干旱胁迫下烤烟光合特性和氮代谢研究  

A Study on Photosynthetic Characteristics add Nitrogen Metabolism in Flue-curedTobacco under Drought Stress

作　　者：韩锦峰[1] 汪耀富[1] 岳翠凌[1] 张秀英[1] 

机构地区：[1]河南农业大学,郑州市邙山区农委

出　　处：《华北农学报》1994年第2期39-45,共7页Acta Agriculturae Boreali-Sinica

摘　　要：以烤烟品种ＮＣ８９（ＮｉｃｏｔｉａｎａｔａｂａｃｕｍＬ）为材料，在盆栽条件下研究了干旱胁迫对烤烟光合特性和氮素代谢的影响。结果表明，在干旱胁迫下烤烟叶片叶绿素含量减少，叶绿体希尔反应活力下降，净光合强度减弱，硝酸还原酶活性降低，脯氨酸含量升高，而呼吸速率则先上升后下降。上述指标均随土壤水分状况的变化而变化，表明它们对干旱胁迫的反应都很敏感。The effects of drought stress on photosynthetic characteristics and nitrogen metabolism in flue-cured tobacco leaves were studied with the cultivar NC89(Nicotiana tabacum L.) under pot experiment.The results showed that the chlorophyll content,the Hill reactivity of chloroplasts,net photosynthetic rate and the nitrate reductase(NR)activity in flue-cured tobacco leaves decreased, while the proline(PRO)content in the leaveg increased under drought stress. The rate of respiration raised under mild drought stress,but declined under serious drought stress. The above-mentioned indices changed with soil water conditions,it indicated that the responses of these indices to drought stress were sensitive.

关 键 词：干旱胁迫 光合特性 氮代谢 烤烟 

分 类 号：S572.01[农业科学—烟草工业]