Summary
InZinnia suspension cultures, two general categories of tracheary element (TE) secondary wall patterns can be distinguished: bands and webs. Band patterns are found in elongated cells or regions of cells, web patterns in isodiametric cells or regions of cells. Interphase cortical microtubule arrays, organized before overt differentiation occurs, determine both the shape of the cell and whether band or web patterns will be deposited at the time of TE formation. By altering cell shape and consequently also altering the interphase microtubule array, it is possible to control the type of wall pattern which is deposited.
These results provide support for the hypothesis which states that the organization of interphase cortical microtubule arrays (i.e., random or parallel), which laterally associate during tracheary element differentiation, determines the pattern in which secondary walls will be deposited.
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Falconer, M.M., Seagull, R.W. Xylogenesis in tissue culture II: Microtubules, cell shape and secondary wall patterns. Protoplasma 133, 140–148 (1986). https://doi.org/10.1007/BF01304629
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DOI: https://doi.org/10.1007/BF01304629