【摘要】 通过对叶面喷施S330 7,研究了S330 7对烤烟烟苗生长情况及某些生理特性的影响。结果表明 ,在大十字期喷施S330 7可以抑制烟苗节间的伸长 ,降低烟苗株高 ;烟苗的根冠比提高10 9%～ 15 7% ;降低烟苗叶组织中自由水含量 ,提高束缚水含量 ,束缚水与自由水的比值增加0 .7%～ 2 7.9% ;S330 7处理烟苗POD活性提高 34.9%～ 4 2 .8% ,叶组织中游离脯氨酸含量降低2 8.7%～ 4 5 .5 % ,降低了低温下叶组织相对膜透性和膜伤害度。S330 7喷施烟苗 ,还降低了叶片中内源赤霉素水平 ,提高了细胞分裂素含量更多还原

【Abstract】 Effects of Uniconazole on the growth of flue cured tobacco seedlings have been studied. The results were that foliage spray of Uniconazole in seedling bed stage made the seedlings shorter and stronger. The root shoot ratio of the treated seedlings was raised to 109%-157%, the combined water content was enhanced, the free water content in leaf tissue was lowered and thus increased the ratio of the above two to 0.7%-27.9%. The peroxidase activity was raised to 34.9%-42.8% . The free praline content in leaf tissue was lowered to 28.7%-45.5%. The level of iPAs was increased and GA3 was diminished.更多还原