POSTMITOTIC ISODIAMETRIC CELL-GROWTH IN THE MAIZE ROOT APEX
POSTMITOTIC ISODIAMETRIC CELL-GROWTH IN THE MAIZE ROOT APEX
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DOI：
10.1007/bf00195876
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发表时间：
1990-06-01
期刊：
影响因子：
4.3
通讯作者：
HAUSKRECHT, M
中科院分区：
文献类型：
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作者：
BALUSKA, F;KUBICA, S;HAUSKRECHT, M
玉米（Zea mays L.）初生根的各种组织中，细胞快速伸长的起始位置与根尖的距离不同。此外，这些距离与有丝分裂停止的距离的比较显示出相当大的差异。快速细胞伸长的开始比细胞分裂的停止离根尖远得多，因此在每一个检查的玉米根组织中可以区分出一个不同的区域。该区域被称为有丝分裂后“等直径”细胞生长区域。在这个区域中的细胞生长的宽度以及长度，并获得了大约一个正方形等直径的形状。与分生组织中的细胞一样，它们也具有强烈的核酸代谢的特征。在多倍体和二倍体组织中都观察到这种显著的有丝分裂后“等直径”细胞生长，表明有丝分裂后“等直径”细胞生长，如有丝分裂和细胞伸长生长，代表了植物细胞个体发生中的一个重要发育阶段。
The onset of rapid cell elongation occurred at different distances from the apex in various tissues of the primary root of maize (Zea mays L.). Furthermore, the comparison of these distances with those determined for the cessation of mitotic divisions revealed a considerable discrepancy. The onset of rapid cell elongation was realized much farther from the root apex than the cessation of cell divisions and therefore a distinct region could be distinguished in every examined maize root tissue. This region was denoted the region of postmitotic ''isodiametric'' cell growth. Cells in this region grew in width as well as in length and obtained approximately a square-isodiametric shape. They were also characterized, as are cells in the meristem, by intense nucleic-acid metabolism. This prominent postmitotic ''isodiametric'' cell growth was observed in both polyploid and diploid tissues, and indicates that postmitotic ''isodiametric'' cell growth, like mitotic division and cell elongation growth, represents an important developmental stage in plant cell ontogeny.