Claim · model-written summary
In most plant cells the cellulose chains of each secondary wall layer form a single spiral around the cell.
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Verbatim
e0“the chief structural polysaccharide of the plant cell wall”
e5“In any one layer of the secondary walls in the majority of plant cells, the cellulose chains form a single spiral round the cell”
Title
THE MOLECULAR CHAIN STRUCTURE OF CELLULOSE AND ITS BOTANICAL SIGNIFICANCE1
R. D. PRESTON Biological reviews/Biological reviews of the Cambridge Philosophical Society 1939. doi:10.1111/j.1469-185x.1939.tb00936.x
Other claims from this paper (9)
- Observation Cellulose consists of long molecular chains with a universally 1:4 linkage.
- Observation Cellulose chains are bound together by secondary valences (van der Waals forces) into bundles.
- Observation Pectin and lignin are deposited in the intermicellar spaces, whereas xylan hemicelluloses are intramicellar.
- Observation The sign and pitch of the cellulose spiral vary widely in some cell types.
- Observation In Valonia the cellulose chains of odd and even layers lie at a considerable angle, some 83°, to each other.
- Observation In primary walls the cellulose chains form a spiral resembling that of the secondary wall.
- Recommendation The theories of wall growth based on transverse cellulose orientation in the primary wall must be abandoned.
- Mechanism Evidence points to a change in the inclination of an original spiral during growth.
- Mechanism The fundamental orienting mechanism of wall cellulose is thought to lie in the cytoplasm.