甘蔗茎尖初生增粗分生组织与顶端分生组织细胞分裂研究

Studies on the cell division of primary thickening meristem and apical meristem of the shoot apex in sugarcane

用压片法 ,分别对 6个茎径不同的甘蔗品种 (粤糖 86/ 3 68、粤糖 91 / 976、桂糖 1 1号、新台糖 1 6号、美国 CP80 -1 82 7、日本农林 8号 )茎尖初生增粗分生组织和顶端分生组织的细胞分裂指数进行观察比较。结果表明 ,各品种初生增粗分生组织的细胞分裂指数都大于顶端分生组织的 ;虽然两种分生组织的细胞分裂指数不同 ,但二者在白天 6个时间段 (8∶ 0 0、 1 0∶ 0 0、 1 2∶ 0 0、 1 4∶ 0 0、 1 6∶ 0 0、 1 8∶ 0 0 )和不同的生长时期(6月 9日、 6月 1 7日、 6月 3 0日、 7月 1 1日、 7月 2 1日 )的变化趋势相似 ,说明两种分生组织的细胞分裂具有明显的同步性。

In the way of squash technique, the cell division indexes of primary thickening meristem and apical meristem of the shoot apex in six varieties of sugarcane (YT86/368、YT91/976、GT11、ROC16、CP80-1827、NL8) was studied . The result showed that the primary thickening meristem had a much higher cell division index than the apical meristem.Although the cell division index was different between the primary thickening meristem and the apical meristem,they formed similar curves at different times in a day (8∶00,10∶00,12∶00,14∶00,16∶00,18∶00,respectively) and at different growth stages (June 6, June 17, June 30, July 11, July 21,respectively). So we suppose that the cell divisions of them were synchronous.