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时间:2020-04-24
《光照强度对白肋烟光合特性及中性致香成分的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、58中国烟草科学ChineseTobaccoScience2014.08,35(4)光照强度对白肋烟光合特性及中性致香成分的影响倪国仕,左梅,王瑞,吴文昊,向必坤,许自成(1湖北省烟草公司恩施州公司,湖北恩施445000;2.河南农业大学烟草学院,郑州450002)摘要:以鄂烟6号为供试材料,在团棵期至成熟期通过人工遮阴,设置3种透光率水平(100%、80%、60%),探讨了不同光照强度对白肋烟光合特性和中性致香成分等理化性状的影响。结果表明,透光率80%处理小区的烟叶单位面积叶源量明显高于对照100%自然光照与60%透光率处理。在遮阴前期,光照强度起主要控制作用,遮阴
2、处理的净光合速率较小(100%>80%>60%);而遮阴后期,遮阴处理小区环境温度较低,空气湿度与空气中CO2浓度相对较高,叶片蒸腾速率与气孔导度增加,净光合速率高于对照100%自然光照(100%<80%<60%),胞间CO2浓度降低。烟株对光照变化的适应性较强,长期遮阴能激发其对弱光的吸收和转化效率,透光率80%的中性致香成分、感官质量、非特异性过氧化物酶与超氧化物歧化酶活性整体均优于100%自然光照。但100%自然光强更能提高烟叶中水溶性糖含量,促进烟叶对水溶性氯、钾成分的吸收。总的来看,80%的光照条件下的烟叶品质更好,能满足工业企业的配方要求。关键词:白肋烟;光
3、照强度;光合特性;叶源量;中性致香成分;酶活性中图分类号:$572.01文章编号:1007.5119(2014)04.0058.06DOI:10.13496/j.issn.1007.5119.2014.04.0l1EfectsofLightIntensityonPhotosyntheticCharacteristicsandNeutralAromaConstituentsofBurleyTobaccoNIGuoshi,ZUOMei,WANGRui,WUWenhao,XIANGBikun,XUZicheng(1EnshiTobaccoCompanyofHubeiProvi
4、nce,Enshi,Hubei45000,China;2.TobaccoCollegeofHenanAgriculturalUniversity,Zhengzhou450002,China)Abstract:Toidentifytheefectsoflightintensityonphotosynthesisofburleytobaccoleavesduringfieldstages,andexplorethedistributiondiferencesofmainneutralaromaconstituentsincuredburleytobaccoleavesofd
5、iferentlightintensitiestreatment,artificialshadeexperimentwith3lighttransmittancelevel(100%,80%,60%)fromroseRestagetomaturationstagewascarriedoutbyusingBan6astestmateria1.Theresuksindicatedthatleafsourcecapacityperunitareaof80%transmittancelevelwashigherthantheothertwolevels.Intheearlyst
6、ageoftheshade,lightintensitywasthemajorcontrollingfactor,netphotosyntheticrateundershadingtreatmentwerelowerthanthatunderfullsunlight(100%>80%>60%);Inthelaterperiod,environmenttemperatureundershadingtreatmentwaslower,airhumidityandCO2concentrationwasrelativelyhighintheair,andstomatalcond
7、uctanceandtranspirationrateincreased,andnetphotosyntheticratewashigherthanCK(IO0%transmittanceleve1),buttheintercellularCO2concentrationdecreased.Tobaccoleaveshadas~ongadaptabilitytolight,andlong—termshadecouldstimulateitsabsorptionandconve~ioneficiencyofweaklight.Neutral
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