Growth of the tulip shoot
Growth of the tulip shoot
复制标题
郁金香芽的生长
DOI：
10.1016/0304-4238(73)90025-3
复制
发表时间：
1973
影响因子：
4.3
通讯作者：
A. R. Rees
中科院分区：
文献类型：
--
作者：
J. Gilford;A. R. Rees
郁金香球茎(参见在3种商业胁迫处理下，分两季在大田条件下生长，观察地上部干重和高度的变化，并与表皮细胞长度的变化进行比较。贮藏温度的变化并不总是导致地上部干重或伸长生长的变化。大田的最终相对生长率与强迫种球的相对生长率一样高，大田种植的植株较大是因为它们的生长期较长。茎和叶的伸长几乎完全是由于发育早期产生的细胞的伸长，但在大田种植的植物中也有一些细胞分裂的迹象。在较晚的季节(花开始比正常晚2-3周)，细胞数量似乎很少。茎短是因为不适当的冷处理，除了一个案例，特别冷导致正常的茎长度，但细胞非常长。我们认为，较低的细胞数与花分化较晚有关，这可能是由于顶端尺寸较小所致。早期强迫这种物质是不成功的，尽管田间生长是令人满意的，因为较长的生长季节允许进一步的细胞分裂发生。
Tulip bulbs (cv. ‘Apeldoorn’) were grown under three commercial forcing treatments and in the field in two seasons, and changes in shoot dry weight and height were followed and compared with changes in epidermal cell length.Changes in storage temperature did not always result in changes in dry weight or extension growth of shoots. The final relative growth rates in the field were as high as those of the forced bulbs, and the larger size of the field-grown plants was due to their longer growth period. Stem and leaf extension were almost entirely due to elongation of cells produced early in development, but there were some indications of cell division in field-grown plants.In a late season (flower initiation 2–3 weeks later than normal) cell number appeared to be low. Stems were short because of inadequate cold treatment, except in one case where extra cold resulted in normal stem lengths but with very long cells. We suggest that low cell number in the shoot is associated with late flower initiation, and that this may be due to small apical size. Early forcing of such material is unsuccessful, although growth in the field is satisfactory, because a longer growing season allows further cell division to occur.