经不同质量浓度的 778诱导剂处理过的 2个水稻品种 (丽粳 2号 ,十和田 ) ,在 (2 5± 1)℃ ,2 5 0 0lx的温箱中生长到二叶期的结果 :质量浓度为 33 .33g/L的抑制水稻的生长 ,2 5 .0 0g/L的为水稻生长的最适浓度 .在二叶期水稻的叶片上喷洒相应质量浓度的试剂 ,置于低温 (0± 1)℃ ,4d ,恢复 1d后 ,统计存活率 .经质量浓度为 33 .33g/L的试剂处理过的幼苗存活率最高 .抗冷品种 (丽粳 2号 )各质量浓度下的水稻幼苗的存活率均高于不抗冷品种 .西双版纳香荚兰种植基地的香荚兰在遭受了前后 2次 (0± 1)℃天然冻害后 ,在恢复生长过程中 ,对其分别给予了 778诱导剂 ,BR - 12 0的喷洒处理 .通过对不同部位香荚兰叶片的超氧化物岐化酶 (SOD)、过氧化物酶 (POD)活性的测定发现 ,低温胁迫后的香荚兰植株 ,喷洒了BR - 12 0和 778诱导剂的植株 ,叶片中的SOD ,POD酶活性均高于对照植株 Two rice cultivars (Laijing No.2 and Shiwa Tian) treated with different concentrations of 778 inducer showed the results of two-leaf stage in (25 ± 1) ℃ and 2550 lx incubators: the mass The concentration of 33.33g / L inhibited the growth of rice, and the optimum concentration of 25.0g / L for rice growth was sprayed on the leaves of two-leaf stage rice at low temperature (0 ± 1) ℃, 4d, 1d after recovery, the survival rate of the seedlings treated with the reagent with the concentration of 33.33g / L was the highest.The survival rate of seedlings of the cold-resistant variety (Laijing No.2) The survival rate was higher than the non-resistant varieties.Pan vanilla in the base of vanilla cultivation in Xishuangbanna were subjected to natural freezing injury twice before and after (0 ± 1) ℃, during the recovery of growth, were given 778 inducer , BR - 120. Through measuring the activities of superoxide dismutase (SOD) and peroxidase (POD) in different parts of the vanilla leaves, we found that the vanilla plants after low temperature stress were sprayed The plants with BR-120 and 778 inducers showed higher activities of SOD and POD in the leaves than the control plants