不同光照环境下荷花叶片光合光响应模型比较冷寒冰

*＊＊/200231‘’50%24．4＞＞＞3PnmaxLSP．LSP、Pnmax、ＲdLCP．Ｒd．．1001－9332201410－2855－06Q948．1AComparisonoflightresponsemodelsofphotosynthesisinNelumbonuciferaleavesunderdif-ferentlightconditions．LENGHan-bingQINJunYEKangFENGShu-chengGAOKaiShanghaiBotanicalGarden/ShanghaiEngineeringＲesearchCenterofSustainablePlantInnova-tionShanghai200231China．-Chin．J．Appl．Ecol．201425102855－2860．AbstractThelightresponsesofNelumbonucifera‘BoliFuren’alocalN．nuciferaspecieswasinvestigatedunderfulllightand50%shadingconditionsinShanghai．Thenetphotosyntheticrate－lightresponsecurvesofN．nuciferaleaveswerefittedandanalyzedthroughfourlightresponsemodelstoidentifythebest-fitmodelsofdifferentlightconditionsandexploretheadaptabilityofN．nuciferatoshadingenvironment．Theresultsshowedthatthesequenceoffittingeffectofthefourlightresponsemodelswasindescendingorderofmodifiedrectangularhyperbolamodel＞exponen-tialmodel＞non-rectangularhyperbolamodel＞rectangularhyperbolamodel．Thelatterthreemod-elshadnoextremevaluesandcouldnotdirectlyandaccuratelyprovidevaluesoflightsaturationpointLSPandmaximumnetphotosyntheticratePnmax．IncontrastthemodifiedrectangularhyperbolamodelshowedthebestfitforLSPPnmaxdarkrespirationrateＲdandLCPresultingintheminimumrelativeerrorsbetweenthemeasuredandfittedvalues．LightresponseparametersofN．nuciferadeclinedwiththedecreasinglight．TherewerenosignificantdifferencesbetweenfulllightandshadetreatmentsexceptforＲd．ItwasindicatedthatN．nuciferahadgoodphotosyntheticadaptiveresponseandadjustmenttoweaklighttomaintainnormalgrowth．KeywordslightresponsemodelNelumbonuciferashadingnetphotosyntheticratelightre-sponseparameter．*“”2013BAJ02B01-420146．＊＊[e-mail]2014-02-192014-07-17．1．2．．、、．2014102510ChineseJournalofAppliedEcologyOct．201425102855－2860DOI:10.13287/j.1001-9332.20140801.010．Nelumbonucifera．、、．、、3．4、5－6、78．、．11.131°17'N121°18'E．．．2002、‘’．20136、．50%23．、、．1.21.2.12013715DT-8809A700—19002h2150%．1Fig．1Diurnalvariationoflightintensityunderfulllightandshadingconditions．1.2.22013715—18Li-6400LiCorInc．LincolnUSALED900—11002400、2100、1800、1500、1200、1000、800、600、500、400、300、250、200、150、100、50、20、0μmol·m－2·s－1．CO2400μmol·mol－175%．3．1000μmol·m－2·s－130min．PnＲdμmol·m－2·s－1、LCPμmol·m－2·s－1、Pnmaxμmol·m－2·s－1LSPμmol·m－2·s－1．1.31.3.19PnI=αIPnmaxαI+Pnmax－Ｒd1PnIIμmol·m－2·s－1αμmol·μmol－1PnmaxＲd．LCPLCP=ＲdPnmaxαPnmax－Ｒd2y=PnmaxPn≤200μmol·m－2·s－1x．1.3.29PnI=α+IPnmax－αI+Pnmax2－4αIkP槡nmax/2k－Ｒd3k．LCPLCP=ＲdPnmax－kＲ2dαPnmax－Ｒd4y=PnmaxPnI≤200μmol·m－2·s－1x658225．1.3.310PnI=PnmaxI－e－αI/Pnmax－Ｒd5LCPLCP=－PnmaxαlnI－ＲdPnmax6LSPPnI0．90Pnmax．1.3.411PnI=α1－βI1+γII－Ｒd7α、β、γI．LCPLCP=－γＲd－α－γＲd－α2－4αβＲ槡d2αβ8LSPLSP=β+γ/槡β－1/γ9PnmaxPnmax=αβ+γ槡－槡βγ2－Ｒd10I=IcLCPΦcΦc=Pn'Ic=α1+γ－βIc－βγIc21+γIc211ΦcAQY12．ＲEＲE=|yt－^yt|/yt12yt^yt．ＲE．1.4SPSS17．0、α=0．05．Excel2007．22.12PnPAＲPAＲ＜800μmol·m－2·s－1PnPAＲPAＲ2PnPAＲPAＲ=1000～1500μmol·m－2·s－1PnPAＲ=1500～2500μmol·m－2·s－1Pn2Fig．2Netphotosyntheticrate－lightresponsecurvesofNelum-bonuciferaleavesunderdifferentlightregimes．．PnPn．PnPAＲ=1800μmol·m－2·s－1Pn18.31μmol·m－2·s－1Pn9．3%．2.21PnmaxLSPPnmaxLSPPnmaxLSP．LSPPnmaxLSP．Ｒd．Ｒ20．995．2.34PnＲE．2ＲE0．037ＲE0．3130．309．4．、ＲE0.027、0.0620.01175821014Table1Measuredandfittedvaluesofnetphotosyntheticrate－lightresponseparametersofNelumbonuciferaleavesinthefourmodelsLightresponsemodelTreatmentLightresponseparameterＲdμmol·m－2·s－1LCPμmol·m－2·s－1Pnmaxμmol·m－2·s－1LSPμmol·m－2·s－1αμmol·μmol－1Ｒ2Fulllight4．4190．0018．802500．00－－MeasuredvalueShade3．1681．0016．632100．00－－Fulllight4．4785．5428．56792．240．0620．998ＲectangularhyperbolamodelShade3．4479．4425．52862．090．0500．996Fulllight3．7382．8825．00827．340．0450．996Non-rectangularhyperbolamodelShade2．9070．4425．00998．000．0420．997Fulllight3．8591．4922．631724．770．0460．999ExponentialmodelShade2．9784．4120．031578．670．0380．999Fulllight4．1790．3618．772450．780．0531．000Modifiedrectangularhyper-bolamodelShade3．0482．3817．492316．630．0401．0002PnTable2Ｒelativeerrorsofmeasuredandfittedvaluesofnetphotosyntheticrate－lightresponseparametersofNelumbonuciferaleavesLightresponsemodelTreatmentＲEＲdLCPPnmaxLSPMeanFulllight0．0140．0500．5190．6830．317ＲectangularhyperbolamodelShade0．0890．0190．5350．5890．308Fulllight0．1540．0790．3300．6690．308Non-rectangularhyperbolamodelShade0．0820．1300．5030．5250．310Fulllight0．1270．0170．2040．3100．165ExponentialmodelShade0．0600．0420．2040．2480．139Fulllight0．0540．0040．0020．0200．020ModifiedrectangularhyperbolamodelShade0．0380．0170．0520．1030．053ＲE0．204、0．2790．030ＲdＲE0．0520．046．ＲE4Pn＞＞＞．ΦcΦc0．0460．037．．．1Ｒd、LCP、LSPPnmax．ＲdLCP29．6%7.7%Ｒd．LSPPnmax．50%LSPPnmax6．8%5．5%．33.11．13－14．858225、PnmaxLSP15－16．3PnmaxLSP217Periplocasepium2、Triticumaestivum18、Oryzasativa18、Eucalyptusgrandis×E．urophylla1．PnmaxLSP111719－20．4．4LSP、Pnmax、ＲdLCP．21．3.2、、22．、、、23Spiraeasalicifolia24、Brassicacampestris25、Phello-dendronamurense26、Thujasutchuenen-sis27、Trolliuschinensis28、Forsyth-iasuspensa29．Ｒd、LCP、LSP、PnmaxαＲd29．6%．3031．．32－34．50%．．1QianL-WZhangX-SYangZ-Jetal．Comparisonofdifferentlightresponsemodelsforphotosynthesis．JournalofWuhanBotanicalＲesearch2009272197－203inChinese2WangＲ-ＲXiaJ-BYangJ-H．Comparisonoflightresponsemodelsofpho