DA-6对水稻种子萌发和幼苗生长的影响

EFFECTS OF DA-6 ON SEED GERMINATION AND SEEDLING GROWTH IN RICE

以不同浓度 (0 .5 μg/L ,1μg/L ,5 μg/L ,10 μg/L ,2 0 μg/L ,40 μg/L)DA - 6处理水稻种子 ,研究其对水稻种子萌发和幼苗生长的影响。结果发现 :较低浓度的DA - 6能提高种子发芽势和活力指数 ,且能提高萌发时α -淀粉酶及总淀粉酶的活性。DA - 6还使水稻幼苗株高受抑 ,根冠比、发根力增大 ,显著提高叶绿素含量及根系活力。DA - 6浸种处理水稻种子的浓度范围为 5 μg/L～ 10 μg/L ,以 10 μg/L为佳。

Rice seeds were presoaked with DA-6, a new plant growth regulator of the cytokinin type, at 0.5, 1, 5, 10, 20 or 40 μg/L for 36 h before germination. Lower concentrations of DA-6 proved to improve the germination energy and vigor indexes of the seeds and enhance amylase activity. DA-6 reduced plant height, raised root/top ratio, stimulated root growth, increased chlorophyll content and heightened root vitality. DA-6 concentrations in the range of 5 to 10 μg/L gave satisfactory results, with 10 μg/L being the optimum.