杨华应 刘桂虎 周应兵 李廷春

摘要 [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。

关键词 烤烟品种；干旱胁迫；抗旱性；生理指标

中图分类号 S501 文献标识码 A 文章编号 0517-6611（2017）13-0020-04

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

YANG Hua-ying， LIU Gui-hu， ZHOU Ying-bing*， LI Ting-chun*

（Tobacco Research Institute， Anhui Academy of Agricultural Sciences， Hefei， Anhui 230031）

Abstract [Objective] To study the drought resistance of 5 flue-cured tobacco cultivars. [Method] Five flue-cured tobacco cultivars 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 varieties of flue-cured tobacco in arid areas.

Key words Flue-cured tobacco；Drought stress；Drought resistance；Physiological index

烤煙是我国重要的经济作物之一，整个生育期对水分的要求高。筛选鉴定抗旱的种质是目前选育优良抗旱品种的前提，为此研究者们也开展了烤烟抗旱性研究以及抗旱品种筛选工作。汪耀富等[1]研究表明，丙二醛（MDA）、超氧化物歧化酶（SOD）、过氧化物酶（POD）与过氧化氢酶（CAT）均可作为烟草品种抗旱性的衡量指标之一。上述指标对干旱胁迫的反应都很敏感，而干旱对烟株的伤害可能与其体内活性氧代谢失调有关。

尹福强[2]采用盆栽试验研究了干旱处理对不同品种烟草植株的理化指标的影响，结果表明，干旱处理后，CAT活性和MDA含量显著增加，脯氨酸（Pro）含量迅速积累，抗旱品种的SOD活性先迅速升高然后逐渐下降，非抗旱品种的SOD则在干旱处理期间缓慢上升。

笔者以新育成的烤烟品种（安烟2号）、生产上3个烤烟主栽品种（K326、云……