资源描述：
《植物生物钟课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、RhythmsofLife: ThePlantCircadianClockSomers,D.E.(1999).Thephysiologyandmolecularbasesoftheplantcircadianclock.PlantPhysiol.121:9-20.LivingonarotatingplanetisbiologicallystressfulOvera24hourperiodthereislargevariationinenvironmentalconditionsincludingtempe
2、rature,lightintensity,humidityandpredatorbehaviorSeeKudoh,H.(2016).Molecularphenologyinplants:in naturasystemsbiologyforthecomprehensiveunderstandingofseasonalresponsesundernaturalenvironments.NewPhytol.210:399-412.Image:NASA.Extremeday-nighttemperaturedi
3、fference:57oC(-48oCto9oC,Montana,1972)Typicalday-nightfluctuation:~10oCeachday(centralJapan)Circadianclocksarebiologicaloscillatorswitha~24hourperiodLight-DarkcyclesContinuousdarkness-Higherlevelsofwheelrunningactivityatnight-Incontinuousdarknesstheserhyt
4、hmspersistbutwitha~23hourperiodFigurefromLi,J.-D.,Burton,K.J.,Zhang,C.,Hu,S.-B.andZhou,Q.-Y.(2009).VasopressinreceptorV1aregulatescircadianrhythmsoflocomotoractivityandexpressionofclock-controlledgenesinthesuprachiasmaticnuclei.Am.J.Physiol.296:R824-R830,
5、usedwithpermission.Imagesource:Mylius.InactiveActiveCircadianclockscontrolmanyaspectsofhumanphysiologyImagesource:Addicted0422.30BowelmovementssuppressedDeepestsleep21.00Melatoninsecretionstarts19.00Highestbodytemperature17.00Greatestmusclestrength15.30Fa
6、stestreactiontime14.30Bestcoordination06.45Riseinbloodpressure04.30Lowestbodytemperature02.00DeepestsleepMelatoninsecretionstops07.30Highalertness10.0018.30HighestbloodpressurePlantcircadianbiologyhasalonghistoryIllustrationof‘sleep’movementsinMedicago,fr
7、omCharlesDarwin(1880)‘ThePowerofMovementinPlants’Imagesources:H.Zell,CharlesDarwin“PowerofMovementinPlants”DeMarian(1729)‘Observationbotanique’ofMimosapudica:“sensitivetotheSunanddaylight:theleaves&theirpedunclesfoldthemselvesaway&contractaroundsunset,int
8、hesamewaytheydowhenthePlantistouchedorshaken.”ArchitectureofthecircadianclockPrinciplesofoperationofplantcircadianclocksAspectoftheCircadianSystemBiologicalFunctionCircadianoscillatorGeneratearhythmwitha~24hperiodwi
