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Cellulose fibril orientation and the direction of cell expansion
Kerstens and Verbelen (pp. 669-676) examine root cells in 57 angiosperm species from 29 families and show that transverse orientation of cellulose fibrils is not always linked to longitudinal cell elongation. In the Poaceae, Juncaceae and Cyperaceae, fibrils are found parallel to the direction of growth. Differences in fibril orientation patterns may be useful in biosystematics.
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