干旱胁迫下5个烤烟品种的生理指标变化及抗旱性比较

Physiological Changes and Drought Resistance Comparison of 5 Flue-cured Tobacco Cultivars under Drought Stress

[目的]比较5个烤烟品种的抗旱性。[方法]选用5个烤烟品种(安烟2号、K326、云烟97、中烟100、中烟14),采用漂浮育苗技术育苗,在苗期5叶期进行干旱胁迫处理,并对与抗旱性相关的部分生理指标进行了测定。[结果]相同的干旱胁迫条件下,某些烤烟品种对干旱的敏感程度和忍耐力存在显著差异,安烟2号和中烟14的抗旱性相近,属抗旱性较强的品种,云烟97和中烟100次之,K326的抗旱性最弱。[结论]该研究结果可为干旱地区烤烟主栽品种的选择提供参考。

[ Objective] To study the drought resistance of 5 flue-cured tobacco cuhivars. [ Method] Five flue-cured tobacco cuhivars were selected and cultured by using floating seedling-raising technology. And they were treated with drought stress at 5-leaf period of seedling. And some physiological indices related with drought resistance were determined. [ Result] Under the same conditions of drought stress, the sensitivity and tolerance of some flue-cured tobacco cultivars to drought had significant difference. The drought resistance of Anyan 2 and Zhongyan 14 was similar, belonging to flue-cured tobacco cultivars with stronger drought resistance. The drought resistance of Yunyan 97 and Zhongyan 100 followed by, and the drought resistance of K326 was the most worst. [ Conclusion] The results can provide reference for selecting main va- rieties of flue-cured tobacco in arid areas.