PLANT-CELL WALL ARCHITECTURE IS REVEALED BY RAPID-FREEZING AND DEEP-ETCHING

This paper reports on preliminary investigations into the structure of cell walls of varying complexity as revealed by the rapid-freeze deep-etch technique. Three cell types from different species were examined in order to compare the three-dimensional arrangement of random, polylamellate and helicoidal walls. Each cell type displayed a distinctive level of organisation with respect to the cellulose microfibrils and the matrix material. In polylamellated walls, the microfibrils within each layer were linked to each other by 16-20 nm long side chains regularly spaced along the length of the microfibril. In helicoidal walls, the shifting of the microfibrils could clearly be seen, yet no recognisable structures were observed which could mediate this movement.