The patterns of incorporation of radioactivity from D-[U-C-14]glucose into pectins, hemicelluloses and cellulose synthesised in differentiating cells of pine root-tips were analysed after sequential solvent extractions. The percentage composition of the radioactive glycosyl residues of hot-H2O- and Na(2)EDTA- + NH4-oxalate- + NaBH4-extractable cell-wall polymers was very similar. All sections of pine roots investigated synthesise a remarkably large amount of polymers rich in,galactosyl and arabinosyl residues. These polymers may create in the wall a highly hydrated gel compartment structurally and physiologically important for the roots. The KOH-extractable polymers are rich in glucosyl and xylosyl residues.
Cell-wall biosynthesis in differentiating cells of pine root tips
PIRO, Gabriella;DALESSANDRO, Giuseppe
1998-01-01
Abstract
The patterns of incorporation of radioactivity from D-[U-C-14]glucose into pectins, hemicelluloses and cellulose synthesised in differentiating cells of pine root-tips were analysed after sequential solvent extractions. The percentage composition of the radioactive glycosyl residues of hot-H2O- and Na(2)EDTA- + NH4-oxalate- + NaBH4-extractable cell-wall polymers was very similar. All sections of pine roots investigated synthesise a remarkably large amount of polymers rich in,galactosyl and arabinosyl residues. These polymers may create in the wall a highly hydrated gel compartment structurally and physiologically important for the roots. The KOH-extractable polymers are rich in glucosyl and xylosyl residues.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
