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1、园艺学报2008,35(5):673-680ActaHorticulturaeSinica光质对姜生长及光能利用特性的影响1,213133张瑞华,徐坤,董灿兴,李莹莹,吕杰12(山东农业大学园艺科学与工程学院/作物生物学国家重点实验室,山东泰安271018;潍坊职业学院农业工程系,3山东潍坊261041;菏泽学院园林工程系,山东菏泽274015)摘要:以彩色电光源创造不同光质环境,研究了光质对姜生长、叶片光合作用及叶绿素荧光参数的影响。结果表明:室内人工光源条件下,姜苗生长量、叶绿素含量及叶片光合
2、速率(Pn)以白光和红光处理较高,蓝光居中,绿光较低。室内不同光质处理的姜苗移至室外自然光照条件下测定叶片Pn和光呼吸速率(Pr),其中白光处理较高,蓝光、红光和绿光处理依次降低,而Pr/Pn则相反;叶片Fv/Fm、Fv′/Fm′及qP在午间强光下显著降低,其值以白光处理较高,蓝光、红光和绿光处理依次降低,PSⅠ和PSⅡ之间激发能分配不平衡偏离系数(β/α-1)则刚好相反;叶片用于光化学反应的激发能(P)以白光处理较高,绿光处理较低,蓝光、红光处理居中,而天线热耗散能量(D)和反应中心过剩能量(E
3、x)则以绿光处理较高,白光处理较低。关键词:姜;光质;生长;光合速率;叶绿素荧光中图分类号:S63215文献标识码:A文章编号:05132353X(2008)0520673208EffectsofLightQualityonGrowthandLightUtilizationCharacteristicsinGinger1,213133ZHANGRui2hua,XUKun,DONGCan2xing,LIYing2ying,andLüJie1(StateKeyLaboratoryofCropBiolo
4、gyandCollegeofHorticultureScienceandEngineering,ShandongAgriculturalUniversity,2Taipan,Shandong271018,China;AgriculturalEngineeringDepartmentofWeifangVocationalCollege,Weifang,Shandong3261041,China;LandscapeEngineeringDepartmentofHezeUniversity,Heze,S
5、handong274015,China)Abstract:Effectsoflightqualityonthegrowth,photosynthesisandchlorophyllfluorescenceofgingerwereinvestigatedinthisstudy.Theresultsindicatedthatwhiteorredlightinducedthegreatestgrowth,chlo2rophyllcontentandnetphotosyntheticrate(Pn),fo
6、llowedbyblueandgreenlightinorderfromhightolowlevel.Whengingerseedlingsweretransferredtosunlight,thePnandphotorespiration(Pr)ofleavestreatedwithwhitelightwerethehighest,followedbyblue,redorgreenlightinturn,whilethatofPr/Pnwasre2verse.Themaximalphotoche
7、micalefficiency(Fv/Fm)andefficiencyofexcitationenergycapturebyopenPSⅡreactioncentres(Fv′/Fm′)aswellasphotochemicalquenchingcoefficient(qP)decreasedmarkedlyun2dermiddystronglight.Buttheirvaluesindifferenttreatmentsweredifferent,withthehighestvaluesinwh
8、itelighttreatment,followedbyblue,redorgreenlightinorderfromhightolowlevel.Contrarily,white,blue,redorgreenlighttreatmentinducedtherelativedeviationfromfullbalancebetweentwophotosystems(β/α-1)ingingerleavesincreasedinturn.Inparallel,theexcitati
