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Interactions

By Anita Woods,2014-02-18 10:44
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Interactions

    Interactions

    PPFDabove800mumolm(2)S(

    1)wasreducedby32%inS.superbaandby17%inG.stramineawhensoilwasmoist,and by43%and53%,respectively,whensoilwasdry.Ourresultssuggestthatthehighradiationinducesphotoinhibitionand

    significantlylimitsphotosyntheticcarbongain,andthelimitationmayfurtherincreaseathighertemperatureandindrysoil.

    Keywords:LOW-TEMPERATUREPHOTOINHIBITION;PHOTOSYSTEM

    II;ELEVATEDCO2;WATER-STRESS;PLANT

    FORM;LIGHT;ACCLIMATION;CONDUCTANCE;DROUGHT;FOREST

    ARCTICANTARCTICANDALPINERESEARCH2004,36(2):219228

    Interactionsbetweenorganicandinorganiccarbonsourcesduring

    mixotrophiccultivationofSynech0c0ccussp.

    Kang,RJWang,JShi,DJCong,WCai,ZLFan,OY

    ChineseAcadSci,StateKeyLabBiochemEngn,lnstProcEngn,Beijing100080,PeoplesRChina.

    TianjinUnivSci&Technol,CoilMarineSci&Engn,Tianjin300450,PeoplesRChina.

    Abstract:Glucoseat3gl(

    1)markedlyacceleratedgrowthofSynechococcussp.PCC7002.Thenetphotosynthesisrate was263mumol0-2(mgChlahX1)formixotrophiccultureand146mumolO

    2(mgChlah)(1)forphotoautotrophicculture.

    Additing1gNaHCO3l(1)totheglucose

    supplementedcultureenhancedthephotosyntheticrateby18%,andthetotal carbonconsmnptionratewasraisedto2.5mgl(1)(mgchlahX

    1)fromapreviouslynegativevalue.Aninteractionbetween

    organicandinorganiccarbonmetabolismwasestablished.

Keywords:glucose;mixotrophy;photosynthesis;Synechococcus

    BIOTECHNOLOGYLETTERS2004.26(18):1429-1432

    Pressureequilibriumandjumpstudyonunfolding0f23kDaprotein

    fromspinachphotosystemII

    TanCY,XuCH,WongJ,ShenJR,SakumaS,YamamotoYLangeR,BalnyC,RuanKC ChineseAcadSci,ShanghailnstBiochem&CellBiol,320YueYangRd,Shanghai,20003IPeoplesRChina

    UnivMontpellier2,lnstFederatifRechI22,INSERM,Unit710,Montpellier,France OkayamaUniv,FacSci,DeptBiol,Okayama,700Japan

    OkayamaUniv,GradSchNatSci&Technol,FacSci,Okayama,700Japan ChineseAcadSci,ShanghaiInstBiolSci,lnstPlantPhysiol,Shanghai,PeoplesRChina ChineseAcadSci,ShanghailnstBiolSci,lnstBiochem&CellBiol,KeyLabProteom,Shanghai,PeoplesRChina

    Abstract:Pressure..inducedunfoldingof23..kDaproteinfromspinachphotosystemIIhasbeensystematicallyinvestigated

    atvariousexperimentalconditions.Thermodynamicequilibriumstudiesindicatethattheproteinisverysensitivetopressure.

    At20degreesCandpH5.5.23kDaproteinshowsareversibletwo

    stateunfoldingtransitionunderpressurewithamidpoint

    near160MPa.whichismuchlowerthanmostnaturalproteinsstudiedtodate.Thefreeenergy(DeltaG(u))andvolume

    

    69

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