Preprophase Microtubule Bands in Some Abnormal Mitotic Cells of Wheat

摘要: Caffeine treatment of growing wheat tissues was used to form binucleate or polyploid cells; preprophase microtubules in subsequent division cycles these and some other abnormal cells were then examined. In root tips, those with greatly enlarged nuclei usually contained one transverse band microtubules; sometimes this slightly asymmetrical skew, less commonly two bands seen. coleoptile vascular bundles, there generally more the elongated cells, appearing different planes. During formation stomatal complexes, almost invariably found where expected, preceding development both untreated also caffeine-treated material, regardless number, disposition size nuclei. This occurred even when wall stumps, formed during a previous abortive division, indicated that asymmetrical. It is concluded position(s) band(s) not particularly influenced by nucleus nuclei, being susceptible external morphogenetic influences which can persist for considerable time. Particularly case cell seems necessary seal off otherwise fulfil tendency towards division.