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1、金银花新品种华金2号光合特性探究□口摘要：为了解金银花新品种华金2号的光合特性，以传统农家品种鸡爪花为对照，采用LI-6400XT便携式光合仪，测定二者的光合参数。结果表明：华金2号金银花净光合速率日变化呈双峰曲线，经相关性分析，净光合速率（Pn）与气孔导度（Cond）和光合有效辐射（PAR）极显著正相关，与空气温度（Ta）和蒸腾速率（Tr）显著正相关，与胞间C02浓度（Ci）显著负相关，和相对湿度（RH）相关性不显著。华金2号最大净光合速率（Amax）和光饱和点（LSP）均值分别为13.91pmol•m-2-s-1和1426.67pmol•m-2•s-1，高于
2、鸡爪花（13.06pmol•m-2•s-1,1065.33pmol•m-2•s-1）,而光补偿点（LCP）均值为40pmol•m-2•s-1，低于鸡爪花（56pmol•m-2•s-1L华金2号较传统农家品种鸡爪花的光适应范围更广，耐阴性更强，光合速率更高，而较高的光合速率又是植株高产的前提，本试验初步的光合特性研究，可为华金2号新品种的推广和栽培提供参考关键词：华金2号；新品种；金银花；光合特性中图分类号：S567.7+9文献标识号：A文章编号：1001-4942(2017)05-0063-05StudyonPhotosyntheticCharacteristi
3、csofNewVarietyofLoniceraejaponicaeFlos.Huajin2SuZheng,WangLingna,ZhangYongqing(ShandongUniversityofTraditionalChineseMedicine,Jinan250355,China)AbstractinordertostudyonthephotosynthesischaracteristicsofnewvarietyofLoniceraejaponicaeFlos.Huajin2,usingthetraditionalvarietyasareferenee,
4、theirphotosyntheticparameterswerederterminedbyLI-6400XIportablephotosynthesissystem・TheresultsshowedthatHuajin2haddoublepeaks.ThePnoftheHuajin2wereverysignificantlypositivelycorrelatedwithCondandPAR,significantlypositivelycorrelatedwithTaandTr,significantlynegativelycorrectedwithCi,a
5、ndnotsignificantlycorrelatedwithRH.Themaximumnetphotosyntheticrateandthelightsaturationpoint(LSP)ofHuajin2were13.91、1426.67pmol•m-2•s-1respectively,whichwerehigherthanthoseoftraditionalvariety(13.06,1065.33pmol•m-2•s-1).Whilethelightcompensation(LCP)ofHuajin2(40pmol•m-2•s-1)wassignif
6、icantlylowerthanthatoftraditonalvariety(56pmol•m-2•s-1)・Inconclusion,Huajin2hadwiderrangeofphotosyntheticadaptation,strongershadetoleranceandhigherphotosyntheticrate,whichwasthepremiseofhighyieldofplants.Inthispaper,thepreliminarystudyonphotosyntheticcharacteristicsprovidedabasisfort
7、hepromotionandcultivationofnewvarietyofLoniceraejaponicaeFlos.Huajin2.KeywordsHuajin2;Newvariety;LoniceraejaponicaeFlos.;Photosyntheticcharacteristics金花为忍冬科植物忍冬(LonicerajaponicaThunb.)的干燥花蕾或带初开的花口］,具有清热解毒、疏散风热等功效口］,属于大宗中药材，年需求量在2000x104kg以上［2］。金银花经长期的自然选择和变异，形成了许多地方品种，同时，长期的无性繁殖使品种产生
8、了退化［3］,产量和质量
