Summary
An investigation of the fine structure of the cell wall was carried out on representative species of four morphological forms of collenchyma, viz. annular, angular, plate and lacunate. In all forms lamellae were observed in which the orientation of cellulose microfibrills was transverse. These lamellae alternated throughout the thickness of the wall with lamellae in which the orientation of cellulose microfibrils was longitudinal. The distribution of pectic substances within the wall, when stained with ruthenium red and by the alkaline hydroxylamine-ferric chloride method of Reeve (1958), was generally not observed in lamellate form although instances of lamellae with high pectic content were observed.
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The author would like to express appreciation and gratitude to Prof. A. B. Wardrop under whose direction this research was conducted and who provided numerous helpful ideas and criticisms both during the experimental work and in the compilation of the manuscript. Thanks are conveyed as well to Mr. F. J. Daniels and Mr. G. M. Harwood for technical assistance, and to Drs. D. A. Griffiths and I. A. Staff for reading the manuscript.
The project was carried out with the financial assistance of the Forest Products Research Laboratory, Ottawa, Canada. The author, who is on educational leave from this institution, wishes to express his appreciation for its support. For key to figures, see p. 14.
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Chafe, S.C. The fine structure of the collenchyma cell wall. Planta 90, 12–21 (1969). https://doi.org/10.1007/BF00389292
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DOI: https://doi.org/10.1007/BF00389292