in Arabidopsis have identified a set of genes that are involved in the biosynthesis and degradation of callose. In this mini-review, we highlight recent progress in understanding callose biosynthesis and degradation and discuss the future challenges of unraveling the mechanism(s) by which callose synthase operate.
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