Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Organ / tissue: hypocotyl,
cell wall
NCBI PubMed ID: 16668092Journal NLM ID: 0401224Publisher: American Society of Plant Biologists
Institutions: Biological Laboratory, Faculty of Education, Kagawa University, Takamatsu 760, Japan
Effects of indole-3-acetic acid (IAA) on the mechanical properties of cell walls and structures of cell wall polysaccharides in outer and inner tissues of segments of dark grown squash (Cucurbita maxima Duch.) hypocotyls were investigated. IAA induced the elongation of unpeeled, intact segments, but had no effect on the elongation of peeled segments. IAA induced the cell wall loosening in outer tissues as studied by the stress-relaxation analysis but not in inner tissues. IAA-induced changes in the net sugar content of cell wall fractions in outer and inner tissues were very small. Extracted hemicellulosic xyloglucans derived from outer tissues had a molecular weight about two times as large as in inner tissues, and the molecular weight of xyloglucans in both outer and inner tissues decreased during incubation. IAA substantially accelerated the depolymerization of xyloglucans in outer tissues, while it prevented that in inner tissues. These results suggest that IAA-induced growth in intact segments is due to the cell wall loosening in outer tissues, and that IAA-accelerated depolymerization of hemicellulosic xyloglucans in outer tissues is involved in the cell wall loosening processes.
Structure type: homopolymer
Trivial name: cellulose, β-(1,4)-glucan, cellulose, β-(1,4)-glucan
Compound class: EPS, O-polysaccharide, cell wall polysaccharide, glucan, polysaccharide
Contained glycoepitopes: IEDB_142488,IEDB_146664,IEDB_983931,SB_192
Comments, role: Parent molecule: cellulose
NCBI Taxonomy refs (TaxIDs): 3661Reference(s) to other database(s): GTC:G75830OM, GlycomeDB:
27885, CCSD:
50051, CBank-STR:4229
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
report error