冷浸胁迫对种子活力的影响

为了探究冷浸胁迫对不同处理的种子活力的影响，通过对2份水稻种子材料进行4℃的冷浸处理，1份材料为包衣种子，1份材料为未包衣种子，设未经冷浸处理的材料为对照，每个处理设置3个重复，观测其发芽势、发芽率、芽长、芽鲜重及芽干重等指标。结果表明：包衣种子冷浸处理的发芽率(93%)与对照的发芽率(94.67%)无显著差异，而未包衣种子冷浸处理的发芽率(79%)比对照(97%)低，差异达显著水平；冷浸处理对种子活力的影响显著，但包衣处理可以降低种子对低温胁迫的反应，保护种子的生理活性。因此，实际工作中，包衣种子低温贮藏对种子活力的维持性较好。

The Influence of Low Temperature Stress on the Vigor of Oryza sativa L. Seeds

In order to explore the influence of cold stress on the vigor of seeds with different treatment, 2 rice materials were analyzed in the present paper. It’s based on the treatment of 4℃ cold soaking and one materials for coating seeds, another materials uncoated, set without immersion treatment material for the control, each treatment have 3 repetitions. By the observation of the germination potential, germination rate, shoot length, shoot fresh weight and shoot dry weight. The results showed that, the germination rate (93%) of coating seed with immersion treatment and the germination rate (94.67%) of control had no significant difference, but the germination rate (79%) of uncoated seed with immersion treatment was lower than the control (97%), the difference reached significant level; the influence of cold stress on the vigor of seeds was obvious, but the coating could reduce the reaction of seed on low temperature stress and protect physiological activities of seeds. Therefore, the low temperature preservation of coated seed was better for viability maintained in practical work.