烤烟成熟期衰老特性的品种间差异与其氨气补偿点的关系  

Relationship of Senescence Characteristic Difference Between Flue-cured Tobacco Varieties at Maturity Stage with NH3 Compensation Points Thereof

作　　者：徐清泉[1] 解莹莹[1] 刘化冰[1] 夏琛[1] 程昌合[1] 李丹丹[1] 项波卡[1] 杨铁钊[2] 

机构地区：[1]浙江中烟工业有限责任公司技术中心,杭州市中山南路77号310008 [2]河南农业大学烟草学院,郑州市文化路95号450002

出　　处：《烟草科技》2013年第6期69-73,共5页Tobacco Science & Technology

基　　金：国家烟草专卖局项目"烤烟浓香型特色新品种选育及示范"(hykj200817)

摘　　要：为明确不同烤烟品种成熟期的衰老特性差异与其氨气补偿点的关系,采用盆栽试验测定了3个烤烟品种(中烟90、K326和NC89)的叶片质外体NH4+浓度和pH,并计算不同品种烤烟的氨气补偿点(25℃)。结果表明,成熟期3个烤烟品种叶片质外体NH4+浓度均呈上升趋势,衰老速度快的品种,其叶片氮素含量低,谷氨酰胺合成酶活性小,氨气补偿点绝对值高、上升幅度大。因此,烤烟成熟期衰老速度快的品种具有较大的氨挥发潜力,烤烟衰老特性的品种间差异与其氨气补偿点的差异有关。To better understand the relationship of senescence characteristic difference between different flue-cured tobacco varieties at maturity stage with NH3 compensation points, pot experiments on three varieties （ZY90, K326 and NC89） were carried out, foliar apoplastic NH4＋ concentration and pH were determined, and their NH3 compensation points （ks, 25℃） were calculated. The results showed that an increase trend was observed in the apoplastic NH4＋ concentration in all the three varieties at maturity stage; comparing with slow senescing cultivar, the leaves of fast senescing tobacco cultivar possessed lower N content, lower glutamine synthetase activity, higher absolute value of NH3 compensation point （Xs, 25 ℃） and larger increasing extent.Therefore, the fast senescing tobacco cultivar featured a higher potential of NH3 emission from senescing leaves at maturity stage, and the difference of senescence characteristics between varieties related to their difference of NH3 compensation points.

关 键 词：烤烟 成熟期 氨气补偿点 衰老特性 

分 类 号：S572.01[农业科学—烟草工业]