Chemistry of developing bordered-pit rims in balsam-fir trees
| Autor: | Rodney A. Savidge |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Balsam Ecology biology Chemistry Plant Science biology.organism_classification 01 natural sciences 03 medical and health sciences 030104 developmental biology Botany Cambium Ecology Evolution Behavior and Systematics 010606 plant biology & botany Abies balsamea |
| Zdroj: | Botany. 94:347-357 |
| ISSN: | 1916-2804 1916-2790 |
| DOI: | 10.1139/cjb-2016-0002 |
| Popis: | Rims of bordered pits form on the primary walls of radially enlarged cambial derivatives prior to the onset of general secondary-wall formation. A recent report (Botany, 2014, 92(7): 495–511) raised the possibility that the chemical composition of the rim might be different from that of the secondary wall. To investigate this, early-stage nonfluorescent and late-stage autofluorescent rims were separated from cambial derivatives of Abies balsamea (L.) Mill. and purified to homogeneity by density-gradient centrifugation. Solid state nuclear magnetic resonance spectroscopy, Raman microspectroscopy, combined gas chromatography – mass spectroscopy, enzyme digestion, and chemical resilience data support the interpretation that cellulose alone is the microfibrillar polysaccharide of nonfluorescent early-stage rims. A lignin is additionally present in late-stage rims, and it evidently bonds with cellulose because rims are extraordinarily resistant to hydrolysis by either enzymes or strong acid. |
| Databáze: | OpenAIRE |
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