107. Kudlicka, K., Wardrop, A., Itoh, T., and R. M. Brown, Jr. 1987. Further evidence from sectioned material in support of a linear terminal complex in cellulose synthesis. Protoplasma 136:96-103.

107. Summary

Transmembrane linear terminal complexes considered to be involved in the synthesis of cellulose microfibrils have been described in the plasma membrane of Boergesenia forbesii. Evidence for the existence of these structures has been obtained almost exclusively using the freeze etching technique. In the present study an attempt has been made to complete these studies using conventional fixation, staining, and sectioning procedures. In developing cells of Boergesenia forbesii, strongly stained structures traversing the plasma membrane and averaging 598.9 nm 171.3 nm in length, 28.7 nm 4.2 nm in width, and 35.2nm 6.6nm in depth have been demonstrated. These structures are considered to be linear terminal complexes. At their distal (cell wall) surface, they appear to be closely associated with cellulose microfibrils. At the proximal (cytoplasmic) surface, they are associated with microtubules and polysomes. A model of the possible interrelation of the terminal complexes and microtubules leading to the generation of cell wall microfibrils is proposed.

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Last modified 27 October 2005.
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