Summary
Electron diffraction patterns have been obtained from selected areas of disencrusted microfibrils isolated from the primary cell wall of cotton fibers. The resultant fiber diagram has the same meridional repeat distance as a corresponding pattern of secondary wall microfibrils but differs markedly in the equatorial reflections. The primary wall diagram displays only two strong equatorial reflections centered at 0.570 nm and 0.416 nm. The similarity of these spacings with those of cellulose IV suggests that the crystalline structure of the primary wall cellulose is similar to that of cellulose IVI and is best explained in term of native cellulose I crystals having good longitudinal coherence (i.e., coherence along the length of the microfibrils) but with poor lateral organization of the network of inter chain hydrogen bonds. Similar results were also obtained for other primary wall specimens.
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Chanzy, H., Imada, K. & Vuong, R. Electron diffraction from the primary wall of cotton fibers. Protoplasma 94, 299–306 (1978). https://doi.org/10.1007/BF01276778
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DOI: https://doi.org/10.1007/BF01276778