planthormonesignaltransductionpathway植物激素信號轉(zhuǎn)導(dǎo)通路

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1、PlantHormoneSignaltransductionpathwayTalkOutlineGeneralintroductiontocellsignalingtransductionpathwaysinplant.Differentplanthormonesandtheirphysiologicalfunctioninplants.Comparisonbetweenplanthormonesandanimalhormonesaction.Waysorapproachesinstudyingplanthormonesignalingtransductionpath

2、ways.Molecularmechanismofvariousplanthormonesignaltransductionpathways(a)ubiquitin-dependentproteindegradation(negativeregulator)(b)towcomponentsystem(phospho-relay).6.Manipulationofplantgrowthanddevelopmentwithknowledgefromplanthormonesignaltransductionpathway.ex.Secondgreenrevolution.A

3、nalogyviewofcellsignalingtransductionpathwayInput(command)KeyboardSignalperceptionEndogenous:phytohormoneExogenous:environmentalcueCPU(CentralProcessingUnit)ChipSignalTransductionNetworkCompiling,Integration,processingOutput(performance)PrinterSignalResponseMorphogenesischange,Growthdeve

4、lopmentdifferentiationVarioussignalingtransductionpathwaysinplantsCalcium(Ca+2)signaling(regulatorynetwork)LipidsignalingtransductionpathwayReactiveoxygenspecies(ROS)signalingNitricoxide(NO)signalingtransductionpathwaySugarsensingresponsivepathwayWounding-signaltransductionpathway(plant-

5、pathogeninteraction)LightsignalingresponsivepathwayBiologicalo’clock(circadianrhythm)regulatorypathwayDevelopmentregulatorypathwaye.g.flowering(autonomous),lead,root,trichomeformationrootapicalmeristem(RAM)shootapicalmeristem(SAM)formationpolarityandcellcytoskeletonrearrangementSpecificc

6、ellfatedeterminationanddifferentiation(Xylemandphloemspecification,rootorganization(patterning))Abioticstresssignalingpathways(salt,drought,heat,cold,metal,vernalizationetc.)Planthormonesignalingtransduction(auxin,ethylene,cytokinin,gibberellin,abscisicacid,brasinosteroid,jasmonicacidetc

7、.)DefinitionofplanthormoneThewordhormoneisderivedfromtheGreekverbmeaningtoexcite.hormonesareorganicsubstancessynthesizedinonetissueandtransportedoutwheretheirpresenceresultsinphysiologicalresponses(notalwaystrue;mayactatorclosetosynthesissite).Theyarerequiredinminuteamoun