【摘要】 对 6个不同甘蔗品种 (粤糖 91 /976、粤糖 86/3 68、桂糖 1 1号、新台糖 1 6、CP80、农林 8号 )茎尖生长点细胞分裂进行切片观察研究 ,结果表明 :甘蔗一天内 (白天 )不同时间都存在细胞分裂 ,而且细胞分裂指数呈规律性变化 ,大部分呈先升后降再上升的变化趋势。除了桂糖 1 1号在 8∶0 0出现细胞分裂高峰之外 ,其它五个品种均在 1 0∶0 0出现细胞分裂高峰期 ,1 2∶0 0～ 1 4∶0 0是细胞分裂的低谷。种在不同生长时期细胞分裂指数变化规律不一样 ,细胞分裂高峰期出现的时期也不一样 ,早熟品种出现的时期早一些 ,晚熟品种则晚一些。甘蔗茎径和各生长时期细胞分裂指数是呈正相关的 ,茎径大 ,细胞分裂指数高 ,相反 ,茎径小 ,细胞分裂指数低。更多还原

【Abstract】 Field experiment was carried out to study the cell division index of stem apices growing point of six sugarcane varieties (Yuetang 91/976, Yuetang 86/368, G11, ROC 16, CP 80, Nonglin 8). The cell is dividing at all day and the cell division index is changing regularly. The cell division peak of G 11 appeared at 8∶00 am, but the others at 10∶00 am. There was a nadir from 12∶00 to 14∶00.The law of cell division index of sugarcane was different with the sugarcane growing stage, the peak of cell division of the early maturing varieties emerged earlier, the later varieties emerged later. Cell division index of six sugarcanes was significantly different at the level 0.05, Yuetang 86/368 was the highest (2.30%), moreover Nonglin 8 is the lowest (0.77%). The correlation of cell division index and the stem diameter in different growing stages was positive. The correlation on June 30 was significant at the level of 0.05,on July 11 reached at level 0.01.更多还原