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Visualization of cellulose synthases in Arabidopsis secondary cell walls
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Visualization of cellulose synthases in Arabidopsis secondary cell walls
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Journal Article
Visualization of cellulose synthases in Arabidopsis secondary cell walls
2015
Overview
Cellulose biosynthesis in plant secondary cell walls forms the basis of vascular development in land plants, with xylem tissues constituting the vast majority of terrestrial biomass. We used plant lines that contained an inducible master transcription factor controlling xylem cell fate to quantitatively image fluorescently tagged cellulose synthase enzymes during cellulose deposition in living protoxylem cells. The formation of secondary cell wall thickenings was associated with a redistribution and enrichment of CESA7-containing cellulose synthase complexes (CSCs) into narrow membrane domains. The velocities of secondary cell wall–specific CSCs were faster than those of primary cell wall CSCs during abundant cellulose production. Dynamic intracellular trafficking of endomembranes in combination with increased velocity and high density of CSCs, enables cellulose to be synthesized rapidly in secondary cell walls.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
/ Arabidopsis - growth & development
/ Arabidopsis Proteins - analysis
/ Arabidopsis Proteins - chemistry
/ Arabidopsis Proteins - metabolism
/ Bacterial Proteins - analysis
/ Biofuels
/ Biomass
/ Enzymes
/ Glucosyltransferases - analysis
/ Glucosyltransferases - chemistry
/ Glucosyltransferases - metabolism
/ Golgi Apparatus - enzymology
/ Luminescent Proteins - analysis
/ Walls
/ Wood
