“…However, there are numerous reports demonstrating the effectiveness of other phytohormones in reorientating cortical microtubules and spatially related microfibrils in anisotropic growth responses (e.g., Lang et al, 1982;Roberts et al, 1985;Mita and Katsumi, 1986; see R. Bergfeld, V Speth and P. Schopfer Gunning and Hardham, 1982 for older literature). Volfova et al (1977) reported on effects of gibberellin, kinetin, and lAA on parenchyma cells of wheat coleoptiles. Where investigated, these responses are related to a polylamellate appearance of the cell walls concerned.…”