Abstract
THE increasing scrutiny of the bordered-pit membrane with the light and electron microscopes has resulted in many significant and noteworthy facts about the phytotomy and organization of this important structure. In recent years, however, apparent inconsistencies have been recorded even to the point that the torus of the bordered pit membrane is non-existent and is an artefact, the resultant of retreating water in the tracheids1. The discordant results may indicate structural differences not only of different species but of heteromorphic variations within the same tracheid or adjacent tracheids2.
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SACHS, I. Torus of the Bordered-pit Membrane in Conifers. Nature 198, 906–907 (1963). https://doi.org/10.1038/198906a0
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DOI: https://doi.org/10.1038/198906a0
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