农学学报2026，Vol.16Issue(3)：16-20,5.
生长调节剂对低温胁迫烟草的缓解效果
Mitigation Effect of Growth Regulators on Low Temperature Stress to Tobacco
摘要
Abstract
The purpose of this study is to evaluate the effect of commercial growth regulators on alleviating the harm of low temperaturestress.Tobacco seedlings were treated with artificial climate box at 8℃,and different concentrations of commercial growth regulators'Wotaibao'and'Baiande'were sprayed.The growth of tobacco seedlings before spraying and after spraying 1 time,2 times and 3 times was investigated.The activities of SOD,POD,PPO and CAT in leaves were detected,and the root activity,MDA and proline content were measured.After low temperature stressat seedling stage,the root activity of tobacco seedlings showed a trend of increasing first and then decreasing;the activity of SOD showed an increasing trend;the activity of POD,CAT,PPO and proline content showed a trend of decreasing first and then increasing.The seedling index,root activity,protective enzyme activity,malondialdehyde and proline content were all increased after spraying the commercial growth regulators'Wotaibao'and'Baiande'at different concentrations.The strong seedling index was effectively improved after spraying'Wotaibao'for 3 times,and the effects of 3 concentrations were not significantly different.Spraying'Wotaibao'diluted 200 times once,and diluted 500 times and 800 times twice had the best effect on improving root activity.Spraying three times with 200 times dilution of'Wotaibao'had the best effect on improving SOD and PPO enzyme activity,malondialdehyde and proline content.The root activity and seedling index were most effectively improved by spraying 750 times dilution of'Baiande'for 2-3 times.The effect of increasing protective enzyme activity,malondialdehyde and proline content was the best after spraying'Baiande'diluted 1500 times for 3 times.The harm of low temperature stress was alleviated through physiological index changes after spraying commercial growth regulators'Wotaibao'and'Baiande'.Based on this,it is recommended to use'Wotaibao'diluted 200 times to spray 2-3 times,or'Baiande'diluted 750-1500 times to spray 2-3 times.关键词
生长调节剂/烟草/低温/保护酶/根系活力/丙二醛/脯氨酸Key words
growth regulator/tobacco/low temperature/protective enzymes/root viability/malondialdehyde/proline分类
农业科技引用本文复制引用
孙计平,吴照辉,李雪君,孙焕,韦凤杰..生长调节剂对低温胁迫烟草的缓解效果[J].农学学报,2026,16(3):16-20,5.基金项目
中国烟草总公司河南省烟草公司重点项目"烤烟新品系Y2001配套技术优化和应用"(2023410000240020). （2023410000240020）
