Accession Number : AD0618162

Title :   THE ABSENCE OF ELASTIC DEFORMATION IN DRIED BENT CELLULOSE MICROFIBRILS IN PLANT CELL WALLS,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF BIOSCIENCES

Personal Author(s) : Colvin,J. Ross

Report Date : 09 NOV 1964

Pagination or Media Count : 9

Abstract : A small fraction of individual cellulose microfibrils in plant cell walls show appreciable bending along a portion of their length in a plane tangential to the cell surface. Segments of such curved microfibrils from transverse sections of Avena coleoptile epidermal or parenchyma cells do not straighten when they are freed from the constraints imposed by adjacent microfibrils, amorphous cell wall constituents, or the embedding medium. The curvature of these segments is not affected by immersion in cold water for 30 minutes, in hot water for 10 minutes, or in steam at 100 degrees for 10 minutes. The results indicate that there is no elastic deformation of bent cellulose microfibrils in dried plant cell walls. The curvature of the microfibrils in the absence of elastic deformation suggests either (a) that cellulose microfibrils may be synthesized in a bent strain-free condition or (b) that cellulose microfibrils are synthesized in a straight form, followed by elastic deformation with subsequent release of strain by recrystallization on drying. (Author)

Descriptors :   (*CELL WALL, ELASTIC PROPERTIES), (*CELLULOSE, CELL WALL), PLANTS(BOTANY), CELL STRUCTURE, MORPHOLOGY(BIOLOGY), DEFORMATION, SYNTHESIS, RECRYSTALLIZATION, CANADA

Distribution Statement : APPROVED FOR PUBLIC RELEASE